Results 41 to 50 of about 85,381 (188)
SCMA with Low Complexity Symmetric Codebook Design for Visible Light Communication
, 2017 Sparse code multiple access (SCMA) is attracting significant research interests currently, which is considered as a promising multiple access technique for 5G systems.
Gao, Qian +3 more
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A Novel Scheme for the Construction of the SCMA Codebook
IEEE Access, 2022 As a code-domain non-orthogonal multiple access technique, sparse code multiple access (SCMA) is considered as a promising technique for future wireless Internet of Things (IoT) networks. The minimum Euclidean distance (MED) and minimum product distance (
Tuofeng Lei +4 more
doaj +1 more source
Constellation Partitioning-Based Scma Codebook Design
, 2023 Abstract A new codebook design is proposed for sparse code multiple access (SCMA) uplink transmissions using constellation partitioning to increase the minimum Euclidean distance. The simulation results show that the proposed codebook design outperforms existing SCMA Codebook in terms of error rate performance. More so, the codebook is suitable
Randal Press +2 more
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Bit Allocation Law for Multi-Antenna Channel Feedback Quantization: Single-User Case
, 2010 This paper studies the design and optimization of a limited feedback single-user system with multiple-antenna transmitter and single-antenna receiver. The design problem is cast in form of the minimizing the average transmission power at the base station
Khoshnevis, Behrouz, Yu, Wei
core +3 more sources
Distributed Channel Synthesis [PDF]
, 2013 Two familiar notions of correlation are rediscovered as the extreme operating points for distributed synthesis of a discrete memoryless channel, in which a stochastic channel output is generated based on a compressed description of the channel input ...
Cuff, Paul
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Space Division Multiple Access with a Sum Feedback Rate Constraint [PDF]
, 2006 On a multi-antenna broadcast channel, simultaneous transmission to multiple users by joint beamforming and scheduling is capable of achieving high throughput, which grows double logarithmically with the number of users.
Andrews, Jeffrey G. +2 more
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Fast codebook design of vector quantisation
Electronics Letters, 2012 To reduce the computational overhead of the codebook design of vector quantisation, a fast codebook design method is proposed. In this method, the energy distribution of vectors is improved by rearranging the elements of vectors based on the information of the energy distribution at each dimension of the initial codebook.
S.X. Chen, F.W. Li
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Precoder Design for Physical Layer Multicasting [PDF]
, 2012 This paper studies the instantaneous rate maximization and the weighted sum delay minimization problems over a K-user multicast channel, where multiple antennas are available at the transmitter as well as at all the receivers.
Prasad, Narayan +2 more
core +1 more source
IEEE Access, 2018 Sparse code multiple access (SCMA) is a promising candidate air interface of next-generation mobile networks. In this paper, we focus on a downlink SCMA system where a transmitter sends confidential messages to multiple users in the presence of external ...
Ke Lai +5 more
doaj +1 more source
A mean-removed variation of weighted universal vector quantization for image coding [PDF]
, 1993 Weighted universal vector quantization uses traditional codeword design techniques to design locally optimal multi-codebook systems. Application of this technique to a sequence of medical images produces a 10.3 dB improvement over standard full search ...
Andrews, Barry D. +3 more
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