EBU Tech 3313-2005 Band I Issues
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Atmospheric Downwelling Longwave Radiation at the Surface During Cloudless and Overcast Conditions. Measurements and Modeling
ATMOSPHERIC DOWNWELLING LONGWAVE RADIATION AT THE SURFACE DURING CLOUDLESS AND OVERCAST CONDITIONS. MEASUREMENTS AND MODELING Antoni VIÚDEZ-MORA ISBN: 978-84-694-5001-7 Dipòsit legal: GI-752-2011 http://hdl.handle.net/10803/31841 ADVERTIMENT. La consulta d’aquesta tesi queda condicionada a l’acceptació de les següents condicions d'ús: La difusió d’aquesta tesi per mitjà del servei TDX ha estat autoritzada pels titulars dels drets de propietat intel·lectual únicament per a usos privats emmarcats en activitats d’investigació i docència. No s’autoritza la seva reproducció amb finalitats de lucre ni la seva difusió i posada a disposició des d’un lloc aliè al servei TDX. No s’autoritza la presentació del seu contingut en una finestra o marc aliè a TDX (framing). Aquesta reserva de drets afecta tant al resum de presentació de la tesi com als seus continguts. En la utilització o cita de parts de la tesi és obligat indicar el nom de la persona autora. ADVERTENCIA. La consulta de esta tesis queda condicionada a la aceptación de las siguientes condiciones de uso: La difusión de esta tesis por medio del servicio TDR ha sido autorizada por los titulares de los derechos de propiedad intelectual únicamente para usos privados enmarcados en actividades de investigación y docencia. No se autoriza su reproducción con finalidades de lucro ni su difusión y puesta a disposición desde un sitio ajeno al servicio TDR. No se autoriza la presentación de su contenido en una ventana o marco ajeno a TDR (framing). Esta reserva de derechos afecta tanto al resumen de presentación de la tesis como a sus contenidos. -
Frequency Plans for Broadcasting Services by Juan Castro Broadcasting Services Division OVERVIEW
Frequency plans for broadcasting services By Juan Castro Broadcasting Services Division OVERVIEW . ITU Regions . Regional Plans . Regional Plans concerning TV broadcasting . Regional Plans concerning sound broadcasting . Article 4: Modifications to the Plans . Useful links ITU REGIONS REGIONAL PLANS - Definition . Regional agreements for: o specific frequency bands o specific region/area o specific services . Adopted by Regional Conferences (technical criteria + frequency plans) . Types of Plans: o Assignment Plans (stations) o Allotment Plans (geographical areas) TYPES OF REGIONAL PLANS . Assignment Plan: frequencies are assigned to stations Station 1 Frequencies f1, f2, f3… Station 3 Station 2 . Allotment Plan: frequencies are assigned to geographical areas Area 1 Frequencies f1, f2, f3… Area 3 Area 2 TV BROADCASTING REGIONAL PLANS . Regional Plans (in force) that concern television broadcasting: o Stockholm 1961 modified in 2006 (ST61) o Geneva 1989 modified in 2006 (GE89) o Geneva 2006 (GE06) TV REGIONAL PLANS: ST61 . ST61: Stockholm 1961 modified in 2006 In 2006 the bands 174-230 MHz and 470-862 MHz were transferred to GE06 Plan . Assignment Plan . Region: European Broadcasting Area (EBA) . Bands: o Band I: 47-68 MHz o Band II: 87.5-100 MHz o Band III: 162-170 MHz . Services: o Broadcasting (sound and television) TV REGIONAL PLANS: GE89 . GE89: Geneva 1989 modified in 2006 In 2006 the bands 174-230 MHz and 470-862 MHz were transferred to GE06 Plan . Assignment Plan . Region: African Broadcasting Area(ABA) . Bands: o Band I: 47-68 MHz o Band III: 230-238 and 246-254 MHz . Services: o Broadcasting (television only) TV REGIONAL PLANS: GE06 . GE06 (Digital Plan): There were 2 plans (analogue and digital). -
UHF-Band TV Transmitter for TV White Space Video Streaming Applications Hyunchol Shin1,* · Hyukjun Oh2
