Direction-of-Arrival Estimation of Arry Steering Matrix Moore-Penrose Inverse

To estimate the DOA of weak signals and unknown source number, the traditional methods were to find the direction of arrival after estimated the source number, which led to the performance deterioration caused by incorrect source number estimation. In this paper,a direction of arrival estimation algorithm combined with the array steering matrix Moore-Penrose inverse and MUSIC (MUltiple SIgnal Classification) was proposed, made full use of advantage of the Moore-Penrose inverse that could estimate the direction of arrival of unknown source number and MUSIC algorithm with high accuracy. This method did not need source number for direction finding,thus avoided to suffer performance degradtion because of incorrect source number. To verify the performance of the algorithm,we has a mass of simulation testify.The results demonstrate:compared with the traditional methods that need source number estimation before find the direction of arrival, the propose method has higher accuracy, stronger robustness especially in low signal-to-noise ratio.