全数字128QAM调制解调器的实现与分析  

Realization And Analysis of Full Digitial 128QAM Modulator-Demodulator Abstract

作　　者：曹桂芹 赵宪臣 姜士强 王国利 

机构地区：[1]山东泉清通信有限责任公司,济南250101

出　　处：《数字通信世界》2016年第1期8-12,共5页Digital Communication World

摘　　要：本文介绍了128QAM调制解调器的具体实现方法,从发端的卷积编码、星座图映射,到收端的时钟提取、载波恢复、均衡、译码及二次判决等,着重介绍了时钟提取及载波恢复,同时对载波恢复进行了全面的分析及阐述。This article provides detailed information in realization of a 128 QAM modem. In the article introductions of convolution coding and constellation mapping in the transmitter side are given. Clock recovery, carrier recovery, equalization, decoding and second decision are also provided. The article specially introduces clock recovery in 128 QAM modem.

关 键 词：QAM 卷积编码 星座图 时钟恢复 载波同步 自适应判决反馈均衡器 

分 类 号：TN92[电子电信—通信与信息系统]