Results 41 to 50 of about 518,836 (208)
1.4 GHz Low-Cost PIN Diode Phase Shifter for
IEEE Access, 2019 A 1.4 GHz 4-bit positive intrinsic negative (PIN) diode phase shifter with compact reflective loads for an L-band soil moisture measuring radiometer phased array antenna has been successfully designed.
Kim Tuyen Trinh +3 more
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The features of digital switched-line phase shifter computation
Технологія та конструювання в електронній апаратурі, 2007 Problems arising in the design of through‑type discrete microwave phase shifters with switchable channels are considered. These problems are related to the choice of the type of switching elements and their connection scheme, to the calculation of beam ...
V. I. Oborzhytskyy, V. D. Gontar
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Performance Comparison of Hybrid Switch, Phase Shifter and Lens Network over Hybrid Beamforming in Millimeter Wave Massive MIMO [PDF]
Iranian Journal of Electrical and Electronic EngineeringDue to cost and energy concerns with digital beamformers, much of the beamforming is done by hybrid beamformers in mm-wave (mm) massive multiple input multiple output (MIMO). Various works in hybrid beamforming structures considered either phase shifters,
Tadele A Abose +3 more
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IEEE Access, 2019 The conflict between heavy training overhead and large beamforming gain is a bottleneck to deploy millimeter-wave (mmWave) communications for the next-generation wireless networks.
Renmin Zhang +3 more
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A digital phase shifter with 7.5° resolution
Journal of Magnetic Resonance (1969), 1989 Abstract A high-resolution, digital, radiofrequency phase shifter which provides phase resolution of 7.5° in 48 steps under computer control is described. This phase shifter is constructed as an addition to an existing NMR instrument and is operated in parallel with the standard 90° resolution phase shifter. The addition requires no external signals,
Department of Radiology, Box J-374, J Hillis Miller Health Center, University of Florida, Gainesville, Florida 32610, USA ( host institution ) +4 more
openaire +2 more sources
Hybrid Multi-User Equalizer for Massive MIMO Millimeter-Wave Dynamic Subconnected Architecture
IEEE Access, 2019 This paper proposes a hybrid multi-user equalizer for the uplink of broadband millimeter-wave massive multiple input/multiple output (MIMO) systems with dynamic subarray antennas.
Roberto Magueta +4 more
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Interference mitigation using random antenna selection in millimeter wave beamforming system
EURASIP Journal on Wireless Communications and Networking, 2017 In multi-user beamforming systems, the inter-user interference are controlled by spatial filtering. Since the implementation of digital beamforming is difficult due to high hardware cost of large array system, the analog beamforming system with one phase
Woochang Lim, Girim Kwon, Hyuncheol Park
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Hybrid precoding and power allocation for mmWave NOMA systems based on time delay line arrays
Tongxin xuebao, 2022 Objectives: The antenna structure in conventional millimeter-wave (mmWave) nonorthogonal multiple access(NOMA)systems is based on a high-resolution and high-energy phase shifter modulation network,and how to reduce the system energy consumption while ...
Gangcan SUN +3 more
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Physical Review Accelerators and BeamsTransverse feedback systems are essential for stable operation of all hadron accelerators with high intensity beams. An important component of such a system is a powerful digital signal processing unit.
Gerd Kotzian +4 more
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Digitally Excited Reconfigurable Linear Antenna Array Using Swarm Optimization Algorithms
Iranian Journal of Electrical and Electronic Engineering, 2020 This paper describes the synthesis of digitally excited pencil/flat top dual beams simultaneously in a linear antenna array constructed of isotropic elements. The objective is to generate a pencil/flat top beam pair using the excitations generated by the
D. Jamunaa, G. K. Mahanti, F. N. Hasoon
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