| DVB-S2中LDPC和积译码的GPU实现 |
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| 引用本文： | 李敏,王军,赵明.DVB-S2中LDPC和积译码的GPU实现[J].电视技术,2010,34(12). |
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| 作者姓名： | 李敏 王军 赵明 |
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| 作者单位： | 清华大学电子工程系;清华大学数字电视研究中心;清华大学信息技术研究院; |
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| 摘 要： | 第二代卫星数字广播系统DVB-S2采用接近Shannon限的LDPC码作为内码.在LDPC译码方式中,软判决的和积译码性能最佳,但是由于其采用大量浮点数运算,使得译码器的软硬件实现都较困难.为此,提出一种采用图形处理器(GPU)编程进行译码的实现方式.GPU的并行处理功能使其可以同时满足高精度浮点运算和高速实时解码的要求,为DVB-S2的实际应用提供了新的思路.采用计算机上NVIDIA GeForce 9600显卡编程环境,实现了满足高清视频要求的信息吞吐速率.
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| 关 键 词： | DVB-S2 LDPC 和积译码 GPU |
GPU Implementation of LDPC Sum-product Decoding in DVB-S2 |
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| LI Min,WANG Jun,ZHAO Ming.GPU Implementation of LDPC Sum-product Decoding in DVB-S2[J].Tv Engineering,2010,34(12). |
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| Authors: | LI Min WANG Jun ZHAO Ming |
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| Affiliation: | LI Mina,WANG Junb,ZHAO Mingc(a.Department of Electronic Engineering,b.Digital TV Research Center,c.Research Institute of Information Technology,Tsinghua University,Beijing 100084,China) |
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| Abstract: | Second generation of digital broadcasting system DVB-S2 uses Low Density Parity Check(LDPC) code as its inner error correction code.Among decoding methods of LDPC,sum-product decoding based on soft-decision has the best performance,but it is hard to implement on software or hardware,because it uses many float-point calculations.To solve this problem,a decoding method is promoted using Graphic Processing Units(GPU) programming.The parallel processing ability of GPU enables high-accuracy calculation and high-... |
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| Keywords: | DVB-S2 LDPC sum-product decoding GPU |
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