有色噪声下的MUSIC抗干扰算法  

MUSIC anti-jamming algorithm with colored noise

作　　者：祝兆文 郎荣玲[1] ZHU Zhaowen;LANG Rongling(School of Electronic Information Engineering,Beihang University,Beijing 100191,China)

机构地区：[1]北京航空航天大学电子信息工程学院,北京100191

出　　处：《导航定位学报》2022年第3期45-52,共8页Journal of Navigation and Positioning

摘　　要：多重信号分类(MUSIC)算法的前提条件为噪声是零均值的高斯白噪声。在实际应用中,由于滤波器的通带范围等器件因素,噪声往往是有色噪声。以卫星导航抗干扰应用为背景,针对有色噪声条件,采用对角加载技术改进了MUSIC抗干扰算法。首先通过理论推导和仿真实验,分析了有色噪声条件对MUSIC算法的影响;然后分析了对角加载方法对有色噪声条件下的MUSIC算法的影响,为加载量的选取提供了依据;最后通过实验分析,给出了最佳加载量的选取准则。分析表明,加载噪声比取10~15 dB即可取得较好的改善效果。The Multiple Signal Classification(MUSIC)algorithm assumes that the noise is Gaussian white noise with zero mean.In practical applications,the noise is often colored due to devices such as the filter.In this paper,in the case of colored noise,the diagonal loading technology is used to improve the MUSIC anti-jamming algorithm.First,through theoretical and simulation experiments,the impact of colored noise on the MUSIC anti-jamming algorithm is analyzed.Then the influence of diagonal loading technology on the MUSIC algorithm with colored noise is analyzed,which provides a basis for the selection of loading.Last,the principle of the optimal loading capacity is presented through experiment.Analysis shows that a good improvement can be achieved when loading noise ratio is 10-15 dB.

关 键 词：多重信号分类算法 卫星导航抗干扰 有色噪声 对角加载 

分 类 号：P228[天文地球—大地测量学与测量工程]