Diversity transmission and adaptive MLSE for digital cellular radio

Adaptive equalization at the mobile in conjunction with diversity transmiss ion at the base station can combat the adverse effects of both frequency-se lective and frequency nonselective fading at the mobile receiver. This is s uggested as an alternative to diversity combining at the mobile. Thus? a su bstantial saving in the mobile receiver's implementation cost and power con sumption is expected. In this paper, a time-domain multiple access system w ith two transmitting antennas at the base station and maximum-likelihood se quence estimation at the mobile is considered. Per-survivor processing (PSP ), a combined channel-tracking and sequence-estimation algorithm, has been used far improving the system performance. System performance results in th e presence of severe Doppler frequency shifts and additive white Gaussian n oise in a hat fading channel are presented. The computational complexity an d acquisition capabilities of the PSP algorithm are also presented.