Mona Z . Saleh | Ain Shams University (original) (raw)

Papers by Mona Z . Saleh

Research paper thumbnail of ASCO-OFDM based VLC system throughput improvement using PAPR precoding reduction techniques

Optical and Quantum Electronics

The huge bandwidth and immunity to electromagnetic interference make visible light communication ... more The huge bandwidth and immunity to electromagnetic interference make visible light communication (VLC) systems the preferred technique for many applications. Unfortunately, the superposition of multiple subcarriers in VLC orthogonal frequency division multiplexing systems leads to a high peak-to-average power ratio (PAPR). So, in this study, we aim to reduce PAPR in VLC systems and improve the system performance by proposing non-distorting PAPR reduction techniques like precoding techniques as it doesn’t affect the system data rate because they do not require any obligatory transmission of side information. Moreover, it has a very good ability to reduce the PAPR without affecting the system BER performance. So, different precoding reduction techniques are proposed like discrete cosine transform (DCT), discrete sine transform (DST), discrete Hatley transform (DHT), and Vandermonde like matrix (VLM), to address the high PAPR and light-emitting diode-restricted linear range problems in...

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Improved Aggregated Rate for Optical Orthogonal Frequency Division Multiplexing (IARO-OFDM) for Intensity Modulated and Direct Detection of VLC Deployment over 6G Networks

2022 39th National Radio Science Conference (NRSC)

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Novel Unipolar Optical Modulation Techniques for Enhancing Visible Light Communication Systems Performance

IEEE Access

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Joint channel estimation for TDS-OFDM based on Superimposed Training

2017 14th International Conference on Telecommunications (ConTEL), 2017

One of the orthogonal frequency division multiplexing (OFDM) schemes is the Time Domain Synchrono... more One of the orthogonal frequency division multiplexing (OFDM) schemes is the Time Domain Synchronous OFDM (TDS-OFDM) scheme, in which, the guard intervals between consecutive OFDM symbols contain Pseudo Noise (PN) sequences which are known to the receiver and are used for channel estimation and synchronization. In this paper, a joint channel estimation algorithm is proposed for TDS-OFDM scheme, the proposed algorithm is based on using a Data-Dependent Superimposed Training (ST) sequence to improve the channel estimation accuracy in TDS-OFDM by utilizing two sources for channel estimation, the PN sequence at the guard interval and the ST sequence added to the data-dependent sequence. Furthermore, a simple linear combination algorithm is used to combine the two channel estimation results. The simulation results of the proposed algorithm show improvement in the estimation accuracy and bit error rate (BER) with little excess in the receiver complexity while, conserving same spectral effi...

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Controlled limited-exchange diffusion network model for cellular-based applications

IET Communications, 2018

In adaptive diffusion networks, one of the main challenges is the large volume of data exchange a... more In adaptive diffusion networks, one of the main challenges is the large volume of data exchange among nodes needed to arrive at a collective decision. In this study, a new model for adaptive diffusion networks is proposed which offers a tradeoff between the mean-square error performance of the system and the volume of data exchanged among network nodes while preserving the network convergence rate. Study of the mean-square stability of the network under the proposed algorithms is provided. Also, a study of the mean-error dynamic behaviour of the network is carried out. A closed-form expression for the overall network steady-state means-square error is derived and verified against simulated data. The proposed algorithm is applied to a cellular network location estimation problem, and delivers good performance even under 75% reduction in data exchange volume.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of A Transmitter Diversity Scheme for OFCDMA Systems Based on Space-Time Spreading with Iterative Detection Receiver

IET Communications, 2017

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Modified MIMO-OFDM Channel Estimation Technique for DVB-T2 Systems

2014 International Conference on Computational Intelligence and Communication Networks, 2014

ABSTRACT

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Novel hybrid soft-hard demodulation schemes for RQD constellation

2012 35th International Conference on Telecommunications and Signal Processing (TSP), 2012

ABSTRACT

Bookmarks Related papers MentionsView impact

Research paper thumbnail of A Comparative Study of Channel Estimation Techniques for OFDM in DVB-T2

