摘要
为了解决通信侦察中低信噪比下直扩信号PN序列的盲估计问题,分析了矩阵特征分解算法。该算法基于直扩通信的基带信号模型,以及已知直扩信号的伪码周期,通过对信号的自相关矩阵进行特征分解,获取最大特征值对应的特征向量,进而估计出PN序列。理论分析与仿真数值结果表明,该算法在较低信噪比背景环境中,能够准确地恢复出PN序列。
Aiming at blind estimation algorithm for PN sequence of DS signals in communication analyzes matrix eigenvalue decomposition algorithm. Based on DS signal models and according to period of PN eigenvalue decomposition of DS signals eovariauce matrix to get maximal eigenveetor, consequently estimates analysis and computer simulations show the algorithm has great efficiency. e at lower SINR, this paper code, this algorithm uses PN sequence. The theory
出处
《无线电工程》
2011年第8期15-17,共3页
Radio Engineering
关键词
矩阵特征分解
直接序列扩频
特征向量
伪随机序列
matrix eigenvalue decomposition
direct sequence spread spectrum
eigenvector
pseudo noise (PN) sequence