J. M. Hamamreh | Antalya Bilim University (original) (raw)

Papers by J. M. Hamamreh

Research paper thumbnail of Physical Layer Security Analysis of Hybrid MIMO Technology

RS Open Journal on Innovative Communication Technologies

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Research paper thumbnail of Floating OFDM-SNM for PAPR and OOBE Reduction

2021 IEEE 93rd Vehicular Technology Conference (VTC2021-Spring), 2021

The novel orthogonal frequency division multiplexing with subcarrier number modulation (OFDM-SNM)... more The novel orthogonal frequency division multiplexing with subcarrier number modulation (OFDM-SNM) transmission scheme offers high spectral and energy efficiency compared to the conventional OFDM; this is due to the extra information bits loaded over the active subcarriers. However, the OFDM-SNM scheme has a high and comparable peak-to-average power ratio (PAPR) performance to the classical OFDM. Besides the high PAPR in OFDM-SNM, out-of-band emission (OOBE) often happens between the adjacent blocks. To address the above-mentioned problems, we introduce an enhanced version of the classical OFDM-SNM, where the active subcarriers’ positions are cleverly placed to reduce the PAPR and OOBE values. Power spectral density (PSD) and complementary cumulative distribution function (CCDF) of PAPR are used as performance metrics to assess the PAPR and OOBE performances of the proposed scheme. The obtained simulation results exhibit improved PAPR and OOBE performances of the proposed scheme alon...

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Research paper thumbnail of Novel Small-Scale NOMA Communication Technique Using Auxiliary Signal Superposition

2020 International Conference on UK-China Emerging Technologies (UCET), 2020

In this work, an advanced novel small-scale non-orthogonal multiple access (NOMA) utilizing physi... more In this work, an advanced novel small-scale non-orthogonal multiple access (NOMA) utilizing physical layer security (PLS) techniques used for enhancing communication security and reliability for two users is proposed. This work is motivated by current challenges faced by the conventional NOMA techniques. For instance, the recent exclusion of power-domain NOMA (PD-NOMA) from 3GPP release 17 due to its performance degradation. The efficiency and novelty of the proposed system are presented via mathematical analysis and validated by Monte Carlo simulations. Results indicate that the proposed model achieves secure and efficient communication, suitable for low power consumption and limited processing applications.

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Research paper thumbnail of An Efficient Security Method Based on Exploiting Channel State Information (CSI)

2017 International Conference on Frontiers of Information Technology (FIT), 2017

A channel amplitude quantization method that can effectively quantize the channel response using ... more A channel amplitude quantization method that can effectively quantize the channel response using just one single threshold value is proposed in order to extract a random manipulating sequence with good secrecy properties. Specifically, a Time Division Duplex (TDD) wireless system is considered over independent identical distributed (i.i.d.) Rayleigh fast fading channel, where potential passive eavesdroppers (Eves) can only estimate their own channel and have no knowledge about CSI between legitimate communication parties. The transmitter (Alice) is only aware of the CSI of the legitimate user (Bob). Particularly, the proposed security technique takes the bits of the transmitted data packets and manipulate them with a logical vector that characterizes the channel randomness based on the estimated CSI gain. The process of manipulation is implemented on a bit level basis using an XOR operation exactly before modulation process. The same XOR operation is implemented after demodulation p...

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Research paper thumbnail of Is Cell-Free Massive MIMO (CF-MMIMO) Equivalent to the Already Existing and Commercialized pCell Technology

RS Open Journal on Innovative Communication Technologies, 2021

Distributed antenna system (DAS) is a highly diversified concept that can help lower radiated pow... more Distributed antenna system (DAS) is a highly diversified concept that can help lower radiated power, maximize coverage, and improve spectral efficiency. Yet, the most exciting feature of DAS is the distribution of remote radio heads (RRH) or antennas over a wide geographical area, which allows the use of less complex signal processing techniques resulting in the reduction of systems’ size and cost. These features of DAS were utilized in network MIMO, distributed MIMO, multi-cell MIMO, and distributed-input distributed-output (DIDO) systems to move away from the centralized approach as in conventional multi-user and massive MIMO systems. In this tutorial paper, we first talk about MIMO systems with their relevant technologies by categorizing them into two main approaches according to their working principles and systematic architecture; the first approach is based on a centralized (or collocated) architecture, whereas the second is based on a decentralized (or distributed) architecture. We then deep dive into all the different technologies related to these architectures one by one and explain each in detail with much more focus on the similarities and differences between them. After that, we exposition the main target of this study, which is to answer the following question "Is cell-free massive MIMO (CF-MMIMO) equivalent to the already existing and commercialized pCell technology?". To confidently answer this question, we comprehensively and deeply study the two technologies considering the differences in their system models and look into their conceptual formulations as well as their respective channel models. More particularly, we detail CF-MMIMO and pCell architectures while giving special attention to pCell's SDR wireless platform and stating why it is crucial for the current wireless systems. Then, we present the understandings that are acquired after careful observations and provide recommendations based upon them. In short, this study aims to focus the reader attention on the fact that all the distributed and cell-free MIMO-related technologies work on the same principle, and the way these systems are built makes them fundamentally equivalent, yet, they are displayed quite differently using different terminologies and perspectives, which can cause confusion to readers and end up misleading future researchers.
============
WISLAB (wislabi.com/solutions) offers solutions for building and deploying fully secure, cloud-based, and low-cost end-to-end 4G/5G networks along with providing consultations on helping companies reduce their networks CAPEX/OPEX cost and determine which solutions are best suited for their needs and use cases.

