dia Ali - Academia.edu (original) (raw)

Papers by dia Ali

Journal of Communications

The new product of wireless communication systems, the Fifth generation (5G), promises higher dat... more The new product of wireless communication systems, the Fifth generation (5G), promises higher data rates and Spectrum Efficiency (SE) enhancements to support the communication of heterogeneous services. The Filtered-OFDM (F-OFDM) technique was proposed as the strongest candidate waveform for the physical layer in 5G to fulfill these requirements. In F-OFDM, the whole band is split into narrow sub-bands, each filtered by a digital Finite Impulse Response (FIR) filter with different specifications to increase the spectrum utilization and allow for asynchronous transmission. This paper proposes a novel F-OFDM design waveform for the first time with four sub-bands in equal and unequal sub-band sizes of seven kinds of window sinc filters and a variety of numerology designs to observe SE enhancement using Matlab-Simulink Software. Simulation results show that F-OFDM can reduce Out-Of-Band Emission (OOBE) and achieve SE of about (5%-6%) higher than conventional OFDM for equal and unequal s...

ABSTRACT The Network Systems (NS) depend essentially on the packet features (header fields and pa... more ABSTRACT The Network Systems (NS) depend essentially on the packet features (header fields and payload) in their work that include packet analyses and filtering. Routers, bridges and network security systems need to extract the features of the packet to do their jobs, for that, the Packet Features Extractor (PFE) is one of the most important parts in the on-line NS and it is the absent step that through it, the off-line NS can be developed to on-line systems. In this paper, a PFE is designed to develop an off-line Intrusion Detection System (IDS) to be an on-line system. The designing is based on extract 12 NSL-KDD features from the packet. The 12 features are the same features that the off-line IDS was designed based on it. The PFE drove the on-line IDS with same result that was the off-line IDS giving it with average detection rate 94.9%. The PFE with the new on-line IDS are implemented on Real Time Operation System (RTOS) that was created for this issue. The implementation of the system gave a high performance results and throughput reached 100Mbps that limited by the Network Interface Card (NIC) and it can be over that if a gigabit NIC is used. Four models are implemented and the results show that the average of the throughput saturated with convergence values for the four deferent models that simpler than the PFE and the values reach the end of the NIC limit which about 100Mbps. The system task (PFE over TCP communication) take about (0.65 micro sec) as average Task Execution Time (TET). In the rest of the paper, a study for the NSL- features reduction is produced.

Proceedings of Engineering and Technology Innovation, 2021

Filtered-orthogonal frequency division multiplexing (F-OFDM) is a quasi-orthogonal waveform candi... more Filtered-orthogonal frequency division multiplexing (F-OFDM) is a quasi-orthogonal waveform candidate for the applications of the fifth generation (5G) communication system. In this study, an F-OFDM waveform with unequal sub-band sizes is proposed to improve the spectrum efficiency (SE) of the 5G system. The proposed waveform is modeled with the Blackman window-sinc filter and is developed based on the software-defined radio (SDR) technology for practical implementation. The result shows that the F-OFDM performance of the simulation and hardware implementation is approximately the same. The SE using the proposed F-OFDM waveform is 6% and 5.8% higher than the SE using the conventional OFDM waveform under the simulation in the LabVIEW NXG simulator and under the practical use in the universal software radio peripheral (USRP) platform, respectively.

2019 International Conference on Computing and Information Science and Technology and Their Applications (ICCISTA), 2019

The growing share of renewable energy makes the optimization of power flows in power system model... more The growing share of renewable energy makes the optimization of power flows in power system models computationally more complicated, due to the widely distributed weather-dependent electricity generation. This article evaluates two methods to reduce the temporal complexity of a power transmission grid model with storage expansion planning. The goal of the reduction techniques is to accelerate the computation of the linear optimal power flow of the grid model. This is achieved by choosing a small number of representative time periods to represent one whole year. To select representative time periods, a hierarchical clustering is used to aggregate either adjacent hours chronologically or independently distributed coupling days into clusters of time series. The aggregation efficiency is evaluated by means of the error of the objective value and the computational time reduction. Further, both the influence of the network size and the efficiency of parallel computation in the optimization process are analysed. As a test case, the transmission grid of the northernmost German federal state of Schleswig-Holstein with a scenario corresponding to the year 2035 is considered. The considered scenario is characterized by a high share of installed renewables.

ABSTRACT Real-Time system is the base for many applications today. Whatever the designed system i... more ABSTRACT Real-Time system is the base for many applications today. Whatever the designed system is a high accuracy and flexibly, it still not efficient unless be a real-time with the overall system. In this paper a real-time Operation System (OS) is created based on xPC Target Kernel. xPC gives the ability to convert a designed model to a real-time OS. Two models are built, Target-Host transmission using UDP and Spectrum Analyzer, and implemented separately on the created OS. The first model to test the ability of the created OS when dealing with network systems, the second to test the ability of dealing with High Speed Systems and Analyzing units. There result show that the created OS is very efficient and give short average Task Execution Time (TET) equal to (0.636 micro sec) for the first model and (0.3117 micro sec) for the second model and it shows that it can easily communicate with other systems.

