Fast tracking adaptive array system for mobile communications

Abstract

In slowly time-varying fading channels, adaptive diversity combining can reduce multipath fading of desired signal and suppress interfering signals. However, for fast time-varying fading channels, there are no effective techniques to achieve the same results. The continued use of decision directed adaptive array algorithms on the fast fading channels will cause error propagation. This paper presents a novel adaptive diversity combining technique with proposed M-D decoder and QRD-RLS based parallel weights tracking. This system reduces error propagation in the decision directed array systems while maintaining the same tracking speed. Computer simulation has been performed to show the effectiveness and much better performance than that of the existing techniques.