M Elnamaky - Academia.edu (original) (raw)

Papers by M Elnamaky

Research paper thumbnail of FPGA implementation for channel estimations based on wiener LMS for DS-CDMA

IEEE Workshop on Signal Processing Systems Design and Implementation, 2005.

Abstract — The estimation of channel delays along with their respective complex channel coefficie... more Abstract — The estimation of channel delays along with their respective complex channel coefficients of different users constitutes the first stage in the detection process at the receiving base station in a DS-CDMA communication system. A multiuser steepest Wiener LMS (MS-WLMS) like ...

Research paper thumbnail of Implementationof Space Time AdaptiveProcessing In Active SonarDetection

IOSR Journal of Electronics and Communication Engineering, 2014

Active SONAR involves the transmission of a short duration acoustic signal (called a ping), which... more Active SONAR involves the transmission of a short duration acoustic signal (called a ping), which when reflected from a target provides the SONAR receiver with a basis for detection and estimation. The challenge is to carry out detection in the presence of reverberation. All the literature available in this field points out that the computational burden of solving large equations for STAP in real time and significant performance loss due to limited amount of data available during a 'ping' stands forth as a stumbling block in active SONAR detection. Focus will be on simplifying the overall algorithm for STAP implementation. The Kronecker product of spatial and temporal matrices is carried out for the implementation of STAP. Polyphase FIR filter method is proposed to be handled so that hardware implementation of the STAP technology can be simplified.

Research paper thumbnail of Performance Evaluation of Standard IPACT for Future Long Reach Passive Optical Networks ( LR-PON )

Ethernet Passive Optical Networks (EPONs) have been regarded as one of the best choices for next ... more Ethernet Passive Optical Networks (EPONs) have been regarded as one of the best choices for next generation access networks. Many algorithms have been suggested to boost the efficiency of EPON. Interleaved Polling with Adaptive Cycle Time (IPACT) algorithm was one of the first solutions to dynamically allocate bandwidths. In this paper, modeling and simulation of Ethernet Passive Optical Networks (EPONs) have been developed using new Matlab Simulink tool SimEvents considering the IPACT algorithm as the dynamic bandwidth allocation (DBA) scheme. Models for low span area with moderate network load and long span area (Long-Reach PON) have been investigated. Simulation results show a consistent performance of the IPACT scheme. Results also show that the implementation of IPACT algorithm is not preferable for long span area (LR-PON).

Research paper thumbnail of Performance Evaluation of Standard IPACT for Future Long Reach Passive Optical Networks (LR-PON)

Ethernet Passive Optical Networks (EPONs) have been regarded as one of the best choices for next ... more Ethernet Passive Optical Networks (EPONs) have been regarded as one of the best choices for next generation access networks. Many algorithms have been suggested to boost the efficiency of EPON. Interleaved Polling with Adaptive Cycle Time (IPACT) algorithm was one of the first solutions to dynamically allocate bandwidths. In this paper, modeling and simulation of Ethernet Passive Optical Networks (EPONs) have been developed using new Matlab Simulink tool SimEvents considering the IPACT algorithm as the dynamic bandwidth allocation (DBA) scheme. Models for low span area with moderate network load and long span area (Long-Reach PON) have been investigated. Simulation results show a consistent performance of the IPACT scheme. Results also show that the implementation of IPACT algorithm is not preferable for long span area (LR-PON).

Research paper thumbnail of Performance Evaluation of Standard IPACT for Future Long Reach Passive Optical Networks (LR-PON)

Ethernet Passive Optical Networks (EPONs) have been regarded as one of the best choices for next ... more Ethernet Passive Optical Networks (EPONs) have been regarded as one of the best choices for next generation access networks. Many algorithms have been suggested to boost the efficiency of EPON. Interleaved Polling with Adaptive Cycle Time (IPACT) algorithm was one of the first solutions to dynamically allocate bandwidths. In this paper, modeling and simulation of Ethernet Passive Optical Networks (EPONs) have been developed using new Matlab Simulink tool SimEvents considering the IPACT algorithm as the dynamic bandwidth allocation (DBA) scheme. Models for low span area with moderate network load and long span area (Long-Reach PON) have been investigated. Simulation results show a consistent performance of the IPACT scheme. Results also show that the implementation of IPACT algorithm is not preferable for long span area (LR-PON).

