Delay Estimation Based on Independent Component Analysis in DS-CDMA Downlink
Wui Bei · Acta Simulata Systematica Sinica · 2005
Independent Component Analysis (ICA) techniques are considered in DS-CDMA communication system. Comparing the matrix CDMA signal model with the matrix noisy linear ICA model shows that it has the same form as the ICA model. Therefore, we propose a method of delay estimation in a block fading CDMA downlink based on ICA. The mixture matrix of multi-path channel can be estimated using a fast fixed-point algorithm, and then the delay information of channel can be obtained. The simulation results show that the proposed method has better performance compared with matched filter (MF) method.