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Sparse Code Multiple Access Over Universal Filtered Multicarrier
IEEE Transactions on Vehicular Technology, 2021In this paper, the uplink sparse code multiple access over universal filtered multicarrier (SCMA-UFMC) is studied. In SCMA-UFMC, each sub-band of UFMC is occupied by multiple users through SCMA. Note that the even-component of frequency domain (FD) received signal suffers from neither inter-sub-band interference nor inter-sub-carrier interference while
Changju Chen, Jianping Zheng, Fuping Si
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Cyclotomic Construction of Sparse Code Multiple Access With Improved Diversity
International Journal of Interdisciplinary Telecommunications and Networking, 2022A number of studies focus on sparse code multiple access (SCMA) to increase the spectral efficiency and support the massive connectivity required for future wireless communications networks. This work reports an improved design for SCMA based on algebraic number field theory and cyclotomic construction of a lattice.
Hussein Al-Hamdani +2 more
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Sparse Code Multiple Access (SCMA)
2018Sparse Code Multiple Access (SCMA) enables non-orthogonal transmissions of multiple users’ signals among code and power domain, which could greatly improve the spectral efficiency. Due to the sparsity of the multi-dimensional codewords, the low-complexity message-passing algorithm (MPA) can be adopted and near maximum likelihood (ML) performance for ...
Zheng Ma, Jinchen Bao
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A Novel Codebook Design Scheme for Sparse Code Multiple Access
2021The sparse code multiple access (SCMA) technology proposed by Huawei has become a very competitive one of many NOMA solutions due to its high overload capability. SCMA maps the user’s binary bit data input by the system’s sending end into a multi-dimensional complex number sequence through a pre-designed codebook, instead of the modulation and ...
Huanzhu Wang, Peihan Yu, Yue Yan
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Sparse Code and Hybrid Multiple Access Techniques
2020Next-generation wireless networks require higher spectral efficiency and lower latency to meet the demands of various upcoming applications. Recently, non-orthogonal multiple access (NOMA) schemes are introduced in the literature for 5G and beyond. Various forms of NOMA are considered like power domain, code domain, pattern division multiple access ...
Sanjeev Sharma, Kuntal Deka
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A LARGE-SCALE EXTENSION OF SPARSE-CODE MULTIPLE-ACCESS SYSTEM
2018 IEEE Global Conference on Signal and Information Processing (GlobalSIP), 2018Sparse-code multiple-access (SCMA) is an effective non-orthogonal multiple-access (NOMA) technique, which ranks one of the most promising candidates for future wireless, because of its outstanding performance. However, most of the existing work prefers low-connectivity SCMA systems, which actually cannot fulfill their priorities for massive connection.
Chao Yang 0027 +5 more
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Multi-User Detections for Sparse Code Multiple Access System
2018 IEEE 88th Vehicular Technology Conference (VTC-Fall), 2018This paper proposes a new multi-user detection scheme for sparse code multiple access (SCMA) system in grant- free scenario. SCMA systems use a message passing algorithm which considers all user equipments (UEs) to be active. However, in a practical system, UEs do not always request resources.
Joonki Kim, Daesik Hong
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A Tight Lower Bound for the Symbol Error Performance of the Uplink Sparse Code Multiple Access
IEEE Wireless Communications Letters, 2017 We derive a tight lower bound for symbol error rate (SER) performance of the sparse code multiple access (SCMA) uplink operated over Rayleigh fading channels.
Donghong Cai +2 more
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Iterative multiuser receiver in sparse code multiple access systems
2015 IEEE International Conference on Communications (ICC), 2015Sparse code multiple access (SCMA) is a novel non-orthogonal multiple access scheme, in which multiple users access the same channel with user-specific sparse codewords. In this paper, we consider an uplink SCMA system employing channel coding, and develop an iterative multiuser receiver which fully utilizes the diversity gain and coding gain in the ...
Yiqun Wu 0001 +2 more
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Performance Analysis of Sparse Code Multiple Access MIMO Systems
2019 IEEE 30th Annual International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC), 2019This paper addresses the implementation and performance analysis of sparse code multiple access (SCMA)-multiple–input multiple–output (MIMO) systems. SCMA is a promising technology to accommodate the ever–increasing number of users as well as spectral and bandwidth efficiency enhancements for next generations wireless systems.
Salma Elkawafi +2 more
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