自适应滤波在扩频信号分集接收中的应用研究

使用自适应滤波器完成对扩频信号的扩频码捕获后,传输信道中由于信号衰落造成的多径信号的幅度就可以从自适应滤波器收敛后的系数权值向量上体现出来.根据分集接收的理论分析,依据多径信号的信号幅度值进行分集接收在理论上是可行的,因此利用自适应滤波器对接收到的多径信号进行隐分集接收是完全可行的.使用自适应滤波器在完成扩频码捕获的同时,在不增加额外硬件支路的情况下就可以实现对多径信号的分集接收功能,从而改善在多径衰落环境下的信道传输性能.

Research on Diversity Reception in DS/SS Communication with Adaptive Filter

After DS/SS code acquisition with adaptive filter,the amplitudes of the multipath signals produced by fading channel were exhibited in the optimized adaptive filter coefficients.With these amplitudes of the signals,diversity reception was feasible in theory.The dormant diversity reception was used in multipath signals reception with adaptive filter.At the time of the acquisition of the DS/SS code with adaptive filter,the performance in multipath environment was improved without additional hardware channels to realize the diversity reception.