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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 estimation algorithm based on matrix transformation is proposed.It is based on the known PN code rate and the PN code period is known to segment the baseband spread spectrum signal and the cumulative operation to eliminate the noise impact, And realize the blind estimation of the PN code.Based on this analysis, the system performance when different m sequences are used for spreading sequences is analyzed.The Matlab simulation results show that the algorithm can work normally under the SNR lower than -18dB.