Results 21 to 30 of about 328,962 (374)
Intelligent Reflecting Surface Enhanced Wideband MIMO-OFDM Communications: From Practical Model to Reflection Optimization [PDF]
IEEE Transactions on Communications, 2020 Intelligent reflecting surface (IRS) is envisioned as a revolutionary technology for future wireless communication systems since it can intelligently change radio environment and integrate it into wireless communication optimization.
Hongyu Li +4 more
semanticscholar +1 more source
Wideband channel estimation for THz massive MIMO [PDF]
China Communications, 2021 Terahertz (THz) communication is considered to be a promising technology for future 6G network. To overcome the severe attenuation and relieve the high power consumption, massive multiple-input multiple-output (MIMO) with hybrid precoding has been widely
Jingbo Tan, L. Dai
semanticscholar +1 more source
On the Non-Coherent Wideband Multipath Fading Relay Channel [PDF]
, 2010 We investigate the multipath fading relay channel in the limit of a large bandwidth, and in the non-coherent setting, where the channel state is unknown to all terminals, including the relay and the destination.
Fawaz, Nadia, Medard, Muriel
core +1 more source
A Wideband Direct Data Domain Genetic Algorithm Beamforming [PDF]
, 2015 In this paper, a wideband direct data-domain genetic algorithm beamforming is presented. Received wideband signals are decomposed to a set of narrow sub-bands using fast Fourier transform.
Elkamchouchi, H. M., Hassan, M. M.
core +4 more sources
Wideband Beam Tracking in THz Massive MIMO Systems [PDF]
IEEE Journal on Selected Areas in Communications, 2020 Terahertz (THz) massive multiple-input multiple-output (MIMO) has been considered as one of the promising technologies for future 6G wireless communications.
Jingbo Tan, L. Dai
semanticscholar +1 more source
IEEE Access, 2017 An uni-directional antenna designed by resonance-based reflector has the merits of compact size, low-profile, and ultra-wide impedance bandwidth. However, its front to back ratio (FBR) bandwidth is narrow owing to the small reflection coefficient values ...
Lin Peng +3 more
doaj +1 more source
Tunable Triple-Band Terahertz Absorber Based on Bulk-Dirac-Semimetal Metasurface
IEEE Photonics Journal, 2021 A tunable triple-band absorber based on bulk-Dirac-semimetal (BDS) metasurface is proposed in the terahertz (THz) range. The design is comprised of a BDS film with a pattern of dual ring slots and a dielectric layer stacked on a fully reflective gold ...
Jiao Wang, Xinguo Wan, Yannan Jiang
doaj +1 more source
CPW Fed UWB Antenna by EBGs With Wide Rectangular Notched-Band
IEEE Access, 2016 Ultra-wideband (UWB) antennas with wide rectangular notched-band are proposed in this paper. The rectangular notched-band design is realized by placing dual mushroom-type electromagnetic-bandgap (EBG) structures on the CPW feeding line.
Lin Peng +4 more
doaj +1 more source
An Electrically Tunable Terahertz Filter Based on Liquid-Crystal-Filled Slits with Wall Corrugations
Photonics, 2022 We propose a type of hollow planar waveguide with corrugated walls, which can realize electrically tunable terahertz (THz) filtering by filling the slit with liquid crystals. When the THz signals propagate in a planar waveguide with periodic corrugations,
Shi-Yang Zhang +6 more
doaj +1 more source
Compact UWB Monopole for Multilayer Applications [PDF]
, 2006 A novel compact, dual layer UWB monopole antenna is presented. This low profile ultra-wideband antenna is fed by a 50 ? shielded strip-line with an array of metal vias making the conducting walls.
Bai, Qiang +3 more
core +1 more source