【摘要】 将独立分量分析方法引入DS-CDMA系统,通过对DS-CDMA信号模型和线性有噪ICA模型的比较,得出这两种模型具有相同形式。因此,提出了一种基于ICA的DS-CDMA下行信道的延迟估计方法。该方法采用固定点ICA算法来估计多径信道的混合矩阵,从而提取信道的延迟信息。仿真结果表明:与匹配滤波检测方法相比,该方法具有更好的性能。更多还原

【Abstract】 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.更多还原