ZP-OTFS系统信道估计的帧平均算法OA北大核心CSTPCD

In scenarios with high mobility,such as vehicle wireless communication and satellite communication,the orthogonal time frequency space(OTFS)modulation has the characteristics of adapting to fast time-varying wireless channels,which makes it one of the candidate technologies for 6G.In view of the high cost for pilot and guard symbols and the insufficient utilization of time-varying channel properties in the embedded-pilot(EP)channel estimation algorithm for zero padding-orthogonal time frequency space(ZP-OTFS)systems,a pilot embedded zero-symbol frame structure assisted frame-averaged channel estimation algorithm(FACEA)is proposed.The channel pre-estimation is performed by a joint threshold decision matrix based on delayed time domain signals,and the pre-estimated matrices of the consecutive multi-frame OTFS signal is averaged,so as to obtain the time domain channel matrix.The simulation results indicate that the algorithm surpasses the existing EP-assisted channel estimation algorithms in terms of performance under high-speed mobility scenarios for end users,and demonstrates better robustness in various fast time-varying channels.Therefore,the proposed algorithm realizes the optimal characteristics of channel estimation in a specific channel.