Research paper thumbnail of Hardware implementation of digital beamforming network for Ultra Wide band signals using uniform linear arrays

The 2nd Middle East Conference on Antennas and Propagation, 2012

ABSTRACT This paper marks the first time in literature an attempt to realize the direct hardware ... more ABSTRACT This paper marks the first time in literature an attempt to realize the direct hardware implementation of Ultra Wide band (UWB) Digital Beam forming (DBF) in transmit and receive mode of UWB signals. A 1 GHz wide UWB signal is generated by a high speed arbitrary waveform generator (AWG) operating at 12 GS/s. The frequency band of interest was set to be 1GHz

Research paper thumbnail of Low complexity FPGA-implementation of a reconfigurable SIC multiuser detector for wireless applications

2010 4th International Conference on Signal Processing and Communication Systems, 2010

Abstract In this paper, we propose the low-complexity FPGA implementation of a reconfigurable suc... more Abstract In this paper, we propose the low-complexity FPGA implementation of a reconfigurable successive interference cancellation (SIC) detector for combating the effect of multiuser interference in wired/wireless systems. The complexity of various building blocks ...

Research paper thumbnail of FPGA implementation of correlation and ML channel estimation for long code CDMA systems

The estimation of channel delays along with their respective complex channel coefficients of diff... more The estimation of channel delays along with their respective complex channel coefficients of different users constitutes the first stage in the detection process at the receiving base station in a CDMA communication system. This stage forms the bottleneck for the detection of users' bit streams; both in terms of accuracy as well as execution time. In this paper, we address the problem of channel estimation in the complex scenario involving multiple users, multiple paths, and fading channels in CDMA systems. We will highlight a simple pipelined architecture for recursive channel estimators and describe the implementation issues related to the dominant type of operations, data flows, structure regularities, FPGA implementation and further figures to discuss the WCDMA real-time requirements in terms of processing capabilities..

Research paper thumbnail of FPGA implementation for channel estimations based on wiener LMS for DS-CDMA

IEEE Workshop on Signal Processing Systems Design and Implementation, 2005.

Abstract — The estimation of channel delays along with their respective complex channel coefficie... more Abstract — The estimation of channel delays along with their respective complex channel coefficients of different users constitutes the first stage in the detection process at the receiving base station in a DS-CDMA communication system. A multiuser steepest Wiener LMS (MS-WLMS) like ...

Research paper thumbnail of Implementationof Space Time AdaptiveProcessing In Active SonarDetection

IOSR Journal of Electronics and Communication Engineering, 2014

Active SONAR involves the transmission of a short duration acoustic signal (called a ping), which... more Active SONAR involves the transmission of a short duration acoustic signal (called a ping), which when reflected from a target provides the SONAR receiver with a basis for detection and estimation. The challenge is to carry out detection in the presence of reverberation. All the literature available in this field points out that the computational burden of solving large equations for STAP in real time and significant performance loss due to limited amount of data available during a 'ping' stands forth as a stumbling block in active SONAR detection. Focus will be on simplifying the overall algorithm for STAP implementation. The Kronecker product of spatial and temporal matrices is carried out for the implementation of STAP. Polyphase FIR filter method is proposed to be handled so that hardware implementation of the STAP technology can be simplified.

Research paper thumbnail of Performance Evaluation of Standard IPACT for Future Long Reach Passive Optical Networks ( LR-PON )

Ethernet Passive Optical Networks (EPONs) have been regarded as one of the best choices for next ... more Ethernet Passive Optical Networks (EPONs) have been regarded as one of the best choices for next generation access networks. Many algorithms have been suggested to boost the efficiency of EPON. Interleaved Polling with Adaptive Cycle Time (IPACT) algorithm was one of the first solutions to dynamically allocate bandwidths. In this paper, modeling and simulation of Ethernet Passive Optical Networks (EPONs) have been developed using new Matlab Simulink tool SimEvents considering the IPACT algorithm as the dynamic bandwidth allocation (DBA) scheme. Models for low span area with moderate network load and long span area (Long-Reach PON) have been investigated. Simulation results show a consistent performance of the IPACT scheme. Results also show that the implementation of IPACT algorithm is not preferable for long span area (LR-PON).

