Distributed localization method of non cooperative line spectrum sound source
Non cooperative target localization is a research hotspot in the field of underwater acoustic localization.In order to make full use of all kinds of observable parameters,improve the ability to locate non-cooperative targets,this paper proposes a non cooperative target localization method based on the frequency information.This method is aimed at the localization problem of uniform linear moving target.Firstly,we establish the mapping relationship of the observation frequency and the target radiation frequency,moving speed,initial coordinates according to the Doppler frequency shift principle.The objective function is established based on minimum mean square criterion.Then we estimate the approach point distance between each observation node and the target track by the optimization algorithm.Finally,integrating the ranging results of each observation node,build geometric positioning model,the analytical solution of the target motion trajectory is obtained.This paper proves the effectiveness of the method through simulation analysis,and points out that this method needs the target to pass through the approach point of each observation node to obtain better distance estimation ability.The influence of different frequency estimation accuracy on positioning accuracy is analyzed,the simulation results show that the positioning method proposed in this paper has a certain tolerance to the frequency measurement errors,and it is a high-precision non cooperative line spectrum sound source localization method.
Non cooperative positioningPassive locationTrust region optimization methodPassive rangingTarget motion analysis
万方数据
维普
