| OFDM中基于CSI的软输出Viterbi译码器的实现 |
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| 引用本文： | 张浩,冯贤光,叶梧,冯穗力,徐兴. OFDM中基于CSI的软输出Viterbi译码器的实现[J]. 桂林电子科技大学学报, 2005, 25(2): 6-10 |
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| 作者姓名： | 张浩 冯贤光 叶梧 冯穗力 徐兴 |
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| 作者单位： | 华南理工大学,电子与信息学院,广东,广州,510640;华南理工大学,电子与信息学院,广东,广州,510640;华南理工大学,电子与信息学院,广东,广州,510640;华南理工大学,电子与信息学院,广东,广州,510640;华南理工大学,电子与信息学院,广东,广州,510640 |
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| 基金项目： | 广东自然科学基金 (3 1 3 91 ) |
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| 摘 要： | OFDM技术作为有吸引力的调制技术被广泛应用,考虑到可以通过信道估计获得每个子信道的信道状态信息,如此可以将其利用于信道解码,因而OFDM系统的Viterbi译码算法与其他的单载波调制技术中的Viterbi译码算法有很大的不同,其被称为CSIViterbi译码器算法。
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| 关 键 词： | OFDM Viterbi译码器 CSI |
| 文章编号： | 1001-7437(2005)02-06-05 |
| 修稿时间： | 2005-02-25 |
An Implementation of Viterbi Decoder Based on CSI Soft Output in OFDM Systems |
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| ZHANG Hao,FENG Xian-guang,YE Wu,FENG Sui-li,XU Xing. An Implementation of Viterbi Decoder Based on CSI Soft Output in OFDM Systems[J]. Journal of Guilin University of Electronic Technology, 2005, 25(2): 6-10 |
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| Authors: | ZHANG Hao FENG Xian-guang YE Wu FENG Sui-li XU Xing |
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| Abstract: | An attractive modulation scheme of OFDM is widely applied. Considering the fact that the channel state information of each sub-carrier is attained by means of channel estimation, it can be applied to decoding algorithm of channel. And the Viterbi decoding algorithm in OFDM system is largely different from the modulation scheme in single carrier systems, which is called the CSI (Channel State Information) Viterbi decoding algorithm. The paper introduces the CSI Viterbi decoding algorithm in LLR (Log Likelihood Ratio) criterion, and presents a kind of branch metric algorithm based on the character of LLR criterion. At last, an implementation scheme of the CSI Viterbi decoding algorithm is given and is verified by using FPGA. |
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| Keywords: | OFDM Viterbi decoding algorithm CSI |
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