Table of Contents 19.0 Communications
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Base Station Antenna Selection for LTE Networks
White paper Base station antenna selection for LTE networks Ivy Y. Kelly, Ph.D. technology development strategist, Sprint Martin Zimmerman, Ph.D. Base Station Antenna engineering director, CommScope Ray Butler, MSEE Wireless Network Engineering vice president, CommScope Yi Zheng, Ph.D. Base Station Antenna senior engineer, CommScope December 2017 Contents Executive summary 3 Antenna overview 3 LTE fundamentals 3 Selecting the optimum antenna for your network 5 Conclusion 6 References 6 About the authors 7 commscope.com 2 Executive summary Rapid mobile data growth is requiring the industry to use more sophisticated, higher-capacity access technologies like LTE, which supports many advanced antenna techniques. LTE requires precise containment of RF signals used to transmit mobile data, which can only be accomplished with high-performance antennas. This paper gives an overview of antennas and their application in practical configurations for various types of LTE antenna techniques. Antenna overview Antenna parameters can be separated into two categories, as shown The first LTE specification is part of 3GPP Release 8, which was below. Primary parameters (Table 1) are those specifically mentioned frozen in December 2008. LTE-Advanced generally refers to the LTE when defining the type of antenna used in a particular application. features that are found in Release 10 and beyond. LTE-Advanced For a given antenna vendor, the primary parameters are enough to features include CA, eight-layer DL transmission, four-layer UL identify a specific model that can be used. Secondary parameters transmission, and enhanced inter-cell interference coordination (Table 2) are those that impact performance and can be used to (eICIC).2 Release 10 features are just now being deployed. -
Federal Communications Commission § 90.665
Federal Communications Commission § 90.665 § 90.656 Responsibilities of base sta- where within their authorized MTA, tion licensees of Specialized Mobile provided that: Radio systems. (1) The MTA licensee affords protec- (a) The licensees of base stations that tion, in accordance with § 90.621(b), to provide Specialized Mobile Radio serv- all sites for which applications were ice on a commercial basis of the use of filed on or prior to August 9, 1994. individuals, Federal government agen- (2) The MTA licensee complies with cies, or persons eligible for licensing any rules and international agreements under either subparts B or C of this that restrict use of frequencies identi- part will be responsible for exercising fied in their spectrum block, including effective operational control over all the provisions of § 90.619 relating to mobile and control stations that com- U.S./Canadian and U.S./Mexican border municate with the base station. The areas. base station licensee will be respon- (3) The MTA licensee limits its field sible for assuring that its system is op- strength at any location on the border erated in compliance with all applica- of the MTA service area in accordance ble rules and regulations. with § 90.671 and masks its emissions in accordance with § 90.669. (b) Customers that operate mobile (b) In the event that the authoriza- units on a particular Specialized Mo- tion for a previously authorized co- bile Radio system will be licensed to channel station within the MTA licens- that system. A customer that operates ee’s authorized spectrum block is ter- temporarily on more than one system minated or revoked, the MTA licens- will be deemed, when communicating ee’s co-channel obligations to such sta- with the other system, to be tempo- tion will cease upon deletion of the fa- rarily licensed to the other system and cility from the Commission’s licensing for that temporary period, the licensee record. -
SCS PACTOR 4 (Pdf)
1. Introduction 1 Introduction 1.1 SCS P4dragon, the next Generation Thank you for purchasing the SCS P4dragon DR7800 high performance HF radio modem. SCS modems are the original PACTOR mode modems developed by the people who have created all PACTOR modes. From SCS and SCS representatives, you will receive the best possible support and benefit from the concentrated knowledge of the PACTOR engineers who invented PACTOR. With the introduction of the P4dragon DR7800 modem, SCS also announces PACTOR-4 as a new mode of high performance data transmission over HF frequencies. P4dragon stands for high sophisticated algorithms of communication engineering and high computation power of the PACTOR modems of the fourth generation. 1.2 Packaging list This is a complete list of hardware and software supplied with the SCS P4dragon: • 1 x P4dragon DR7800 High Performance HF-Radio Modem • 1 x Installation Guide • 1 x SCS CD-ROM • 1 x 8 pole DIN cable • 1 x 13 pole DIN cable • 1 x USB cable • 1 x RJ45 Patch cable (with installed “network option”) 1.3 Requirements to operate a PACTOR Modem A transceiver capable of switching between transmit and receive within 20 ms. Most modern transceivers fulfill this requirement. A computer that provides an USB interface or Bluetooth capability. An appropriate terminal program to operate with a USB or Bluetooth virtual COM port. 1.4 About this installation guide This installation manual contains only relevant information about the installation of your SCS P4dragon modem and popular applications like HF email. You can find complete documentation and detailed descriptions of the command set of the P4dragon in the electronic version of the complete manual (PDF format) on the SCS CD-ROM supplied with your modem. -
