相关噪声背景下相干信源DOA估计算法研究

根据信号和噪声的非圆对称特性，利用除第一个阵元外的其它阵元接收数据的共轭信息，对原阵列进行有效地扩展，提出了一种相关噪声背景下相干信源波达方向（DOA）估计的新算法。由于对阵列进行了虚拟扩展并运用斜投影算法将非相干信源与相干信源分开分辨，因此该算法具有很强的信源过载能力及阵元节省能力，在一定程度上提高了空间分辨率DOA估计的性能，并可对消空间具有非圆对称性的相关噪声，适用于低信噪比环境。仿真结果证明了算法理论的正确性和有效性。

DOA estimation algorithm for coherent signals under correlated noise

Based on the noncircular symmetric property of the signals and noise,employing the received data's conjugate data of all the array elements except for the first element to extend the original array,a new DOA estimation algorithm for coherent signals is proposed in the presence of correlated noise.Because of extending the array and using the oblique projection to resolve the correlated and incoherent sources separately,more sources can be estimated using the same number of sensors,in addition,the spatial res...