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Codebook Design for Extremely Large-Scale MIMO Systems: Near-Field and Far-Field
IEEE Transactions on CommunicationsExtremely large-scale multiple-input multiple-output (XL-MIMO) communication systems introduce a new communication paradigm called near-field communications, which identifies users’ location within the near-field (Fresnel’s region).
Xiangyu Zhang +5 more
semanticscholar +1 more source
Environment Knowledge-Aided Massive MIMO Feedback Codebook Enhancement Using Artificial Intelligence
IEEE Transactions on Communications, 2022The autoencoder empowered by artificial intelligence has shown considerable potential in solving channel state information (CSI) feedback problems in frequency-division duplexing systems.
Jiajia Guo +3 more
semanticscholar +1 more source
Multi-Agent Deep Reinforcement Learning for Beam Codebook Design in RIS-Aided Systems
IEEE Transactions on Wireless CommunicationsReconfigurable intelligent surfaces (RISs) play a vital role in future wireless systems with the capability of enhancing propagation environments by intelligently reflecting the signals toward the target receivers.
A. Abdallah +3 more
semanticscholar +1 more source
Hierarchical Codebook-Based Multiuser Beam Training for Millimeter Wave Massive MIMO
IEEE Transactions on Wireless Communications, 2020In this article, multiuser beam training based on hierarchical codebook for millimeter wave massive multi-input multi-output is investigated, where the base station (BS) simultaneously performs beam training with multiple user equipments (UEs).
Chenhao Qi +3 more
semanticscholar +1 more source
Ring-type Codebook Design for Reconfigurable Intelligent Surface Near-field Beamforming
IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, 2022Reconfigurable intelligent surface (RIS) is a research hotspot for the fifth generation evolution (5GE) and the sixth generation (6G) wireless communication systems to extend high-frequency coverage.
Fang Wang +6 more
semanticscholar +1 more source
2023
The Paris Agreement serves as a global framework with the aim of averting perilous climate change. Its primary objectives are to limit global warming to a level significantly below 2°C and to strive for even greater efforts to keep the increase in temperature below 1.5°C (UNFCCC 2015).
Schiller, Christof, Hellmann, Thorsten
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The Paris Agreement serves as a global framework with the aim of averting perilous climate change. Its primary objectives are to limit global warming to a level significantly below 2°C and to strive for even greater efforts to keep the increase in temperature below 1.5°C (UNFCCC 2015).
Schiller, Christof, Hellmann, Thorsten
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A Low-Complexity Codebook Optimization Scheme for Sparse Code Multiple Access
IEEE Transactions on Communications, 2022Sparse code multiple access (SCMA) is a promising non-orthogonal multiple access technique to support massive connectivity for future wireless Internet of Things (IoT) networks. As the main feature of SCMA, modulation and spread spectrum is embedded into
Chengxin Jiang +3 more
semanticscholar +1 more source
Machine Learning Codebook Design for Initial Access and CSI Type-II Feedback in Sub-6-GHz 5G NR
IEEE Transactions on Wireless CommunicationsBeam 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, Robert W. Heath
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A Low-Complexity Codebook Design Scheme for SCMA Systems Over an AWGN Channel
IEEE Transactions on Vehicular Technology, 2022As a promising wireless access technique, sparse code multiple access (SCMA) directly maps the input bits to the transmitted multidimensional codewords according to the SCMA codebook. In general, SCMA codebook optimization and detector simplification are
Yu Zheng +4 more
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Improved Codebook Edge Detection
Graphical Models and Image Processing, 1995Abstract A technique for detecting edges directly from a vector-quantized image representation, called codebook edge detection was proposed by Mclean (CVGIP: Graphical Models Image Process. 55, 1993, 48-57). With this method, the edges can be detected by a simple table lookup, a so-called "edge codebook." In this paper, we propose an improved method ...
Zhou, Jie, Peng, Jiaxiong, Ding, Mingyue
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