LDPC码的完整的编译码，抑制载波型差分相位调制，包括随机梯度算法，相对梯度算法，保证准确无误，是学习通信的好帮手，给出接收信号眼图及系统仿真误码率，鲁棒性好，性能优越。- Complete codec LDPC code, Suppressed carrier type differential phase modulation, Including stochastic gradient algorithm, the relative gradient algorithm, Ensure accurate communication is learning a good helper, The received signal is given eye and BER simulation systems, Robustness, superior performance.