Research paper thumbnail of Performance Evaluation of Standard IPACT for Future Long Reach Passive Optical Networks (LR-PON)

Ethernet Passive Optical Networks (EPONs) have been regarded as one of the best choices for next ... more Ethernet Passive Optical Networks (EPONs) have been regarded as one of the best choices for next generation access networks. Many algorithms have been suggested to boost the efficiency of EPON. Interleaved Polling with Adaptive Cycle Time (IPACT) algorithm was one of the first solutions to dynamically allocate bandwidths. In this paper, modeling and simulation of Ethernet Passive Optical Networks (EPONs) have been developed using new Matlab Simulink tool SimEvents considering the IPACT algorithm as the dynamic bandwidth allocation (DBA) scheme. Models for low span area with moderate network load and long span area (Long-Reach PON) have been investigated. Simulation results show a consistent performance of the IPACT scheme. Results also show that the implementation of IPACT algorithm is not preferable for long span area (LR-PON).

Research paper thumbnail of Performance Evaluation of Standard IPACT for Future Long Reach Passive Optical Networks (LR-PON)

Ethernet Passive Optical Networks (EPONs) have been regarded as one of the best choices for next ... more Ethernet Passive Optical Networks (EPONs) have been regarded as one of the best choices for next generation access networks. Many algorithms have been suggested to boost the efficiency of EPON. Interleaved Polling with Adaptive Cycle Time (IPACT) algorithm was one of the first solutions to dynamically allocate bandwidths. In this paper, modeling and simulation of Ethernet Passive Optical Networks (EPONs) have been developed using new Matlab Simulink tool SimEvents considering the IPACT algorithm as the dynamic bandwidth allocation (DBA) scheme. Models for low span area with moderate network load and long span area (Long-Reach PON) have been investigated. Simulation results show a consistent performance of the IPACT scheme. Results also show that the implementation of IPACT algorithm is not preferable for long span area (LR-PON).

Research paper thumbnail of Hardware implementation of digital beamforming network for Ultra Wide band signals using uniform linear arrays

The 2nd Middle East Conference on Antennas and Propagation, 2012

ABSTRACT This paper marks the first time in literature an attempt to realize the direct hardware ... more ABSTRACT This paper marks the first time in literature an attempt to realize the direct hardware implementation of Ultra Wide band (UWB) Digital Beam forming (DBF) in transmit and receive mode of UWB signals. A 1 GHz wide UWB signal is generated by a high speed arbitrary waveform generator (AWG) operating at 12 GS/s. The frequency band of interest was set to be 1GHz

Research paper thumbnail of Low complexity FPGA-implementation of a reconfigurable SIC multiuser detector for wireless applications

2010 4th International Conference on Signal Processing and Communication Systems, 2010

Abstract In this paper, we propose the low-complexity FPGA implementation of a reconfigurable suc... more Abstract In this paper, we propose the low-complexity FPGA implementation of a reconfigurable successive interference cancellation (SIC) detector for combating the effect of multiuser interference in wired/wireless systems. The complexity of various building blocks ...

Research paper thumbnail of FPGA implementation of correlation and ML channel estimation for long code CDMA systems

The estimation of channel delays along with their respective complex channel coefficients of diff... more The estimation of channel delays along with their respective complex channel coefficients of different users constitutes the first stage in the detection process at the receiving base station in a CDMA communication system. This stage forms the bottleneck for the detection of users' bit streams; both in terms of accuracy as well as execution time. In this paper, we address the problem of channel estimation in the complex scenario involving multiple users, multiple paths, and fading channels in CDMA systems. We will highlight a simple pipelined architecture for recursive channel estimators and describe the implementation issues related to the dominant type of operations, data flows, structure regularities, FPGA implementation and further figures to discuss the WCDMA real-time requirements in terms of processing capabilities..