多目标方位高分辨估计方法的实验研究

Experimental Study on High-Resolution Direction-of-Arrival Estimation

从实验的角度出发 ,分析讨论了阵列误差条件下多目标方位高分辨估计方法的参数估计性能以及工程应用前景 ,并针对子空间类法研究了一种阵列输出协方差矩阵的Toeplitz化预处理方法。实验结果表明 ,在高信噪比的情况下 ,该预处理方法可以明显地减小阵列误差对估计结果的影响 ,有效地改善子空间类法的稳健性和多目标分辨能力 ,而且估计精度良好。

The performance and prospect in engineering applications of high resolution direction of arrival (DOA) estimation algorithms in the presence of array errors are discussed by means of experiments. An efficient Toeplitz preprocessing method for the covariance matrix of array output based on the subspace approaches is studied. This method can alleviate the effect of array errors significantly. Experiments are conducted to show the improvement in robustness and resolution as well as the high performance in precision by preprocessing.\;