CAJ | 학술논문

利用单个三轴地震波传感器可对水中目标进行被动探测和定位，为了提高地震波传感器的目标分辨能力，将MUSIC算法用于单地震波传感器的方位估计中。针对传统MUSIC方法在相干信号源条件中性能下降的问题，提出斜投影极化分离方法对水中多径传播信号进行分离，在不同的极化状态空间对目标的空间谱进行估计实现水中目标的高分辨方位估计。仿真结果表明，该方法依靠单个地震波传感器便可实现浅水多途环境下的高分辨方位估计。湖试数据的处理结果验证了该方法的有效性。
이용단개삼축지진파전감기가대수중목표진행피동탐측화정위，위료제고지진파전감기적목표분변능력，장MUSIC산법용우단지진파전감기적방위고계중。침대전통MUSIC방법재상간신호원조건중성능하강적문제，제출사투영겁화분리방법대수중다경전파신호진행분리，재불동적겁화상태공간대목표적공간보진행고계실현수중목표적고분변방위고계。방진결과표명，해방법의고단개지진파전감기편가실현천수다도배경하적고분변방위고계。호시수거적처리결과험증료해방법적유효성。
The passive detection and location of the underwater target can be realized by using a single three-axis seismic sensor. In order to increase the resolving capacity in merely using the condition of only deploying single Ocean Bottom Seismometer (OBS), the MUSIC algorithm is introduced into DOA (Direction Of Arrival) estimation. To address the performance degradation caused by the traditional MUSIC algorithm existing in the coherent signal source, the oblique projection polarization separation method is employed to separate multi-path propagating signal which gives the high resolution DOA estimation in various subspace of polarization state based on the estimate to spatial spectrum of the target in water. The simulation results show that the proposed of this algorithm achieves high resolution DOA estimation with only one OBS in shallow water multi-path environment. The experimental results using data collected in lake demonstrate the effectiveness of proposed algorithm.