Fang算法利用三个基站对信号源位置进行二维的定，是信号源无源定位的一种基本方法。本程序基于MATLAB，对Fang算法定位的过程进行了仿真。希望能对研究无源定位的同志给予帮助。-Fang base algorithm uses three-dimensional location of the source fixed, the signal source is a basic method of passive location. The program is based on MATLAB, Fang algorithm for the simulation process of positioning. Hoping to study passive positioning of the comrades for help.