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基于LDPC编码的IDMA编码和扩频均衡研究 被引量：3

A Study on Coding-Spreading Trade-Off in LDPC-Coded IDMA System
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摘要 将一种接近容量限的码型低密度奇偶校验码(LDPC)应用于交织多址接入系统,即基于LDPC编码的IDMA系统;深入研究了与此系统相关的编码和扩频的均衡问题。在高斯白噪声(AWGN)信道中,在以不同码率编码的该系统中,分别以误比特率10-6和10-3为标准,根据要达到的可靠数据和语音通信所需要的最小信噪比(SNR),阐明编码和扩频的均衡问题。仿真结果表明,在AWGN信道中,对于可靠的通信传输服务,基于LDPC编码的IDMA系统传输的最佳LD-PC编码码率在0.4和0.5之间;并且,以这种码率传输的系统相对于其他系统的优势是相当明显的。 A capacity-achieving low-density parity-check （LDPC） code is applied to interleave-division multipleaccess （IDMA） system, and the associated coding-spreading tradeoff problem is investigated. The required minimum SNR for reliable data and voice transmission based on the bit error rate （BER） of 10^-6 and 10^-3 over AWGN channel at different code rates are sought to explore the coding-spreading tradeoff. Simulation results show that the optimal LDPC code rates in LDPC-coded IDMA system are between 0. 4 and 0. 5 for reliable communication services over AWGN channel. The performance advantage of the proposed system is significant, compared with the traditional convolution-coded IDMA system at 0. 5 code-rate.
作者 包杰 罗尧 王琳
机构地区 重庆邮电大学应用技术学院 重庆邮电大学编码技术研究所 厦门大学通信工程系
出处 《微电子学》 CAS CSCD 北大核心 2007年第2期164-167,共4页 Microelectronics
基金 教育部新世纪优秀人才支持计划资助项目(NCET-04-0601)
关键词 交织多址接入 LDPC码 迭代接收 编码扩频均衡 IDMA LDPC code Iterative receiver Coding spreading trade-off
分类号 TN911.22 [电子电信—通信与信息系统]
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参考文献14

  • 1Reed M C,Schlegel C B,Alexander P D.et al.Iterative multiuser detection for CDMA with FEC:ear-single-user performance[J].IEEE Trans Commun,1998,46 (12):1693-1699.
  • 2Wang X D,Poor H V.Iterative (turbo) soft interference cancellation and decoding for coded CDMA[J].IEEE Trans Commun,1999,47(7):1046-1061.
  • 3Shi Z,Schlegel C.Joint iterative decoding of serially concatenated error control coded CDMA[J].IEEE J Select Areas Commun,2001,19(8):1646-1653.
  • 4Li P,Wu K Y,Liu L H.A simple,unified approach to nearly optimal multiuser detection and space-time coding[A].ITW 2002[C].India,2002.53-56.
  • 5Liu L H,Leung W K,Li P.Simple chip-by-chip multi-user detection for CDMA systems[A].IEEEVTC[C].Korea,2003.2157-2161.
  • 6Viterbi A J.Very low rate convolutional codes for maximum theoretical performance of spread spectrum multiple-access channels[J].IEEE J Select Areas Commun,1990,8(8):641-649.
  • 7Verdú S,Shamai S.Spectral efficiency of CDMA with random spreading[J].IEEE Trans Inform Theory,1999,45(2):622-640.
  • 8Li P,Liu L H,Wu K Y,et al.Interleave division multiple access (IDMA) communication systems[A].3rd Int Symp Turbo Codes and Related Topics[C].France.2003.173-180.
  • 9Massey J L.Information theory aspects of spread-spectrum communications[A].ISSSTA'94[C].Finland,1994.16-20.
  • 10Veeravalli V V,Mantravadi A.The coding-spreading tradeoff in CDMA systems[J].IEEE J Select Areas Commun,2002,20(2):396-408.

二级参考文献9

  • 1曾蓉,梁钊.低密度校验(LDPC)码的构造及编码[J].重庆邮电学院学报（自然科学版）,2005,17(3):316-319. 被引量：12
  • 2WANG X D,POOR H V.Iterative (Turbo) soft interference cancellation and decoding for coded CDMA[J].IEEE Transactions on Communications,1999,47(7):1046-1061.
  • 3VITERBI A J.Very low rate convolutional codes for maximum theoretical performance of spread spectrum multiple-access channels[J].IEEE Journal on Selected Areas in Communications,1990,8(4):641-649.
  • 4VERDú S,SHAMAI S.Spectral efficiency of CDMA with random spreading[J].IEEE Transactions on Information Theory,1999,45(2):622-640.
  • 5LI P,LIU L H,WU K Y,et al.Interleave division multiple access (IDMA) communication systems[EB/OL].(2003-12-10)[2006-02-25].http://www.ee.cityu.edu.hk/～ liping/Research/Conference/IDMA3,pdf.
  • 6LIU L H,LEUNG W K,LI Ping.Simple chip-by-chip multi-user detection for CDMA systems[EB/OL].(2003-04-28)[2006-02-2].Http://www.Iris.Cityu.Edu.Hk/generalpublic/StaffResearchOutput_GP.Cfm?ASID=695 &Category=R.
  • 7WANG L,XIAO J,XU W K.Design and Simulation for Regular LDPC Codes[C].//Proc.2003 ICICS/IEEE.Taiwan,Dec.14th-16th,Taiwan:[s.n.],2003.
  • 8MAHADEVAPPA R H,PROAKIS J G.Mitigating multiple access interference and intersymbol Interference in uncoded CJMA Systems with chip-level interleaving[J].IEEE Trans.Wireless Commun.,2002,1(4):781-792.
  • 9RICHARDSON T,URBANKE R.The capacity of low-density paritycheck codes under message-passing decoding[J].IEEE Transactions on Information Theory,2000,47(2):599-618.

共引文献6

同被引文献9

引证文献3

二级引证文献1

微电子学
2007年 第2期

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