Results 31 to 40 of about 12,216,998 (317)
Extremely Large-Scale Array Systems: Near-Field Codebook Design and Performance Analysis [PDF]
IEEE Transactions on Communications, 2023 Extremely Large-scale Array (ELAA) promises to deliver ultra-high data rates with increased antenna elements. However, increasing antenna elements leads to a wider realm of near-field, which challenges the traditional design of codebooks.
Feng Zheng +5 more
semanticscholar +1 more source
ML Codebook Design for Initial Access and CSI Type-II Feedback in Sub-6GHz 5G NR [PDF]
arXiv.org, 2023 Beam codebooks are a recent feature to enable high dimension multiple-input multiple-output in 5G. Codebooks comprised of customizable beamforming weights can be used to transmit reference signals and aid the channel state information (CSI) acquisition ...
Ryan M. Dreifuerst, R. Heath
semanticscholar +1 more source
Design of Power-Imbalanced SCMA Codebook [PDF]
IEEE Transactions on Vehicular Technology, 2022 Sparse code multiple access (SCMA) is a promising multiuser communication technique for the enabling of future massive machine-type networks. Unlike existing codebook design schemes assuming uniform power allocation, we present a novel class of SCMA codebooks which display power imbalance among different users for downlink transmission.
Xudong Li +5 more
openaire +3 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 +1 more source
SCMA High-Dimensional Codebook Design Based on VBR-GAM
天地一体化信息网络, 2023 At the physical layer, sparse code multiple access (SCMA) technology is used to solve the problem of massive user access.In the current research on SCMA, in addition to the research on SCMA multi-user detection technology, more attention will be paid to ...
Xu DENG, Ke CHU, Lidong ZHU
doaj +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
Variable dimension VQ encoding and codebook design [PDF]
IEEE Transactions on Communications, 1997 A variable dimension vector quantizer (VDVQ) has codewords of unequal dimensions. Here, a trellis-based sequential optimal VDVQ encoding algorithm is proposed. Also, a VDVQ codebook design algorithm based on splitting a node with equal or reduced dimensions is proposed that does not require any codebook parameter to be prespecified unlike known schemes.
Makur, Anamitra, Subbalakshmi, KP
openaire +2 more sources
A Novel Multitask Learning Empowered Codebook Design for Downlink SCMA Networks [PDF]
IEEE Wireless Communications Letters, 2022 Sparse code multiple access (SCMA) is a promising code-domain non-orthogonal multiple access (NOMA) scheme for the enabling of massive machine-type communication.
Qu Luo +4 more
semanticscholar +1 more source
IEEE Transactions on Vehicular Technology, 2023 High altitude platform station (HAPS) communications have made a tremendous impact on recent research into sixth-generation (6G) and beyond wireless networks.
Irem Cumali +3 more
semanticscholar +1 more source
Downlink SCMA Codebook Design With Low Error Rate by Maximizing Minimum Euclidean Distance of Superimposed Codewords [PDF]
IEEE Transactions on Vehicular Technology, 2021 Sparse code multiple access (SCMA), as a codebook-based non-orthogonal multiple access (NOMA) technique, has received research attention in recent years. The codebook design problem for SCMA has also been studied to some extent since codebook choices are
Chinwei Huang +3 more
semanticscholar +1 more source