| ATSC DTV系统中TCM编译码器的实现和简化 |
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| 引用本文： | 李红军,葛建华,董亚萍,金博. ATSC DTV系统中TCM编译码器的实现和简化[J]. 现代电子技术, 2007, 30(2): 13-16 |
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| 作者姓名： | 李红军 葛建华 董亚萍 金博 |
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| 作者单位： | 西安电子科技大学,综合业务网国家重点实验室,陕西,西安,710071 |
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| 摘 要： | 对ATSC DTV 8 VSB系统调制器中数据处理部分进行分析,给出一种硬件实现方案。采用一个2/3码率的TCM编码器代替ATSC标准中12支路并行的编码器,并自然地插入了同步数据,从而降低了系统复杂度。针对系统中TCM译码器,提出一种可变译码深度的译码方法,简化了系统的控制。结合联合均衡和TCM译码技术,提出多重深度译码的方法,降低了错误传播对判决反馈均衡器的影响,从而提高均衡器的性能。
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| 关 键 词： | Viterbi译码 联合均衡 |
| 文章编号： | 1004-373X(2007)02-013-04 |
| 修稿时间： | 2006-08-29 |
Implement and Simplification of TCM En-decoder in ATSC DTV Systems |
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| LI Hongjun,GE Jianhua,DONG Yaping,JIN Bo. Implement and Simplification of TCM En-decoder in ATSC DTV Systems[J]. Modern Electronic Technique, 2007, 30(2): 13-16 |
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| Authors: | LI Hongjun GE Jianhua DONG Yaping JIN Bo |
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| Abstract: | Analysis of the data procession part of ATSC DTV modulator is made and a hardware implement scheme is proposed.Using a TCM encoder with rate equal to 2/3 instead of 12 parallel branch encoders reduced the system complexity and inserted the syncs naturally.Decoding method with changeable decoding depth is proposed for the TCM decoder,which simplified the control in the decoder.Multiple decoding depth method is shown according to the joint equalization and decoding technique to reduce the error propagation and raise the performance of Decision Feedback Equalization(DFE). |
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| Keywords: | ATSC TCM |
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