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
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沈怡平 侯朝焕 马晓川
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
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SHEN Yi-Ping, HOU Chao-Huan, MA Xiao-Chuan
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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
中图分类号:
TN911.7
沈怡平 侯朝焕 马晓川. 基于四阶累积量的CSPRIT算法[J]. 中国科学院大学学报, 2007, 24(3): 325-330.
SHEN Yi-Ping, HOU Chao-Huan, MA Xiao-Chuan. Fourth-order cumulant based CSPRIT algorithm[J]. , 2007, 24(3): 325-330.
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链接本文: http://journal.ucas.ac.cn/CN/10.7523/j.issn.2095-6134.2007.3.009
http://journal.ucas.ac.cn/CN/Y2007/V24/I3/325