判决反馈平均的UWB自相关接收机

UWB Autocorrelation Receiver Based on Decision Feedback Average

利用已判决符号和它们相应的接收信号构造解调用的模板信号,给出一种基于判决反馈平均的UWB自相关接收机结构,分析该接收机在可分辨多径信道中的理论误码率性能,给出误码率较低时的性能上界。仿真结果表明,判决反馈平均自相关接收机的性能明显优于传统发送参考、差分发送参考和平均发送参考自相关接收机,且判决反馈平均自相关接收机可以通过增加反馈符号数来改善其性能。

This paper utilizes the decided symbols and their corresponding received signals to devise a reference signal for demodulation, and presents a structure of UWB autocorrelation receiver based on the decision feedback average （DFA）. Theoretical performance of DFA autocorrelation receiver is analyzed in a resolvable multipath channel. Its upper bound is given for low bit error rate （BER）. Simulation results verify that the performance of DFA autocorrelation receiver is superior to autocorrelation receivers with conventional transmitted reference, differential transmitted reference, and average transmitted reference. The DFA autocorrelation receiver can be improved by increasing the number of feedback symbols.