CAJ | 학술논문

分析了空间谱估计中多信号源方向和频率估计中通道失配和阵元互耦导致系统性能下降的机制。克服了现有矫正方法只能针对单频信号补偿某个或某几个误差影响因素的局限性，提出通道失配和阵元互耦的综合补偿新技术，大大提高了误差矫正的精度。首次尝试在频率、方向同时估计中应用误差校正技术，并得出了一重要结论——这几种误差影响因素对频率估计没有影响，且此方法可推广应用于倍频程信号、窄带随机信号和单频信号的组合情况。消声室声学实验证明了该方法的正确性。
분석료공간보고계중다신호원방향화빈솔고계중통도실배화진원호우도치계통성능하강적궤제。극복료현유교정방법지능침대단빈신호보상모개혹모궤개오차영향인소적국한성，제출통도실배화진원호우적종합보상신기술，대대제고료오차교정적정도。수차상시재빈솔、방향동시고계중응용오차교정기술，병득출료일중요결론——저궤충오차영향인소대빈솔고계몰유영향，차차방법가추엄응용우배빈정신호、착대수궤신호화단빈신호적조합정황。소성실성학실험증명료해방법적정학성。
In this paper，the mechanism of the performance degration due toChannel Mismatching and Sensor Coupling in Azimuthals and Frequencies is analyzed.To overcome existing methods’limitations that can only compensate one or two influenec factors,a new comprehensive calibration method that can compensate Channel Mismatching and Sensor Coupling is proposed. This method raises the calibration precision greatly.Firstly,we apply the new method to estimate Directions and Frequencies simultaneously,and an important conclusion that these influence factors can not affect frequency estimation is drawn.This method is easy to be implemented and the results of acoustic experiments in anechoic room show that the proposed method is effective.