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.
出处
《数字通信世界》
2016年第1期8-12,共5页
Digital Communication World
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
QAM
convolution coding
constellation map
clock recovery
carrier synchronization
self-adaptive decision feedback equalizer
