一种基于四阶累量阵简化的DOA估计方法

我们提出一类新的基于四阶累积量矩阵的DOA估计算法，对累量阵结构作适当的调整，再把它直接应用于已发展的很好的算法(如ESPRIT)中，使算法更加适用于DOA问题。通过与ESPRIT一起使用下面所提的累积量阵，增加了虚拟阵元(两倍于实际阵元数)，且减少了计算量，并因累量对高斯噪声不敏感，提高了算法的分辨能力。仿真试验验证了分析结果，表明了算法良好的性能。

An Algorithm of DOA Based on Fourth-order Cumulants

A novel algorithm of DOA eatimation based on fourth-order eumulants is presented. The suitable adjustment of the components of the cumulant matrices make it more applicable to DOA problems by applied directly to the well developed algorithms such as ESPRIT. By using the proposed cumulants matrices along with ESPRIT algorithm, the virtual sensors (twice the actual sensors) are added and the computational cost is reduced. As the algorithm is insensitive to additive Gaussian noise, the resolvability can be enhanced. Simulation experiments are included to validate the analytical result and to illustrate the potential performances of the proposed algorithm.