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Research paper thumbnail of Interference Signal Superposition-aided MIMO with Antenna Number Modulation and Adaptive Antenna Selection for Achieving Perfect Secrecy

RS Open Journal on Innovative Communication Technologies, 2021

In this paper, a novel secure data transmission method called interference signal superposition-a... more In this paper, a novel secure data transmission method called interference signal superposition-aided multiple-input multiple-output with antenna number modulation and adaptive antenna selection (ISS-MIMO-ANM-AAS) is presented to defend transmission systems against eavesdropping attacks or to share secret information between two communication parties in scenarios, where perfect secrecy and ultimate confidentiality are required to be achieved. In the proposed method, while data is transmitted to the legitimate receiver by exploiting the features of MIMO-ANM through transmitting additional data bits with the number of active antennas along with those bits sent by using conventional M-PSK/QAM modulation, the data that the eavesdropper receives is aimed to be mixed by an interference signal superposed (ISS) with the original signal to eliminate the possible wiretapping activities. The conducted theoretical analysis along with the obtained numerical simulations for the proposed ISS-MIMO-ANM-AAS method proves the effectiveness of the scheme, where MIMO-ANM transmission is shown to be fully secured through the ISS algorithm. Thus, the introduced ISS-MIMO-ANM-AAS method can be considered a strong potential candidate method for scenarios where ultra-security is the main requirement of wireless systems including WiFi, 5G, 6G, and beyond technologies. The codes of this article can be found at https://researcherstore.com/product/simulation-codes-for-the-interference-signal-superposition-mimo-with-antenna-number-modulation-and-adaptive-antenna-selection-for-achieving-perfect-secrecy/
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The Matlab simulation codes used to generate the results in this paper can be found at https://researcherstore.com with the name ISS-MIMO-ANM. WISLAB (wislabi.com/solutions) offers solutions for building and deploying fully secure, cloud-based, and low-cost end-to-end 4G/5G networks along with providing consultations on helping companies reduce their networks CAPEX/OPEX cost and determine which solutions are best suited for their needs and use cases.

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Research paper thumbnail of A New Enhanced Coordinated Multi-Point (CoMP) Transmission Design for Cancelling Inter-cell Interference for Cell-Edge Users Using Superimposed Supporting Signals

RS Open Journal on Innovative Communication Technologies, 2021

Mobile data traffic is rapidly increasing with smartphones’ massive spread and multimedia-driven ... more Mobile data traffic is rapidly increasing with smartphones’ massive spread and multimedia-driven applications. To cope up with the data demand, operators will continue to deploy new small cells and update networks to advanced 4G LTE and leading-edge 5G NR technologies to take advantage of their superior capabilities. Despite their many improved features, the cell edge interference effect is still a very challenging problem in mobile wireless networks, and it has recently gained significant attention with the dawn of future generation mobile communications systems like 5G and 6G as such interference causes significant performance degradation in cell edge systems. Next-generation wireless communication systems will require higher spectral efficiency, enhanced system reliability, and much more improved SNR gain, which can be attained by the elimination of inter-cell interference, and more efficient utilization of resources than currently employed systems. Motivated by this observation, the proposed method in this article targets addressing the previously mentioned challenges and requirements, where we present a novel enhanced cooperative multiple points (eCoMP) technique that deploys two base stations to transmit superimposed user signals with the same spatial, temporal and spectral radio resources. In particular, we introduce and model the proposed concept of using supporting signals that are superimposed with the user signals to cancel inter-cell interference at the cell edge. This is achieved without sacrificing temporal-spectral-spatial resources while providing low complexity at the receiver side. Computer simulations are conducted and analytical analysis is performed to verify the effectiveness and superiority of the proposed solution compared to other competitive schemes in the literature.

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Research paper thumbnail of Secure communication via untrusted switchable decode-and-forward relay

2017 13th International Wireless Communications and Mobile Computing Conference (IWCMC), 2017

In this paper, a practical power efficient technique is proposed for an untrusted decode-and-forw... more In this paper, a practical power efficient technique is proposed for an untrusted decode-and-forward (DAF) based cooperative communication system to provide secure communication between the source and the destination. More specifically, a DAF relay, called switchable DAF (sDAF), is designed in such a way that it can be switched to amplify-and-forward (AAF) in certain predefined situations. The algorithm is based on destination-assisted jamming and comprised of two phases. The first phase securely shares the random manipulating sequence (RMS) through an untrusted relay, while the second phase uses this RMS for secure communication through untrusted relay. This algorithm not only provides secrecy, but also enhances the power efficiency as compared to other destination-assisted jamming techniques.

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Research paper thumbnail of An Effective Design for Polar Codes over Multipath Fading Channels

Smart Cities Performability, Cognition, & Security, 2019

Polar codes, recently adopted in 5G standard due to their excellent performance at a very low com... more Polar codes, recently adopted in 5G standard due to their excellent performance at a very low complexity compared to other competitive schemes in the literature, are deemed to be a strong candidate for the Internet of Things (IoT) applications as well due to meeting their requirements. However, since polar codes construction is naturally channel-dependent, there has recently been an increasing interest in addressing the challenge of making polar codes work in realistic fading environments as they do in a binary symmetric channel (BSC). Recent studies on polar codes for fading channels have mainly focused on constructing new specific polar codes suitable to particular fading channels. This results in a non-universal code structure, leading to continuous changes in the code structure based on the channel, which is not desirable in practice. To address this problem, we develop and propose a novel transceiver architecture which enables using the polar coding design of a binary input add...

