Blind real-time low-complexity receivers for DS-CDMA mobile users

A new blind linear-filter receiver is proposed for the detection of DS-CDMA users in unknown multi-user interference and additive white Gaussian noise. The proposed receiver is motivated by the Wiener reconstruction-filter theory and it is a minimum-variance-distortionless-response-type filter that maximizes the output signal-to-interference-plus-noise-ratio. The receiver is randomized with input driven realizations and parametrized with respect to only a single scalar parameter. The batch solution for the single scalar tuning parameter is simple and requires no matrix inversion, while adaptive alternatives are fast, low-complexity, strongly consistent stochastic approximation recursions on R