International Journal of Computer Applications, 2014

Bookmarks Related papers MentionsView impact

Research paper thumbnail of An Improved Technique of Channel Estimation for OFDM in DVB-T2

International Journal of Computer Applications, 2014

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Fifth Generation promising integrated full loaded MIMO space‐time spreading‐aided‐orthogonal frequency code division multiple access system

IET Communications, 2018

Bookmarks Related papers MentionsView impact

Research paper thumbnail of A New Generation of OFCDMA Based on Innovative Integration Techniques

International Journal of Innovation, Management and Technology, 2018

Orthogonal Frequency Code Division Multiple Access (OFCDMA) system is one of the most promising m... more Orthogonal Frequency Code Division Multiple
Access (OFCDMA) system is one of the most promising
multi-user wireless communications systems. It outperforms
Orthogonal Frequency Division Multiplexing (OFDM) because
of the utilization of two dimensional (2D) spreading. This paper
proposes innovative integration techniques with OFCDMA
system for better data rate increase and Bit Error Rate (BER)
performance enhancement. The paper is divided into two parts;
integration techniques that target improvement in the downlink
transmission, and the other part targets the uplink transmission
improvement. In the downlink, the proposed system represents
an integration of Multiple–Input Multiple Output (MIMO) and
OFCDMA systems through the usage of Space Time Spreading
(STS) and OFCDMA. This exploits transmit diversity needed
for BER enhancing and data rate boosting. Further BER
improvement was achieved through applying an effective
Iterative Interference Cancellation (IIC) algorithm at the
receiver. In the uplink, A MIMO-OFCDMA system based on
new set of codes called Complete Complementary Codes (CCC)
is proposed. The authors present an analytical analysis for the
proposed systems performance in addition to simulation results.
The proposed systems attained better BER performance
compared to Single-Input Single-Output (SISO) OFCDMA
systems and the OFCDMA system that use the traditional codes.
The achieved BER performance was very close to Maximal
Ratio Receive Combining (MRRC) diversity system with 1Tx
and 4Rx. A considerable improvement was also obtained by
increasing the number of IIC iteration loops.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Channel estimation for MIMO-OFDM systems based on data nulling superimposed pilots

2017 21st Conference of Open Innovations Association (FRUCT), 2017

Bookmarks Related papers MentionsView impact

Research paper thumbnail of A modified hybrid RQD demapper based on novel hard to soft assigning algorithm

2013 7th International Conference on Application of Information and Communication Technologies, 2013

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Channel Estimation for MIMO-OFDM Systems Based on Data Nulling Superimposed Pilots

This paper proposes a new channel estimation algorithm based on data nulling superimposed pilots ... more This paper proposes a new channel estimation algorithm based on data nulling superimposed pilots for the spatial multiplexing multiple-input-multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) systems. In the proposed method each OFDM data symbol of each transmit antenna is spread over all subcarriers by using a spreading matrix then nulls are introduced at certain subcarriers to cancel the mutual interference between data symbols and superimposed pilots. At receiver accurate channel estimation can be easily acquired based on the superimposed pilots. Then the superimposed pilots are removed from the received signal and simple iterative data detection scheme is used to compensate the distortion which occurred in the data symbols. The simulation results of the proposed algorithm show improvement in the estimation accuracy, bit error rate (BER) and computational complexity compared to that of the conventional superimposed pilot technique. The simulation results also show that the performance of the proposed technique approaches that of the frequency division multiplexed pilots technique while having higher data rate and some excess in the receiver complexity.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Joint Channel Estimation for TDS-OFDM Based on Superimposed Training

