Performance Estimating for Space-Time Block Coded Cooperative Communication System

A new cooperative communication system based on space-time block coding (WCC-STBC) is proposed in this paper, and a closed-form expression of bit error rate for this WCC-STBC system is also deduced. The results through theoretical analysis and computer simulation show that the diversity gain, which is dependent on the characteristics of the user´s individual channel and the inter-user channel between them, could be obtained in the WCC-STBC system. When BER is 10^-3, and if the inter-user channel is 5 dB better than their individual´s, about 3 dB gain could be gotten in WCC-STBC system; and if one user´s channel is 5 dB better than his partner´s, 5 dB gain for the performance of the worse user could be improved while that of the better one is less loss, only about 0.5 dB or so