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格型编码调制ＴＣＭ把卷积编码和ＰＳＫ或ＱＡＭ调制相结合，在功率有限和带宽有限的信道中能够获得较大的编码增益．文中提出了一种将删除型卷积码和ＭＰＳＫ调制结合的方法，使译码的复杂度降低，并在计算机上对具有最大欧几里德距离、信息率ｒ为２／３的删除型卷积编码调制的好码进行了搜索．结果表明：具有最大自由距离的删除型卷积码和相同传输信息率的未编码系统相比，其编码增益不是最大的；而本文中搜索到的好码可以得到Ｕｎｇｅｒｂｏｅｃｋ码的编码增益，同时由于该码具有删除型结构，译码的复杂度可以降低．
Lattice Modulation Modulation TCM combines convolutional coding with PSK or QAM modulation to achieve greater coding gain in channels with limited power and limited bandwidth. In this paper, a new method of combining convolutional code with MPSK modulation is proposed, which reduces the complexity of decoding and reduces the complexity of decoded convolutional code with the maximum Euclidean distance and the information rate of 2/3 A good code of product code modulation was searched. The results show that the coding gain of the deleted convolutional code with the largest free distance is not the largest compared with the uncoded system with the same transmission information rate. However, the good coding code obtained in this paper can obtain the coding gain of the Ungerboeck code, meanwhile, The code has a delete type structure, decoding complexity can be reduced.