Firstly , The basic theory of the ultra-short baseline system is dissertated.And then, several typical localization model of four cell lineup is analyzed and investigated thoroughly.

• 首先论述了现有超短基线被动声定位系统的基本理论，紧接着深入研究了几种典型的四元方阵的定位模型，通过性能对比、精度分析，讨论得出了最优的定位模型。