Space-time block codes in Doppler spread channel

Space-time block codes (STBC) can obtain full transmit diversity gain in a slow-fading environment. But it is not the case for STBC in a fast-fading channel where the estimator can not trace the channel variation instantaneously. This will cause decoding in error and hence the system performance is degraded. In this paper, we evaluate the performance degradation in a Doppler spread channel by computer simulation. Finally, we propose linear interpolation to trace the channel variation, and the performance can then be improved.