Results 21 to 30 of about 6,313,307 (213)
CHARACTERISTICS OF THE SHORT WAVE PROPAGATION FROM TOKYO TO SYOWA STATION, ANTARCTICA
Antarctic Record, 1968 Measurements of the field intensity of 6055 KHz (NSB, Nippon Short Wave Broadcasting), 9595 KHz (NSB) and 15300 KHz (NHK, Radio Japan) were made at Syowa Station in Antarctica, from April 1966 to January 1967.
Sadao HASEGAWA +2 more
doaj +1 more source
The performance enhancement of multibeam adaptive base-station antennas for cellular land mobile radio systems [PDF]
, 1990 The problem of meeting the proliferating demands for mobile telephony within the confinement of the limited radio spectrum allocated to these services is addressed.
MCGEEHAN, J +11 more
core +1 more source
IEEE Access, 2020 Fifth-generation (5G) cellular networks will almost certainly operate in the high-bandwidth, underutilized millimeter-wave (mmWave) frequency spectrum, which offers the potentiality of high-capacity wireless transmission of multi-gigabit-per-second (Gbps)
Anthony Ngozichukwuka Uwaechia +1 more
doaj +1 more source
Baseband Radio over Fiber Aided Millimeter-Wave Distributed Antenna for Optical/Wireless Integration [PDF]
, 2013 A Baseband Radio Over Fiber (BROF) architecture is proposed, where upto four Radio Frequency (RF) carriers can be generated, while using the heterodyne photo-detection of only two optical signals. This proposed BROF architecture has a star-like structure
Salman Ghafoor +7 more
core +2 more sources
The first Spanish Short Wave Stations: Development of radio & TV technology [PDF]
2010 Second Region 8 IEEE Conference on the History of Communications, 2010 In the thirties in Spain there were three big Short Wave Stations. One, belonging to Transradio Española in Aranjuez, 50 kilometers south of Madrid, which rendered radiotelegraphic services to the Canary Islands, Europe and America. Another, belonging to the Sociedad Anónima Radio Argentina (via Radiar), in Vallecas, on the outskirts of Madrid, also ...
openaire +2 more sources
Analysis on the Influence of the Height of Tower on Passive Interference in shortwave
E3S Web of Conferences, 2018 The passive interference of transmission lines to nearby radio stations may affect the effective reception and transmission of radio station signals. Therefore, the accurate calculation of the electromagnetic scattering of transmission lines under the ...
Lu Ying +3 more
doaj +1 more source
Analysis on the Influence of Transmission Lines span on Passive Interference in Shortwave
E3S Web of Conferences, 2018 The passive interference of transmission lines to nearby radio stations may affect the effective reception and transmission of radio station signals. Therefore, the accurate calculation of the electromagnetic scattering of transmission lines under the ...
Lu Ying +3 more
doaj +1 more source
IEEE Access, 2019 In this paper, we develop novel precoder and combiner schemes for multi-user hybrid digital-to-analog (D-A) beamforming for uplink massive multiple-input multiple-output millimeter wave (mm-Wave) systems, where the number of radio frequency chains is ...
Osama Alluhaibi +3 more
doaj +1 more source
Influence of heating experiments on parameters of Schumann resonances
E3S Web of Conferences, 2017 Recently the significant increase in intensity of researches in the field of the fissile impact on geophysical processes in various environments is noted.
Agranat Irina, Sivokon Vladimir
doaj +1 more source
Radio over fibre distribution systems for ultra-wide band and millimetre wave applications [PDF]
, 2011 Short range wireless technology such as ultra-wideband (UWB) and 60 GHz millimetre wave (mm-wave) play a key role for wireless connectivity in indoor home, office environment or large enclosed public areas.
Shams Eldin, Haymen
core +2 more sources