Results 51 to 60 of about 475 (165)

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

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, Nader Mokari, Mohammad Reza Javan, Hamid Saeedi, Hossein Pishro-Nik   +4 more
doaj   +1 more source

Secure Transmission With Randomized Constellation Rotation for Downlink Sparse Code Multiple Access System [PDF]

, 2018
Sparse code multiple access (SCMA) is a promising candidate air interface of next-generation mobile networks. In this paper, we focus on a downlink SCMA system where a transmitter sends confidential messages to multiple users in the presence of external ...
Lei, Jing, Ke Lai, Li, Wei, Wei Li, Pei Xiao, Chen, Gaojie, Gaojie Chen, Lei Wen, Wen, Lei, Xiao, Pei, Jing Lei, Lai, Ke   +11 more
core   +2 more sources

Hybrid Rate-Splitting and Sparse Code Multiple Access (RS-SCMA): Design and Performance

IEEE Transactions on Communications
This paper proposes, for the first time, a hybrid multiple access framework that integrates the principles of rate-splitting (RS) and sparse code multiple access (SCMA) in an SISO downlink scenario. The proposed scheme, termed RS-SCMA, unifies the powerful interference management capability of rate-splitting multiple access (RSMA) with the near-optimal
Minerva Priyadarsini, Zilong Liu 0001, Kuntal Deka, Sujit Kumar Sahoo, Sanjeev Sharma 0001   +4 more
openaire   +2 more sources

Sparse Code Multiple Access-Based Edge Computing for Iot Systems [PDF]

, 2019
In this paper, a sparse code multiple access (SCMA)-based edge computing scheme is proposed for Internet-of- Things (IoT) systems. The aim of implementing SCMA, which is a nonorthogonal multiple access resource allocation technique, is to improve network
Anpalagan, Alagan, Alnoman, Ali, Erküçük, Serhat   +2 more
core   +1 more source

Joint uplink PD-NOMA and SCMA for future multiple access systems [PDF]

, 2021
International audienceIn this paper, we propose an uplink system which combines power-domain non-orthogonal multiple access (PD-NOMA) and sparse code multiple access (SCMA) together, in order to enable massive user connectivity.
Fu, Xiaotian, Xiaotian Fu, Le Ruyet, Didier, Pischella, Mylene, Didier Le Ruyet, Mylene Pischella   +5 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

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, Mingjue Zhu, Zhaoyang Zhang, Rui Guo, Haiquan Wang   +4 more
wiley   +1 more source

Secure Transmission with Interleaver for Uplink Sparse Code Multiple Access System [PDF]

, 2018
Sparse code multiple access (SCMA) is a promising air interface candidate technique for next generation mobile networks. By introducing the Tent map in the Chaos theory, we propose a novel physical layer transmission scheme with codeword level ...
Wen, Lei, L Wen (7696007), Xiao, Pei, G Chen (7052081), Chen, Gaojie, J Lei (7794263), Lai, Ke, Maaref, Amine, K Lai (7794260), A Maaref (7794269), Lei, Jing, P Xiao (7794266)   +11 more
core   +4 more sources

Scheme Design of SR‐DCSK‐WPC System With Energy Buffer in RIS‐Assisted Design

IET Communications, Volume 19, Issue 1, January/December 2025.
This research examines the performance improvement of chaotic communication assisted by reconfigurable intelligent surface. Currently, our paper explores the time switching scheme of SWIPT system and the time allocation characteristics of short reference technology, and reconstructs the implementation scheme of the time allocation coefficient.
Gongquan Zhang, Yu Ren, Xiaoting Chen, Xulai Zhu   +3 more
wiley   +1 more source