Results 21 to 30 of about 1,001,924 (298)

Utilization of photon orbital angular momentum in the low-frequency radio domain [PDF]

, 2007
We show numerically that vector antenna arrays can generate radio beams which exhibit spin and orbital angular momentum characteristics similar to those of helical Laguerre-Gauss laser beams in paraxial optics.
A. E. Siegman, B. Thidé, B. Thidé, C. Cohen-Tannoudji, E. Noether, G. A. Swartzlander, Jr., H. Then, J. Bergman, J. Schwinger, J. Sjöholm, K. Palmer, M. Ribarič, M. V. Berry, N. H. Ibragimov, R. Khamitova, S. H. Krishnamurthy, T. D. Carozzi, Ya. N. Istomin   +17 more
core   +3 more sources

Research on SAR data integrated processing methodology oriented on earth environment factor inversions

International Journal of Digital Earth, 2017
As an important advanced technique in the field of Earth observations, Synthetic Aperture Radar (SAR) plays a key role in the study of global environmental change, resources exploration, disaster mitigation, urban environments, and even lunar exploration.
Huadong Guo, Jie Chen, Xinwu Li, Lu Zhang, Wenjin Wu, Huiying Liu, Kai Wang, Zhuo Li, Xinwei Gu, Qingrong Hu, Xinmin Wang, Jun Li, Chunming Han, Junjie Zhu, Guozhuang Shen, Guang Liu, Wenxue Fu, Zhongchang Sun, Xiaoyang Wen   +18 more
doaj   +1 more source

Digital Transformation of Terrestrial Radio: An Analysis of Simulcasted Broadcasts in FM and DAB+ for a Smart and Successful Switchover

Applied Sciences, 2021
The process of digitizing radio is far from over. It is an important interdisciplinary aspect, involving Big Data and AI (Artificial Intelligence) when it comes to classifying and handling content, and an organizational challenge in the Industry 4.0 ...
Przemysław Falkowski-Gilski
doaj   +1 more source

AI-Managed Cognitive Radio Digitizers

IEEE Circuits and Systems Magazine, 2022
Peer ...
openaire   +3 more sources

Studi Perencanaan Migrasi Sistem Digital Oleh Penyelenggara Radio Trunking di Indonesia

Buletin Pos dan Telekomunikasi: Media Komunikasi Ilmiah, 2013
Sistem Radio Trunking merupakan sistem radio yang berbasis repeater untuk satu atau lebih menara dengan menggunakan lebih dari satu frekuensi, dimana pengguna secara semi-privat dapat memiliki kanal tersendiri untuk melakukan pembicaraan secara grup.
Awangga Febian Surya Admaja
doaj   +1 more source

Radio Emission and AGN Feedback in Post-starburst Galaxies [PDF]

, 2010
We investigate radio-mode AGN activity among post-starburst galaxies from the Sloan Digital Sky Survey to determine whether AGN feedback may be responsible for the cessation of star formation.
Adelman-McCarthy, Alexander, Allen, Balogh, Bardelli, Bardelli, Becker, Begelman, Bekki, Bell, Bender, Best, Bildfell, Bird, Blake, Bland-Hawthorn, Blundell, Bower, Brotherton, Brown, Buchanan, Bîrzan, Bîrzan, Canalizo, Cardiel, Chabrier, Charlot, Chi, Cid Fernandes, Ciotti, Ciotti, Ciotti, Condon, Croton, Davies, Dewangan, Dressler, Dressler, Emonts, Evans, Fabian, Falkenberg, Falkenberg, Fanaroff, Farrah, Georgakakis, Godambe, Goto, Goto, Goto, Gunn, Heckman, Helou, Hogg, Hopkins, Ivezić, Juett, Kaiser, Kauffmann, Kauffmann, Khalatyan, Kormendy, Liu, Liu, Lonsdale, Martin, Meier, Michael A. Strauss, Min-Su Shin, Mushotzky, Nesvadba, O'Dea, Oemler, Papadopoulos, Pipino, Poggianti, Quintero, Rafferty, Reviglio, Rita Tojeiro, Rupke, Salpeter, Sanders, Schawinski, Shabala, Shin, Shioya, Shlosman, Sijacki, Smith, Smolčić, Springel, Tadhunter, Tojeiro, Tojeiro, Tongue, Tran, Tremblay, Tremonti, Trichas, Vanden Berk, Veilleux, Vernaleo, Wang, Wills, Wilson, Yagi, Yamauchi, Yan, Yang, York, Yun, Zabludoff   +112 more
core   +4 more sources

The cosmic evolution of radio-AGN feedback to z=1 [PDF]

, 2014
This paper presents the first measurement of the radio luminosity function of 'jet-mode' (radiatively-inefficient) radio-AGN out to z=1, in order to investigate the cosmic evolution of radio-AGN feedback.
Best, P. N., Ker, L. M., Rigby, E. E., Sabater, J., Simpson, C.   +4 more
core   +1 more source

Low power all-digital radio-over-fiber transmission for 28-GHz band using parallel electro-absorption modulators [PDF]

, 2020
We present a low-power all-digital radio-over-fiber transmitter for beyond 28-GHz using sigma-delta modulation, a 140mW NRZ driver and parallel electro-absorption modulators. 5.25Gb/s (2.625Gb/s) 64-QAM is transported over 10-km SSMF at 1560nm with 7.6% (
Bauwelinck, Johan, Bogaert, Laurens, Breyne, Laurens, Declercq, J, Demeester, Piet, Lambrecht, Joris, Li, Haolin, Ossieur, Peter, Ramon, Hannes, Torfs, Guy, Van Kerrebrouck, Joris, Wu, Chia-Yi, Yin, Xin   +12 more
core   +2 more sources

Uporedni pregled standarda za digitalne tranking sisteme funkcionalnih mobilnih radio-veza / Comparative analysis of the standards for digital trunked mobile radio systems [PDF]

Vojnotehnički Glasnik, 2002
Za izgradnju funkcionalnih sistema mobilnih radio-veza danas se koriste tranking sistemi analognih i digitalnih mobilnih radio-veza. Zbog niza prednosti, tranking sistemi digitalnih mobilnih radio-veza sve vise potiskuju analogne tranking sisteme ...
Slađan Svrzić , Dragan Ćosović
doaj   +1 more source

Beamforming Techniques for Large-N Aperture Arrays

, 2010
Beamforming is central to the processing function of all phased arrays and becomes particularly challenging with a large number of antenna element (e.g. >100,000).
Adami, K Zarb, de Vaate, J. G. Bij, Faulkner, A J, Kant, G. W., Pickard, P.   +4 more
core   +1 more source