A Null-Steering Adaptive Antenna Array for CDMA Mobile Stations

Abstract

A local virtual signal tuned (VST) null-steering adaptive antenna array applied to a CDMA mobile station is proposed in this paper. The proposed adaptive array detects the spatial signature of incident signals and generates local uncorrelated virtual signals based on the spatial signature to control the array weights in order to form the required array radiation pattern. The proposed array can control its radiation pattern very flexibly since it is tuned by local virtual signals instead of received signal. Lab and field measurements show that the proposed adaptive array has a better performance than a conventional post-despread architecture adaptive array.