Results 21 to 30 of about 109,932 (312)
IEEE Access, 2020 It is difficult to recognize Automatic Link Establishment (ALE) behaviors of a short-wave radio station, if we do not acquire the radio station's communication protocol standard.
Zilong Wu +3 more
doaj +1 more source
Universe, 2023 In this study, we aim to analyze the electromagnetic interference (EMI) regarding the Five-hundred-meter Aperture Spherical radio Telescope (FAST) caused by base stations in the International Mobile Telecommunications-2000 (IMT-2000) frequency band.
Jian Wang +7 more
doaj +1 more source
Ionospheric electron heating, optical emissions, and striations induced by powerful HF radio waves at high latitudes: Aspect angle dependence [PDF]
, 2003 In recent years, large electron temperature increases of 300% (3000 K above background) caused by powerful HF-radio wave injection have been observed during nighttime using the EISCAT incoherent scatter radar near Tromsø in northern Norway.
Rietveld, M. T. +11 more
core +1 more source
Solar-Terrestrial Physics, 2016 We have considered the influence of the January 23–27, 2009 sudden stratospheric warming (SSW) event on HF radio wave propagation in the equatorial ionosphere. This event took place during extremely low solar and geomagnetic activity.
Kotova D.S. +5 more
doaj +1 more source
An Accurate Maritime Radio Propagation Loss Prediction Approach Employing Neural Networks
Remote Sensing, 2022 The radio propagation loss prediction model is essential for maritime communication. The oceanic tropospheric duct is much more complicated than the atmospheric structure on land due to the rough sea surface influence, and it leads to difficulties in ...
Shankun Shen +5 more
doaj +1 more source
An Inclusive Survey on Array Antenna Design for Millimeter-Wave Communications
IEEE Access, 2019 The enormous growth of wireless data traffic in recent years has made the millimeter-wave (mm-wave) technology as a good fit for high-speed communication systems. Extensive works are continuing from the device to system, to the radio architecture, to the
Saswati Ghosh, Debarati Sen
doaj +1 more source
Reconfigurable wideband patch antenna for cognitive radio [PDF]
, 2009 Cognitive radio communication is envisaged to be a new paradigm of methodologies for enhancing the performance of radio communication systems through the efficient utilization of radio spectrum.
AbuTarboush, HF +14 more
core +1 more source
Digital radio over fiber transmission technique for millimeter-wave radio access network
物联网学报, 2019 As the air interface standard of 5G confirms the millimeter wave as one important frequency band for the signal carrier,millimeter-wave communication is considered as the key technique to improve the transmission performance of the mobile communication ...
Jia YE, Jianwei LUO, Yi GUO, Wei PAN
doaj +2 more sources
A hybrid mode locked laser as millimetre wave modulated data source for radio-over-fiber systems [PDF]
, 2009 The paper presents a characterisation of a hybrid mode locked laser under external injection locking. It shows how such a system can be used to transmit baseband data without the requirement of an external ...
Cryan, MJ +3 more
core +1 more source
Millimeter-Wave Phased Arrays in Silicon [PDF]
, 2007 Integration of mm-wave multiple-antenna systems on silicon-based processes enables complex, low-cost systems for high-frequency communication and sensing applications.
Natarajan, Arun Sridhar
core +1 more source