One of the orthogonal frequency division multiplexing (OFDM) schemes is the Time Domain Synchrono... more One of the orthogonal frequency division multiplexing (OFDM) schemes is the Time Domain Synchronous OFDM (TDS-OFDM) scheme, in which, the guard intervals between consecutive OFDM symbols contain Pseudo Noise (PN) sequences which are known to the receiver and are used for channel estimation and synchronization. In this paper, a joint channel estimation algorithm is proposed for TDS-OFDM scheme, the proposed algorithm is based on using a Data-Dependent Superimposed Training (ST) sequence to improve the channel estimation accuracy in TDS-OFDM by utilizing two sources for channel estimation, the PN sequence at the guard interval and the ST sequence added to the data-dependent sequence. Furthermore, a simple linear combination algorithm is used to combine the two channel estimation results. The simulation results of the proposed algorithm show improvement in the estimation accuracy and bit error rate (BER) with little excess in the receiver complexity while, conserving same spectral efficiency as conventional TDS-OFDM scheme.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Modified MIMO-OFDM Channel Estimation Technique for DVB-T2 Systems

This paper proposes an enhanced pilot-aided channel estimation algorithm for the second generatio... more This paper proposes an enhanced pilot-aided channel estimation algorithm for the second generation of the digital video broadcast for terrestrial (DVB-T2) standard. Two channel estimation techniques are discussed; the first is based on the 3-points averaging technique, while the second is based on studying the frequency domain pattern of the channel response. The second technique leads to a 0.5 dB reduction in the SNR needed to guarantee a specific bit error rate (BER) requirement when compared to the conventional estimation technique recommended by the DVB-T2 implementation guide lines.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Novel Hybrid Soft-Hard Demodulation Schemes for RQD Constellation

Rotated constellation with Q-delay (RQD) is a new modulation scheme adopted by some wireless stan... more Rotated constellation with Q-delay (RQD) is a new modulation scheme adopted by some wireless standards including the second generation of the digital video broadcasting for terrestrial (DVB-T2) system. This scheme offers significant improvement over unrotated modulation in terms of bit error rate (BER) performance due to its signal space diversity. In this paper, we present four novel computationally efficient demodulation schemes with hybrid soft-hard outputs used in hard demapping of data. The main idea is to take advantage of the unique projections the rotated cells have in the RQD system. The proposed schemes reduce the number of log likelihood ratio (LLR) computations. One proposed scheme gives the same BER performance as traditional LLR while reducing the computational complexity by 34% at SNR = 20 dB. Another scheme reduces the computations by 25% independent of the SNR level. The other two schemes offer a tradeoff between computational complexity and power efficiency.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of A modified hybrid RQD demapper based on novel Hard to Soft Assigning algorithm

Rotated constellation with Q-Delay (RQD) is an innovative scheme that appeared to give better per... more Rotated constellation with Q-Delay (RQD) is an innovative scheme that appeared to give better performance compared to the traditional unrotated modulation. The bit error rate (BER) decreases due to the RQD scheme signal space diversity. The authors presented four novel computationally efficient demodulation schemes with hybrid soft-hard outputs in [1] that took advantage of the unique projections the rotated cells have in the RQD system. The Coded Modulation (CM) system can utilize the hybrid computationally efficient demodulation schemes for obtaining better results in terms of BER and computation complexity. One of the hybrid schemes was tested with Low Density Parity Check (LDPC) coder/decoder through two proposed hard to soft assigning algorithms (HSA). These algorithms assign estimated Log-Likelihood Ratio (LLR) values to the hard mapped bits, so that the LDPC decoder receives an all-soft stream. Numerical results show that HSA algorithms give better performance than the original all-soft stream at a moderate SNR range.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Channel Estimation for Pilot-Aided OFDM Systems Using V/H Approach

Orthogonal Frequency Division Multiplexing (OFDM) is one of the most widely used modulation techn... more Orthogonal Frequency Division Multiplexing (OFDM) is one of the most widely used modulation techniques in wireless communications field due to its robustness to Inter Symbol Interference (ISI), ease of implementation and high spectral efficiency. In this paper different pilot-aided channel estimation techniques based on various interpolation methods are studied. Estimation was performed on both OFDM symbol and OFDM frame (Vertical/Horizontal V/H) basis where the later one appears to give considerable better performance. The Digital Video Broadcasting for Handheld terminals/Terrestrial system (DVB-H/T) is selected as a case study with the TU6 mobile channel model.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of ASCO-OFDM based VLC system throughput improvement using PAPR precoding reduction techniques

