Results 11 to 20 of about 255,246 (314)
Next-Generation Passive Optical Network Based on Sparse Code Multiple Access and Graph Neural Networks [PDF]
IEEE Photonics Journal, 2022 Sparse code multiple access (SCMA) is a promising technology to provide high throughput and overall improved system performance at affordable cost for next-generation passive optical networks (NG-PONs).
Hui Yang +4 more
doaj +2 more sources
Downlink Multiple Input Multiple Output Mixed Sparse Code Multiple Access for 5G System
IEEE Access, 2018 For downlink multiple-input multiple-output-sparse code multiple access (MIMO-SCMA) system, the convergence reliability of the detected codeword in each decision process is unsatisfactory at the message passing algorithm receiver. To address this problem,
Cheng Yan, Ningbo Zhang, Guixia Kang
doaj +2 more sources
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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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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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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IEEE Open Journal of the Communications Society, 2021 Non-orthogonal Multiple Access (NOMA) has been envisioned as one of the key enabling techniques to fulfill the requirements of future wireless networks. The primary benefit of NOMA is higher spectrum efficiency compared to Orthogonal Multiple Access (OMA)
Qu Luo +6 more
doaj +2 more sources
Multiple Access With Polarity Division Sparse Code for Visible Light Communication [PDF]
IEEE Photonics Journal, 2019 The increasing demand of mobile internet and Internet of Things poses challenging requirements for indoor wireless communication. Visible light communication (VLC) is a promising technology to alleviate the growing traffic problem. In addition, nonlinear
Yu Xiao, Zhitong Huang, Yuefeng Ji
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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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Impact of Factor Graph on Average Sum Rate for Uplink Sparse Code Multiple Access Systems [PDF]
IEEE Access, 2016 In this paper, we first study the average sum rate of sparse code multiple access (SCMA) systems, where a general scenario is considered under the assumption that the distances between the mobile users and the base station are not necessarily identical ...
Zheng Yang +5 more
doaj +3 more sources