自适应Notch滤波器四元平面方阵定向性能  

Directional Performance of Four-cell-square-array in Plane Decided by Adaptive Notch Filter

作　　者：周倩[1] 申晓红[1] 张颖峰[1] 

机构地区：[1]西北工业大学航海学院,陕西西安710072

出　　处：《计算机仿真》2009年第9期346-349,共4页Computer Simulation

基　　金：基于水雷尺度两点特征的检测技术研究(06J4.5.1)

摘　　要：为了提高四元平面方阵定向性能,减小其运算量,提出了用自适应Notch滤波器相位差时延估计法进行定向。方法可以动态更新参考信号频率,减小估计方差并实现无偏估计,是实现目标定向的重要途径。与通常所用的互谱法相比,在相位估计方差下界相同时,运算量显著减小。将其应用于四元平面方阵的定向,对水下主动发射信号的回波进行仿真分析,仿真结果表明,在相同的实验条件与精确度下,运算量比通常定向所用的互谱法小,有很强的工程应用价值。To improve the directional performance of four - cell - square - array in plane, decrease its operation cost, a new method is put forward. Adaptive Notch filter phase - difference time delay estimation method can dynamically update reference signal frequency, decrease estimate variance and realize unbiased estimate, which is an important approach to realize target direction. Compared with cross - spectra, when phase estimate variance lower bound is the same, its cost is dramatically reduced. This method is used in the direction of four - cell - square - array to analyze the echo of initiative transmitting signals. The results show that when the experiment condition and definition are the same, compared with cross -spectra, its eost is reduced, ean be conveniently used in engineering.

关 键 词：四元平面方阵 相位差 互谱法 运算量 

分 类 号：TN912[电子电信—通信与信息系统]