Results 21 to 30 of about 5,087 (193)
Joint User Clustering and Beamforming in Non-Orthogonal Multiple Access Networks
IEEE Access, 2020 The demand for higher data rate in wireless networks continues to grow, however the wireless spectrum cannot meet ever-increasing demands. Non-orthogonal Multiple Access (NOMA) technology is attracting attentions to overcome the lack of resource spectrum
Ha-Ryung Kim, Jiasi Chen, Jongwon Yoon
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Achievable Rate Region under Linear Beamforming for Dual-Hop Multiple-Access Relay Network
Entropy, 2018 Consider a network consisting of two independent single-antenna sources, a single-antenna destination and a helping multiple-antenna relay. This network is called a dual-hop multiple access relay network (MARN).
Guiguo Feng, Wangmei Guo, Binyue Liu
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Implementasi Struktur Meander Line untuk Mereduksi Ukuran Butler Matrix 2 × 2
Jurnal Nasional Teknik Elektro dan Teknologi Informasi, 2021 Butler matrix adalah beamforming network yang umum digunakan pada antena multibeam karena memiliki struktur yang sederhana dan efisiensi yang tinggi. Namun, Butler matrix memiliki dimensi yang relatif besar.
Zulfi, Achmad Munir
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IEEE Access, 2023 In this article, a multiport beamforming system based on the reconfigurable waveguide phased antenna array is presented, which is fed by the microstrip single-layer multiport feeding network.
Yifang Wei +2 more
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Optimal Hybrid Beamforming Design for Millimeter-Wave Massive Multi-User MIMO Relay Systems
IEEE Access, 2019 As a promising technology in the next generation mobile network, millimeter-wave (mmWave) communication can mitigate the spectrum crunch of improving the network capacity by exploiting the large underutilized spectrum bands of the mmWave frequencies. The
Yang Zhang +4 more
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Sensors, 2017 This paper investigates how to efficiently charge sensor nodes in a wireless rechargeable sensor network (WRSN) with radio frequency (RF) chargers to make the network sustainable. An RF charger is assumed to be equipped with a uniform circular array (UCA)
Ke-Han Yao +3 more
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Multi-Beam 5G Antenna With Miniaturized Butler Matrix Using Stacked LTCC
IEEE Access, 2023 In this work, we present a compact four-direction beamforming 5G antenna based on a stacked $4\times4$ Butler matrix and a microstrip patch array antenna.
Jaewoong Jung +2 more
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Passive Beamforming Design for Double RIS-muMIMO System: A Machine Learning Perspective
IEEE AccessMultiple-input multiple-output (MIMO) and reconfigurable intelligent surfaces (RIS) enable network system designers to create intelligent, energy-efficient network systems.
M. Rezwanul Mahmood +2 more
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Null‐space beamforming strategy for secrecy rate balancing of two‐way MIMO relay networks
IET Communications, 2023 Here, the issue of physical layer security in a two‐way multi‐antenna relay network) is studied. In such a network, two multi‐antenna transceivers attempt to exchange their secret messages via a multi‐antenna relay node in the presence of an eavesdropper.
Samad Fazeli, Soroush Akhlaghi
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A Review of Multibeam Phased Array Antennas as LEO Satellite Constellation Ground Station
IEEE Access, 2021 Small satellites in low Earth orbit (LEO) are typically organized as a satellite constellation. The satellite number of a LEO satellite constellation would be several hundred or even tens of thousands to realize a fully global coverage.
Guolong He +3 more
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