It is proved by the perturbation analysis of Signal Subspace that the performances of the method presented here are better than the improved spatial smoothing techniques.
信号子空间的扰动分析表明，这种方法优于修正的空间平滑方法。
By using subspace disturbing analysis to investigate the statistical performance of the CSS, the relationship between the DOA estimation error and the signal to noise ratio (SNR) was presented.
应用子空间扰动分析研究了宽带CSS法的统计性能，得出了宽带CSS法方位估计误差随信噪比变化的关系。
Finally by analysis of the measured data, it is shown that the proposed methods for fast estimation of signal subspace can achieve better results.
最后通过对实测数据的分析可以看到本文提出的快速子空间估计方法都能够取得较好的估计效果。
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