CAJ | 학술논문

浅海波导中低频声场存在稳定可观察的干涉结构，目标辐射噪声LOFAR图中呈现干涉条纹图案。从条纹中可以提取出距离特征量信息，它反映了目标运动过程中的距离变化率。由于外部环境的影响或运动态势的改变，LOFAR图中条纹有可能会短暂丢失。此时，基于波导不变条纹的距离特征量提取算法失效。提出了不连续距离特征量信息融合方法，在条纹丢失期间内保持对目标距离特征量轨迹的跟踪。仿真及海试数据处理结果验证了其可行性。
천해파도중저빈성장존재은정가관찰적간섭결구，목표복사조성LOFAR도중정현간섭조문도안。종조문중가이제취출거리특정량신식，타반영료목표운동과정중적거리변화솔。유우외부배경적영향혹운동태세적개변，LOFAR도중조문유가능회단잠주실。차시，기우파도불변조문적거리특정량제취산법실효。제출료불련속거리특정량신식융합방법，재조문주실기간내보지대목표거리특정량궤적적근종。방진급해시수거처리결과험증료기가행성。
Stable interference structure can be observed in low frequency sound field of the shallow water. Striations have been appeared in plots of Low Frequency Analysis Recording(LOFAR) spectrum. Distance change ratio of target in movement can be described by distance characteristic feature. It can be extracted from LOFAR spectrum striations. Because of the influence of external environment or changes of movement situations,sometimes a short time striation loss has been appeared in LOFAR spectrum. The extraction algorithm of distance characteristic feature based on waveguide invariant striations is invalidated temporality. Discontinuous distance characteristic feature information fusion method has been put forward. Distance characteristic feature is tracked between striation loss time. The high performance of fusion method is tested on simulation and experimental results.