American Journal of Electrical and Electronic Engineering, 2014

Due to the rapid acceleration and evolution of the wireless communication and their equipment, in... more Due to the rapid acceleration and evolution of the wireless communication and their equipment, integrating more services in the personal devices, Personal Digital Assistance (PDA) devices has to work in multiband frequencies. In this paper, a quad-band, dual-layer Microstrip Antenna was proposed. The proposed antenna is suggested to be used in a mobile phone handset that covers four frequency bands which include GSM 900 (889-960),

2019 International Conference on Computing and Information Science and Technology and Their Applications (ICCISTA), 2019

Journal of Communications

The new product of wireless communication systems, the Fifth generation (5G), promises higher dat... more The new product of wireless communication systems, the Fifth generation (5G), promises higher data rates and Spectrum Efficiency (SE) enhancements to support the communication of heterogeneous services. The Filtered-OFDM (F-OFDM) technique was proposed as the strongest candidate waveform for the physical layer in 5G to fulfill these requirements. In F-OFDM, the whole band is split into narrow sub-bands, each filtered by a digital Finite Impulse Response (FIR) filter with different specifications to increase the spectrum utilization and allow for asynchronous transmission. This paper proposes a novel F-OFDM design waveform for the first time with four sub-bands in equal and unequal sub-band sizes of seven kinds of window sinc filters and a variety of numerology designs to observe SE enhancement using Matlab-Simulink Software. Simulation results show that F-OFDM can reduce Out-Of-Band Emission (OOBE) and achieve SE of about (5%-6%) higher than conventional OFDM for equal and unequal s...

ABSTRACT The Network Systems (NS) depend essentially on the packet features (header fields and pa... more ABSTRACT The Network Systems (NS) depend essentially on the packet features (header fields and payload) in their work that include packet analyses and filtering. Routers, bridges and network security systems need to extract the features of the packet to do their jobs, for that, the Packet Features Extractor (PFE) is one of the most important parts in the on-line NS and it is the absent step that through it, the off-line NS can be developed to on-line systems. In this paper, a PFE is designed to develop an off-line Intrusion Detection System (IDS) to be an on-line system. The designing is based on extract 12 NSL-KDD features from the packet. The 12 features are the same features that the off-line IDS was designed based on it. The PFE drove the on-line IDS with same result that was the off-line IDS giving it with average detection rate 94.9%. The PFE with the new on-line IDS are implemented on Real Time Operation System (RTOS) that was created for this issue. The implementation of the system gave a high performance results and throughput reached 100Mbps that limited by the Network Interface Card (NIC) and it can be over that if a gigabit NIC is used. Four models are implemented and the results show that the average of the throughput saturated with convergence values for the four deferent models that simpler than the PFE and the values reach the end of the NIC limit which about 100Mbps. The system task (PFE over TCP communication) take about (0.65 micro sec) as average Task Execution Time (TET). In the rest of the paper, a study for the NSL- features reduction is produced.

Proceedings of Engineering and Technology Innovation, 2021

Filtered-orthogonal frequency division multiplexing (F-OFDM) is a quasi-orthogonal waveform candi... more Filtered-orthogonal frequency division multiplexing (F-OFDM) is a quasi-orthogonal waveform candidate for the applications of the fifth generation (5G) communication system. In this study, an F-OFDM waveform with unequal sub-band sizes is proposed to improve the spectrum efficiency (SE) of the 5G system. The proposed waveform is modeled with the Blackman window-sinc filter and is developed based on the software-defined radio (SDR) technology for practical implementation. The result shows that the F-OFDM performance of the simulation and hardware implementation is approximately the same. The SE using the proposed F-OFDM waveform is 6% and 5.8% higher than the SE using the conventional OFDM waveform under the simulation in the LabVIEW NXG simulator and under the practical use in the universal software radio peripheral (USRP) platform, respectively.

2019 International Conference on Computing and Information Science and Technology and Their Applications (ICCISTA), 2019

The growing share of renewable energy makes the optimization of power flows in power system model... more The growing share of renewable energy makes the optimization of power flows in power system models computationally more complicated, due to the widely distributed weather-dependent electricity generation. This article evaluates two methods to reduce the temporal complexity of a power transmission grid model with storage expansion planning. The goal of the reduction techniques is to accelerate the computation of the linear optimal power flow of the grid model. This is achieved by choosing a small number of representative time periods to represent one whole year. To select representative time periods, a hierarchical clustering is used to aggregate either adjacent hours chronologically or independently distributed coupling days into clusters of time series. The aggregation efficiency is evaluated by means of the error of the objective value and the computational time reduction. Further, both the influence of the network size and the efficiency of parallel computation in the optimization process are analysed. As a test case, the transmission grid of the northernmost German federal state of Schleswig-Holstein with a scenario corresponding to the year 2035 is considered. The considered scenario is characterized by a high share of installed renewables.

ABSTRACT Real-Time system is the base for many applications today. Whatever the designed system i... more ABSTRACT Real-Time system is the base for many applications today. Whatever the designed system is a high accuracy and flexibly, it still not efficient unless be a real-time with the overall system. In this paper a real-time Operation System (OS) is created based on xPC Target Kernel. xPC gives the ability to convert a designed model to a real-time OS. Two models are built, Target-Host transmission using UDP and Spectrum Analyzer, and implemented separately on the created OS. The first model to test the ability of the created OS when dealing with network systems, the second to test the ability of dealing with High Speed Systems and Analyzing units. There result show that the created OS is very efficient and give short average Task Execution Time (TET) equal to (0.636 micro sec) for the first model and (0.3117 micro sec) for the second model and it shows that it can easily communicate with other systems.

American Journal of Electrical and Electronic Engineering, 2014

Due to the rapid acceleration and evolution of the wireless communication and their equipment, in... more Due to the rapid acceleration and evolution of the wireless communication and their equipment, integrating more services in the personal devices, Personal Digital Assistance (PDA) devices has to work in multiband frequencies. In this paper, a quad-band, dual-layer Microstrip Antenna was proposed. The proposed antenna is suggested to be used in a mobile phone handset that covers four frequency bands which include GSM 900 (889-960),

2019 International Conference on Computing and Information Science and Technology and Their Applications (ICCISTA), 2019