An Optimal Post Processing Detection Method for Underwater Broadband Signals of High-Order Sound Field
According to the weak resolution of small aperture high-order acoustic field sensors under actual multi-target interference conditions in marine environment,a broadband signal optimal detection based on the subset of high-order sound field domain post-processing method is proposed.This method utilizes the characteristic of typical noise fields that signals in different orders of the high-order sound field are decorrelation.The signal power and noise power within one beam are estimated through the subset of high-order acoustic signals with MVDR.An optimal beam domain detection filter based on the signal-to-noise ratio of each subband is constructed.This method is verified through multiple measured dataset on Qiandao Lake.The detection capability is improved by 2-7.5 dB compared with the original method,and the multi-target resolution capability under strong target interference is significantly improved.
high-order sound field sensorbeamformingoptimal post processingtarget detection
万方数据
维普