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Research paper thumbnail of New Physical Layer Key Generation Dimensions: Subcarrier Indices/Positions-Based Key Generation

In this letter, novel algorithms for secret key generation from the wireless channel in multi-car... more In this letter, novel algorithms for secret key generation from the wireless channel in multi-carrier systems are proposed for ensuring the confidentiality and authentication in wireless communication systems. The novelty of the proposed algorithms lies in the generation of random secret bits not just from the magnitudes of orthogonal frequency division multiplexing (OFDM) subchannels as it has conventionally been done in the literature, but also from the indices/positions of the subchannels corresponding to highest gains. Thus, the proposed algorithms provide additional dimensions for enhancing overall key rates. The efficiency of the proposed algorithms is evaluated in terms of key mismatch rate (KMR) and key generation rate (KGR). Simulation results showed that the proposed algorithms can enhance the overall performance of physical layer key-based algorithms by providing extra dimensions for secret key generation.

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Research paper thumbnail of NC-OFDM-SPM: A Two-Dimensional Non-Coherent Modulation Scheme for Achieving the Coherent Performance of OFDM along with Sending an Additional Data-stream

RS Open Journal on Innovative Communication Technologies, 2021

A promising candidate solution for reducing complexity in future wireless systems is the use of n... more A promising candidate solution for reducing complexity in future wireless systems is the use of non-coherent designs; however, it is very well known in the literature that non-coherent schemes perform worse than their coherent counterparts. To address this longstanding challenging trade-off, we demonstrate and prove in this work the ability of the proposed two-dimensional modulation scheme termed as non-coherent orthogonal frequency division multiplexing with subcarrier power modulation and differential phase shift keying in achieving the performance of a coherent design, while reducing complexity. Although the proposed design is non-coherent (i.e., it uses differential phase shift keying and power difference to convey information), it achieves the same bit error rate (BER) performance as conventional OFDM with coherent BPSK. Furthermore, since the proposed scheme employs two-dimensional modulations simultaneously (i.e., DPSK and subcarrier power levels), an additional data stream c...

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Research paper thumbnail of Simulation Codes of A New Enhanced CoMP Transmission Method

This code generates and produces the figures in the paper titled “A New Enhanced Coordinated Mult... more This code generates and produces the figures in the paper titled “A New Enhanced Coordinated Multi-Point (CoMP) Transmission Design for Cancelling Inter-cell Interference for Cell-Edge Users Using Superimposed Supporting Signals“
https://doi.org/10.46470/03d8ffbd.1655f19b

Summary: Mobile data traffic is rapidly increasing with smartphones’ massive spread and multimedia-driven applications. To cope up with the data demand, operators will continue to deploy new small cells and update networks to advanced 4G LTE and leading-edge 5G NR technologies to take advantage of their superior capabilities. Despite their many improved features, the cell edge interference effect is still a very challenging problem in mobile wireless networks, and it has recently gained significant attention with the dawn of future generation mobile communications systems like 5G and 6G as such interference causes significant performance degradation in cell edge systems. Next-generation wireless communication systems will require higher spectral efficiency, enhanced system reliability, and much more improved SNR gain, which can be attained by the elimination of inter-cell interference, and more efficient utilization of resources than currently employed systems. Motivated by this observation, the proposed method in this article targets addressing the previously mentioned challenges and requirements, where we present a novel enhanced cooperative multiple points (eCoMP) technique that deploys two base stations to transmit superimposed user signals with the same spatial, temporal and spectral radio resources. In particular, we introduce and model the proposed concept of using supporting signals that are superimposed with the user signals to cancel inter-cell interference at the cell edge. This is achieved without sacrificing temporal-spectral-spatial resources while providing low complexity at the receiver side. Computer simulations are conducted and analytical analysis is performed to verify the effectiveness and superiority of the proposed solution compared to other competitive schemes in the literature. A New Enhanced Coordinated Multi-Point (CoMP) Transmission Design for Cancelling Inter-cell Interference for Cell-Edge Users Using Superimposed Supporting Signals · Issue 6 (pubpub.org)

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Research paper thumbnail of Orthogonal Frequency Division Multiplexing With Subcarrier Gap Modulation

A new modulation scheme called orthogonal frequency division multiplexing with subcarrier gap mod... more A new modulation scheme called orthogonal frequency division multiplexing with subcarrier gap modulation (OFDM-SGM) is proposed. The proposed scheme embeds extra information bits by exploiting the gap between the active subcarriers in each subblock. The proposed scheme differs from the OFDM-index modulation (OFDM-IM), in which information bits are transmitted using the index of active subcarriers. This OFDM-SGM technique provides superior spectral and energy efficiencies compared to the OFDM-IM, particularly when using binary phase-shift keying (BPSK)-like low constellation schemes, that suit the Internet of Things (IoT) applications that have low complexity. The theoretical error performance of the proposed scheme is presented, and the consistency between the theoretically derived error performance and the simulated one is also provided.

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Research paper thumbnail of Self-Organizing Schedulers in LTE System for Optimized Pixel Throughput Using Neural Network

DESCRIPTION One of the most important requirements for Long Term Evolution (LTE) is minimizing th... more DESCRIPTION One of the most important requirements for Long Term Evolution (LTE) is minimizing the costs and effort of network planning, optimization and configuration to the lowest possible level, while keeping a very good acceptable performance level which can be achieved by using self-organizing networks (SON) concept. This paper presents an efficient technique to train base station (E-NodeB) in order to choose the most appropriate and optimized scheduler in LTE system for each pixel inside an image using Neural Network technique, which leads to an optimized bandwidth and hence increased capacity. The simulation results using our proposed method using self-organizing assigning scheduler indicate an overall 33% saving in

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Research paper thumbnail of A New MIMO Technique Utilizing Superimposed Auxiliary Signals for Simultaneously Achieving Spatial Multiplexing and Diversity Gains in MIMO-Aided Communication Systems

RS Open Journal on Innovative Communication Technologies, 2021

Future wireless communication systems demand superior spectral efficiency, enhanced system reliab... more Future wireless communication systems demand superior spectral efficiency, enhanced system reliability, improved SNR gain, and better employment of power resources than currently deployed systems. In this work, we propose a new MIMO communication technique that can simultaneously provide multiplexing gain and diversity gain as well as reduce complexity and processing at the receiver side. The proposed system transceiver structure utilizes superimposed auxiliary signals that are designed based on the wireless channel characteristics to eliminate inter antenna interference as well as completely remove the channel effects at the receiver while providing low reception complexity. The efficiency and novelty of the proposed system are verified via extensive mathematical analysis and validated by numerical simulations. The obtained results indicate that the proposed new model achieves high throughput, enhanced reliability, improved connectivity, less complexity, and more efficient communic...

