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低密度校验码及其在图像传输中的应用 被引量：5

Low-Density Parity-Check Codes and Their Application in Image Transmission
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摘要 低密度校验(Low-Density Parity-Check,LDPC)码是一种基于图和迭代译码的信道编码方案,性能非常接近Shannon极限且实现复杂度低,具有很强的纠错抗干扰能力.该文深入研究了LDPC码的编码和译码基本原理,并将其应用于移动衰落信道图像的传输中,仿真结果表明LDPC码能为图像传输带来显著的性能提高,且系统复杂度低,译码时延短. Low-Density Parity-Check (LDPC) codes axe a class of channel codes based on graphs and iterative decoding whose performance is very close to the Shannon limit with low complexity and have strong error control strength. In this paper, encoding and decoding principles of LDPC codes are deeply studied. At the same time, this coding scheme is applied in image transmission system over Rayleigh fading channel. The simulation results indicate that LDPC codes can make the quality of the image highly improved with rather low system complexity and short decoding time delay.
作者 马丕明 袁东风 杨秀梅 张海刚
机构地区 山东大学信息科学与工程学院
出处 《电子与信息学报》 EI CSCD 北大核心 2004年第8期1269-1275,共7页 Journal of Electronics & Information Technology
关键词 低密度校验码 图和迭代译码 RAYLEIGH 衰落信道 图像传输 Low-Density Parity-Check(LDPC) codes, Graphs and iterative decoding, Rayleigh fading channel, Image transmission
分类号 TN919.8 [电子电信—通信与信息系统]
  • 相关文献

参考文献8

  • 1[1]Gallager G R.Low-density parity-check codes.IRE Trans.on Info.Theory,1962,8(1):21-28.
  • 2[2]McEliece R J,MacKay D J C,Cheng Jung-Fu.Turbo decoding as an instance of Pearl's belief propagation algorithm.IEEE J.on Selected Areas in Communications,1998,16(2):140-152.
  • 3[3]Kschischang F R,Frey B J,Loeliger H.Factor graphs and the sum-product algorithm.IEEE Trans.on Info.Theory,2001,47(2):498-519.
  • 4[4]MacKay D J C.Good error-correcting codes based on very sparse matrices.IEEE Trans.on Info.Theory,1999,45(3):399-431.
  • 5[5]Luby M G,Mitzenmacher M,Shokrollahi M A,Spielman D A.Efficient erasure correcting codes.IEEE Trans.on Info.Theory,2001,47(2):569-584.
  • 6[6]Richardson T J,Urbanke R L.The capacity of low-density parity-check codes under messagepassing decoding.IEEE Trans.on Info.Theory,2001,47(2):599-618.
  • 7[7]Hou Ji-lei,Siegel P H,Milstein L B.Performance analysis and code optimization of low density parity-check codes on Rayleigh fading channels.IEEE J.on Selected Areas in Communications,2001,19(5),924-934.
  • 8[8]Lu Ben,Wang Xiao-dong,Narayanan K R.LDPC-based space-time coded OFDM systems over correlated fading channels:performance analysis and receiver design.IEEE Trans.on Communications,2002,50(1):74-88.

同被引文献42

  • 1RG Gallager.Low Density Parity Check Codes[J].IRE Transactions on Information Theory,1962;8(1):21-28
  • 2Haotian Zhang.Design of Structured Regular LDPC Codes with Large Girth[J].IEEE Global Telecommunications Conference-Globecom,Dec 2003;22(1):4022-4027
  • 3Frank R.Kschischang,Brendan J.Frey.Factor Graphs and the Sum-Product Algorithm[J].IEEE Transitions on Information Theory,2001;47(2):498-519
  • 4Hov Jilei.Performance Analysis and Code Optimization of LDPC on Rayleigh fading channels[J].IEEE on Selected Areas in Communications,2001;19(5):924-934
  • 5Gallager R G.Low-density parity-check codes[J].IRE Transactions on Information Theory,1962,8(1):21-28.
  • 6Tanner R M.A recursive approach to low coplexity codes[J].IEEE Transactions on Information Theory,1981,27(5):533-547.
  • 7Richardson T J,Urbanke R L.Efficient encoding of low-density parity-check codes[J].IEEE Transactions on Information Theory,2001,47(2):638-656.
  • 8Richardson T J,Urbanke R L.The capacity of lowdensity parity-check codes under message-passing decoding[J].IEEE Transactions on Information Theory,2001,47(2):599-618.
  • 9Richardson T J,Shokrollahi M A,Urbanke R L.Design of capacity-approaching irregular low density parity-check codes[J].IEEE Transactions on Infor mation Theory,2001,47(2):619-637.
  • 10Hou J L,Siegel P H,Nlilstein L B.Perforance analysis and optimization of low density parity check codes on Rayleigh channels[J].IEEE Journal on Selected Area in Communication,2001,19 (5):924-934.

引证文献5

二级引证文献7

电子与信息学报
2004年 第8期

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