A Method of NLOS Acoustic Passive Location Based on Ray Tracing
Gao Yong · Modern Electronics Technique · 2008
A new method of NLOS acoustic passive location based on ray tracing is presented.The NLOS sound signal usually arrives at acoustic array by diffraction,and the diffracted transmission path is a geodesic according to the extensive Famat′s principle.While the geographic information and more than one angle of arrival are known,the ray tracing is performed between the discrete points which on the diffracted signal′s geodesics.The useful location information is obtained by analyzing the tracing results.Simulation results of columnar and globoid obstacles demonstrate that the estimate coordinates of sound source distribute on a segment of monotonic smooth curve.