改进参考信号的差分发送参考UWB自相关接收机

Differential transmitted reference UWB autocorrelation receiver based on modified reference signal

针对超宽带(UWB)差分发送参考(DTR)自相关接收机参考信号中含有的较强噪声分量严重影响了其性能的情况,提出了改进参考信号的差分发送参考(MRDTR)自相关接收机.首先通过将前一符号周期内各帧的接收信号相加取平均作为解调当前符号的参考信号,通过平均减少了参考信号中噪声的影响,然后将当前符号间隔内各帧的接收信号与参考信号进行相乘积分,随后将码元内各帧积分结果进行相加,最后通过判决恢复发送的符号.通过改进参考信号,改善了接收机的误比特率性能,并分析了该接收机在可分辨多径信道中的理论误比特率性能.理论分析和仿真结果证实MRDTR自相关接收机的误比特率性能明显优于DTR接收机.

Due to the serious impact of the noise component contained in reference signal on Differential Transmitted Reference（DTR） receiver＇s performance,the paper proposes the Modified Reference Differential Transmitted Reference（MRDTR） autocorrelation receiver for Impulse Radio Ultra-WideBand（IR-UWB） wireless communication systems.This receiver sums up the reference signals in every frame during the previous symbol interval and then averages them to form the new reference signal.The noise effect on the receiver performance is reduced by the average method.Then the received signals in each frame during the current symbol interval are multiplied with the new reference signal and the products are integrated.These integral results in every frame are summed up and the sum is decided to recover the transmitted symbol.The Bit Error Rate（BER） performance of the receiver is improved by constructing the new reference signal.Its BER performance is analyzed over resoluble multipath channel.Theoretic analysis and simulation results verify that the BER performance of the MRDTR receiver is superior to DTR receiver evidently.