Global Maritime Distress and Safety System (GMDSS) Handbook 2018 I CONTENTS
FOREWORD This handbook has been produced by the Australian Maritime Safety Authority (AMSA), and is intended for use on ships that are: • compulsorily equipped with GMDSS radiocommunication installations in accordance with the requirements of the International Convention for the Safety of Life at Sea Convention 1974 (SOLAS) and Commonwealth or State government marine legislation • voluntarily equipped with GMDSS radiocommunication installations. It is the recommended textbook for candidates wishing to qualify for the Australian GMDSS General Operator’s Certificate of Proficiency. This handbook replaces the tenth edition of the GMDSS Handbook published in September 2013, and has been amended to reflect: • changes to regulations adopted by the International Telecommunication Union (ITU) World Radiocommunications Conference (2015) • changes to Inmarsat services • an updated AMSA distress beacon registration form • changes to various ITU Recommendations • changes to the publications published by the ITU • developments in Man Overboard (MOB) devices • clarification of GMDSS radio log procedures • general editorial updating and improvements. Procedures outlined in the handbook are based on the ITU Radio Regulations, on radio procedures used by Australian Maritime Communications Stations and Satellite Earth Stations in the Inmarsat network. Careful observance of the procedures covered by this handbook is essential for the efficient exchange of communications in the marine radiocommunication service, particularly where safety of life at sea is concerned. Special attention should be given to those sections dealing with distress, urgency, and safety. Operators of radiocommunications equipment on vessels not equipped with GMDSS installations should refer to the Marine Radio Operators Handbook published by the Australian Maritime College, Launceston, Tasmania, Australia. No provision of this handbook or the ITU Radio Regulations prevents the use, by a ship in distress, of any means at its disposal to attract attention, make known its position and obtain help. -
Annual Report 2009
Annual Report 2009 Dear Fellow Stockholders, Once again it is time to extend a sincere welcome to all of our stockholders and thank you for your continued faith and confidence in and support of Globalstar. During 2009 we successfully met our financing challenges in a way other satellite companies are striving to replicate. 2009 was a difficult time for the Company but thanks to the perseverance and level of commitment from all of our investors and employees we have more than met these challenges. With only about 8 weeks to go before the expected delivery of the initial second-generation satellites I am pleased to provide you with a summary of our progress during 2009. MEETING THE RETAIL CONSUMER MARKET CHALLENGE One of the traditional barriers faced by the mobile satellite services industry has been the lack of mainstream retail consumer market acceptance. Globalstar is the first, and to this day the only, MSS provider to have successfully broken through this market barrier via the introduction of our revolutionary SPOT Satellite GPS Messenger™ product. Our challenge in 2009 was to continue to capitalize on, and further expand, this consumer success both domestically and around the world. We successfully met this challenge and grew our consumer market presence by expanding the mix of SPOT Satellite GPS Messenger retail products and services as well as the global distribution for our unique satellite messaging and tracking products. We introduced a new enhanced version of SPOT that is both easier to use and about 30 percent smaller and lighter than the original product. We also announced a suite of new SPOT value-added services such as our SPOT Assist Roadside and Maritime packages. -
GENERAL AVIATION ANTENNAS Clearly Better Performance—At Any Altitude
GENERAL AVIATION ANTENNAS Clearly better performance—at any altitude. RAMI antennas are known for their streamlined aesthetics, great value, and for what really matters when you're navigating at 24,000 feet: reliable performance. By maintaining our focus on antennas and keeping all of our design and manufacturing in house, the improvements will just keep on coming. COM VOR/LOC/GS Transponder/DME Transponder Marker Beacon GPS Antenna Diplexers/Splitter Base Station ELT Ground Vehicular Cable Assemblies COM AV‐10 Frequency: 118–137 MHz The AV‐10 is designed for high‐performance aircraft applications. It exhibits excellent electrical characteristics and incorporates an efficient aerodynamic 4‐bolt mounting base. The antenna essentially matches the styling of the communication antennas currently used on most singles and light twins. The antenna is designed to operate at speeds up to 350 mph and altitudes up to 50,000 ft. It has a drag force of 2.70 lb @ 250 mph. This antenna is a direct replacement for the CI 121. Antenna AV‐17 Frequency: 118–137 MHz The AV‐17 is designed specifically for mounting to the underside of an aircraft, providing an excellent radiation pattern for air‐to‐ground communications. It has a 4‐bolt mounting base and is low in profile. The antenna is designed to operate at speeds up to 350 mph and altitudes up to 50,000 ft. It has a drag force of 0.66 lb @ 250 mph. This antenna is a direct replacement for the CI 122. AV‐529 Frequency: 118–137 MHz The AV‐529 is designed for broadband communications (118‐137 MHz). -
