| AHL-Videos estupidos:"As aventuras do rapaz-fato-de-macaco - 158 sec
...
Auteur : Nunomattos
Tags:ORDFM
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| Simulator 256 OFDM WiMAX - 359 sec
Simulator 256 OFDM WiMAX
Auteur : gtph
Tags:Simulator 256 OFDM WiMAX Gabriel Irae
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| Spectrum sculpting using reconfigurable OFDM - 210 sec
This shows the power spectral density of a reconfigurable OFDM system created using the CTVR Plastic Project platform.
You may need to click on the resize button to view this properly.
The RF hardware used is the Universal Software Radio Peripheral by Ettus Research LLC (ettus.com). The centre frequency of this transmission is 2.35GHz, which is in one of the test bands licenced by ComReg for cognitive radio & dynamic spectrum access testing by CTVR.
This IFFT size used in this example is 256. The bandwidth of the transmitted OFDM signal is 1MHz. In this video, the number of subcarriers used is dynamically changed from 255 subcarriers (full bandwidth OFDM) right down to zero subcarriers and back again in various contiguous and non-contiguous configurations.
We use this ability to coexist with other spectrum users occupying the same frequency band. By creating nulls in the spectrum, interference to and from other users within these nulls can be minimised. Publications detailing the early experimental outcomes of this work can be found on www.ctvr.ie
For more information, contact:
Keith Nolan, CTVR. keithnolan AT mee.tcd.ie
Paul Sutton, CTVR. suttonpd AT tcd.ie
(replace AT with @)
Auteur : EmergingNetworks
Tags:ofdm reconfigurable radio plastic project usrp
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| Power spectral density of reconfigurable OFDM using the USRP - 205 sec
This is a close up of the power spectral density of a reconfigurable OFDM system created using the CTVR Plastic Project platform. The RF hardware used is the Universal Software Radio Peripheral by Ettus Research LLC (ettus.com). The centre frequency of this transmission is 2.35GHz, which is in one of the test bands licenced by ComReg for cognitive radio & dynamic spectrum access testing by CTVR.
This IFFT size used in this example is 256. The bandwidth of the transmitted OFDM signal is 1MHz. In this video, the number of subcarriers used is dynamically changed from 255 subcarriers (full bandwidth OFDM) right down to 1 subcarrier in various contiguous and non-contiguous configurations.
Auteur : EmergingNetworks
Tags:Spectrum
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| Lecture - 31 Fundamentals of OFDM - 3358 sec
Lecture Series on Digital Communication by Prof. Bikash. Kumar. Dey, Department of Electrical Engineering, IIT Bombay. For more details on NPTEL visit http://nptel.iitm.ac.in
Auteur : nptelhrd
Tags: Fundamentals of OFDM
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| OFDM in Schönebeck 06/07 - 416 sec
OFDM im Barfly Schönebeck
Auteur : metredeux
Tags: Rap Deutschrap
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| Horlin - OFDM - 269 sec
explication ofdm par horlin
Auteur : xaviersand
Tags: ulb polytech ofdm horlin
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| 94 GHz OFDM Frequency Scanning Radar - 54 sec
T/R Module Measurement in Receive Mode
Auteur : vcaeken
Tags: T/R Module
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| ofdm wireless transciever using acoustic channel using matla - 126 sec
ofdm wireless transciever using acoustic channel using matlab 7.0
Auteur : comsatian2008
Tags: ofdm wireless transciever using acoustic channel matlab 7.0
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| O.F.D.M. - 20 sec
Final de semana no vinil's farm
So besteira vtnc!!!!!
UWUWUWUWUWUWUW!!!!!!!!!!!!
Auteur : petersonescobar
Tags: O.F.D.M.
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| 94 GHz Slotted Waveguide for OFDM Frequency Scanning Radar - 14 sec
W-band S-parameter measurement of a 94 GHz slotted waveguide for OFDM frequency scanning radar
Auteur : vcaeken
Tags: OFDM Frequency Scanning Radar
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| O.F.D.M.² - 54 sec
Final de semana no vinil's farm
So besteira vtnc... ²
UWUWUWUWUWUWUWUWUWUWUWUWUWUWW
Auteur : petersonescobar
Tags: O.F.D.M.²
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| O.F.D.M.³ - 13 sec
Vinicius fazendo le parkour
in pontilão..
