论文部分内容阅读
提出一种未知相关噪声环境下带源波达方向估计的快速算法。该算法只对信号子空间进行变换,直接由传播算子构造聚焦矩阵,得到一种快速TCT聚焦矩阵。利用阵列相关矩阵的酉相似变换特性估计噪声相关矩阵,提高了未知相关噪声情况下宽带DOA估计的性能。该算法由线性运算求解聚焦矩阵和噪声相关矩阵,无需特征分解,运算量低,而且适用于未知相关噪声情况,具有重要的工程实用价值。
A fast algorithm of source DOA estimation with unknown correlated noise is proposed. The algorithm only transforms the signal subspace and constructs the focusing matrix directly from the spreading operator to obtain a fast TCT focusing matrix. The estimation of noise correlation matrix using the unitary similarity transform of array correlation matrix improves the performance of wideband DOA estimation under unknown correlated noise. The algorithm solves the focus matrix and the noise correlation matrix by linear operation, does not require feature decomposition, low computational complexity, and is suitable for unknown correlated noise situations, and has important engineering practical value.