Results 221 to 230 of about 7,220 (258)

Joint SIC and SCMA for NOMA-Based Uplink Transmission in 5G Systems

International Conference on Advanced Communication Technology
With higher access capacity, non-orthogonal multiple access (NOMA) is a promising wireless access technology to meet the demands of massive machine-type communications (mMTC) and internet of things (IoT) applications.
S. Su, Nan-Hsiung Huang, Chao-Lin Chen, Kuei-Chiang Lai   +3 more
semanticscholar   +1 more source

Low-complexity codebook design for SCMA-assisted indoor visible light communication systems

China Communications
Sparse code multiple access (SCMA) is a non-orthogonal multiple access (NOMA) scheme based on joint modulation and spread spectrum coding. It is ideal for future communication networks with a massive number of nodes due to its ability to handle user ...
Wang Yuhao, Xu Chuan, Yu Lisu, Lyu Xinxin, Junyuan Chen, Zhenghai Wang   +5 more
semanticscholar   +1 more source

Low Complexity Techniques for SCMA Detection

2015 IEEE Globecom Workshops (GC Wkshps), 2015
Sparse code multiple access (SCMA) is a codebook- based non-orthogonal multiplexing technique. In SCMA, the procedure of bit to QAM symbol mapping and spreading of CDMA are combined together and incoming bits are directly mapped to multi-dimensional codewords of SCMA codebook sets.
Alireza Bayesteh, Hosein Nikopour, Mahmoud Taherzadeh, Hadi Baligh, Jianglei Ma   +4 more
openaire   +1 more source

CWGAN-Based Channel Modeling of Convolutional Autoencoder-Aided SCMA for Satellite-Terrestrial Communication

IEEE Internet of Things Journal
Sparse code multiple access (SCMA) has excellent application prospects in satellite-terrestrial links because of its high spectral efficiency and access capacity.
Dongbo Li, Xiangyu Liu, Zhisheng Yin, Nan Cheng, Jie Liu   +4 more
semanticscholar   +1 more source

Weighted message passing algorithm for SCMA

2015 International Conference on Wireless Communications & Signal Processing (WCSP), 2015
Sparse code multiple access (SCMA) is a new frequency domain non-orthogonal multiple-access technique which can make full use of limited spectrum resources in wireless communication system. In SCMA, multiple users share the same time-frequency resources of orthogonal frequency division multiple access (OFDMA).
Dacheng Wei, Yuxi Han, Sihai Zhang, Lei Liu   +3 more
openaire   +1 more source

SVM-Based Factor Graph Design for Max-SR Problem of SCMA Networks

IEEE Communications Letters
In this letter, a novel factor graph design based on the support vector machine (SVM) is proposed to maximize the sum-rate (Max-SR) of three-dimensional (3D) SCMA networks.
Maryam Cheraghy, Meysam Soltanpour, H. B. Abdalla, A. Oveis   +3 more
semanticscholar   +1 more source

An Enhanced Multi-User SCMA Codebook Design Over an AWGN Channel

IEEE Communications Letters
Sparse code multiple access (SCMA) technology has become a research hotspot over the past decade, particularly the SCMA codebook design. The minimum Euclidean distance between superimposed codewords (MEDs) is a key performance indicator to measure the ...
Xiuping Peng, Donggang He, Hongbin Lin, Yubo Li   +3 more
semanticscholar   +1 more source

Performance characterization of an SCMA decoder

2016 14th IEEE International New Circuits and Systems Conference (NEWCAS), 2016
Characterization of a Sparse Code Multiple Access (SCMA) decoder is performed to measure its error performance and its time and hardware implementation complexity. SCMA is a non-orthogonal technique proposed to support massive connectivity in future 5G wireless telecommunication systems.
Roya Alizadeh, Normand Belanger, Yvon Savaria, Francois-R Boyer   +3 more
openaire   +2 more sources

Grant-Free SCMA Enhanced Mobile Edge Computing: Protocol Design and Performance Analysis

IEEE Internet of Things Journal
Sparse code multiple access (SCMA) and mobile edge computing (MEC) are two promising technologies for future Internet of Things (IoT) networks. SCMA enables large-scale connections, while MEC brings computing resources closer to user devices, resulting ...
Pengtao Liu, Kang An, Jing Lei, Yifu Sun, Wei Liu, S. Chatzinotas   +5 more
semanticscholar   +1 more source

Irregular SCMA Codebook Design

2021 IEEE 21st International Conference on Communication Technology (ICCT), 2021
Shuyan Ni, Tuofeng Lei, Naiping Cheng, Xin Song, Aidi Zhang, LingFeng Cheng   +5 more
openaire   +1 more source