Abstract：To achieve good performance when applying subspace method based on four-order cumulants in DOA estimation, signals are required to be independent to satisfy non-coherence of four-order. Here, a modified method without independence requirement is proposed. First, the relation between non-coherence of four-order and carrier frequencies of analytical signal is studied with baseband signals independent or not, then a set of small frequencies offset is designed. With the transmitter modulating signals in baseband with the frequencies, the array receiver can achieve good performance of DOA estimation with subspace method based on four-order cumulants whether signals are independent or not. Simulation proves its validity.
刘学斌; 季飞; 韦岗. 基于微小频偏的新的四阶累积量DOA子空间估计法[J]. 电子与信息学报, 2005, 27(5): 745-748 .
Liu Xue-bin; Ji Fei; Wei Gang . A New Subspace Method of DOA Estimation with Four-Order Cumulants Based on Small Frequency Offset. , 2005, 27(5): 745-748 .
2005, Vol. 27 