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Research paper thumbnail of Hybrid MIMO: A New Transmission Method For Simultaneously Achieving Spatial Multiplexing and Diversity Gains in MIMO Systems

RS Open Journal on Innovative Communication Technologies, 2021

Multiple input multiple output (MIMO) technology has evolved over the past few years into a techn... more Multiple input multiple output (MIMO) technology has evolved over the past few years into a technology with great potential to drive the direction of future wireless communications. MIMO technology has become a solid reality when massive MIMO systems (MIMO with large number of antennas and transceivers) were commercially deployed in several countries across the world in the recent past. Moreover, MIMO has been integrated into state-of-the-art paradigms such as fifth-generation (5G) networks as one of the main enabling technologies. MIMO possesses many attractive and highly desirable properties such as spatial multiplexing, diversity gains, and adaptive beamforming gains that leads to high data rates, enhanced reliability, and other enhancements. Nevertheless, beyond 5G technologies demand wireless communication systems with, among other properties, immensely higher data rates and better reliability simultaneously at the same time. In this work, a new, novel MIMO technique for simult...

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Research paper thumbnail of Time-frequency characteristics and PAPR reduction of OTDM waveform for 5G and beyond

2017 10th International Conference on Electrical and Electronics Engineering (ELECO), 2017

This paper provides an in-depth investigation and analysis on the characteristics of channel-base... more This paper provides an in-depth investigation and analysis on the characteristics of channel-based transform waveforms and their differences from Fourier transform-based waveforms. Particularly, the basis functions of the recently proposed orthogonal transform division multiplexing (OTDM) waveform, which belongs to the category of channel-based transform waveforms, are comprehensively compared with the fixed exponential basis functions of orthogonal frequency division multiplexing (OFDM) waveform, which pertains to the class of Fourier transform-based waveforms. The obtained results show significant differences in the time and frequency characteristics of both classes of the waveforms. Also, the peak-to-average power ratio (PAPR) of OTDM is investigated and compared to OFDM. Then, a new effective technique, referred to as OTDM with edge subcarrier dedication (OTDM-ESD), is proposed for PAPR reduction by exploiting the special characteristics of the effective channel response in OTDM...

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Research paper thumbnail of A Novel Transceiver Architecture for Making Polar Codes Work Over Multipath Fading Channels as They Do Over AWGN Channels

Polar codes, recently accepted for adoption in 5G standard due to their excellent performance at ... more Polar codes, recently accepted for adoption in 5G standard due to their excellent performance at a very low complexity compared to other competitive schemes in the literature, are deemed to be a strong candidate for the Internet of Things (IoT) applications as well due to meeting their requirements. However, since polar codes construction is naturally channel-dependent, there has recently been an increasing interest in addressing the challenge of making polar codes work in realistic fading environments as they do in a binary symmetric channel (BSC). Recent studies on polar codes for fading channels have mainly focused on constructing new specific polar codes suitable to particular fading channels. This results in a non-universal code structure, leading to continuous changes in the code structure based on the channel, which is not desirable in practice. To address this problem, we develop and propose a novel transceiver architecture which enables using the polar coding design of a bi...

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Research paper thumbnail of Convolutional Neural Network Based Equalizer for Improving the Reliability Performance of OFDM with Subcarrier Power Modulation

RS Open Journal on Innovative Communication Technologies, 2021

As the demand for higher data rates has rapidly been increasing day after day, researchers around... more As the demand for higher data rates has rapidly been increasing day after day, researchers around the world have given serious attention and made significant efforts towards exploring new techniques that can improve the spectral efficiency of future wireless systems. Among these methods, the modulation technique named as orthogonal frequency division multiplexing with subcarrier power modulation (OFDM-SPM) is considered as a key potential candidate transmission method, which has the potential to effectively improve the per-user spectral efficiency of wireless networks. However, the reliability performance efficiency of OFDM-SPM is not that high, where it was found that the additional data stream conveyed by sub-carriers’ power has higher bit error rate (BER) performance compared to the data stream conveyed by conventional modulation schemes. To improve the reliability performance of OFDM-SPM furthermore, in this paper, we propose the use of Convolutional Neural Networks (CNN) based...

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Research paper thumbnail of Secure and Reliable IoT Communications Using Nonorthogonal Signals’ Superposition with Dual-Transmission

2020 IEEE 31st Annual International Symposium on Personal, Indoor and Mobile Radio Communications, 2020

Ensuring secure communication for internet of things (IoT) has drawn much attention because of th... more Ensuring secure communication for internet of things (IoT) has drawn much attention because of the limitation in the use of conventional cryptographic techniques owing to the unique features of IoT devices such as low complexity, lightweight computing, and power constraints. Physical layer security (PLS) has the potential to provide security solutions that are suitable for such applications. In this article, an efficient PLS approach is proposed for providing secure communication against external and internal eavesdroppers in a downlink multi-carrier IoT communication system. The system consists of a transmitter with a single active antenna (and a single radio frequency chain) that is trying to communicate with two single-antenna IoT devices in the presence of a passive eavesdropper. In the proposed algorithm, frequency selective channel based pre-coder matrices and dual-transmission approach are jointly employed to provide simple and secure communication without complex computation...