Optical and Quantum Electronics

The huge bandwidth and immunity to electromagnetic interference make visible light communication ... more The huge bandwidth and immunity to electromagnetic interference make visible light communication (VLC) systems the preferred technique for many applications. Unfortunately, the superposition of multiple subcarriers in VLC orthogonal frequency division multiplexing systems leads to a high peak-to-average power ratio (PAPR). So, in this study, we aim to reduce PAPR in VLC systems and improve the system performance by proposing non-distorting PAPR reduction techniques like precoding techniques as it doesn’t affect the system data rate because they do not require any obligatory transmission of side information. Moreover, it has a very good ability to reduce the PAPR without affecting the system BER performance. So, different precoding reduction techniques are proposed like discrete cosine transform (DCT), discrete sine transform (DST), discrete Hatley transform (DHT), and Vandermonde like matrix (VLM), to address the high PAPR and light-emitting diode-restricted linear range problems in...

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Improved Aggregated Rate for Optical Orthogonal Frequency Division Multiplexing (IARO-OFDM) for Intensity Modulated and Direct Detection of VLC Deployment over 6G Networks

2022 39th National Radio Science Conference (NRSC)

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Novel Unipolar Optical Modulation Techniques for Enhancing Visible Light Communication Systems Performance

IEEE Access

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Joint channel estimation for TDS-OFDM based on Superimposed Training

2017 14th International Conference on Telecommunications (ConTEL), 2017

One of the orthogonal frequency division multiplexing (OFDM) schemes is the Time Domain Synchrono... more One of the orthogonal frequency division multiplexing (OFDM) schemes is the Time Domain Synchronous OFDM (TDS-OFDM) scheme, in which, the guard intervals between consecutive OFDM symbols contain Pseudo Noise (PN) sequences which are known to the receiver and are used for channel estimation and synchronization. In this paper, a joint channel estimation algorithm is proposed for TDS-OFDM scheme, the proposed algorithm is based on using a Data-Dependent Superimposed Training (ST) sequence to improve the channel estimation accuracy in TDS-OFDM by utilizing two sources for channel estimation, the PN sequence at the guard interval and the ST sequence added to the data-dependent sequence. Furthermore, a simple linear combination algorithm is used to combine the two channel estimation results. The simulation results of the proposed algorithm show improvement in the estimation accuracy and bit error rate (BER) with little excess in the receiver complexity while, conserving same spectral effi...

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Controlled limited-exchange diffusion network model for cellular-based applications

IET Communications, 2018

In adaptive diffusion networks, one of the main challenges is the large volume of data exchange a... more In adaptive diffusion networks, one of the main challenges is the large volume of data exchange among nodes needed to arrive at a collective decision. In this study, a new model for adaptive diffusion networks is proposed which offers a tradeoff between the mean-square error performance of the system and the volume of data exchanged among network nodes while preserving the network convergence rate. Study of the mean-square stability of the network under the proposed algorithms is provided. Also, a study of the mean-error dynamic behaviour of the network is carried out. A closed-form expression for the overall network steady-state means-square error is derived and verified against simulated data. The proposed algorithm is applied to a cellular network location estimation problem, and delivers good performance even under 75% reduction in data exchange volume.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of A Transmitter Diversity Scheme for OFCDMA Systems Based on Space-Time Spreading with Iterative Detection Receiver

IET Communications, 2017

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Modified MIMO-OFDM Channel Estimation Technique for DVB-T2 Systems

2014 International Conference on Computational Intelligence and Communication Networks, 2014

ABSTRACT

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Novel hybrid soft-hard demodulation schemes for RQD constellation

2012 35th International Conference on Telecommunications and Signal Processing (TSP), 2012

ABSTRACT

Bookmarks Related papers MentionsView impact

Research paper thumbnail of A Comparative Study of Channel Estimation Techniques for OFDM in DVB-T2