JOURNAL OF ELECTROMAGNETIC ENGINEERING AND SCIENCE, VOL. 19, NO. 4, 227~233, OCT. 2019 https://doi.org/10.26866/jees.2019.19.4.227 ISSN 2671-7263 (Online) ∙ ISSN 2671-7255 (Print) UHF-Band TV Transmitter for TV White Space Video Streaming Applications Hyunchol Shin1,* · Hyukjun Oh2 Abstract This paper presents a television (TV) transmitter for wireless video streaming applications in TV white space band. The TV transmitter is composed of a digital TV (DTV) signal generator and a UHF-band RF transmitter. Compared to a conventional high-IF heterodyne structure, the RF transmitter employs a zero-IF quadrature direct up-conversion architecture to minimize hardware overhead and com- plexity. The RF transmitter features I/Q mismatch compensation circuitry using 12-bit digital-to-analog converters to significantly im- prove LO and image suppressions. The DTV signal generator produces an 8-vestigial sideband (VSB) modulated digital baseband signal fully compliant with the Advanced Television System Committee (ATSC) DTV signal specifications. By employing the proposed TV transmitter and a commercial TV receiver, over-the-air, real-time, high-definition video streaming has been successfully demonstrated across all UHF-band TV channels between 14 and 69. This work shows that a portable hand-held TV transmitter can be a useful TV- band device for wireless video streaming application in TV white space. Key Words: DTV Signal Generator, RF Transmitter, TV Band Device, TV Transmitter, TV White Space. industry-science-medical (ISM)-to-UHF-band RF converters I. INTRODUCTION [3, 4] is a TV-band device (TVBD) to enable Wi-Fi service in a TVWS band. -
Chapter 8 Propagation
General License Class 1 General Class Chapter 8 Propagation 2 1 The Ionosphere Regions • Ionosphere. • The ionosphere is a portion of the atmosphere that extends from about 30 miles to about 300 miles above the surface of the Earth. • The ionosphere reaches its highest altitude when the sun is directly overhead. • Solar radiation causes atoms in the ionosphere to become ionized. 3 The Ionosphere Regions • Ionosphere. • The ionosphere organizes itself into regions or “layers”. • The layers vary with the strength of the ionization. • The D-region disappears at night. • The F-region splits into F1 & F2 regions during the day. 4 2 The Ionosphere Regions • D-Layer. • 30-60 miles altitude. • Rapidly disappears at sunset. • Rapidly re-forms at sunrise. • Absorbs long wavelength radio waves. • 160m, 80m, & 40m. 5 The Ionosphere Regions • E-Layer. • 60-70 miles altitude. • One hop up to 1200 miles. • Similar to the D-layer. • The E-layer lasts longer into the night than the D-layer. • The E-layer has less absorption than the D-layer. 6 3 The Ionosphere Regions • E-Layer. • The E-layer is where the following types of propagation occur: • Auroral propagation. • Sporadic-E skip. • 10m, 6m, & 2m. • Meteor Scatter. 7 The Ionosphere Regions • F-Layer. • 100-300 miles altitude. • One-hop up to 2500 miles. • During periods of high sunspot activity, the F-layer can remain ionized all night. 8 4 The Ionosphere Regions • F-Layer. • The F-layer splits into the F1- layer & the F2-layer during the day. • F1-layer = 100-140 miles. • F2-layer = 200-300 miles. -
Vhf-Uhf Digest E-Zine Version
The Worldwide TV-FM DX Association Serving the VHF-UHF Enthusiast VHF-UHF DIGEST E-ZINE VERSION MARCH 2002 The VHF-UHF Digest is the official publication of the Worldwide TV-FM DX Association dedicated to the observation and study of the propagation of long distance television and FM broadcasting signals at VHF and UHF. The WTFDA is governed by a board of directors: TOM BRYANT, GREG CONIGLIO, BRUCE HALL, DAVE JANOWIAK AND MIKE BUGAJ. WHEN IS YOUR MEMBERSHIP UP? CONTENTS In order to keep your VUD arriving at your Page Two home without interruption, look for your name Mailbox on this list. Your membership ends on the last FM News. ..Greg Coniglio day of the month shown. Renew early! TV News...Doug Smith Western TV DX...Victor Frank March Eastern TV DX…Matt Sittel Edward Cotton Aaron Mitterling Bill Draeb Gerard Hart Southern FM DX…John Zondlo Bill Dvorak Thomas Leu Photo News…Jeff