格栅编码调制在不对称数字用户环路中的时分复用

Time Division Multiplexing of TrellisCoded Modulation in Asymmetric Digital Subscriber Loop

分析了格栅编码调制（ＴＣＭ）在不对称数字用户环路（ＡＤＳＬ）中的应用环境，提出了格栅编码器时分复用的概念，并采用改进的编码方案解决了时分复用中出现的存储容量过大的问题。

Trelliscoded modulation (TCM) has been used as an efficient modulation means in asymmetric digital subscriber loop (ADSL). In this paper, the application environment of TCM in ADSL is discussed, and the concept of trellis coder's time division multiplexing (TDM) is propounded. With improved trellis coded method, the problem of memory capacity increase due to using TDM is resolved.