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中国科学院大学学报 ›› 2007, Vol. 24 ›› Issue (3): 325-330.DOI: 10.7523/j.issn.2095-6134.2007.3.009

• 论文 • 上一篇    下一篇

基于四阶累积量的CSPRIT算法

沈怡平 侯朝焕 马晓川   

  1. 1中国科学院声学研究所,北京 100080

    2中国科学院研究生院,北京 100049

  • 收稿日期:1900-01-01 修回日期:1900-01-01 发布日期:2007-05-15

Fourth-order cumulant based CSPRIT algorithm

SHEN Yi-Ping, HOU Chao-Huan, MA Xiao-Chuan   

  1. 1 Institute of Acoustics, Chinese Academy of Sciences Beijing 100080
    2 Graduate University of the Chinese Academy of Sciences Beijing 100049
  • Received:1900-01-01 Revised:1900-01-01 Published:2007-05-15

摘要: 分析了基于二阶统计的CSPRIT算法在空间相关高斯噪声环境中存在的问题,提出将四阶累积量与CSPRIT算法相结合,处理一维二元相移键控信号(BPSK)和多元幅移键控信号(MASK),实现信号到达角(DOA)的估计和波束形成器的构造。与基于二阶统计的CSPRIT算法相比,基于四阶累积量的改进算法能够有效抑制空间相关的高斯噪声,提高信号估计精度。计算机仿真验证了该算法的有效性。

关键词: 累积量, 波束形成, 旋转不变性, DOA估计

Abstract: By analyzing the problems of CSPRIT algorithm based on second-order statistics under space correlated Gaussian noise, a new algorithm combining fourth-order cumulant and CSPRIT algorithm is proposed to process one-dimensional signal sources, such as binary phase shift keying (BPSK) and M-ary amplitude shift keying (MASK). DOA estimation and beamforming construction can be achieved simultaneously in this way. Compared to the original CSPRIT algorithm, this improved algorithm based on fourth-order cumulant can depress space correlated Gaussian noise well and get more accurate estimation of signals. The validity of this algorithm is also proved by computer simulation.

Key words: cumulant, beamforming, rotational invariance, DOA estimation

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