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Multi-input multi-output (MIMO) based communication system architecture promises increased capacity and high data rates. Increase in the number of transmit antennas and using higher order complex modulation schemes achieves even higher performance but with exponentially increasing complexity at the receiver end. This paper explores the application of genetic algorithm (GA) for reducing complexity...
A low complexity multicarrier interleave division multiple access (MC-IDMA) system operating in multipath fading channels with adaptive subchannel allocation for uplink transmission is described. Instead of transmitting chips over a number of subchannels uniformly, chips are transmitted over subchannels which have largest fading amplitudes among all the subchannels. Concatenated Zigzag codes are used...
A new multiuser detection technique is proposed which is based on Gaussian approximation. The system uses conventional reverse link CDMA transmitter and a proposed receiver. In the receiver, the interference rejection block, known as Signal Reliability Estimator (SRE) and the decoder (DEC), exchange extrinsic information in an iterative manner. The system is analyzed in Rayleigh fading channels. It...
A new mulitcode multicarrier interleave division multiple access (MC-MC-IDMA) system is proposed and analyzed in frequency selective channels. The system supports different modulation schemes for variables data rates. Each user transmits his message by choosing a sequence from an orthogonal code-set. An MC-MC-IDMA system achieves spreading gains both in time and frequency domains. Bit error rate of...
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