Results 11 to 20 of about 33,278 (292)
Lexicographic Codebook Design for OFDM With Index Modulation [PDF]
IEEE Transactions on Wireless Communications, 2018 In this paper, we propose a novel codebook design scheme for orthogonal frequency-division multiplexing with index modulation (OFDM-IM) to improve system performance. The optimization process can be implemented efficiently by the lexicographic ordering principle.
Shuping Dang +2 more
core +7 more sources
Design Low Complexity SCMA Codebook Using Arnold’s Cat Map
Journal of Telecommunications and Information Technology, 2022 In 5G wireless communications, sparse code multiple access (SCMA) – a multi-dimensional codebook based on a specific category of the non-orthogonal multiple access (NOMA) technique - enables many users to share non-orthogonal resource components with a ...
Sura S. Mohamed, Hikmat N. Abdullah
doaj +2 more sources
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
doaj +2 more sources
Investigating High Performance Implementations of Sparse Code Multiple Access (SCMA) Codebook Design
JISR on Computing, 2022 - The number of mobile devices, IoT devices, and their applications is increasing day by day in recent years and further going to increase in coming years.
Halar Mustafa
doaj +2 more sources
PhotonicsThe capacity performance of visible light communication (VLC) systems can be improved by using sparse code multiple access (SCMA). Since SCMA is a codebook-based multiple access scheme, the design of the codebook is crucial.
Jingxuan Dong +3 more
doaj +2 more sources
An algorithm for binary codebook design based on the average bitmap replacement error (ABPRE)
مجلة بغداد للعلوم, 2011 In this paper, an algorithm for binary codebook design has been used in vector quantization technique, which is used to improve the acceptability of the absolute moment block truncation coding (AMBTC) method.
Baghdad Science Journal
doaj +3 more sources
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
Mahmoud Taherzadeh +3 more
openaire +2 more sources
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
doaj +1 more source
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 ...
Kuntal Deka +3 more
openaire +2 more sources
SCMA CODEBOOK DESIGN BASED ON GRADIENT ASCENT ALGORITHM [PDF]
Proceedings on Engineering Sciences, 2022 Sparse Code Multiple Access (SCMA) is a non-orthogonal multiple access scheme, which improves spectrum efficiency. SCMA codebooks determine the bit error rate (BER) performance.
Islam Kanatbekuli +4 more
doaj +1 more source