Steepest-Descent Channel Estimation Algorithm for MIMO-OFDMA Systems

This paper is to resolve the error floor for SUI-5 channel. Since the pilot allocation is solid, we canpsilat modify it exhaustively. So we combine the preamble and pilot carrier to resolve the problem. Here we introduce steepest descent algorithm combine preamble and pilot well for consult. Simulation result shows that novel algorithm can decrease the error floor for SUI_5 channel drastically and improve the performance for slow fading or fast fading channel. We also conclude that pilot only scheme exits error floor when the coherent bandwidth of channel is narrow, and preamble only scheme can decrease the error floor drastically when the coherent bandwidth of channel is narrow, however it canpsilat trace the fast fading channel.