Results 161 to 170 of about 1,654 (206)

An Introduction to Neural Networks in SCMA

Wireless Personal Communications, 2021
Sparse Code Multiple Access (SCMA) has proved to be a fascinating research in order to curtail the complications faced by the wireless communication networks. SCMA being a Non-Orthogonal Multiple Access technique evinces to be an outstanding candidate, to cater the complications faced by 5G communication networks to improve the bit error rate and ...
Madhura Kanzarkar, Mulpuri Santhi Sri Rukmini, Rajeshree D. Raut   +2 more
openaire   +1 more source

Enabling SCMA long codewords with a parallel SCMA coding scheme

2015 International Conference on Wireless Communications & Signal Processing (WCSP), 2015
Fifth generation (5G) wireless networks require massive connectivity with a large number of devices and ask for non-orthogonal multiple access which has been proposed as a paradigm shift of physical layer technologies. Among all the existing non-orthogonal technologies where the number of users can be larger than the spreading factor, recently proposed
Yuxi Han, Sihai Zhang, Wuyang Zhou, Qing Ling   +3 more
openaire   +1 more source

On Gaussian Approximation Algorithms for SCMA

2019 16th International Symposium on Wireless Communication Systems (ISWCS), 2019
Sparse code multiple access (SCMA) is a promising technique in future fifth generation (5G) wireless networks. Since message passing algorithm (MPA) as a widely-used SCMA detection algorithm has exponential complexity with codebook size, researching lower complexity algorithms is of significant importance.
Fu, Xiaotian, Pischella, Mylène, Le Ruyet, Didier   +2 more
openaire   +2 more sources

SCMA Decoding via Deep Learning

IEEE Wireless Communications Letters, 2021
Sparse code multiple access (SCMA) has become a highly competitive technology for future cellular systems. For the receiver of the SCMA system, besides the traditional maximum likelihood and message passing algorithm solutions, a deep neural network (DNN) method that causes whirlwinds in image recognition can reduce the computational complexity of the ...
Chia-Po Wei, Han Yang, Chih-Peng Li, Yen-Ming Chen   +3 more
openaire   +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 0001, Mahamuda Alhaji, Zhongliang Zhu, Dageng Chen   +4 more
openaire   +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 Bélanger, Yvon Savaria, François R. Boyer   +3 more
openaire   +2 more sources

Uplink Spatial Modulation SCMA System

IEEE Communications Letters, 2019
Multiple-input multiple-output (MIMO) and sparse code multiple access (SCMA) are two effective techniques supporting high spectral efficiency and massive connectivity, respectively. Although the combination of these two techniques, namely MIMO-SCMA, can further improve the spectral efficiency, it deteriorates the error performance and greatly increases
Zhipeng Pan, Junshan Luo, Jing Lei
exaly   +2 more sources

Optimal receiver design for SCMA system

2017 IEEE 28th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC), 2017
Sparse code multiple access (SCMA) is a promising non-orthogonal multiple access scheme for 5G systems. In this paper, based on the sphere decoding (SD), we design an optimal receiver for SCMA, which provides much lower complexity than the maximum likelihood (ML) detection without sacrifice of the optimal performance.
Guangjin Chen, Jincheng Dai, Kai Niu 0001, Chao Dong 0002   +3 more
openaire   +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

A Wasserstein GAN Autoencoder for SCMA Networks

IEEE Wireless Communications Letters, 2022
In the view of the exponential growth of mobile applications, the Sparse Code Multiple Access (SCMA) is one promising code-domain Non-Orthogonal Multiple Access (NOMA) technique. The challenge in the adoption of SCMA in practical networks is twofold: designing optimal codebooks at the transmitter and decoding the data at the receiver.
Luciano Miuccio, Daniela Panno, Salvatore Riolo   +2 more
openaire   +2 more sources