基于四阶累积量的CSPRIT算法  

Fourth-order cumulant based CSPRIT algorithm

作　　者：沈怡平[1] 侯朝焕[1] 马晓川[1] 

机构地区：[1]中国科学院声学研究所

出　　处：《中国科学院研究生院学报》2007年第3期325-330,共6页Journal of the Graduate School of the Chinese Academy of Sciences

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.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 onedimensional signal sources, such as the 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.

关 键 词：累积量 波束形成 旋转不变性 DOA估计 

分 类 号：TN911.7[电子电信—通信与信息系统]