求根MUSIC算法与四阶MUSIC算法的分析比较  

Analysis and Comparison between Root-MUSIC Algorithm and Fourth-order MUSIC Algorithm

作　　者：万军[1] 束坤[2] 

机构地区：[1]江苏科技大学,镇江212003 [2]船舶重工集团公司723所,扬州225001

出　　处：《舰船电子对抗》2008年第4期97-100,112,共5页Shipboard Electronic Countermeasure

摘　　要：传统的MUSIC算法虽然具有超分辨能力,但是在现代脉冲雷达中,加性噪声往往存在色噪声,这时传统的MUSIC算法就会失效。提出了两种改进方法——求根MUSIC算法和四阶MUSIC算法,前者用求多项式根的方法来代替MUSIC算法中的谱搜索,后者是基于四阶累计量来抑制色高斯噪声。通过计算机仿真证实两者在高信噪比情况下效果都很好,信噪比低的时候前者要好于后者。The traditional MUSIC algorithm has super-resolution capacity,b radar,the additive noise often contains colored noise, then the traditional ut in the modern pulse MUSIC algorithm will lose efficacy. This paper puts forward two improvement methods root-MUSIC algorithm and fourth-order MUSIC algorithm, the former uses the method of finding the multinomial root to re- place the spectrum search in the MUSIC algorithm,the later is based on fourth-order cumulant to suppress colored Gaussian noise. Through the computer simulation,it is confirmed that the effects of both methods are very good in the high signal-to-noise ratio,but when the signal-to-noise ratio is low,the effect of the former is better than in that of the later.

关 键 词：传统MUSIC 色噪声 求根MUSIC 四阶MUSIC 

分 类 号：TN971.1[电子电信—信号与信息处理]