ldpc编码的matlab例子，比较详细，具有很高的价值,matlab coding ldpc example, more detailed, with a very high value

HARQ技术研究，以喷泉码为研究对象，结合LDPC纠错码而研究的。-HARQ technology research to fountain codes for the study, and research combined with LDPC error correction code.

raptor的MATLAB仿真程序，调试可行，有参考价值，有助于喷泉码的研究(Raptor MATLAB simulation program, debugging feasible, with reference value, contribute to fountain code research)