International Journal of Computer Applications, 2014

Bookmarks Related papers MentionsView impact

Research paper thumbnail of An Improved Technique of Channel Estimation for OFDM in DVB-T2

International Journal of Computer Applications, 2014

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Fifth Generation promising integrated full loaded MIMO space‐time spreading‐aided‐orthogonal frequency code division multiple access system

IET Communications, 2018

Bookmarks Related papers MentionsView impact

Research paper thumbnail of A New Generation of OFCDMA Based on Innovative Integration Techniques

International Journal of Innovation, Management and Technology, 2018

Orthogonal Frequency Code Division Multiple Access (OFCDMA) system is one of the most promising m... more Orthogonal Frequency Code Division Multiple
Access (OFCDMA) system is one of the most promising
multi-user wireless communications systems. It outperforms
Orthogonal Frequency Division Multiplexing (OFDM) because
of the utilization of two dimensional (2D) spreading. This paper
proposes innovative integration techniques with OFCDMA
system for better data rate increase and Bit Error Rate (BER)
performance enhancement. The paper is divided into two parts;
integration techniques that target improvement in the downlink
transmission, and the other part targets the uplink transmission
improvement. In the downlink, the proposed system represents
an integration of Multiple–Input Multiple Output (MIMO) and
OFCDMA systems through the usage of Space Time Spreading
(STS) and OFCDMA. This exploits transmit diversity needed
for BER enhancing and data rate boosting. Further BER
improvement was achieved through applying an effective
Iterative Interference Cancellation (IIC) algorithm at the
receiver. In the uplink, A MIMO-OFCDMA system based on
new set of codes called Complete Complementary Codes (CCC)
is proposed. The authors present an analytical analysis for the
proposed systems performance in addition to simulation results.
The proposed systems attained better BER performance
compared to Single-Input Single-Output (SISO) OFCDMA
systems and the OFCDMA system that use the traditional codes.
The achieved BER performance was very close to Maximal
Ratio Receive Combining (MRRC) diversity system with 1Tx
and 4Rx. A considerable improvement was also obtained by
increasing the number of IIC iteration loops.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Channel estimation for MIMO-OFDM systems based on data nulling superimposed pilots

2017 21st Conference of Open Innovations Association (FRUCT), 2017

Bookmarks Related papers MentionsView impact

Research paper thumbnail of A modified hybrid RQD demapper based on novel hard to soft assigning algorithm

2013 7th International Conference on Application of Information and Communication Technologies, 2013

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Channel Estimation for MIMO-OFDM Systems Based on Data Nulling Superimposed Pilots

This paper proposes a new channel estimation algorithm based on data nulling superimposed pilots ... more This paper proposes a new channel estimation algorithm based on data nulling superimposed pilots for the spatial multiplexing multiple-input-multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) systems. In the proposed method each OFDM data symbol of each transmit antenna is spread over all subcarriers by using a spreading matrix then nulls are introduced at certain subcarriers to cancel the mutual interference between data symbols and superimposed pilots. At receiver accurate channel estimation can be easily acquired based on the superimposed pilots. Then the superimposed pilots are removed from the received signal and simple iterative data detection scheme is used to compensate the distortion which occurred in the data symbols. The simulation results of the proposed algorithm show improvement in the estimation accuracy, bit error rate (BER) and computational complexity compared to that of the conventional superimposed pilot technique. The simulation results also show that the performance of the proposed technique approaches that of the frequency division multiplexed pilots technique while having higher data rate and some excess in the receiver complexity.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Joint Channel Estimation for TDS-OFDM Based on Superimposed Training

