一种载波频率未知的扩频序列盲估计算法

Abstract

提出一种载波频率未知情况下，利用主分量分析法盲估计直接扩频序列的算法。算法把接收到的信号投影到扩频码所在向量域，通过搜索投影向量的特征值，可以在没有载波频率、信道先验信息的情况下，估计得到扩频序列和载波频率。理论和仿真结果表明了算法的有效性。 This paper propose a new method to blind estimation m-sequence in DS-CDMA signals without the informa- tion of carry frequency. A new model was built and the m-sequence can be blindly estimated by PCA in this model. The carry frequency can also be got. Analytical and simulated results show that the proposed method has a good perfor- mance.