Results 11 to 20 of about 12,216,998 (317)

Hierarchical Codebook Design for Near-Field MmWave MIMO Communications Systems [PDF]

IEEE Wireless Communications Letters, 2022
Communications system with analog or hybrid analog/digital architectures usually relies on a pre-defined codebook to perform beamforming. With the increase in the size of the antenna array, the characteristics of the spherical wavefront in the near-field
Jiawei Chen, Feifei Gao, Mengnan Jian, Wanmai Yuan   +3 more
openalex   +3 more sources

On the Initialization of Swarm Intelligence Algorithms for Vector Quantization Codebook Design [PDF]

Sensors
Vector 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, Felipe B. S. Ferreira, Rodrigo Spencer, Arthur Nascimento, Francisco Madeiro   +4 more
doaj   +2 more sources

Quantum Speedup of the Dispersion and Codebook Design Problems [PDF]

IEEE Transactions on Quantum Engineering
In this article, we propose new formulations of max-sum and max-min dispersion problems that enable solutions via the Grover adaptive search (GAS) quantum algorithm, offering quadratic speedup.
Kein Yukiyoshi, Taku Mikuriya, Hyeon Seok Rou, Giuseppe Thadeu Freitas de Abreu, Naoki Ishikawa   +4 more
openalex   +2 more sources

A Superimposed Codebook Design for Downlink Sparse Code Multiple Access Visible Light Communication System [PDF]

Photonics
The 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, Zixiong Wang, Jinlong Yu, Yang Jiang   +3 more
doaj   +2 more sources

Environment-Aware Codebook Design for RIS-Assisted MU-MISO Communications: Implementation and Performance Analysis [PDF]

IEEE Transactions on Communications
Reconfigurable intelligent surface (RIS) provides a new electromagnetic response control solution, which can proactively reshape the characteristics of wireless channel environments. In RIS-assisted communication systems, the acquisition of channel state
Zhiheng Yu, Jiancheng An, Ertuğrul Başar, Lu Gan, Chau Yuen   +4 more
openalex   +3 more sources

Passive Reflection Codebook Design for IRS-Integrated Access Point [PDF]

IEEE Transactions on Wireless Communications, 2023
Intelligent reflecting surface (IRS) has emerged as a promising technique to control wireless propagation wireless environment for improving the communication performance cost-effectively and extending the wireless signal coverage of access point (AP ...
Yuwei Huang, Lipeng Zhu, Rui Zhang
openalex   +3 more sources

RIS-Measurements for Codebook Design

2024 20th International Conference on Wireless and Mobile Computing, Networking and Communications (WiMob)
Reconfigurable Intelligent Surfaces (RIS) have gained significant attention for some time. Thanks to the possibility of individual steering of each reflecting element of the boards, they are envisaged to impact the propagation environment significantly. In this work, we concentrate on the practical verification of this concept.
Hatka, Paweł, Garczyk, Marcel, Płaczkiewicz, Paweł, Brząkała, Dawid, Cichoń, Krzysztof, Kliks, Adrian   +5 more
openaire   +3 more sources

Low-Complexity Codebook Design for SCMA-Based Visible Light Communication [PDF]

IEEE Open Journal of the Communications Society, 2022
Sparse code multiple access (SCMA), as a code-domain non-orthogonal multiple access (NOMA) scheme, has received considerable research attention for enabling massive connectivity in future wireless communication systems.
Saumya Chaturvedi, Dil Nashin Anwar, Vivek Ashok Bohara, Anand Srivastava, Zilong Liu   +4 more
doaj   +2 more sources

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, Wenping Ge, Pengju Zhang, Yongxing Zhang   +3 more
doaj   +2 more sources

Performance Analysis and Codebook Design for mmWave Beamforming System with Beam Squint [PDF]

IEEE Wireless Communications Letters, 2021
Beamforming technology is widely used in millimeter wave systems to combat path losses, and beamformers are usually selected from a predefined codebook.
Hongkang Yu, Pengxin Guan, Yiru Wang, Yuping Zhao   +3 more
openalex   +3 more sources