本文介绍了TCM技术背景，研究了TCM编码和译码的方法，讨论了TCM编码增益的来源，阐述了TCM的发展前景，并指出了周联合优化思想进行通信系统设计的重要性。-This article describes the the TCM technical background, the of TCM coding and decoding methods, sources of TCM coding gain on the prospects for the development of TCM, and pointed out the importance of communication system design week joint optimization thinking.