Kruszka Pat Dyer Jim Pizzi TV Statistics…Fred Nordquist Carlon Howington Joseph Smith Jr Northern FM DX…Keith McGinnis Scott Steenhusen Richard Steinberger Satellite News…George Jensen Phil Sullivan Peter V. Taylor Mid-Latitude SpE Part III…Mike Hawk David Cox Allan Dunn CA Highway Patrol Freqs Frank Drobny Dave Nieman Sign-up/Renewal Form and addresses Ryan Grabow William Hepburn Paul Crego Luis Franceschi Joseph Kureth Jr. Alex Cruz This month we continue with Mike Hawk’s April article on Sporadic E. We also provide a list for Eric Fader John Hourigan those of you interested in 42mhz skip of CHP Dan Oetting William Thompson frequencies that includes each office’s ID Larry Weisberg James Ivil number. -
Radio Wave Propagation References
RADIO WAVE PROPAGATION REFERENCES “Almost Everything You Need to Know…”: Chapter 7: 53-68 “RAC Basic Study Guide 6th Ed:” 6.2, 6.3, 6.4, 6.5, 6.6, 6.8, 6.9, 6.10 “RAC Operating Manual 2nd Ed:” “The ARRL Handbook For Radio Amateurs 2001,78thEd:” Chapter 21: 1-37 "Radio Propagation" Wikipedia, The Free Encyclopedia. 6 Nov 2007 http://en.wikipedia.org/ “Chelmsford Amateur Radio Society” Intermediate Course (5) Antennas and Feeders TOC: •INTRO •RADIO WAVES •POLARIZATION •LINE OF SIGHT, GROUND & SKY WAVES •IONOSPHERE REGIONS •IONOSPHERIC LAYERS •PROPAGATION, HOPS, SKIPS ZONES •ABSORPTION AND FADING •SOLAR ACTIVITY AND SUN SPOTS •MF, HF CRITICAL FREQUENCIES •UHF, VHF, SPORADIC E, AURORAS, DUCTING •SCATTER, HF, VHF,UHF Major General Urquhart: “My communications are completely broken down. Do you •BEACONS really believe any of that can be helped by a cup of tea?” •SAMPLE QUESTIONS Corporal Hancock: “Couldn't hurt, sir” -Arnhem 1944 PROPAGATION - INTRO Propagation: How radio waves travel from point A to point B; and the events occurring in the transmission path that affect the communications between the points, stations, or operators. When the electrons in a conductor, (antenna wire) are made to oscillate back and forth, Electromagnetic Waves (EM waves) are produced. These waves radiate outwards from the source at the speed of light, 300 million meters per second. Light waves (waves we see) and radio waves (waves we hear)are both EM waves, differing only in frequency and wavelength. PROPAGATION – INTRO CONT’D EM waves travel in straight lines, unless acted upon by some outside force. They travel faster through a vacuum than through any other medium. -
HF Propagation and Sporadic-E — a Case Study: WRTC 2010 Presented at Joint PVRC-NCCC Webinar Tuesday, Nov
HF Propagation and Sporadic-E — a Case Study: WRTC 2010 Presented at Joint PVRC-NCCC Webinar Tuesday, Nov. 23, 2010 By Dean Straw, N6BV Senior Assistant Technical Editor, ARRL (Retired) 1 On May 24, 1844, Samuel Morse delivered the following message, the first ever sent by telegraph: • “What hath God wrought?” 2 I’m going to suggest that during WRTC 2010, “What hath God wrought” was widespread Sporadic-E throughout Europe. • And Sporadic-E made WRTC 2010 very exciting indeed! But there is a cautionary tale in this… the “back story” in this talk. 3 What is WRTC? — the World Radiosport Team Championship • About 50 2-person teams operate in a special 24-hour contest. 4 What is WRTC? — the World Radiosport Team Championship • About 50 2-person teams operate in a special 24-hour contest. • Often called the “Ham Radio Olympics.” 5 What is WRTC? — the World Radiosport Team Championship • About 50 2-person teams operate in a special 24-hour contest. • Often called the “Ham Radio Olympics.” • Usually held every four years in different locations around the world (Seattle (1990), San Francisco, Slovenia, Finland, Brazil and Moscow, so far). 6 What is WRTC? — the World Radiosport Team Championship • About 50 2-person teams operate in a special 24-hour contest. • Often called the “Ham Radio Olympics.” • Usually held every four years in different locations around the world (Seattle (1990), San Francisco, Slovenia, Finland, Brazil and Moscow, so far). • It’s a “contest in a contest” within the IARU (International Amateur Radio Union) HF Championship contest in early July. -
