冲击噪声下的改进TLS-ESPRIT算法研究

Research on the improved TLS-ESPRIT algorithm in the presence of the impact of noise

在冲击噪声背景和相干信源下,基于高斯白噪声的DOA估计算法完全失效,为了解决该问题,本文提出了一种改进的TLS-ESPRIT算法。本算法的原理是结合分数低阶矩阵知识,将空间平滑理论应用于TLS-ESPRIT算法之中。本文算法无需进行空间谱搜索,因而大大地减少了计算量。计算机仿真实验证明,在冲击噪声背景和多径干扰下,新算法能够精确地估计信源的波达方向。

Under the impact of noise background and disturbed source, the DOA estimation algorithm based on gaussian white noise is ineffective. In order to solve the problem, this paper proposes an improved TLS-ESPRIT algorithm. The principle of this algorithm is to apply spatial smooth theory to the TLS-ESPRIT algorithm combining with fractional lower order matrix knowledge. This algorithm does not need to search space spectrum, which greatly reduces the computation time. The simulaiion experiments of computer prove that under the impact of noise background and muhipath interference, the new algorithm can precisely estimate the DOA direction of source.