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Definition
Sparse code multiple access (SCMA) is a nonorthogonal multiple access technique based on codebooks of sparse structure.
Historical Background
Future 5G wireless networks are expected to support massive connectivity, higher throughput, lower latency, and lower controlling signal overhead. Compared with the conventional orthogonal multiple access techniques such as code division multiple access(CDMA) and orthogonal frequency division multiple access (OFDMA) utilized in current networks, nonorthogonal multiple access (NOMA), which has the advantage of higher resource utilization, is more promising in 5G network.
Motivated by the design of CDMA chip sequences, the idea of sparse spreading, called Low Density Signature (LDS), was first proposed by Reza Hoshyar (Hoshyar et al. 2008). LDS is a special case of multicarrier CDMA with a few nonzero elements in a long spreading signature. This sparsity characteristic can reduce the complexity...
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References
Au K, Zhang L, Nikopour H, Yi E, Bayesteh A, Vilaipornsawai U, Ma J, Zhu P (2014) Uplink contention based scma for 5g radio access. In: Globecom workshops (GC Wkshps), 2014. IEEE, Austin, US pp 900–905
Bayesteh A, Yi E, Nikopour H, Baligh H (2014) Blind detection of SCMA for uplink grant-free multiple-access. In: International symposium on wireless communications systems. IEEE, Barcelona, Spain pp 853–857
Boutros J, Viterbo E, Rastello C, Belfiore J-C (1996) Good lattice constellations for both Rayleigh fading and Gaussian channels. IEEE Trans Inf Theory 42(2):502–518
Cheng M, Wu Y, Chen Y (2015) Capacity analysis for non-orthogonal overloading transmissions under constellation constraints. In: International conference on wireless communications & signal processing. IEEE, Nanjing China pp 1–5
Hoshyar R, Wathan FP, Tafazolli R (2008) Novel low-density signature for synchronous CDMA systems over AWGN channel. IEEE Trans Signal Process 56(4):1616–1626
Hoshyar R, Razavi R, Al-Imari M (2010) LDS-OFDM an efficient multiple access technique. In: Proceedings of the IEEE 71st vehicular technology conference (VTC 2010-Spring), 2010. IEEE, Taipei, Taiwan pp 1–5
Li Z, Chen W, Wei F, Wang F, Xu X, Chen Y (2016) Joint codebook assignment and power allocation for SCMA based on capacity with Gaussian input. In: IEEE/CIC international conference on communications in China. IEEE, Chengdu, China pp 1–6
Liu T, Li X, Qiu L (2015) Capacity for downlink massive mimo muscma system. In: International conference on wireless communications & signal processing. IEEE, Nanjing China pp 1–5
Mu H, Ma Z, Alhaji M, Fan P, Chen D (2015) A fixed low complexity message pass algorithm detector for up-link SCMA system. IEEE Wireless Commun Lett 4(6):585–588
Nikopour H, Baligh H (2013) Sparse code multiple access. In: 2013 IEEE 24th international symposium on personal indoor and mobile radio communications (PIMRC). IEEE, London UK pp 332–336
Nikopour H, Yi E, Bayesteh A, Au K, Hawryluck M, Baligh H, Ma J (2014) SCMA for downlink multiple access of 5g wireless networks. In: Global communications conference (GLOBECOM), 2014 IEEE. IEEE, Austin USA pp 3940–3945
Razavi R, Imran MA, Tafazolli R (2011) Exit chart analysis for turbo LDS-OFDM receivers. In: Proceedings of the 7th international wireless communications and mobile computing conference (IWCMC), 2011. IEEE, Istanbul, Turkey pp 354–358
Razavi R, Al-Imari M, Imran MA, Hoshyar R, Chen D (2012) On receiver design for uplink low density signature OFDM (LDS-OFDM). IEEE Trans Commun 60(11):3499–3508
Taherzadeh M, Nikopour H, Bayesteh A, Baligh H (2014) SCMA codebook design. In: 2014 IEEE 80th vehicular technology conference (VTC Fall). IEEE, Vancouver, Canada pp 1–5
Wei F, Chen W (2017) Low complexity iterative receiver design for sparse code multiple access. IEEE Trans Commun 65(2):621–634
Yu L, Lei X, Fan P, Chen D (2015) An optimized design of SCMA codebook based on star-QAM signaling constellations. In: International conference on wireless communications & signal processing. IEEE, Nanjing China pp 1–5
Zou J, Zhao H, Li X (2016) A low-complexity tree search based quasi-ml receiver for SCMA system. In: IEEE international conference on computer and communications. IEEE, Chengdu China pp 319–323
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Li, Z., Chen, W. (2018). Sparse Code Multiple Access. In: Shen, X., Lin, X., Zhang, K. (eds) Encyclopedia of Wireless Networks. Springer, Cham. https://doi.org/10.1007/978-3-319-32903-1_41-1
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DOI: https://doi.org/10.1007/978-3-319-32903-1_41-1
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