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时变信道中自适应VR-HARQ研究 被引量：2

An Adaptive VR-HARQ for Time-Varying Channels
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摘要 为了更好地解决时变信道中可靠性与吞吐率这一对矛盾,本文提出一种基于线性预测的自适应冗余可变混合ARQ(VR-HARQ)方案.在该方案中,由于时变信道的慢衰落特性,时变信道被等效为有限状态的M arkov过程,每个M arkov状态对应信道的不同信噪比,同时,文章详细地描述了信道吞吐率与误码率之间的数学关系,推导了每个M arkov状态的最佳编码方案,然后系统采用自适应线性预测算法,根据当前个时段的信道状态,估计下一个时段信道的信噪比以及其所对应的M arkov状态,最后根据吞吐率最大原则选择合适的纠错编码方案.仿真结果表明:自适应线性预测VR-HARQ方案的性能明显优于传统VR-HARQ方案. For time-varying channel, the reliability of data transmission contradicts with the throughput efficiency. To solve the problem, the paper proposed a new VR-HARQ （Variable Redundancy Hybrid-ARQ） scheme based on the adaptive line predictor. Assumed that the fading of the time-varying channel is slow, the channel is equivalent to a finite-markov process, where each Markov state corresponds different BER. Simultaneity, the paper derives the best channel coding scheme for each Markov state. Based on the current time slot＇ s channel states, the next time slot＇ s channel state is predicted using adaptive line predictor algorithm. Then the best channel coding scheme is selected to maximize the channel throughput efficiency. Simulation results showed that the performance of the new scheme is better than that of the traditional schemes.
作者 黄忠虎 沈连丰 李文峰 徐智勇
机构地区 东南大学移动通信国家重点实验室
出处 《电子学报》 EI CAS CSCD 北大核心 2006年第4期690-694,共5页 Acta Electronica Sinica
基金 国家自然科学基金(No.60472053) 江苏省自然科学基金(No.BK2003055) 高等学校博士学科点专项科研基金(No.20030286017) 江苏省高技术研究项目(No.BG2005001)
关键词 时变信道 VR-HARQ 自适应线性预测 吞吐率 差错控制 time-varying channel VR-HARQ adaptive line predictor throughput efficiency error control
分类号 TN929.5 [电子电信—通信与信息系统]
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参考文献8

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同被引文献12

  • 1TALAVAGE J L, THIEL T E, BRADY D. An efficient store- and-forward protocol for a shallow-water coustic local area net- work[J]. IEEE, 1994,1:883-888.
  • 2Cao Rui, Yang Liuqing. Reliable relay-aided underwater acous- tic communications with Hybrid DLT codes [ C ]. Proceedings of Military Communications Conference, 2011,8069 ( 5 ) :412-417.
  • 3CASARI P, HARRIS A F. Energy-efficient reliable broadcast in underwater acoustic networks [ C ]. Workshop on Underwater Networks, 2007 ( 7 ) :49-56.
  • 4Zhuang Haojie, TAN H P, VALERA A, et al. Opportunistic ARQ with bidirectional overhearing for reliable multihop under- water networking[ C]. In IEEE OCEANS, 2010: 5-10.
  • 5TALAVAGE J L, THIEL T E, BRADY D. An efficient store- and-forward protocol for a shallow-water coustic local area net- work[J]. IEEE, 1994,1:883-888.
  • 6Cao Rui, Yang Liuqing. Reliable relay-aided underwater acous- tic communications with Hybrid DLT codes[ C]. Proceedings of Military Communications Conference, 2011,8069 ( 5 ) :412-417.
  • 7CASARI P, HARRIS A F. Energy-efficient reliable broadcast in underwater acoustic networks [ C ]. Workshop on Underwater Networks, 2007 ( 7 ) :49-56.
  • 8Zhuang Haojie, TAN H P, VALERA A, et al. Opportunistic ARQ with bidirectional overhearing for reliable multihop under- water networking[C]. In IEEE OCEANS, 2010: 5-10.
  • 9DALY E M, HAAHR M. Social network analysis for routing in disconnected delay-tolerant manets[C]. In Proc. of MobiHoc, 2007 : 32 -40.
  • 10YONEKI E, HU1 P, CHAN S, et al. A socio-aware overlay for publish/subscribe communication in delay tolerant networks[ C ]. In Proc. of MSWiM, 2007:225-234.

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电子学报
2006年 第4期

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