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Research paper thumbnail of Physical Layer Security Analysis of Hybrid MIMO Technology

RS Open Journal on Innovative Communication Technologies

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Research paper thumbnail of Floating OFDM-SNM for PAPR and OOBE Reduction

2021 IEEE 93rd Vehicular Technology Conference (VTC2021-Spring), 2021

The novel orthogonal frequency division multiplexing with subcarrier number modulation (OFDM-SNM)... more The novel orthogonal frequency division multiplexing with subcarrier number modulation (OFDM-SNM) transmission scheme offers high spectral and energy efficiency compared to the conventional OFDM; this is due to the extra information bits loaded over the active subcarriers. However, the OFDM-SNM scheme has a high and comparable peak-to-average power ratio (PAPR) performance to the classical OFDM. Besides the high PAPR in OFDM-SNM, out-of-band emission (OOBE) often happens between the adjacent blocks. To address the above-mentioned problems, we introduce an enhanced version of the classical OFDM-SNM, where the active subcarriers’ positions are cleverly placed to reduce the PAPR and OOBE values. Power spectral density (PSD) and complementary cumulative distribution function (CCDF) of PAPR are used as performance metrics to assess the PAPR and OOBE performances of the proposed scheme. The obtained simulation results exhibit improved PAPR and OOBE performances of the proposed scheme alon...

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Research paper thumbnail of Novel Small-Scale NOMA Communication Technique Using Auxiliary Signal Superposition

2020 International Conference on UK-China Emerging Technologies (UCET), 2020

In this work, an advanced novel small-scale non-orthogonal multiple access (NOMA) utilizing physi... more In this work, an advanced novel small-scale non-orthogonal multiple access (NOMA) utilizing physical layer security (PLS) techniques used for enhancing communication security and reliability for two users is proposed. This work is motivated by current challenges faced by the conventional NOMA techniques. For instance, the recent exclusion of power-domain NOMA (PD-NOMA) from 3GPP release 17 due to its performance degradation. The efficiency and novelty of the proposed system are presented via mathematical analysis and validated by Monte Carlo simulations. Results indicate that the proposed model achieves secure and efficient communication, suitable for low power consumption and limited processing applications.

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Research paper thumbnail of An Efficient Security Method Based on Exploiting Channel State Information (CSI)

2017 International Conference on Frontiers of Information Technology (FIT), 2017

A channel amplitude quantization method that can effectively quantize the channel response using ... more A channel amplitude quantization method that can effectively quantize the channel response using just one single threshold value is proposed in order to extract a random manipulating sequence with good secrecy properties. Specifically, a Time Division Duplex (TDD) wireless system is considered over independent identical distributed (i.i.d.) Rayleigh fast fading channel, where potential passive eavesdroppers (Eves) can only estimate their own channel and have no knowledge about CSI between legitimate communication parties. The transmitter (Alice) is only aware of the CSI of the legitimate user (Bob). Particularly, the proposed security technique takes the bits of the transmitted data packets and manipulate them with a logical vector that characterizes the channel randomness based on the estimated CSI gain. The process of manipulation is implemented on a bit level basis using an XOR operation exactly before modulation process. The same XOR operation is implemented after demodulation p...

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Research paper thumbnail of Is Cell-Free Massive MIMO (CF-MMIMO) Equivalent to the Already Existing and Commercialized pCell Technology

RS Open Journal on Innovative Communication Technologies, 2021

Distributed antenna system (DAS) is a highly diversified concept that can help lower radiated pow... more Distributed antenna system (DAS) is a highly diversified concept that can help lower radiated power, maximize coverage, and improve spectral efficiency. Yet, the most exciting feature of DAS is the distribution of remote radio heads (RRH) or antennas over a wide geographical area, which allows the use of less complex signal processing techniques resulting in the reduction of systems’ size and cost. These features of DAS were utilized in network MIMO, distributed MIMO, multi-cell MIMO, and distributed-input distributed-output (DIDO) systems to move away from the centralized approach as in conventional multi-user and massive MIMO systems. In this tutorial paper, we first talk about MIMO systems with their relevant technologies by categorizing them into two main approaches according to their working principles and systematic architecture; the first approach is based on a centralized (or collocated) architecture, whereas the second is based on a decentralized (or distributed) architecture. We then deep dive into all the different technologies related to these architectures one by one and explain each in detail with much more focus on the similarities and differences between them. After that, we exposition the main target of this study, which is to answer the following question "Is cell-free massive MIMO (CF-MMIMO) equivalent to the already existing and commercialized pCell technology?". To confidently answer this question, we comprehensively and deeply study the two technologies considering the differences in their system models and look into their conceptual formulations as well as their respective channel models. More particularly, we detail CF-MMIMO and pCell architectures while giving special attention to pCell's SDR wireless platform and stating why it is crucial for the current wireless systems. Then, we present the understandings that are acquired after careful observations and provide recommendations based upon them. In short, this study aims to focus the reader attention on the fact that all the distributed and cell-free MIMO-related technologies work on the same principle, and the way these systems are built makes them fundamentally equivalent, yet, they are displayed quite differently using different terminologies and perspectives, which can cause confusion to readers and end up misleading future researchers.
============
WISLAB (wislabi.com/solutions) offers solutions for building and deploying fully secure, cloud-based, and low-cost end-to-end 4G/5G networks along with providing consultations on helping companies reduce their networks CAPEX/OPEX cost and determine which solutions are best suited for their needs and use cases.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Interference Signal Superposition-aided MIMO with Antenna Number Modulation and Adaptive Antenna Selection for Achieving Perfect Secrecy