Worldwide Occurrence of Sporadic E
TECH R.I.O- NATL INST OF STANDARDS& All 101 888875 Standards circular f/V8S /National Bureau O' QC100 Pub!}- oations c U. , >. Dejiartmeut of Comijierce 1 K a c 1 o y.a a ] B n r e a. u of Stab da t. d s Circular 582 UNITED STATES DEPARTMENT OF COMMERCE • Sinclair Weeks, Secretary NATIONAL BUREAU OF STANDARDS • A. V. Ascin, Director Worldwide Occurrence of Sporadic E Ernest K. Smith, Jr. National Bureau of Standards Circular 582 Issued March 15, 1957 For sale by the Superintendent of Documents, U. S. Government Printing Office, Washington 25, D. C. Price $3.25 (Buckram) National Bureau of Standards MAY 1 0 1957 ^ 116.5’ UB5E C op' Foreword This Circular marks the conclusion of a general study of sporadic E which has been carried on for the last three years, first at Cornell on a part-time basis and since September 1954 at the National Bureau of Standards Central Radio Propagation Laboratory at Boulder, Colorado, on a full-time basis. Although the actual research described in this report was performed almost entirely at CRPL many of the techniques used grew out of the work at Cornell. In both cases the work was sponsored by the Signal Corps. The Circular is essentially identical to the writer’s Ph. D. thesis at Cornell University, which was approved there in December 1955. A. V. Astin, Director. — ui \ f Contents Page Page Foreword n Chapter II. Vertical-incidence sporadic-!? data Continued Contents in G. Frequency dependence of vertical-inci- List of tables iv dence Es— Continued 2. -
Federal Communications Commission Record FCC 90·136
5 FCC Red No. 15 Federal Communications Commission Record FCC 90·136 national and international leaders into our homes, mak Before the ing us witnesses to hisrory. It entertained us. Each night Federal Communications Commission families and friends gathered around the radio and tuned Washington, D.C. 20554 to AM stations to learn of world. national and local events and to hear the latest episode in their favorite radio show. During the last twenty years, however, channel conges tion, interference and low fidelity receivers have taken MM Docket No. 87·267 their tolL dulling the competitive edge of this once vital service. Not surprisingly, once loyal AM listeners have In the Matter of shifted their allegiance to newer mass media services that offer them higher technical quality. Review of the Technical 2. As a result of these developments, the once preemi Assignment Criteria for the nent AM service is now in critical need of attention. For the past several years the Commission has involved itself AM Broadcast Service in an intensive effort to identify the service's most press ing problems and the sources of and solutions to those problems. In September of last year we challenged broad· NOTICE OF PROPOSED RULE MAKING casters, radio manufacturers and the listening public to tell us how we could revitalize the AM radio service. In Adopted: April 12, 1990; Released: July 18, 1990 an en bane hearing lasting a full day in November they responded to the challenge. Their response reaffirms our By the Commission: Commissioner Barrett issuing a conviction that a concerted effort by this Commission, the separate statement. -
Tr 103 399 V1.1.1 (2019-04)
