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

LT码编译码仿真程序，matlab环境下运行正常(LT code compiling code simulation program, running normal under Matlab environment)