RS Open Journal on Innovative Communication Technologies, 2021

In this paper, a novel secure data transmission method called interference signal superposition-a... more In this paper, a novel secure data transmission method called interference signal superposition-aided multiple-input multiple-output with antenna number modulation and adaptive antenna selection (ISS-MIMO-ANM-AAS) is presented to defend transmission systems against eavesdropping attacks or to share secret information between two communication parties in scenarios, where perfect secrecy and ultimate confidentiality are required to be achieved. In the proposed method, while data is transmitted to the legitimate receiver by exploiting the features of MIMO-ANM through transmitting additional data bits with the number of active antennas along with those bits sent by using conventional M-PSK/QAM modulation, the data that the eavesdropper receives is aimed to be mixed by an interference signal superposed (ISS) with the original signal to eliminate the possible wiretapping activities. The conducted theoretical analysis along with the obtained numerical simulations for the proposed ISS-MIMO-ANM-AAS method proves the effectiveness of the scheme, where MIMO-ANM transmission is shown to be fully secured through the ISS algorithm. Thus, the introduced ISS-MIMO-ANM-AAS method can be considered a strong potential candidate method for scenarios where ultra-security is the main requirement of wireless systems including WiFi, 5G, 6G, and beyond technologies. The codes of this article can be found at https://researcherstore.com/product/simulation-codes-for-the-interference-signal-superposition-mimo-with-antenna-number-modulation-and-adaptive-antenna-selection-for-achieving-perfect-secrecy/
=============
The Matlab simulation codes used to generate the results in this paper can be found at https://researcherstore.com with the name ISS-MIMO-ANM. WISLAB (wislabi.com/solutions) offers solutions for building and deploying fully secure, cloud-based, and low-cost end-to-end 4G/5G networks along with providing consultations on helping companies reduce their networks CAPEX/OPEX cost and determine which solutions are best suited for their needs and use cases.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of A New Enhanced Coordinated Multi-Point (CoMP) Transmission Design for Cancelling Inter-cell Interference for Cell-Edge Users Using Superimposed Supporting Signals

RS Open Journal on Innovative Communication Technologies, 2021

Mobile data traffic is rapidly increasing with smartphones’ massive spread and multimedia-driven ... more Mobile data traffic is rapidly increasing with smartphones’ massive spread and multimedia-driven applications. To cope up with the data demand, operators will continue to deploy new small cells and update networks to advanced 4G LTE and leading-edge 5G NR technologies to take advantage of their superior capabilities. Despite their many improved features, the cell edge interference effect is still a very challenging problem in mobile wireless networks, and it has recently gained significant attention with the dawn of future generation mobile communications systems like 5G and 6G as such interference causes significant performance degradation in cell edge systems. Next-generation wireless communication systems will require higher spectral efficiency, enhanced system reliability, and much more improved SNR gain, which can be attained by the elimination of inter-cell interference, and more efficient utilization of resources than currently employed systems. Motivated by this observation, the proposed method in this article targets addressing the previously mentioned challenges and requirements, where we present a novel enhanced cooperative multiple points (eCoMP) technique that deploys two base stations to transmit superimposed user signals with the same spatial, temporal and spectral radio resources. In particular, we introduce and model the proposed concept of using supporting signals that are superimposed with the user signals to cancel inter-cell interference at the cell edge. This is achieved without sacrificing temporal-spectral-spatial resources while providing low complexity at the receiver side. Computer simulations are conducted and analytical analysis is performed to verify the effectiveness and superiority of the proposed solution compared to other competitive schemes in the literature.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Secure communication via untrusted switchable decode-and-forward relay

2017 13th International Wireless Communications and Mobile Computing Conference (IWCMC), 2017

In this paper, a practical power efficient technique is proposed for an untrusted decode-and-forw... more In this paper, a practical power efficient technique is proposed for an untrusted decode-and-forward (DAF) based cooperative communication system to provide secure communication between the source and the destination. More specifically, a DAF relay, called switchable DAF (sDAF), is designed in such a way that it can be switched to amplify-and-forward (AAF) in certain predefined situations. The algorithm is based on destination-assisted jamming and comprised of two phases. The first phase securely shares the random manipulating sequence (RMS) through an untrusted relay, while the second phase uses this RMS for secure communication through untrusted relay. This algorithm not only provides secrecy, but also enhances the power efficiency as compared to other destination-assisted jamming techniques.

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Research paper thumbnail of An Effective Design for Polar Codes over Multipath Fading Channels

Smart Cities Performability, Cognition, & Security, 2019

Polar codes, recently adopted in 5G standard due to their excellent performance at a very low com... more Polar codes, recently adopted in 5G standard due to their excellent performance at a very low complexity compared to other competitive schemes in the literature, are deemed to be a strong candidate for the Internet of Things (IoT) applications as well due to meeting their requirements. However, since polar codes construction is naturally channel-dependent, there has recently been an increasing interest in addressing the challenge of making polar codes work in realistic fading environments as they do in a binary symmetric channel (BSC). Recent studies on polar codes for fading channels have mainly focused on constructing new specific polar codes suitable to particular fading channels. This results in a non-universal code structure, leading to continuous changes in the code structure based on the channel, which is not desirable in practice. To address this problem, we develop and propose a novel transceiver architecture which enables using the polar coding design of a binary input add...

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Research paper thumbnail of New Physical Layer Key Generation Dimensions: Subcarrier Indices/Positions-Based Key Generation

In this letter, novel algorithms for secret key generation from the wireless channel in multi-car... more In this letter, novel algorithms for secret key generation from the wireless channel in multi-carrier systems are proposed for ensuring the confidentiality and authentication in wireless communication systems. The novelty of the proposed algorithms lies in the generation of random secret bits not just from the magnitudes of orthogonal frequency division multiplexing (OFDM) subchannels as it has conventionally been done in the literature, but also from the indices/positions of the subchannels corresponding to highest gains. Thus, the proposed algorithms provide additional dimensions for enhancing overall key rates. The efficiency of the proposed algorithms is evaluated in terms of key mismatch rate (KMR) and key generation rate (KGR). Simulation results showed that the proposed algorithms can enhance the overall performance of physical layer key-based algorithms by providing extra dimensions for secret key generation.

