Novel Gaussian Integer Sparse Code Multiple Access [PDF]
, 2016 Sparse code multiple access (SCMA) is proposed for 5th generation mobile networks. Because SCMA has good spectrum efficiency. Each user is assigned a SCMA codebook, which is made of codeword.
Chang, Feng-cheng
core
Enabling High Order SCMA Systems in Downlink Scenarios With a Serial Coding Scheme
IEEE Access, 2018 In the future fifth generation communication systems, sparse code multiple access (SCMA) shows strong competitiveness as a novel non-orthogonal multiple access (NOMA) technique. Attributing to multi-dimensional codebooks, the SCMA can obtain shaping gain
Yuxi Han +3 more
doaj +1 more source
Uplink Grant-Free Sparse Code Multiple Access Schemes for mMTC Applications [PDF]
, 2023 Sparse Code Multiple Access (SCMA) is a non-orthogonal multiple access (NOMA) technology that supports large-scale connections, thereby improving the spectrum efficiency.
Tsai, Chang-You
core
Grant-Free Rateless SCMA for Cellular Internet of Things Networks
IEEE Access, 2019 For supporting the massive connectivities and better adapting the high dynamical channel states of the cellular Internet of things networks, in this paper we proposed a new grant-free rateless sparse code multiple access (RSCMA) protocol. In the proposed
Zhipeng Pan +4 more
doaj +1 more source
Phase Noise Resilient Codebook Design for Sparse Code Multiple Access [PDF]
Sparse code multiple access (SCMA) is a promising technique for future machine type communication systems due to its superior spectral efficiency and capability for supporting massive connectivity. This paper proposes a novel class of sparse codebooks to
Luo, Shan +5 more
core +1 more source
Sparse Code Multiple Access With Time Spreading and Repetitive Transmissions [PDF]
Ulgen, Oguz/0000-0003-4923-7191For the next-generation communication systems, to improve spectral efficiency and increase the data rate, new multiple access techniques have been investigated.
Anpalagan, Alagan +5 more
core +1 more source
Sparse code multiple access on the generalized frequency division multiplexing
EURASIP Journal on Wireless Communications and Networking, 2020 Recent advances in the communication systems culminated in a new class of multiple access schemes, named non-orthogonal multiple access (NOMA), where the main goal is to increase the spectrum efficiency by overlapping data from different users in a ...
Guilherme P. Aquino, Luciano L. Mendes
doaj +1 more source
Optimized SCMA Codebook Design by QAM Constellation Segmentation With Maximized MED
IEEE Access, 2018 An optimized design of a sparse code multiple access (SCMA) codebook for uplink wireless communications is presented by dividing an optimized 16-point round quadrature amplitude modulation (QAM) into several subsets.
Shunlan Liu +3 more
doaj +1 more source
Biological Resource Allocation Algorithms for Heterogeneous Uplink PD-SCMA NOMA Networks
IEEE Access, 2020 Due to their ability to multiplex users on a resource element (RE), Non-orthogonal multiple access (NOMA) techniques have gained popularity in 5G network implementation.
Thabelang Sefako, Tom Walingo
doaj +1 more source
Reinforcement Learning Based Designs of Sparse Code Multiple Access Codebooks [PDF]
, 2020 Sparse Code Multiple Access (SCMA) has been introduced in previous literature with characteristics that makes it a promising candidate for the next generation of mobile technology. In this thesis a novel algorithm to solve the complex problem of codebook
Daniel Sagastume Gonzalez, Carlos
core