基于波束空间的后验稀疏约束迭代DOA估计方法

摘要

基于后验稀疏约束的高分辨窄带信号波达方向（DOA）迭代估计算法在每次迭代时需要计算高阶矩阵的逆.本文提出了后验稀疏约束迭代DOA估计的波束空间简化实现算法.波束空间的滤波预处理避免了受噪声影响的正则化参数选取问题.由于每次迭代需要求逆的矩阵阶数一般为3或4，大大简化了DOA估计的计算量.%A non-parametric algorithm for DOA estimation with high-resolution is presented based on a single snapshot from a sensor array and a well-designed beam-space pre-processor.The iterative de-convolution processing utilizes the sparsity constraint.Numerical results illustrate that the algorithm converges to the DOA estimate with high-resolution in a few iterations.