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Research paper thumbnail of NC-OFDM-SPM: A Two-Dimensional Non-Coherent Modulation Scheme for Achieving the Coherent Performance of OFDM along with Sending an Additional Data-stream

RS Open Journal on Innovative Communication Technologies, 2021

A promising candidate solution for reducing complexity in future wireless systems is the use of n... more A promising candidate solution for reducing complexity in future wireless systems is the use of non-coherent designs; however, it is very well known in the literature that non-coherent schemes perform worse than their coherent counterparts. To address this longstanding challenging trade-off, we demonstrate and prove in this work the ability of the proposed two-dimensional modulation scheme termed as non-coherent orthogonal frequency division multiplexing with subcarrier power modulation and differential phase shift keying in achieving the performance of a coherent design, while reducing complexity. Although the proposed design is non-coherent (i.e., it uses differential phase shift keying and power difference to convey information), it achieves the same bit error rate (BER) performance as conventional OFDM with coherent BPSK. Furthermore, since the proposed scheme employs two-dimensional modulations simultaneously (i.e., DPSK and subcarrier power levels), an additional data stream c...

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Research paper thumbnail of Simulation Codes of A New Enhanced CoMP Transmission Method

This code generates and produces the figures in the paper titled “A New Enhanced Coordinated Mult... more This code generates and produces the figures in the paper titled “A New Enhanced Coordinated Multi-Point (CoMP) Transmission Design for Cancelling Inter-cell Interference for Cell-Edge Users Using Superimposed Supporting Signals“
https://doi.org/10.46470/03d8ffbd.1655f19b

Summary: Mobile data traffic is rapidly increasing with smartphones’ massive spread and multimedia-driven applications. To cope up with the data demand, operators will continue to deploy new small cells and update networks to advanced 4G LTE and leading-edge 5G NR technologies to take advantage of their superior capabilities. Despite their many improved features, the cell edge interference effect is still a very challenging problem in mobile wireless networks, and it has recently gained significant attention with the dawn of future generation mobile communications systems like 5G and 6G as such interference causes significant performance degradation in cell edge systems. Next-generation wireless communication systems will require higher spectral efficiency, enhanced system reliability, and much more improved SNR gain, which can be attained by the elimination of inter-cell interference, and more efficient utilization of resources than currently employed systems. Motivated by this observation, the proposed method in this article targets addressing the previously mentioned challenges and requirements, where we present a novel enhanced cooperative multiple points (eCoMP) technique that deploys two base stations to transmit superimposed user signals with the same spatial, temporal and spectral radio resources. In particular, we introduce and model the proposed concept of using supporting signals that are superimposed with the user signals to cancel inter-cell interference at the cell edge. This is achieved without sacrificing temporal-spectral-spatial resources while providing low complexity at the receiver side. Computer simulations are conducted and analytical analysis is performed to verify the effectiveness and superiority of the proposed solution compared to other competitive schemes in the literature. A New Enhanced Coordinated Multi-Point (CoMP) Transmission Design for Cancelling Inter-cell Interference for Cell-Edge Users Using Superimposed Supporting Signals · Issue 6 (pubpub.org)

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Research paper thumbnail of Orthogonal Frequency Division Multiplexing With Subcarrier Gap Modulation

A new modulation scheme called orthogonal frequency division multiplexing with subcarrier gap mod... more A new modulation scheme called orthogonal frequency division multiplexing with subcarrier gap modulation (OFDM-SGM) is proposed. The proposed scheme embeds extra information bits by exploiting the gap between the active subcarriers in each subblock. The proposed scheme differs from the OFDM-index modulation (OFDM-IM), in which information bits are transmitted using the index of active subcarriers. This OFDM-SGM technique provides superior spectral and energy efficiencies compared to the OFDM-IM, particularly when using binary phase-shift keying (BPSK)-like low constellation schemes, that suit the Internet of Things (IoT) applications that have low complexity. The theoretical error performance of the proposed scheme is presented, and the consistency between the theoretically derived error performance and the simulated one is also provided.

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Research paper thumbnail of Self-Organizing Schedulers in LTE System for Optimized Pixel Throughput Using Neural Network

DESCRIPTION One of the most important requirements for Long Term Evolution (LTE) is minimizing th... more DESCRIPTION One of the most important requirements for Long Term Evolution (LTE) is minimizing the costs and effort of network planning, optimization and configuration to the lowest possible level, while keeping a very good acceptable performance level which can be achieved by using self-organizing networks (SON) concept. This paper presents an efficient technique to train base station (E-NodeB) in order to choose the most appropriate and optimized scheduler in LTE system for each pixel inside an image using Neural Network technique, which leads to an optimized bandwidth and hence increased capacity. The simulation results using our proposed method using self-organizing assigning scheduler indicate an overall 33% saving in

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Research paper thumbnail of A New MIMO Technique Utilizing Superimposed Auxiliary Signals for Simultaneously Achieving Spatial Multiplexing and Diversity Gains in MIMO-Aided Communication Systems

RS Open Journal on Innovative Communication Technologies, 2021

Future wireless communication systems demand superior spectral efficiency, enhanced system reliab... more Future wireless communication systems demand superior spectral efficiency, enhanced system reliability, improved SNR gain, and better employment of power resources than currently deployed systems. In this work, we propose a new MIMO communication technique that can simultaneously provide multiplexing gain and diversity gain as well as reduce complexity and processing at the receiver side. The proposed system transceiver structure utilizes superimposed auxiliary signals that are designed based on the wireless channel characteristics to eliminate inter antenna interference as well as completely remove the channel effects at the receiver while providing low reception complexity. The efficiency and novelty of the proposed system are verified via extensive mathematical analysis and validated by numerical simulations. The obtained results indicate that the proposed new model achieves high throughput, enhanced reliability, improved connectivity, less complexity, and more efficient communic...

