Results 211 to 220 of about 7,220 (258)
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Index modulation aided OTFS for SCMA system
China CommunicationsIn this paper, an index modulation (IM) aided uplink orthogonal time frequency space modulation (OTFS) structure for sparse code multiple access (SCMA) is proposed.
Chunlin He +5 more
semanticscholar +1 more source
Low Complexity MIMO-SCMA Detector
2019 IEEE 5th International Conference on Wireless and Telematics (ICWT), 2019The implementation of Multiple Input Multiple Output (MIMO) on the Sparse Code Multiple Access (SCMA) can enhance performance in 5G future communication. Low complexity detector for the MIMO-SCMA system to achieve near-optimum bit error rate (BER) performance is still hot topic in this research field.
Dayat Kurniawan +2 more
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User capacity for uplink SCMA system
Physical Communication, 2020Abstract Sparse Code Multiple Access (SCMA) is a non-orthogonal multiple access (NOMA) scheme which allows multi-user communication with massive connectivity. In this paper, we consider an uplink SCMA network of limited resources (time/frequency/power). We seek to answer the following question: what is the maximum number of users that can be admitted
Doaa Gamal +2 more
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Implementation of a HARQ-Assisted Hybrid SCMA-OMA System Using USRP
International Conference on Wireless Communications and Signal ProcessingTo support massive connectivity in the future Internet of Things (IoT), sparse code multiple access (SCMA) is recognized as a promising technique with high spectral efficiency within limited time and frequency resources.
Zhonghao Li +6 more
semanticscholar +1 more source
Uplink SCMA-empowered Uncoordinated Random Access for Future mMTC
IEEE Transactions on Vehicular TechnologyIn this paper, a novel uncoordinated random access (URA) protocol is presented to address the pressing demand for massive connectivity with low access latency in future massive machine type communication (mMTC) scenarios.
Pengyu Gao +5 more
semanticscholar +1 more source
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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System-level performance estimation of SCMA
2016 IEEE International Conference on Communication Systems (ICCS), 2016Sparse code multiple access (SCMA) is a novel non-orthogonal multiple access technique, which enjoys the low complexity of message passing algorithm (MPA) and the shaping gain of multidimensional codewords. The performance of SCMA is usually evaluated by the system level simulation and represented by the block error rate (BLER) as a metric.
Ce Sun +6 more
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Research on Receiver Optimization Algorithm for SCMA System Based on Deep Learning
2025 IEEE 5th International Conference on Electronic Technology, Communication and Information (ICETCI)Sparse code multiple access (SCMA) is an important non-orthogonal multiple access technology for 5G and subsequent communication technologies, and its performance optimization is of great significance to wireless communication systems.
Han Wu
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RBF-SCMA: Faster Machine Learning Based SCMA
ICC 2022 - IEEE International Conference on Communications, 2022Ameya Vikram +3 more
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High SNR SCMA Detection via Transfer Learning From Low SNR Region
IEEE Internet of Things JournalSparse code multiple access (SCMA) is a competitive candidate multiple access technology for future wireless communication systems. In this article, a transfer learning (TL)-based SCMA detection scheme is proposed to improve the performance of the deep ...
Yuhao Zheng +5 more
semanticscholar +1 more source