基于一致聚焦的宽带信号波达方向估计

Direction finding method for wideband signals base on consistent focusing

MTLS聚焦需要预估计波达方向,预估计偏差会影响聚焦效果,严重时会导致CSM算法失效。基于AMI思想构造了CMTLS一致聚焦变换,该聚焦变换无需预估计波达方向,提高了聚焦性能的同时,增强了算法的实时性。

MTLS focusing method needs estimating direction of arrival firstly. Estimation bias in only few frequency bins could impair the entire USCM（universal spatial covariance matrix） estimation. Consistent MTLS focusing method was proposed based on the idea of AMI（array manifold interpolating）. Simulations show CMTLS focusing method not only improves the focusing performance, but also reduces the computational burden.