M. M. Kamruzzaman

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This paper compares the performance of a Turbo coded wireless link for SISO, SIMO, MISO and MIMO system with uncoded wireless link for SISO, SIMO, MISO and MIMO system in the presence of ray Leigh fading. Turbo encoder encodes the input information bits and sends to 64 QAM modulator. Modulated symbols are mapped by STBC. Outputs of STBC split into n streams(More)
In this paper, performance of relay assisted wireless link is evaluated in the presence of rayleigh fading where mobile handset is equipped with single transmit antenna, relay is equipped with multiple transmit and receive antennas, and destination has multiple receive antennas. Data are modulated using QPSK or 16 QAM or 64 QAM modulator at handset and send(More)
In this paper, performance of a Turbo coded wireless link is evaluated in the presence of Rayleigh fading for single transmit antenna and multiple receive antennas system using selective combining, equal gain combing and maximal ratio combining. Data are encoded using turbo encoder then modulated by QPSK or 16 QAM or 64 QAM before transmitting. And at the(More)
This paper investigates the effect on performance for placing a decode and forward MIMO relay at different position between source and destination for wireless uplink in the presence of rayleigh fading where source is equipped with single transmit antenna, relay is equipped with multiple transmit and receive antennas, and destination has multiple receive(More)
In this paper, performance of STBC, VBLAST, MLSTBC and Hybrid-STBC-VBLAST is investigated in the presence of rayleigh fading for relay assisted multiple access communication. STBC provides diversity gain but does not provide multiplexing gain. On the other hand, VBLAST provides multiplexing gain but does not provide diversity gain. But combination of STBC(More)
—This paper compares the performance of a decode and forward relay assisted wireless uplink with direct wireless uplink in the presence of rayleigh fading where source is equipped with single transmit antenna (Tx), relay is equipped with multiple transmit and receive antennas (Rx), and destination has multiple receive antennas. Data are modulated using QPSK(More)
In this paper, performance of a Turbo coded OFDM wireless link is evaluated in the presence of Rayleigh fading for SISO, SIMO, MISO and MIMO system. Data are encoded using turbo encoder then modulated by QPSK or 16 QAM or 64 QAM and further encoded using STBC, and the encoded data are split into n streams which are modulated by OFDM and simultaneously(More)
This paper compares the performance of single user and multiuser with Walsh Hadamard spreading sequences for relay assisted wireless link as well as direct link. Space Time Block Coding (STBC) is used for encoding the information at user's handset and relay. Input information are mapped using Walsh Hadamard spreading sequences and send to a QPSK or 16 QAM(More)