CAJ | 학술논문

针对水中机动宽带目标，对于设计好的均匀线列阵，采用空间重采样方法计算基阵的恒定束宽阵元权系数，进而利用该阵元权系数产生聚焦矩阵，通过聚焦矩阵将不同频带的子带信号映射到同一参考频率上，然后将所有频率成分的信号功率谱密度矩阵作平均，并结合MUSIC(Multiple Signal Classification)算法，估计出目标的方位信息，从而实现水中宽带目标的被动跟踪。采用该方法进行仿真试验分析，结果表明在小孔径基阵上可实现宽带单目标的稳定测向被动跟踪，且对多目标具有一定的角被动分辨效果。
침대수중궤동관대목표，대우설계호적균균선렬진，채용공간중채양방법계산기진적항정속관진원권계수，진이이용해진원권계수산생취초구진，통과취초구진장불동빈대적자대신호영사도동일삼고빈솔상，연후장소유빈솔성분적신호공솔보밀도구진작평균，병결합MUSIC(Multiple Signal Classification)산법，고계출목표적방위신식，종이실현수중관대목표적피동근종。채용해방법진행방진시험분석，결과표명재소공경기진상가실현관대단목표적은정측향피동근종，차대다목표구유일정적각피동분변효과。
Based on the designed uniform linear array, the passive tracking for underwater broadband targets is conducted as follows:using the spatial resample method for calculating the element weight coefficients of a constant beam-width array to generate a focusing matrix, which maps the sub-band signals of different frequency bands of the broadband signal on the same reference frequencies, then averaging the signal power spectral density matrix of all frequency components and combining with MUSIC algorithm to estimate the orientation information of the target and to realize the passive tracking of underwater broadband target. Simulation of using this method has been done. The result shows that for a single broadband target this method has the stable tracking performance on a small aperture array, and has a certain effect on angle passive distinguish of multi-targets.