基于矩阵变换法的DSSS信号盲估计

Blind Estimation of the DSSS Signals Using Matrix Transform

提出一种基于矩阵变换法的简便盲估计算法.此算法在已知PN码速率及PN码周期已知的情况下,对基带扩频信号进行分段处理和累加运算以消除噪声的影响,进而实现PN码的盲估计,并在此基础上分析了使用不同m序列作扩频序列时的系统性能.Matlab仿真结果表明此算法可以在SNR低于-18dB的环境下正常工作.

A simple blind estimate algorithm is propesed based on matrix transform. The chip rate of the PN code and PN code period must be known. The received signals are divided into vectors to deal with and cumulate to eliminate the effect of noise and estimate the PN code. The system performances which use different m sequences have been analyzed. The Matlab simulation results show that this algorithm can work well on SNR below - 18dB.