提出一种新的接收机结构 ,用于卷积编码和差分幅度相移键控调制的迭代译码 ,其性能接近于加性高斯白噪声信道上的相干检测 .此外 ,还提出了对于 Lin等人的网格编码结构的最佳译码 ,性能优于其准最佳译码 ,但译码延时要比传统网格编码调制或卷积码的译码延时长 . A new receiver structure is proposed for iterative decoding of convolutional coding and differential amplitude-shift keying modulation, whose performance is close to coherent detection on additive white Gaussian noise channels. In addition, The best decoding of human grid coding structure is better than the quasi-optimal decoding, but the decoding delay is longer than the decoding delay of traditional grid coding modulation or convolutional code.