针对短波信号传输过程中的多径问题，利用RAKE接收机算法和自相关信号的特征，通过信道估计、信道评估、多径筛选和组合的方法，对自相关信号进行解调。通过仿真，在多径效应影响下，处理3 径信号能使信号的解调成功率上升18%。

This thesis analyzes the demodulation of autocorrelation signal aiming at short wave multipath effect，with RAKE receiver algorithm and characteristics of autocorrelation signals，the autocorrelation signal is demodulated by channel estimation, channel evaluation, multipath filtering and grouping. Simulation show that the processing of 3 - path signals can increase the demodulation success rate by 18%.