Results 201 to 210 of about 7,220 (258)

A novel codeword grouped SCMA

2015 IEEE 6th International Symposium on Microwave, Antenna, Propagation, and EMC Technologies (MAPE), 2015
In the future 5G, the fast-growing requirements of massive connectivity, higher data-rate transmissions and multiple services should be matched with new multiple access technology. Non-orthogonal multiple access, nowadays, is considered as an effective method to solve those problems. Some non-orthogonal multiple access technologies, e.g.
Jun Wang, null Hui Zhao, null Yuexing Peng, null Sha Liu, null Senyao Zheng   +4 more
openaire   +1 more source

Downlink Error Performance Analysis of an SCMA Aided Cell-Free System With OTFS Modulation

IEEE Transactions on Vehicular Technology
The upcoming sixth-generation (6G) communications is expected to support reliable communications for dense wireless networks even with high-mobility users.
Amit Sravan Bora, Khoa T. Phan, Yi Hong
semanticscholar   +1 more source

Advanced Codebook Design for SCMA-Aided NTNs With Randomly Distributed Users

IEEE Wireless Communications Letters
In this letter, a novel class of sparse codebooks is proposed for sparse code multiple access (SCMA) aided non-terrestrial networks (NTN) with randomly distributed users characterized by Rician fading channels.
Tianyang Hu, Qu Luo, Lixia Xiao, Jiaxi Zhou, Pei Xiao, Tao Jiang   +5 more
semanticscholar   +1 more source

Novel Sparse Codebook Design for MIMO-SCMA

IEEE Transactions on Vehicular Technology
The combination of multiple-input multiple-output (MIMO) and sparse code multiple access (SCMA), referred to as MIMO-SCMA, can be leveraged to achieve high spectrum efficiency and provide massive connectivity for future machine-type communication ...
Tuofeng Lei, Qu Luo, Shuyan Ni, Shimiao Chen, Lisu Yu, Pei Xiao   +5 more
semanticscholar   +1 more source

Computation Rate Maximization for SCMA-Aided Edge Computing in IoT Networks: A Multi-Agent Reinforcement Learning Approach

IEEE Transactions on Wireless Communications
Integrating sparse code multiple access (SCMA) and mobile edge computing (MEC) into the Internet of Things (IoT) networks can enable efficient connectivity and timely computation for resource-limited IoT users.
Pengtao Liu, Kang An, Jing Lei, Yifu Sun, Wei Liu, S. Chatzinotas   +5 more
semanticscholar   +1 more source

Low-Complexity MIMO-SCMA Detection for LEO Satellite Communications

IEEE Transactions on Vehicular Technology
In order to unlock the full advantages of low earth orbit (LEO) satellite communications, non-orthogonal multiple access (NOMA) has been introduced for supporting massive access in the uplink.
Yusha Liu, Chen Zhang, Jie Hu, Jian Chen, Kun Yang   +4 more
semanticscholar   +1 more source

Comparison of Codebooks for Non-Orthogonal Multiple Access SCMA

2025 Systems of Signals Generating and Processing in the Field of on Board Communications
The ever-increasing demand for high-capacity and low-latency communications in next-generation wireless networks has driven the evolution of advanced multiple access techniques.
Julia Timoschuk, T. B. Rejeb
semanticscholar   +1 more source

SCMA with new codebook design

2019 9th International Conference on Advances in Computing and Communication (ICACC), 2019
Sparse code multiple access (SCMA) is one of the promising non-orthogonal multiple access which utilizes iterative message passing algorithm (MPA) as decoding technique. This paper discusses about, basics of SCMA, mapping of information to codebooks, codebook structure and functioning of receiver. In SCMA, each user has their own codebook.
J Prabhavathi bhai, K Rama Naidu
openaire   +1 more source

Radio Resource Allocation in SCMA-Based D2D Underlay Systems

2025 IEEE International Symposium on Future Telecommunication Technologies (SOFTT)
This paper investigates a hybrid radio resource allocation strategy for 5G networks by combining Orthogonal Frequency Division Multiple Access (OFDMA) for Cellular Users (CU) and Sparse Code Multiple Access (SCMA) for device-to-device (D2D) pairs ...
Fauzan Luthfi Pinem, Bilqis Maisa Nurhakim, Javi Akbar Prabowo, V. Prabowo, N. Adriansyah   +4 more
semanticscholar   +1 more source

Spherical Codes for SCMA Codebook

2016 IEEE 83rd Vehicular Technology Conference (VTC Spring), 2016
In this paper, we investigate the application of spherical codes in a sparse code multiple access (SCMA) system. We use spherical codes to build multidimensional mother constellations for SCMA codebooks, to lower peak to average power ratio (PAPR) as well as to improve the overall spectrum efficiency.
Jinchen Bao, Zheng Ma, Mahamuda Alhaji Mahamadu, Zhongliang Zhu, Dageng Chen   +4 more
openaire   +1 more source