Results 11 to 20 of about 30,188 (287)
Low-complexity hybrid interference cancellation for sparse code multiple access
EURASIP Journal on Wireless Communications and Networking, 2022 Sparse Code Multiple Access (SCMA) is one of Non Orthogonal Multiple Access (NOMA) candidates for 5G, the fifth generation mobile network. Multiple overlapped blocks of SCMA code are transmitted per frequency layer which compels the receiver to cancel ...
Bilal Ghani +4 more
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Research on Sparse Code Multiple Access Technology [PDF]
Journal of Physics: Conference Series, 2021 Abstract As an important port technology in mobile communication, multiple access can effectively improve the number of user access in the communication system. However, the Orthogonal Multiple Access (OMA) technology has been unable to meet the higher requirements of spectrum efficiency and system capacity in the future, so it is of ...
Yujie Chen, Caihong Ma
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Sparse Code Multiple Access (SCMA) Technique [PDF]
, 2023 Next-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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HARQ scheme for sparse code multiple access based on network coding
Tongxin xuebao, 2022 To fulfill the stringent reliability and throughput demand of the beyond-5G and the forthcoming 6G, a novel network coding (NC) based hybrid automatic retransmission request (HARQ) for low-density parity check (LDPC) coded SCMA was proposed.Two ...
Ke LAI, Jing LEI, Wei LIU, Lei WEN
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Reconfigurable Intelligent Surface-Assisted Uplink Sparse Code Multiple\n Access [PDF]
IEEE Communications Letters, 2020 5 pages, 5 figures, to be appeared on IEEE Communications ...
Ibrahim Al-Nahhal +2 more
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Codeword Position Index Based Sparse Code Multiple Access System [PDF]
IEEE Wireless Communications Letters, 2018 In this letter, a novel variation of sparse code multiple access (SCMA), called codeword position index based SCMA (CPI-SCMA), is proposed. In this scheme, the information is transmitted not only by the codewords in M point SCMA codebook, but also by the indices of the codeword positions in a data block.
Ke Lai +5 more
+9 more sources
A Tutorial to Sparse Code Multiple Access [PDF]
, 2021 Sparse Code Multiple Access (SCMA) is an enabling code-domain non-orthogonal multiple access (NOMA)scheme for massive connectivity and ultra low-latency in future machine-type communication networks. As an evolved variant of code division multiple access (CDMA), multiple users in SCMA are separated by assigning distinctive codebooks which display ...
Saumya Chaturvedi +4 more
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Hybrid Rate-Splitting and Sparse Code Multiple Access (RS-SCMA): Design and Performance [PDF]
This paper presents a novel rate-splitting sparse code multiple access (RS-SCMA) framework, where common messages are transmitted using quadrature phase-shift keying (QPSK) modulation, while private messages are sent using SCMA encoding. A key feature of RS-SCMA is its ability to achieve a tunable overloading factor by adjusting the splitting factor ...
Minerva Priyadarsini +4 more
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Low-Cost Uplink Sparse Code Multiple Access for Spatial Modulation [PDF]
IEEE Transactions on Vehicular Technology, 2019 Spatial modulation (SM)-sparse code multiple access (SCMA) systems provide high spectral efficiency (SE) at the expense of using a high number of transmit antennas. To overcome this drawback, this letter proposes a novel SM-SCM A system operating in uplink transmission, referred to as rotational generalized SM-SCMA (RGSM-SCMA). For the proposed system,
Ibrahim Al-Nahhal +3 more
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Sparse Kronecker-Product Coding for Unsourced Multiple Access [PDF]
IEEE Wireless Communications Letters, 2021 Submitted to IEEE Wireless Communications ...
Zeyu Han +4 more
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