Adaptive multi-channel MAC protocol for dense VANET with directional antennas [PDF]
, 2009 Directional antennas in Ad hoc networks offer more benefits than the traditional antennas with omni-directional mode. With directional antennas, it can increase the spatial reuse of the wireless channel.
Huang, Benxiong +3 more
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Antenna Placement Designs for Distributed Antenna Systems with Multiple-Antenna Ports [PDF]
2012 IEEE Vehicular Technology Conference (VTC Fall), 2012 In this paper, we optimize antenna locations for a distributed antenna system (DAS) with distributed antenna (DA) ports equipped with multiple antennas under per-DA port power constraint. Maximum ratio transmission and scaled zero-forcing beamforming are employed for single-user and multi-user DAS, respectively.
Changhee Lee, Eunsung Park, Inkyu Lee
openaire +2 more sources
Broadband and Low-Profile Penta-Polarization Reconfigurable Metamaterial Antenna
IEEE Access, 2020 In this paper, a penta-polarization reconfigurable antenna with mushroom-type metamaterial loading is proposed, which can operate in x-direction linear polarization (x-LP), y-LP, 45°-LP, left-hand circular polarization (LHCP) and right-hand ...
Peng Liu +4 more
doaj +1 more source
Binary phase-controlled multi-beam-switching antenna array for reconfigurable 5G applications
EURASIP Journal on Wireless Communications and Networking, 2019 The paper presents a two-phase state based multi-beam-switching scheme implemented on a custom-designed 4 × 4 antenna array operating with a bandwidth of 1.5 GHz around 14 GHz.
Vedaprabhu Basavarajappa +3 more
doaj +1 more source
Electromagnetic radiation by antennas of arbitrary shape in a layered spherical media [PDF]
, 2009 A unified method of moments model is developed for the analysis of arbitrarily shaped antennas that are radiating next to a multilayered dielectric sphere.
Khamas, S.K.
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Quasi-optics-inspired low-profile endfire antenna element
EURASIP Journal on Wireless Communications and Networking, 2019 In this paper, the design, operational principle and experimental validation of an endfire antenna element that is inspired by the energy-focusing characteristics of graded-index optical fibre are presented.
Vedaprabhu Basavarajappa +3 more
doaj +1 more source
Parallel-Interference-Cancellation-Assisted Decision-Directed Channel Estimation for OFDM Systems using Multiple Transmit Antennas [PDF]
, 2005 The number of transmit antennas that can be employed in the context of least-squares (LS) channel estimation contrived for orthogonal frequency division multiplexing (OFDM) systems employing multiple transmit antennas is limited by the ratio of the ...
Hanzo, L., Munster, M.
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IEEE Access, 2017 A novel dual-broadband dual-polarized base station antenna array with compact structure and low profile is proposed in this paper for the existing mobile communication system operating over 0.79-0.96 GHz (European Digital Dividend/CDMA/GSM) and 1.71-2.17
Yejun He, Wei Tian, Long Zhang
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Compact and Wideband Differentially Fed Dual-Polarized Antenna With High Common-Mode Suppression
IEEE Access, 2019 A compact and wideband differentially fed dual-polarized antenna with high common-mode suppression is investigated in this paper. A square patch with crossed-slot consisting of four slant funnel-shaped slots is used as the radiator, generating slant ...
Zhao Zhou +4 more
doaj +1 more source
Diversity-Multiplexing Gain Trade-off of a MIMO System with Relays [PDF]
, 2007 We find the diversity-multiplexing gain trade-off of a multiple-antenna (MIMO) system with M transmit antennas, N receive antennas, R relay nodes, and with independent Rayleigh fading, in which the relays apply a distributed space-time code.
Hassibi, Babak, Rao, Chaitanya
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