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, an