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色噪声环境下强相关源的DOA估计 总被引:2,自引:0,他引:2
结合MMUSIC(Modified multiple Signal Classfication)算法和SWEDE(Subsapce Method Without Eigen DE composition)方法的优点提出了联合DOA估计方法,该法使得在色噪声环境下强相关信源DOA(Direction Of Arrival)估计成为可能。理论分析与仿真结果表明:联合DOA估计方法在明显降低运算复杂度的同时,无需空间噪声必须为白噪声的约束,更加贴近现实情况,而且有利于在线处理。 相似文献
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基于修正MUSIC算法的宽带相干源波达方向估计 总被引:4,自引:0,他引:4
提出了一种基于修正MUSIC算法的宽带相干源DOA估计方法。对每一子带的接收数据阵进行共轭重构,利用平均的阵列相关矩阵代替传统的阵列相关矩阵进行子空间方法处理,由各子带结果的综合得到信号的DOA估计。数据阵共轭重构的实质是前后向空间平滑,因此可以解相干源问题。中算法取子阵与原阵列相同,因此不会损失阵列孔径。由于空间平滑包含了平均的意义,因此新算法还可以提高对非相干源的估计性能。仿真结果验证了新方法的有效性。 相似文献
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MUSIC与MMUSIC算法对DOA估计性能的比较 总被引:1,自引:0,他引:1
阐述阵列信号处理中广泛采用的MUSIC算法和MMUSIC算法的基本原理,然后理论分析了MUSIC和MMUSIC算法性能.仿真发现MUSIC算法只能估计非相干信号.针对这种情况,提出了一种修正MUSIC算法,该算法可以同时估计相干和非相干信号,计算机仿真结果证明该改进算法是有效的. 相似文献
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Bo Li 《International Journal of Communication Systems》2013,26(7):853-862
An improved algorithm is presented for a signal's direction of arrival estimation to reduce the computational complexity of the existing modified multiple signal classification (MMUSIC) algorithm. In this paper, FFT algorithm is introduced to narrow the searching range of the direction angle. Afterwards, a compromise approach‐based SVD and orthogonal–triangular decomposition takes the place of traditional double SVDs. Then, during matrix calculation, the noise subspace is achieved for the signal's direction of arrival. Finally, the system simulation demonstrates the efficiency and reliability of this novel MMUSIC algorithm. Compared with the existing algorithm, MMUSIC effectively saves the computational complexity with the approximation estimation performance. Copyright © 2011 John Wiley & Sons, Ltd. 相似文献
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