Robust interference suppression of wideband irregular subarrayed phased array based on subarray level processing
A robust interference suppression method based on subarray level processing is proposed for the poor performance of wideband irregular subarray phased arrays in complex interference environments.Firstly,the subarray level echo model of wideband array with errors is established.The wideband linear frequency modulation echo signal can be transformed into narrowband signal through the subarray digital Stretch processing and the effective bandwidth of processing can be reduced.Then,the method of interference and noise covariance matrix reconstruction based on spectral separation is further improved,and the measured prior information is used to divide the molecular interval to decrease the reconstruction area and reduce the amount of computation.Finally,the optimal weight is used to weight each channel data to obtain the array output.The proposed method makes good use of the advantages of irregular subarrays and avoids the presence of gate lobes in the pattern of regular subarrays.It can also suppress interference in the case of multiple combination interference and error,and has strong robustness.
万方数据
维普
