基于加权最小二乘的多基地声呐定位算法研究

Research on Localization Algorithm Based on WLS for Multi-static Sonar

研究水下监视目标跟踪声呐定位精度问题,改善双基地声呐在某些区域(如基线区、发射和接收站的侧边区)定位性能,为了提高系统定位精度,最有效的方法就是增加发射和接收站的数量,形成多基地声呐。根据多基地声呐的几何关系,提出了加权最小二乘估计的多基地声呐定位优化算法,结合定位误差的表达式,对定位性能进行了仿真。仿真结果表明,基于加权最小二乘估计的多基地声呐定位优化算法,能够充分利用各基站的测量信息,有效提高声呐系统的定位精度。与基于距离信息的多基地声呐定位算法相比,算法不仅具有较高的定位精度,而且可以有效解地解决边区定位误差较大的问题。

To improve the localization accuracy of bistatic sonar in baseline district and side districts of transmitter and receivers,the most effective method is to increase the number of the transmitters and the receivers to forming a multi-static sonar system.In this paper,the weighted least squares（WLS） localization algorithm for multi-static sonar is proposed based on the geometry relationship of the multi-static sonar.The localization principle and the error formulation are given.The performance of the algorithm is studied based on numerical simulation.The simulation results show that the WLS localization algorithm can take full application of the measured information to improve the localization accuracy of the sonar system.Compared with the time-only-localization method,WLS algorithm has high localization accuracy and can solve the problem of high localization error in the baseline district and side districts for the bistatic sonar.