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SCIENTIA SINICA Informationis, Volume 47 , Issue 6 : 789-799(2017) https://doi.org/10.1360/N112017-00038

An SCMA control channel accessing scheme based on codebook-hopping under hyper-cellular network architecture

More info
  • ReceivedFeb 15, 2017
  • AcceptedMar 27, 2017
  • PublishedJun 13, 2017

Abstract


Funded by

国家重点基础研究发展计划(973)(2012CB316002)

国家高技术研究发展计划(863)(2015AA01A701)

国家自然科学基金(61201192,61631013)

国家科技重大专项课题(2016ZX03001009)

清华大学自主科研项目(2015Z02-3)

  • Figure 1

    (Color online) SCMA factor graph when all users adopt different codebook. $L=4$, $N=2$, $K=6$, $U=6$

  • Figure 2

    (Color online) SCMA factor graph when codebook collision occurs on codebook 3

  • Figure 3

    (Color online) Codebook collision pattern under codebook-hopping SCMA scheme

  • Figure 4

    (Color online) Codebook collision pattern under original SCMA scheme

  • Figure 5

    (Color online) BLER of different schemes

  • Figure 6

    (Color online) Complexity of different schemes

  • Table 1   Codebook collision situations with their corresponding probability
    $\alpha$ b Probability
    1 [6] 0.002%
    3[0]*2
    [5,1] 0.39%
    [4,2] 3.86%
    [3,3] 0.64%
    2[0]*3
    [4,1,1] 0.97%
    [3,2,1] 15.43%
    2[0]*4
    [3,1,1,1] 15.43%
    [2,2,1,1] 34.73%
    5 [2,1,1,1,1] 23.15%
    6 [1,1,1,1,1,1] 1.54%
  • Table 2   Simulation parameter
    Meaning Simulation parameter
    Average accessing users $U$ 6
    Resources per SCMA sub-block $L$ 4
    Resources taken up per user per SCMA sub-block $N$ 2
    SCMA codebook numbers $J$ 6
    SCMA mother constellation size $M$ 16
    SCMA sub-block size 4 bits
    Information block size 200 bits
    Coding efficiency of turbo code 2/3
    Channel model Block fading, Gaussian channel
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