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利于LDPC码对数似然比译码的自适应功率分配算法 被引量：1

Adaptive Algorithm Based on Log Likelihood Ratio Decoding of LDPC Coded Modulation
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摘要 提出了一种在低密度奇偶校验码(LDPC)编码的正交频分复用(OFDM)系统中,利于各子载波进行LDPC码对数似然比译码的自适应功率分配算法,根据信道条件调整各子载波的功率,使系统的译码性能达到最优.给出了该算法在多径衰落信道下的仿真,结果表明,自适应预处理算法对系统的误比特性能有了很大程度的提高. For beneficial of log likelihood ratio decoding of low-density parity-check （LDPC） coded modulation, an adaptive power allocation algorithm is proposed in orthogonal frequency division multi- plexing （OFDM） systems~ The transmit power allocated to sub-carriers is adjusted according to the channel gain of each sub-channel to optimize the decoding performance. Simulation results show that the algorithm can effectively improve the bit-error-rate performance of the system, adapting to the time-variant behavior of the multi-path fading channel.
作者 吴晓光 张治 邓钢 张平
机构地区 北京邮电大学电信工程学院
出处 《北京邮电大学学报》 EI CAS CSCD 北大核心 2007年第2期102-105,共4页 Journal of Beijing University of Posts and Telecommunications
基金 国家自然科学基金项目(60302025)
关键词 低密度奇偶校验码 正交频分复用 对数似然比译码 自适应 low-density parity-check orthogonal frequency division multiplexing log likelihood ratio decoding adaptive algorithm
分类号 TN911.22 [电子电信—通信与信息系统]
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参考文献6

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二级参考文献7

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共引文献2

同被引文献16

  • 1Laneman J N, Womell G W. Distributed space-time-coded protocols for exploiting cooperative diversity in wireless networks[J]. IEEE Trans Inform Theory, 2003, 49(10): 2415 -2425.
  • 2Sendonaris A, Erkip E, Aazhang U B. Cooperation diversity. partl: system description[J]. IEEE Trans Comm, 2003, 51(11): 1927-1938.
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  • 4Stefanov A, Erkip E. Cooperative coding for wireless networks[J]. IEEE Trans on Commun, 2004, 52(9): 1470-1476.
  • 5Duyck D, Boutros J J, Moeneclaey M. Low-density parity-check coding for block-fading relay charmels[C]//Proceedings of 2009 IEEE Information Theory Workshop. Taormina. Sicily, Italy, 2009: 248-252.
  • 6Richardson T J, Shokrollahi A, Urbanke R L. Design of capacity approaching irregular low-density parity-check codes[J]. IEEE Transactions on Information Theory, 2001, 2(47): 619-637.
  • 7Razaghi P, Yu W. Bilayer LDPC codes for decode-and-forward in relay channels[J]. IEEE Trans Inform Theory, 2007, 10(53): 3723-3739.
  • 8Razaghi P, Yu W. Bilayer LDPC codes for decode and forward in relay channels[J]. IEEE Trans Inform Theory, 2007, 53(10): 3723-3739.
  • 9Azmi M H, Yuan J H. Design of mult-edge type bilayer-expurgated LDPC codes[C]//Proceedings of 2009 IEEE International Symposim on Information Theory, ISTT 2009. Seoul, Korea, 2009:1988-1992.
  • 10Ardakani M. A linear programming approach to the design of LDPC codes for non-uniform channels[C]//Proceedings of 2006 IEEE International Conference on Communications. Istanbul, Turkey, 2006:1142-1147.

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北京邮电大学学报
2007年 第2期

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