ETSI TR 103 399 V1.1.1 (2019-04) TECHNICAL REPORT System Reference document (SRdoc); Fixed and in-motion Earth stations communicating with satellites in non-geostationary orbits in the 11 GHz to 14 GHz frequency band 2 ETSI TR 103 399 V1.1.1 (2019-04) Reference DTR/ERM-532 Keywords broadband, satellite, SRdoc ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16 Siret N° 348 623 562 00017 - NAF 742 C Association à but non lucratif enregistrée à la Sous-Préfecture de Grasse (06) N° 7803/88 Important notice The present document can be downloaded from: http://www.etsi.org/standards-search The present document may be made available in electronic versions and/or in print. The content of any electronic and/or print versions of the present document shall not be modified without the prior written authorization of ETSI. In case of any existing or perceived difference in contents between such versions and/or in print, the prevailing version of an ETSI deliverable is the one made publicly available in PDF format at www.etsi.org/deliver. Users of the present document should be aware that the document may be subject to revision or change of status. Information on the current status of this and other ETSI documents is available at https://portal.etsi.org/TB/ETSIDeliverableStatus.aspx If you find errors in the present document, please send your comment to one of the following services: https://portal.etsi.org/People/CommiteeSupportStaff.aspx Copyright Notification No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm except as authorized by written permission of ETSI. -
A Study on Regulatory Guideline for the Wireless Network Design in Digital L&C System
KINS/HR-749 as D|X|@ Tll&XHOMI# Y-fd St! Ml E o|H *|7||o|| ifxii 7|# 7h ^oii A Study on Regulatory Guideline for the Wireless Network Design in Digital l&C System 2006tJ 69 30ti y^yx^Bfo|.y 7|-y X-1 in 44444444 44 ^ c]x]^ ^ ^ iiim^a ^^Ml 444 44 4# ;H44 44 44"4^1 (4444 "444 4444 444444 444 44 44") 4 4JZ4& 4 #444. 2006. 06. 30. 4444444 : 4 4 4 # 4 4 4 4444444 : 4 4 # 4 4 4 4 4# f! : 4 4 # // : 4 4 4 o 4 I. 4 4 44 4^447114 44 44 MM^a 4M|M| 4^4 if4] 7]# H. 447HVd-4 4& ^ ^^4 O 4 4 4 44 M|^M|47||4 44 ^4 lljEOjg. 4M1M] ffM| 7]# 7)jM}. m. 447HVd4 MI4 ^ ^4 44-#-4 Ml 1 vl 51 7) ^7]#^4 9d 44 id 74 1:| ^1 i! MMMM id4M] id-9. id n'4 Ml mi|a 7|^- m-44^- 44 id 4 4 ^1 id Ml4 4 4 7j] 4 4444 Ml mil n 44M] 4-9. id 4 M| #4 44 i! M 444 51 s14 51411=4 -/ 444 4 m td7ii 7ie -id 4 4^1 444 1 4; id 4 4 44: -rid M|K i]a Ml 4 Ef 44 /I# 44 IV. 4474444 o C]xj^ 44 4 M|. 4 a Ml Ml# 4#444 44# 44 44- 447|4 4 7|14# #4444 4M] 44 4 #4.xfxil Ml 44 Ml 4-4 47M 4M| ci/b/g jE4 7]^, Wi-Fi 7]#. -
Report ITU-R BT.2295-3 (02/2020)
Report ITU-R BT.2295-3 (02/2020) Digital terrestrial broadcasting systems BT Series Broadcasting service (television) ii Rep. ITU-R BT.2295-3 Foreword The role of the Radiocommunication Sector is to ensure the rational, equitable, efficient and economical use of the radio- frequency spectrum by all radiocommunication services, including satellite services, and carry out studies without limit of frequency range on the basis of which Recommendations are adopted. The regulatory and policy functions of the Radiocommunication Sector are performed by World and Regional Radiocommunication Conferences and Radiocommunication Assemblies supported by Study Groups. Policy on Intellectual Property Right (IPR) ITU-R policy on IPR is described in the Common Patent Policy for ITU-T/ITU-R/ISO/IEC referenced in Resolution ITU-R 1. Forms to be used for the submission of patent statements and licensing declarations by patent holders are available from http://www.itu.int/ITU-R/go/patents/en where the Guidelines for Implementation of the Common Patent Policy for ITU-T/ITU-R/ISO/IEC and the ITU-R patent information database can also be found. Series of ITU-R Reports (Also available online at http://www.itu.int/publ/R-REP/en) Series Title BO Satellite delivery BR Recording for production, archival and play-out; film for television BS Broadcasting service (sound) BT Broadcasting service (television) F Fixed service M Mobile, radiodetermination, amateur and related satellite services P Radiowave propagation RA Radio astronomy RS Remote sensing systems S Fixed-satellite service SA Space applications and meteorology SF Frequency sharing and coordination between fixed-satellite and fixed service systems SM Spectrum management Note: This ITU-R Report was approved in English by the Study Group under the procedure detailed in Resolution ITU-R 1.