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分析了均匀线阵噪声子空间法在宽频段多信号环境下存在的主要问题:不能保证频率和空间方向矩阵的列矢量线性独立、使用方向矢量搜索方法时不能同时正确估计多个信号到达方向两个问题。分析所得结论对于探索利用一维(1—D)方法实现宽频段多信号同时测向具有有益的参考价值,计算机模拟结果证明了本文分析的正确性。
The main problems of the uniform linear noise subspace method in wideband multi-signal environment are analyzed. The linear vectors of the column vectors of the frequency and spatial direction matrices can not be guaranteed. When using the direction vector search method, it is impossible to correctly estimate the arrival directions of multiple signals A question. The results of the analysis have useful reference values for exploring simultaneous detection of wideband multi-signals by using one-dimensional (1-D) method. Computer simulation results prove the correctness of the analysis.