An adaptive asynchronous CDMA multiuser detector for frequency-selective Rayleigh fading channels

An adaptive asynchronous code-division multiple-access (CDMA) multiuser detector is proposed that uses a recently derived extended Kalman filter based algorithm [5] to perform joint data detection and parameter tracking in frequency-selective Rayleigh fading channels. A receiver structure based on this adaptive multiuser detector is presented and its performance in terms of parameter tracking and bit error rate (BER) is investigated. The receiver is a form of an adaptive RAKE that exploits multipaths to achieve performance gain. Index Terms--Bit error rate (BER), code-division multiple access (CDMA), extended Kalman filter (EKF), frequency-selective Rayleigh fading.