Volterra Based Receivers for Ds-Cdma
Rudolf Tanner, David G. M. Cruickshank · 2005
This paper presents a V olterra function based filter as the receiver for a direct-sequence-code-divisionmultiplex -access (DS-CDMA) system. The envisaged application would be cellular telephony, where the receiver will be required to be adaptive due to channel effects. The results obtained from the V olterra filter are compared against the linear minimum-meansquare -error (MMSE) filter and the nonlinear radialbasis -function (RBF) network in a stationary multipath channel. Further, the computational complexity will be investigated and compared against the MMSE. INTRODUCTION The demand for spread-spectrum (SS) communications and the introduction of new mobile systems, space and ground based, supports research in multiuser communications, particularly in DS-CDMA. To overcome multiuser interference (MAI), many receivers have been proposed, see [1, 2]. Most detectors for multiuser purpose are linear structures. Traditional solutions are based on matched filtering, with a RAKE structure ...