Fast-ICA Based Optimize Blind Estimation of Spreading Sequence of CDMA Signals
Fengbo Lu · Dianzi xuebao · 2012
Aiming at the segmentation-based method to estimate the spreading sequences of non-periodic long code(LPC) direct sequence spread spectrum(DS-SS) signal,this paper presents a Fast-ICA based method to estimate the spreading sequence of CDMA signals with optimize segmentation blindly,which on the base of the mathematical analysis of long-code CDMA signal.And then,the segmentation criterion different from current method,which as small as possible to cost the jumping probability,is given.The method is not only applicable for synchronous short-code single-or multi-user DSSS signals,but also adoptive to non-periodic long-code single-or multi-user DSSS signals.At the same time,an effective segmentation method is given in this paper,mathematic analysis and simulation results demonstrate the validity of these methods.