介绍了喷泉码中LT 码的编码译码过程，提供了详细的MATLAB 仿真代码和说明. 通过对三种不同度分布的LT 码进行性能仿真，并对仿真结果进行了分析，同时也对LT 码和Raptor 码进行了适当的比较.-Encoding of LT codes decoding process of fountain codes, and provide a detailed MATLAB simulation code and descr iption. Performance simulation, and the simulation results are analyzed by the distribution of three different degrees of LT code, as well as the LT code Raptor codes proper comparison.