Results 21 to 30 of about 35,290,266 (224)
Low Complexity and Robust Codebook-Based Analog Beamforming for Millimeter Wave MIMO Systems
IEEE Access, 2017 Millimeter-wave (mm-Wave) MIMO systems have been proposed to achieve higher spectral efficiency via the hybrid beamforming structure, which consists of analog beamforming and digital beamforming.
Yong Niu +5 more
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Transceiver Design in Millimeter Wave Full-Duplex Multi-User Massive MIMO Communication Systems
IEEE Access, 2021 We consider hybrid transmit precoding and receive combining in a millimeter wave (mmWave) multiple-input multiple-output (MIMO) multi-user cellular system, where a full-duplex (FD) base station (BS) serves multiple half-duplex (HD) uplink and downlink ...
Mostafa Darabi +2 more
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Synthesis of efficient digital beamformers [PDF]
The Journal of the Acoustical Society of America, 1981 Digital interpolation beamforming [R. Pridham and R. Mucci, J. Acoust. Soc. Am. 63, 425–433 (1978)] permits a reduction in A/D conversion rate, telemetry bandwidth, and memory throughput, relative to nearest-sample-selection beamforming, at the expense of an increase in arithmetic operations.
Robert A. Gabel, Richard R. Kurth
openaire +1 more source
Adaptive beamforming for large arrays in satellite communications systems with dispersed coverage [PDF]
, 2011 Conventional multibeam satellite communications systems ensure coverage of wide areas through multiple fixed beams where all users inside a beam share the same bandwidth. We consider a new and more flexible system where each user is assigned his own beam,
Larue de Tournemine, Cécile +5 more
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Alternating minimum mean square error hybrid beamforming algorithm in mmWave MIMO system
Dianxin kexue, 2017 The two-stage hybrid beamforming architecture can solve the problem of limited number of RF chains effectively.However,it is still difficult to design a hybrid beamforming algorithm with better performance.In order to achieve higher spectral efficiency ...
Min SHEN, Hao XU, Yun HE, Pengguang ZHOU
doaj +2 more sources
IEEE Access, 2019 Medium-scale or large-scale receive antenna array with digital beamforming can be employed at receiver to make a significant interference reduction but leads to expensive cost and high complexity of the RF-chain circuit.
Linlin Sun +7 more
doaj +1 more source
Adaptive Beamforming With Software-Defined-Radio Arrays
IEEE Access, 2022 Digital beamforming is the holy grail of antenna array technologies, however implementing digital beamforming into practical antenna arrays has been slow due to hardware complexity and cost.
Daniel Christopher Gaydos +2 more
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Wideband analog and digital beamforming [PDF]
2009 9th International Conference on Telecommunication in Modern Satellite, Cable, and Broadcasting Services, 2009 High quality beamforming is necessary for the integrity of phased arrays and accuracy of monopulse direction finding systems. Traditionally, beamformers are realized as hybrid or monolithically integrated analog sub-systems. Their wideband operation is plagued by higher loss, amplitude and phase misbalances, weight, complex integration, etc.
Kasemir, Paul +5 more
openaire +2 more sources
A low complexity hybrid combiner design for the ill‐conditioned multiuser mmWave massive MIMO uplink
IET Communications, 2021 This paper presents a simple and robust hybrid combiner for the multiuser massive multiple‐input multiple‐output (MIMO) uplink. The hybrid beamforming is used in massive MIMO systems to reduce the number of radio frequency chains.
Irfan Ahmed +2 more
doaj +1 more source
Performance Investigation on the High-Resolution Wide-Swath SAR System Operating in Stripmap Quad-Pol and Ultra-Wide Scansar Mode [PDF]
, 2011 The High-Resolution Wide-Swath (HRWS) is the spaceborne Synthetic Aperture Radar system, promoted by the German Aerospace Centre, conceived to obtain simultaneously high spatial resolution and width swaths.
Bordoni, Federica +5 more
core +1 more source