基于独立分量分析的CDMA抗干扰时延估计算法

Study on anti-interference code delay estimated algorithms of CDMA based on ICA

基于独立分量分析的思想,采用经典的FastICA算法结合传统的匹配滤波检测技术实现对CDMA同步时延的精确估计,有效地抑制了多址干扰和远近效应对CDMA接收性能的影响。并针对多径干扰对时延精确提取的影响,提出了一种基于匹配滤波的多径干扰消除时延提取算法,有效地提高了时延精确提取的准确性。实验结果表明了算法的有效性。

The classical FastICA algorithm combined with the conventional match filtered technique implements the accurate code timing estimation of CDMA synchronization and effectively suppresses the influence of both MAI （multiple access interference） and the near far problems on the CDMA receiver performance. A multi-path interference cancellation algorithm based on match filtered techniques is proposed to enhance the veracity of accurate code timing extraction. The experiment results show the effectiveness of the algorithm.