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Research paper thumbnail of Hybrid MIMO: A New Transmission Method For Simultaneously Achieving Spatial Multiplexing and Diversity Gains in MIMO Systems

RS Open Journal on Innovative Communication Technologies, 2021

Multiple input multiple output (MIMO) technology has evolved over the past few years into a techn... more Multiple input multiple output (MIMO) technology has evolved over the past few years into a technology with great potential to drive the direction of future wireless communications. MIMO technology has become a solid reality when massive MIMO systems (MIMO with large number of antennas and transceivers) were commercially deployed in several countries across the world in the recent past. Moreover, MIMO has been integrated into state-of-the-art paradigms such as fifth-generation (5G) networks as one of the main enabling technologies. MIMO possesses many attractive and highly desirable properties such as spatial multiplexing, diversity gains, and adaptive beamforming gains that leads to high data rates, enhanced reliability, and other enhancements. Nevertheless, beyond 5G technologies demand wireless communication systems with, among other properties, immensely higher data rates and better reliability simultaneously at the same time. In this work, a new, novel MIMO technique for simult...

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Research paper thumbnail of Time-frequency characteristics and PAPR reduction of OTDM waveform for 5G and beyond

2017 10th International Conference on Electrical and Electronics Engineering (ELECO), 2017

This paper provides an in-depth investigation and analysis on the characteristics of channel-base... more This paper provides an in-depth investigation and analysis on the characteristics of channel-based transform waveforms and their differences from Fourier transform-based waveforms. Particularly, the basis functions of the recently proposed orthogonal transform division multiplexing (OTDM) waveform, which belongs to the category of channel-based transform waveforms, are comprehensively compared with the fixed exponential basis functions of orthogonal frequency division multiplexing (OFDM) waveform, which pertains to the class of Fourier transform-based waveforms. The obtained results show significant differences in the time and frequency characteristics of both classes of the waveforms. Also, the peak-to-average power ratio (PAPR) of OTDM is investigated and compared to OFDM. Then, a new effective technique, referred to as OTDM with edge subcarrier dedication (OTDM-ESD), is proposed for PAPR reduction by exploiting the special characteristics of the effective channel response in OTDM...

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Research paper thumbnail of A Novel Transceiver Architecture for Making Polar Codes Work Over Multipath Fading Channels as They Do Over AWGN Channels

Polar codes, recently accepted for adoption in 5G standard due to their excellent performance at ... more Polar codes, recently accepted for adoption in 5G standard due to their excellent performance at a very low complexity compared to other competitive schemes in the literature, are deemed to be a strong candidate for the Internet of Things (IoT) applications as well due to meeting their requirements. However, since polar codes construction is naturally channel-dependent, there has recently been an increasing interest in addressing the challenge of making polar codes work in realistic fading environments as they do in a binary symmetric channel (BSC). Recent studies on polar codes for fading channels have mainly focused on constructing new specific polar codes suitable to particular fading channels. This results in a non-universal code structure, leading to continuous changes in the code structure based on the channel, which is not desirable in practice. To address this problem, we develop and propose a novel transceiver architecture which enables using the polar coding design of a bi...

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Research paper thumbnail of Convolutional Neural Network Based Equalizer for Improving the Reliability Performance of OFDM with Subcarrier Power Modulation

RS Open Journal on Innovative Communication Technologies, 2021

As the demand for higher data rates has rapidly been increasing day after day, researchers around... more As the demand for higher data rates has rapidly been increasing day after day, researchers around the world have given serious attention and made significant efforts towards exploring new techniques that can improve the spectral efficiency of future wireless systems. Among these methods, the modulation technique named as orthogonal frequency division multiplexing with subcarrier power modulation (OFDM-SPM) is considered as a key potential candidate transmission method, which has the potential to effectively improve the per-user spectral efficiency of wireless networks. However, the reliability performance efficiency of OFDM-SPM is not that high, where it was found that the additional data stream conveyed by sub-carriers’ power has higher bit error rate (BER) performance compared to the data stream conveyed by conventional modulation schemes. To improve the reliability performance of OFDM-SPM furthermore, in this paper, we propose the use of Convolutional Neural Networks (CNN) based...

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Research paper thumbnail of Secure and Reliable IoT Communications Using Nonorthogonal Signals’ Superposition with Dual-Transmission

2020 IEEE 31st Annual International Symposium on Personal, Indoor and Mobile Radio Communications, 2020

Ensuring secure communication for internet of things (IoT) has drawn much attention because of th... more Ensuring secure communication for internet of things (IoT) has drawn much attention because of the limitation in the use of conventional cryptographic techniques owing to the unique features of IoT devices such as low complexity, lightweight computing, and power constraints. Physical layer security (PLS) has the potential to provide security solutions that are suitable for such applications. In this article, an efficient PLS approach is proposed for providing secure communication against external and internal eavesdroppers in a downlink multi-carrier IoT communication system. The system consists of a transmitter with a single active antenna (and a single radio frequency chain) that is trying to communicate with two single-antenna IoT devices in the presence of a passive eavesdropper. In the proposed algorithm, frequency selective channel based pre-coder matrices and dual-transmission approach are jointly employed to provide simple and secure communication without complex computation...

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