Auteur : petersonescobar
Tags: O.F.D.M.³
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| Main Moe & Doz9 in Delitzsch - 563 sec
19.10.2007 HipHop Night im YOZ in Delitzsch bei Leipzig. Doz9 (O.F.D.M.) und Main Moe. www.grammatikfreiezone.de
Auteur : primetimeryder
Tags:mainmoe doz9 ofdm hiphop rap live grammatikfreiezone yoz delitzsch
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| Interview of Dr.Getachew Jigi - 506 sec
He is the founding member and excutive committee member of OFDM(oromo federlistdemocratic movement)
Auteur : dhugaaf
Tags: Oromo Oromoo Oromia Ethiopia Meles OLF Oromiyaa OFDM Addis Ababa Eritrea Asmera Afaan
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| WARP MIMO Demo - 133 sec
Demonstration of a 2x2 MIMO OFDM wireless link using the WARP hardware and OFDM reference designs
Auteur : ricewarp
Tags:wireless mimo fpga warp rice
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| Kansas University @ IEEE DySPAN 2007 - 207 sec
Victor (Rory) Petty and Ted Weilding from the University of Kansas describe their Kansas University Agile Radio (KUAR). This was demonstrated at the 2007 IEEE DySPAN conference held in Dublin, Ireland. KUAR currently operates in the 5GHz band and employs orthogonal frequency division multiplexing (OFDM).
The Commission for Communications Regulation in Ireland (ComReg) issued a trial licence to CTVR and the collaborating groups for the month of April, which enabled these parties, with CTVR as the licensee, to carry out these trials and demonstrations in the greater Dublin area.
Further information is available at http://www.ieee-dyspan.com
Camera work, editing, and production by Kate McKeon. (more)
Auteur : EmergingNetworks
Tags:kansas university KUAR agile radio OFDM
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| Schizophrenia Trailer - 65 sec
Trailer zum Musikvideo
Auteur : BeatRaiderMD
Tags: Magdeburg MD BeatRaider Beat Instumental take walk Musik OfDM O.f.d.m. Trailer Shizo Schizophrenia unsigned megalearn
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| Impulse-based ultra-wide-band (UWB) radio systems and applications - 3727 sec
Google Tech Talks
May 22, 2008
ABSTRACT
The old idea of impulse radio dates back to Marconi's first wireless transmissions using sparks. Unlike
most wireless today, impulse radio transmissions are extremely wideband signals. The recently FCC-
released frequency band from 3.1GHz to 10.6GHz is the widest unlicensed frequency band ever released (7.5GHz). This ultra wide bandwidth (UWB) is commercially explored for even faster data transfer using traditional, multi-band (OFDM) RF techniques. However, the available bandwidth is wide enough for impulse radio transmission giving new functionality and new implementation challenges.
In this talk I will show how power efficient impulse radio solutions are feasible in standard digital CMOS
technology. Quite non-standard and untraditional design strategies must be used including time-domain
signal processing. Circuit topologies for higher order Gaussian pulse generation and power efficient,
correlating RAKE receivers will be explained. Impulse radio transmissions have additional interesting properties compared to narrowband modulation.
With time-domain processing (TDOA) highly accurate positioning is feasible in the millimeter range. Improved sensitivity for robust communication. Large number of channels (greater than 100).
Novel applications are also feasible using impulse transmission. Combining novel design techniques like
"Swept-Threshold sampling" and digital lossless integration, micropower impulse radar is feasible in
CMOS. A 60GHz sampler is used to accumulate and recover reflected electromagnetic energy. These
new sensing devices (medical radar) may be explored for reading vital body signs (pulse, breathing, blood pressure?) embedded in your car seat or hospital emergency bed (detached sensor). Just imagine what you can do looking though heavy matter! Single chip CMOS impulse radar will be demonstrated at the end of the talk.
Speaker: Tor Sverre Lande
Tor Sverre (Bassen) Lande is a professor in Microelectronics at the Dept. of Informatics, Univ. of Oslo. From 2004 he is also serving as visiting professor at Institute of Biomedical Engineering, Imperial College, London, UK. His primary research is related to microelectronics, both digital and analog. Research fields are Neuromorphic Engineering, analog signal processing, micropower circuit design, biomedical circuits and systems and impulse radio. He is the author or co-author of more than 90 scientific publications with chapters in two books.
Auteur : googletechtalks
Tags: google techtalks techtalk engedu talk talks googletechtalks education
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| The Streets - Blinded by the Lights BeatRaider VS Fuffel RMX - 300 sec
BeatRaider VS. Fuffel Remix
listen and support us
www.beatraider.de
Auteur : BeatRaiderMD
Tags: The Streets Blinded by the lights rmx remix beatraider magdeburg r&b rap unsigned alternative electronic hip hop ofdm
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