一种相干环境下的稳健自适应波束形成算法

针对均匀线阵提出了一种相干环境下的稳健自适应波束形成算法.该算法首先对接收数据采样协方差矩阵进行迭代Toeplitz处理,一方面可实现对相干信号的去相关,另一方面避免了由噪声子空间扰动引起的性能下降;然后利用处理后的矩阵进行基于特征空间的自适应波束形成,从而很好地解决了存在波束指向误差时的相干干扰抑制问题,并且在小快拍情况下也具有良好的阵列输出性能.计算机仿真实验结果证明了该方法的有效性.

A Robust Adaptive Beamforming Algorithm in Coherent Jamming

For the uniform linear array, a robust adaptive beamforming algorithm for rejecting the coherent jamming is presented. Firstly, the sampled covariance matrix is transformed by iterative Toeplitz processing. Thus, on one hand, the deeorrelation of co-herent signals is realized; on the other hand, the performance degradation due to the disturbance of noise subspaee is avoided. Then with the transformed covariance matrix, the eigenspaee-based beamforming is implemented. This method, therefore, not only solves the coherent jamming rejection problem in the case of beam pointing error, but also possesses relatively high output perform-ance when the number of sampling is few. The effectiveness of the method presented is demonstrated by computer simulation re-sults.