【摘要】 在卫星通信系统的阵列信号处理中,由于阵列孔径的限制,现有DOA解相干算法所能够分辨的信源数以及能够达到的谱分辨率一直不高,导致不能精确定位信号波达方向,卫星通信无法准确传递信息。因此,提出一种分辨率高、稳定性好的解相干算法(MSVD),利用入射信号的非圆对称性,对原阵列进行有效的扩展,得到新的虚拟阵列,再用SVD算法对新的阵列进行谱峰搜索。仿真结果表明,MSVD算法与SVD算法相比,其精度更高、稳定性更好、分辨率更高、且可以估计的信源数更多。更多还原

【Abstract】 Due to the limitation of the aperture of the array in array signal processing of satellite communication system,the number of the signals,which the existing decorrelate coherent sources algorithms could handle,as well as the spectral resolution,is not big,which leads to imprecise location of DOA,then,satellite communication cannot accurately transmit information.So a high resolution and stability algorithm which can decorrelate coherent sources is needed.In this paper,such a new algorithm(MSVD) is proposed,which expands the aperture of the array effectively when the signals are noncirularly symmetric.Then we can search spectral peak by SVD algorithm.The computer simulations show that,compared with SVD algorithm,MSVD algorithm has higher accuracy,better stability and higher resolution.Also,it can handle more signal sources than SVD algorithm.更多还原