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OFDM系统非规则LDPC码优化设计 被引量：1

Optimized Irregular LDPC Codes Design for OFDM System
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摘要 提出了一种简单的非规则低密度校验码(LDPC)的优化设计方案.该方案充分考虑了正交频分复用(OFDM)信道的衰落特性,并利用LDPC码迭代译码原理,在衰落较大的子信道传输具有较高节点度的信息比特,在衰落较小的子信道传输具有较低节点度的信息比特.仿真结果表明,当码长为1 024,码率为1/2时,该方案与规则码相比,在误比特率为10-5时可以节省3 dB,且降低了设计最优码的复杂度. A simplified and optimized low density parity check （LDPC） codes for orthogonal frequency division multiplexing （OFDM） transmission is proposed. Making consideration of the channel fading characteristic and iterative decoding principle, high variable degree is used in deep fading sub-channel and low variable degree in light fading sub-channel. Simulation results show that the scheme exhibits a gain of 3 dB at bit error rate （BER） of 10 s when code length is 1 024 and code rate is 1/2 compared to regular codes and reduces the complexity of optimization design.
作者 温娜 路唯佳 刘翔 张平 陶晓峰
机构地区 北京邮电大学无线新技术研究所
出处 《北京邮电大学学报》 EI CAS CSCD 北大核心 2006年第4期107-110,共4页 Journal of Beijing University of Posts and Telecommunications
基金 国家"863计划"项目(2003AA12331004) 三星电子中国通信研究院资助项目
关键词 低密度校验码 正交频分复用 码优化设计 low density parity check code orthogonal frequency division multiplexing optimized code design
分类号 TP393.01 [自动化与计算机技术—计算机应用技术]
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参考文献5

  • 1Lu Ben, Wang Xiaodong, Narayanan K R. LDPC-based space-time coded OFDM systems over correlated fading channels: performance analysis and receiver design [J]. IEEE Transactions on Communications, 2002, 50(1):74-88.
  • 2林家儒,吴伟陵.LDPC码在RICE信道中的性能分析[J].北京邮电大学学报,2004,27(2):48-53. 被引量：14
  • 3宋挥师,张平.两种低密度校验码译码算法的性能比较与分析[J].北京邮电大学学报,2004,27(z2):217-221. 被引量：1
  • 4Mannoni V, Declercq D, Gelle G. Optimized irregular low-density parity-check codes for multicarrier modulations over frequency-selective channels [J]. EURASIP Journal on Applied Signal Processing, 2004, 10: 1546-1556.
  • 5Hou Jilei, Siegel P H, Milstein L B. Performance analysis and code optimization of low density parity-check codes on Rayleigh fading channels[J]. IEEE Journal on Selected Areas in Communications, 2001, 19(5): 924-934.

二级参考文献13

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共引文献13

同被引文献7

  • 1Lei Wei. Several properties of short LDPC codes [ J ]. IEEE Transactions on Communications, 2004, 52 ( 5 ) : 721-727.
  • 2Mao Yongyi, Banihashemi A H. A heuristic search for good low density parity-check codes at short block lengths [C]//Proc IEEE Int Conf Communications. Helsinki: [s.n. ], 2001: 11-14.
  • 3Chang Di, David P, Emre I T, et al. Finite-length analysis of low-parity check codes on the binary erasure channel [ J ]. IEEE Transactions on Information Theory, 2002, 48(6): 1570-1579.
  • 4Tian T, Jones C, Villasenor J D, et al. Construction of irregular LDPC codes with low errorfloors [ C ]//Proe IEEE Int Conf Communications. Anchorage: [s. n. ], 2003 : 3125-3129.
  • 5Pishro-Nik H, Fekri F. Results on punctured LDPC codes [ J ]. IEEE Information Theory workshop, 2004 (10) : 215-219.
  • 6Ha J, McLaughlin S W. Rate-compatible puncturing of low-density parity-check codes[J]. IEEE Transactions on Information Theory, 2004, 50(11) : 2824-2836.
  • 7Ko Y-J, Kim J-H. Girth conditioning for construction of short block length irregular LDPC codes [J ]. Electronics Letters, 2004, 40(3): 187-188.

引证文献1

二级引证文献2

北京邮电大学学报
2006年 第4期

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