双基地声呐定位算法的研究与比较

由于双基地声呐是收发分置的，所以其在水下目标探测和定位方面有着特殊的性质。目前，关于双基地声呐的研究已经引起了人们的广泛关注。该文给出了基于波达时间定位（TOL）和波达方位定位（BOL）的两种双基地声呐定位算法，分别研究了基线长度、时间测量误差、角度测量误差对算法定位精度的影响，最后对这两种算法的定位精度进行了比较和仿真，给出了不同条件下的误差分布曲线。仿真结果表明：双基地TOL算法的定位精度高于BOL定位算法，是一种高精度的双基地声呐定位算法。该算法也可推广应用于多基地声呐的水下定位。

Research on the Algorithms of Localization Performance of Bistatic Sonar

Because of the separable resource and receiver,bistatic sonar has many special character in underwater target detection and localization.At present,the research of bistatic sonar is an important thing.In this paper,the bistatic sonar localization of underwater target is thoroughly studied.Based on bistatic geometry,two simple localization methods TOL(Time-Only-Localization) and BOL(Bear-Only-Localization) are proposed.The localization accuracy of the algorithm for different baseline length,time measurement error and bear measurement error is studied.Through numerical simulation,the Geometrical Dilution of Precision is given.The accuracy of the methods is also intensively studied.The simulating results show that the localization accuracy of the TOL algorithm is better than that of the BOL algorithm.Therefore,the TOL algorithm is an algorithm of high localization accuracy.These two methods can also be used in the localization of multistatic sonar.