Abstract
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 which are simultaneously transmitted using single transmit antennas for Turbo-SIMO system and n transmit antennas for Turbo-MISO and Turbo-MIMO system. The Rayleigh fading effected received signal at receive antenna is a linear superposition of the transmitted signals. It is observed that the Turbo-SISO system provides 45 dB coding gain, Turbo-SIMO system provides 27,20 and 17 dB coding gain for 2, 3 and 4 receive antenna respectively, Turbo-MISO system provides 26, 19 and 15 dB coding gain for 2, 3 and 4 transmit antenna respectively, Turbo-MIMO system provides 12 to 17 dB coding gain for different combination of transmit and receive antennas at a BER of 10-6 compared to uncoded SISO, SIMO, MISO and MIMO system.