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一種改進基于門限的稀疏碼多址接入低復雜度多用戶檢測算法

楊維 趙懿偉 侯健琦

楊維, 趙懿偉, 侯健琦. 一種改進基于門限的稀疏碼多址接入低復雜度多用戶檢測算法[J]. 電子與信息學報, 2018, 40(5): 1044-1049. doi: 10.11999/JEIT170647
引用本文: 楊維, 趙懿偉, 侯健琦. 一種改進基于門限的稀疏碼多址接入低復雜度多用戶檢測算法[J]. 電子與信息學報, 2018, 40(5): 1044-1049. doi: 10.11999/JEIT170647
YANG Wei, ZHAO Yiwei, HOU Jianqi . An Improved Threshold-based Low Complexity Multiuser Detection Scheme for Sparse Code Multiple Access System[J]. Journal of Electronics & Information Technology, 2018, 40(5): 1044-1049. doi: 10.11999/JEIT170647
Citation: YANG Wei, ZHAO Yiwei, HOU Jianqi . An Improved Threshold-based Low Complexity Multiuser Detection Scheme for Sparse Code Multiple Access System[J]. Journal of Electronics & Information Technology, 2018, 40(5): 1044-1049. doi: 10.11999/JEIT170647

一種改進基于門限的稀疏碼多址接入低復雜度多用戶檢測算法

doi: 10.11999/JEIT170647
基金項目: 

國家重點研發(fā)計劃(2016YFC0801800),國家自然科學基金(51474015)

An Improved Threshold-based Low Complexity Multiuser Detection Scheme for Sparse Code Multiple Access System

Funds: 

The National Key Research and Development Program of China (2016YFC0801800), The National Natural Science Foundation of China (51474015)

  • 摘要: 稀疏碼多址接入(Sparse Code Multiple Access, SCMA)作為一種基于多維碼本的非正交多址技術(shù),能有效滿足5G的巨連接、高頻譜效率和毫秒級時延需求。針對基于門限的消息傳遞算法(Message Passing Algorithm, MPA)存在低門限時誤比特率(Bit Error Rate, BER)較高的問題,該文提出一種改進的SCMA多用戶檢測算法。所提出的算法在基于門限MPA的基礎(chǔ)上,增加了對用戶節(jié)點穩(wěn)定性必要條件的判決,即只有符合門限條件并通過用戶節(jié)點穩(wěn)定性必要條件判決的用戶才能被提前解碼。這提高了提前判決碼字的可靠性并減少了因變相硬判的檢測機制造成的后驗軟信息損失。與基于門限的MPA相比,所提出的算法可使消息在低門限時迭代得更加充分,從而在低門限時仍然能夠使SCMA用戶獲得較好的BER性能。仿真結(jié)果表明,在低門限時采用該文所提出的算法SCMA用戶BER性能明顯好于僅采用基于門限的MPA的BER性能。
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    廉晉, 周世東, 張秀軍, 等. 超蜂窩架構(gòu)下基于跳碼的SCMA控制信道接入設(shè)計[J]. 中國科學:信息科學, 2017, 47(6): 789-799. doi: 10.1360/N112017-00038.
    LIAN Jin, ZHOU Shidong, ZHANG Xiujun, et al. An SCMA control channel accessing scheme based on codebook-hopping under hyper-cellular network architecture[J]. Scientia Sinica (Informationis), 2017, 47(6): 789-799. doi: 10.1360/ N112017-00038.
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    XIAO Kexin, XIAO Baicen, ZHANG Shutian, et al. Simplified multiuser detection for SCMA with sum-product algorithm[C]. 2015 International Conference on Wireless Communications Signal Processing (WCSP), Nanjing, China, 2015: 1-5. doi: 10.1109/WCSP.2015.7341328.
    DU Yang, DONG Binhong, CHEN Zhi, et al. A fast convergence multiuser detection scheme for uplink SCMA systems[J]. IEEE Wireless Communications Letters, 2016, 5(4): 388-391. doi: 10.1109/LWC.2016.2565581.
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    DU Yang, DONG Binhong, WANG Xianjun, et al. Multiuser detection scheme for SCMA systems based on serial strategy[J]. Journal of Electronics Information Technology, 2016, 38(8): 1888-1893. doi: 10.11999/JEIT151259.
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  • 文章訪問數(shù):  1137
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  • 被引次數(shù): 0
出版歷程
  • 收稿日期:  2017-07-05
  • 修回日期:  2017-12-08
  • 刊出日期:  2018-05-19

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