基于盲信号分离的高分辨测向算法研究

The Research of High Resolution Direction Finding Algorithm Based on Blind Signal Separation

文章首先介绍了一种基于快速定点的盲分离算法，该算法可以对来自不同方向上的统计独立信号进行有效的分离，并且不需要预先知道信号的方向和阵列的结构流形，因此该算法被称为盲分离算法。该算法不仅有传统的波束形成的优点，即在有用信号方向形成主波束，并且还能够在干扰方向形成很好的零点，所以该算法是波束形成技术和零点形成技术的结合，可大大提高信干比。在盲分离的基础上，文章提出了一种高分辨。测向算法，该算法在高信噪比的情况下，具有与MUSIC、ESPRIT和最大似然算法相似的分辨率，而在低信噪比的情况下，体现了该算法的优越性，具有很好的分辨率。

The blind signal separation （BSS） algorithm based on fast fixed-point is introduced in this paper. By using this algorithm, without knowing the direction of signal and the structure of the antenna array, the statistical independent signals from different directions can be separated effectively, so this algorithm is named as BSS algorithm. This algorithm not only has the merit of traditional beamforming algorithm the main beamform can be formed in the anticipant direction, but also can create zero-point in the interferential direction. This algorithm is the combination of beamforming and zero-point forming technology, and can improve the signal-to-noise ratio greatly. Based on BSS, a high resolution direction finding algorithm is advanced. This high resolution direction finding algorithm has the similar resolution compared with MUSIC, ESPRIT and Maximum Likelihood algorithm under the condition of high SNR. While under the condition of low SNR, this algorithm has good resolution, this is the merit of this algorithm.