【摘要】 本文研究了相干分布式信号源条件下的波达方向(DOA)估计问题。现有的分布式信号源模型的DOA估计方法一般需要假设描述分布式目标信号源模型的角信号分布函数具体的数学形式已知,并需求解2维或高维非线性参数估计问题。在角信号分布函数具体的数学形式未知的条件下,本文利用角信号分布函数的共轭对称性,提出了一种相干式分布源DOA估计的ESPRIT算法。该方法估计性能优于常规ESPRIT算法,与相干分布式目标特征值搜索方法相比,运算量较小,且避免了估计结果的模糊性问题。更多还原

【Abstract】 The problem of direction of arrival(DOA) estimation of distributed source is studied in this paper.Ordinary methods for direction of arrival estimation of distributed source always assume the mathematical form of angular signal distribution function is known,and need to solve two or high dimension nonlinear parameter estimation problem.Under the situation that the mathematical form of signal angle distribution function is unknown,an ESPRIT-like algorithm is proposed.It has better estimation performance than ordinary ESPRIT algorithm.Compared with eigenvalue search methods,the proposed algorithm has lower calculation burden and avoids the ambiguity of the estimation result.更多还原