Blind adaptive distributed decorrelating detector for DS-CDMA systems

A blind adaptive distributed decorrelating detector is proposed for DS-CDMA system in both additive white Gaussian noise and fading channels in. this paper. It combines spatial diversity and decorrelating detection. The performance of decorrelating detector do not depend on the other users' energies and the other users' fading characteristics. The blind adaptive diversity-combining scheme based on stochastic gradient techniques is formulated using optimal likelihood ratio testing criterion, and its performance is evaluated in numerical examples, and compared with that of the other combining schemes. The proposed method is suitable for real-time implementation and can provide a significant receiver performance and system capacity gain.