摘要
The mechanism of the performance degradation for space-frequency spectrum estimation due to channel mismatching and sensor coupling is analyzed. In order to overcome existed methods' limitation that can only compensate one or two influent factors, a new comprehensive calibration method that can compensate channel mismatching and sensor coupling is proposed which improves the calibration precision greatly. It is applied to estimate directions and frequencies simultaneously, and am important conclusion that these influent factors can not edict frequency-estimations is drawn. This method is easy to be implemented and the results of acoustic experiments in anechoic room show its effectiveness.
The mechanism of the performance degradation for space-frequency spectrum estimation due to channel mismatching and sensor coupling is analyzed. In order to overcome existed methods' limitation that can only compensate one or two influent factors, a new comprehensive calibration method that can compensate channel mismatching and sensor coupling is proposed which improves the calibration precision greatly. It is applied to estimate directions and frequencies simultaneously, and am important conclusion that these influent factors can not edict frequency-estimations is drawn. This method is easy to be implemented and the results of acoustic experiments in anechoic room show its effectiveness.
基金
This work is supported by the National Science Foundation of Zhejiang Province!No: 593049
