Results 1 to 10 of about 85,361 (168)
SCMA Codebook Design Based on Divided Extended Mother Codebook [PDF]
IEEE Access, 2021 Sparse code multiple access (SCMA) is one of the competitive non-orthogonal multiple access (NOMA) techniques for the next generation communication systems.
Zhaoyang Hou +3 more
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2014 IEEE 80th Vehicular Technology Conference (VTC2014-Fall), 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. Low density signature (LDS) is a version of CDMA with low density spreading sequences allowing us to take advantage of a near optimal message
Taherzadeh, Mahmoud +3 more
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Accelerating Families of Fuzzy K-Means Algorithms for Vector Quantization Codebook Design [PDF]
Sensors, 2016 The performance of signal processing systems based on vector quantization depends on codebook design. In the image compression scenario, the quality of the reconstructed images depends on the codebooks used.
Edson Mata +4 more
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On the Initialization of Swarm Intelligence Algorithms for Vector Quantization Codebook Design [PDF]
SensorsVector Quantization (VQ) is a technique with a wide range of applications. For example, it can be used for image compression. The codebook design for VQ has great significance in the quality of the quantized signals and can benefit from the use of swarm ...
Verusca Severo +4 more
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Hierarchical Codebook Design for Massive MIMO
EAI Endorsed Transactions on Scalable Information Systems, 2015 The Research of Massive MIMO is an emerging area, since the more antennas the transmitters or receivers equipped with, the higher spectral efficiency and link reliability the system can provide. Due to the limited feedback channel, precoding and codebook
Xin Su +3 more
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Codebook Design for PD-SCMA NOMA Systems
IEEE Access, 2023 The hybrid power domain sparse code non-orthogonal multiple access (PD-SCMA) scheme multiplexes multiple users on a single resource element (RE) both in power and code domains, thus achieving a superior spectral efficiency.
Simon Chege, Tom Walingo, Foued Derraz
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An Efficient Codebook Design for Uplink SCMA
IEEE Access, 2020 Sparse code multiple access (SCMA) is one of the most intensively investigated non-orthogonal multiple access (NOMA) techniques for the fifth generation communication (5G) system. In this paper, a new multi-stage optimization approach for codebook design
Mengyao Gao +3 more
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Design of SCMA Codebooks using Differential Evolution [PDF]
2020 IEEE International Conference on Communications Workshops (ICC Workshops), 2020 Accepted for presentation in IEEE ICC'20 Workshop ...
Deka, Kuntal +3 more
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Interleaving based SCMA Codebook Design Using Arnold’s Cat Chaotic Map
Iraqi Journal of Information & Communication Technology, 2023 Non-orthogonal multiple access (NOMA) technology is a significant topic of the present 5G investigation. A possible NOMA approach is Sparse Code Multiple Access (SCMA), increasing next-generation communication's ability to handle multiple users. In SCMA,
Sura S. Mohamed, Hikmat N. Abdullah
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SCMA Codebook Design Based on a 16 Star-QAM with MED Maximization [PDF]
ITM Web of Conferences, 2022 The SCMA codebook design is based on star-QAM signalling constellations with operating several segmentations to generate the different user’s codebook while considering the MED maximization as the criterion design. In addition, we constructed the mapping
Meriem Afilal +3 more
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