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一种改进的宽带相干信号测向算法
引用本文:陈国通,王小娜.一种改进的宽带相干信号测向算法[J].河北工业科技,2018,35(4):237-241.
作者姓名:陈国通  王小娜
作者单位:河北科技大学信息科学与工程学院
基金项目:河北省科技支撑计划项目(18210803D)
摘    要:为了解决宽带独立信号和相干信号同时存在时,信号估计难度大和测向算法复杂的问题,设计了一种新的宽带相干信号测向算法。首先将未知信号进行分解,利用经典多重信号分类算法估计出独立信号的来波方向,然后利用已求出的独立信号信息,将独立信号从未知信号中剔除,只保留相干信号信息,最后利用改进的宽带相干信号测向算法进行相干信号估计。利用Matlab搭建仿真平台,对算法进行了仿真。结果表明,该算法去相关运算简单,可以有效地解决独立信号与相干信号同时存在的问题,提高了信号估计的成功率,并且减小了测向均方根误差,可为宽带测向的研究提供有价值的参考。

关 键 词:信号检测  均匀线阵  测向  聚焦算法  Matlab仿真  宽带测向  解相干
收稿时间:2017/12/13 0:00:00
修稿时间:2018/4/8 0:00:00

An improved direction finding algorithm of wideband coherent source
CHEN Guotong and WANG Xiaona.An improved direction finding algorithm of wideband coherent source[J].Hebei Journal of Industrial Science & Technology,2018,35(4):237-241.
Authors:CHEN Guotong and WANG Xiaona
Abstract:In order to solve problem that the broadband independent signal and the coherent signal coexist, it makes the signal more difficult to estimate and the direction finding algorithm being more complex, a new wideband coherent signal direction finding algorithm is proposed. Firstly, the unknown signals are separated, and the independent signal direction is estimated using classical multiple signal classification algorithm. Secondly, based on the obtained information of the independent signal, the independent signal is separated from the unknown signal, and only the coherent signal retains. Finally, the coherent signal is estimated with the improved direction finding algorithm of wideband coherent signal.A simulation platform is constructed by using Matlab to simulate the algorithm. The resuts show that the decorrelation calculation of the algorithm is simple, and can effectively solve the problem that independent and coherent wideband sources coexist. The algorithm can improve the success rate of coherent signal estimation and reduce the root mean square error of direction finding. The research result provides valuable reference for wideband direction finding.
Keywords:signal detection  uniform linear array  direction finding  focusing algorithm  Matlab simulation  wideband direction finding  decoherence
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