One of the orthogonal frequency division multiplexing (OFDM) schemes is the Time Domain Synchrono... more One of the orthogonal frequency division multiplexing (OFDM) schemes is the Time Domain Synchronous OFDM (TDS-OFDM) scheme, in which, the guard intervals between consecutive OFDM symbols contain Pseudo Noise (PN) sequences which are known to the receiver and are used for channel estimation and synchronization. In this paper, a joint channel estimation algorithm is proposed for TDS-OFDM scheme, the proposed algorithm is based on using a Data-Dependent Superimposed Training (ST) sequence to improve the channel estimation accuracy in TDS-OFDM by utilizing two sources for channel estimation, the PN sequence at the guard interval and the ST sequence added to the data-dependent sequence. Furthermore, a simple linear combination algorithm is used to combine the two channel estimation results. The simulation results of the proposed algorithm show improvement in the estimation accuracy and bit error rate (BER) with little excess in the receiver complexity while, conserving same spectral efficiency as conventional TDS-OFDM scheme.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Modified MIMO-OFDM Channel Estimation Technique for DVB-T2 Systems

This paper proposes an enhanced pilot-aided channel estimation algorithm for the second generatio... more This paper proposes an enhanced pilot-aided channel estimation algorithm for the second generation of the digital video broadcast for terrestrial (DVB-T2) standard. Two channel estimation techniques are discussed; the first is based on the 3-points averaging technique, while the second is based on studying the frequency domain pattern of the channel response. The second technique leads to a 0.5 dB reduction in the SNR needed to guarantee a specific bit error rate (BER) requirement when compared to the conventional estimation technique recommended by the DVB-T2 implementation guide lines.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Novel Hybrid Soft-Hard Demodulation Schemes for RQD Constellation

Rotated constellation with Q-delay (RQD) is a new modulation scheme adopted by some wireless stan... more Rotated constellation with Q-delay (RQD) is a new modulation scheme adopted by some wireless standards including the second generation of the digital video broadcasting for terrestrial (DVB-T2) system. This scheme offers significant improvement over unrotated modulation in terms of bit error rate (BER) performance due to its signal space diversity. In this paper, we present four novel computationally efficient demodulation schemes with hybrid soft-hard outputs used in hard demapping of data. The main idea is to take advantage of the unique projections the rotated cells have in the RQD system. The proposed schemes reduce the number of log likelihood ratio (LLR) computations. One proposed scheme gives the same BER performance as traditional LLR while reducing the computational complexity by 34% at SNR = 20 dB. Another scheme reduces the computations by 25% independent of the SNR level. The other two schemes offer a tradeoff between computational complexity and power efficiency.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of A modified hybrid RQD demapper based on novel Hard to Soft Assigning algorithm

Rotated constellation with Q-Delay (RQD) is an innovative scheme that appeared to give better per... more Rotated constellation with Q-Delay (RQD) is an innovative scheme that appeared to give better performance compared to the traditional unrotated modulation. The bit error rate (BER) decreases due to the RQD scheme signal space diversity. The authors presented four novel computationally efficient demodulation schemes with hybrid soft-hard outputs in [1] that took advantage of the unique projections the rotated cells have in the RQD system. The Coded Modulation (CM) system can utilize the hybrid computationally efficient demodulation schemes for obtaining better results in terms of BER and computation complexity. One of the hybrid schemes was tested with Low Density Parity Check (LDPC) coder/decoder through two proposed hard to soft assigning algorithms (HSA). These algorithms assign estimated Log-Likelihood Ratio (LLR) values to the hard mapped bits, so that the LDPC decoder receives an all-soft stream. Numerical results show that HSA algorithms give better performance than the original all-soft stream at a moderate SNR range.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Channel Estimation for Pilot-Aided OFDM Systems Using V/H Approach

Orthogonal Frequency Division Multiplexing (OFDM) is one of the most widely used modulation techn... more Orthogonal Frequency Division Multiplexing (OFDM) is one of the most widely used modulation techniques in wireless communications field due to its robustness to Inter Symbol Interference (ISI), ease of implementation and high spectral efficiency. In this paper different pilot-aided channel estimation techniques based on various interpolation methods are studied. Estimation was performed on both OFDM symbol and OFDM frame (Vertical/Horizontal V/H) basis where the later one appears to give considerable better performance. The Digital Video Broadcasting for Handheld terminals/Terrestrial system (DVB-H/T) is selected as a case study with the TU6 mobile channel model.

Bookmarks Related papers MentionsView impact