Direction Finding of Coherent Signals with Mutual Coupling Error Based on Matrix Transformation
Di Wu, Shen Yin · 2014
2. Research Institute of Intelligent Control and Systems, Harbin Institute of Technology, Heilongjiang 150001, China In order to estimate the direction of arrival (DOA) of coherent signals with mutual coupling error, a mutual coupling self-calibration method based on matrix transformation is proposed. First, the real noise subspace is obtained by performing decorrelation; then a novel mutual coupling matrix (MCM) transformation method is given, MCM is expressed by mutual coupling coefficients and position matrix, and array manifold is transformed, decoupling is accomplished by the angle information of signals independent of mutual coupling coefficients; at last, DOA can be estimated by peak searching utilizing the modified rank reduction estimation method. The simulation results of the algorithm illuminate the effectiveness of the proposed method.