Results 41 to 50 of about 1,022 (162)
On the design of multiuser codebooks for uplink SCMA systems [PDF]
, 2016 Sparse code multiple access (SCMA) is a promising uplink multiple access technique that can achieve superior spectral efficiency, provided that multidimensional codebooks are carefully designed.
Bao, J. +4 more
core +1 more source
Simplified Multiuser Detection for SCMA with Sum-Product Algorithm
, 2015 Sparse code multiple access (SCMA) is a novel non-orthogonal multiple access technique, which fully exploits the shaping gain of multi-dimensional codewords.
Chen, Zhiyong +4 more
core +1 more source
A Multi-user Detection Algorithm for SCMA System with Low Complexity [PDF]
Jisuanji gongcheng, 2018 As a novel Non-Orthogonal Multiple Access(NOMA) technology,Sparse Code Multiple Access(SCMA) can meet the performance requirements of massive connections for 5G,but the Message Passing Algorithm(MPA) has the problems of slow convergence and high ...
CHEN Fatang,JIA Dongsheng,GENG Mingyue
doaj +1 more source
Iterative detection and decoding for SCMA systems with LDPC codes
, 2015 Sparse code multiple access (SCMA) is a promising multiplexing approach to achieve high system capacity. In this paper, we develop a novel iterative detection and decoding scheme for SCMA systems combined with Low-density Parity-check (LDPC) decoding. In
Chen, Zhiyong +5 more
core +1 more source
A New Multiple Access Technique for 5G: Power Domain Sparse Code Multiple Access (PSMA)
IEEE Access, 2018 In this paper, a new approach for multiple access in the fifth generation (5G) of cellular networks called power domain sparse code multiple access (PSMA) is proposed. In PSMA, we adopt both the power domain and the code domain to transmit multiple users'
Mohammad Moltafet +4 more
doaj +1 more source
, 2014 Multicarrier CDMA is a multiple access scheme in which modulated QAM symbols are spread over OFDMA tones by using a generally complex spreading sequence. Effectively, a QAM symbol is repeated over multiple tones.
Baligh, Hadi +3 more
core +1 more source
Asynchronous Flipped Grant-Free SCMA for Satellite-Based Internet of Things Communication Networks
Applied Sciences, 2019 Sparse code multiple access (SCMA) is a promising code domain non-orthogonal multiple-access scheme which is able to support massive connectivity and grant-free transmission in future satellite-based Internet of Things (IoT) communication networks ...
Pengxu Li, Gaofeng Cui, Weidong Wang
doaj +1 more source
Performance analysis of 5-ary MUSA and SCMA for uplink transmission [PDF]
, 2019 Multiple access is one of the core technologies of wireless communications, which enables wireless base stations to deal with a large number of different users and provide the service for each of them at the same time.
Eldien, Adly S. Tag +3 more
core +2 more sources
K$K$‐user cyclic shift‐aided serial concatenated code for Gaussian multiple access channel
IET Communications, Volume 19, Issue 1, January/December 2025.A K‐user cyclic shift‐aided serial concatenated code (SCC) is proposed over a Gaussian multiple access channel. In this code, a cyclic shift‐aided SCC, which integrates a regular repeat‐accumulate code with rate‐1/q$1/q$ and cyclic shift spreading (CSS), is employed for each user. This change avoids complex interleaving operation and the main objective
Meilin He +4 more
wiley +1 more source
SCMA with Low Complexity Symmetric Codebook Design for Visible Light Communication
, 2017 Sparse code multiple access (SCMA) is attracting significant research interests currently, which is considered as a promising multiple access technique for 5G systems.
Gao, Qian +3 more
core +1 more source