直接序列扩频信号伪码速率盲估计

Method of DS/SS signals chip-rate blindly estimation

针对直接序列扩频通信信号的侦察问题,充分利用扩频基带信号发送成型滤波后的波形特点,提出了一种基于最大平均功率序列的算法。该算法首先计算序列的平均功率,然后对其进行谱分析并作平滑处理而完成伪码速率的判定。计算机仿真实验及实际应用证明了该算法在较低的信噪比条件下具有良好的工作性能。

Aiming at the problem of intercepting the direct sequence spread spectrum communication signal, this paper makes full use of the wave characteristic of base-band signal after it is applied to shaping filter is made, and an algorithm which is based on the average power serial is given. This algorithm firstly calculates the average power serial, and then finishes the detection of PN code rate through the analysis of frequency spectrum and smooth processing. The computer simulation and practical application can justify the effectiveness and reliability of this algorithm in low SNR.