摘要
介绍比特交织格状编码调制 ＭＱＡＭ的编译码原理，软判决译码中使用信道状态信息（ＣＳＩ）是ＣＯＦＤＭ在频率选择性衰落和干扰下获得优异性能的关键。研究ＣＯＦＤＭ数字ＴＶ广播系统中使用ＣＳＩ的维特比译码器的一种实现方法。
The codec principle of bit-interlevered Trellis coded MQAM is introduced in this paper. The inclusion of channel-state information (CSI) in the generation of soft decisions is the key to the unique performance of COFDM in the presence of frequency-selective fading and interference. An implementation method of the Viterbi decoder using CSI in COFDM digital TV broadcasting system is also investigated in this paper.
出处
《电视技术》
北大核心
2000年第3期14-16,共3页
Video Engineering
基金
国家自然科学基金!69602007
关键词
数字电视
电视广播系统
格状编码调制
DTV
COFDM
bit interleaving
TCM
viterbi decoding
channel state information
