Space time block decoding in time-variant channels

This letter proposes a quadratic optimization decoding (QOD) for space-time block decoding in time-selective Rayleigh fading channels. When channels are fast fading, the simple decoding exploiting the orthogonal structure of the codes can not be used to achieve a proper error performance. In an effort to mitigate the severe performance degradation, in this letter least square decoding and QOD are considered for decoding. Simulation results show that the QOD shows a significant performance improvement compared to the least square and the conventional schemes.