59864 Federal Register/Vol. 85, No. 185/Wednesday, September 23
59864 Federal Register / Vol. 85, No. 185 / Wednesday, September 23, 2020 / Rules and Regulations FEDERAL COMMUNICATIONS C. Congressional Review Act II. Report and Order COMMISSION 2. The Commission has determined, A. Allocating FTEs 47 CFR Part 1 and the Administrator of the Office of 5. In the FY 2020 NPRM, the Information and Regulatory Affairs, Commission proposed that non-auctions [MD Docket No. 20–105; FCC 20–120; FRS Office of Management and Budget, funded FTEs will be classified as direct 17050] concurs that these rules are non-major only if in one of the four core bureaus, under the Congressional Review Act, 5 i.e., in the Wireline Competition Assessment and Collection of U.S.C. 804(2). The Commission will Bureau, the Wireless Regulatory Fees for Fiscal Year 2020 send a copy of this Report & Order to Telecommunications Bureau, the Media Congress and the Government Bureau, or the International Bureau. The AGENCY: Federal Communications indirect FTEs are from the following Commission. Accountability Office pursuant to 5 U.S.C. 801(a)(1)(A). bureaus and offices: Enforcement ACTION: Final rule. Bureau, Consumer and Governmental 3. In this Report and Order, we adopt Affairs Bureau, Public Safety and SUMMARY: In this document, the a schedule to collect the $339,000,000 Homeland Security Bureau, Chairman Commission revises its Schedule of in congressionally required regulatory and Commissioners’ offices, Office of Regulatory Fees to recover an amount of fees for fiscal year (FY) 2020. The the Managing Director, Office of General $339,000,000 that Congress has required regulatory fees for all payors are due in Counsel, Office of the Inspector General, the Commission to collect for fiscal year September 2020. -
TRB Straight to Recording for All Airport Advisories at Non-Towered
TRANSPORTATION RESEARCH BOARD TRB Straight to Recording for All Airport Advisories at Non-Towered Airports ACRP is an Industry-Driven Program ✈ Managed by TRB and sponsored by the Federal Aviation Administration (FAA). ✈ Seeks out the latest issues facing the airport industry. ✈ Conducts research to find solutions. ✈ Publishes and disseminates research results through free publications and webinars. Opportunities to Get Involved! ✈ ACRP’s Champion program is designed to help early- to mid- career, young professionals grow and excel within the airport industry. ✈ Airport industry executives sponsor promising young professionals within their organizations to become ACRP Champions. ✈ Visit ACRP’s website to learn more. Additional ACRP Publications Available Report 32: Guidebook for Addressing Aircraft/Wildlife Hazards at General Aviation Airports Report 113: Guidebook on General Aviation Facility Planning Report 138: Preventive Maintenance at General Aviation Airports Legal Research Digest 23: A Guide for Compliance with Grant Agreement Obligations to Provide Reasonable Access to an AIP-Funded Public Use General Aviation Airport Synthesis 3: General Aviation Safety and Security Practices Today’s Speakers Dr. Daniel Prather, A.A.E., CAM DPrather Aviation Solutions, LLC Presenting Synthesis 75 Airport Advisories at Non-Towered Airports ACRP Synthesis 75: Airport Advisories at Non- Towered Airports C. Daniel Prather, Ph.D., A.A.E., CAM DPrather Aviation Solutions, LLC California Baptist University C. Daniel Prather, Ph.D., A.A.E., CAM Principal Investigator • Founder, DPrather Aviation Solutions, LLC • Current Founding Chair and Professor of Aviation Science, California Baptist University • Former Assistant Director of Operations, Tampa International Airport • Instrument-rated Private pilot ACRP Synthesis 75 Topic Panel Kerry L. -
Choosing a Ham Radio
Choosing a Ham Radio Your guide to selecting the right equipment Lead Author—Ward Silver, NØAX; Co-authors—Greg Widin, KØGW and David Haycock, KI6AWR • About This Publication • Types of Operation • VHF/UHF Equipment WHO NEEDS THIS PUBLICATION AND WHY? • HF Equipment Hello and welcome to this handy guide to selecting a radio. Choos- ing just one from the variety of radio models is a challenge! The • Manufacturer’s Directory good news is that most commercially manufactured Amateur Radio equipment performs the basics very well, so you shouldn’t be overly concerned about a “wrong” choice of brands or models. This guide is intended to help you make sense of common features and decide which are most important to you. We provide explanations and defini- tions, along with what a particular feature might mean to you on the air. This publication is aimed at the new Technician licensee ready to acquire a first radio, a licensee recently upgraded to General Class and wanting to explore HF, or someone getting back into ham radio after a period of inactivity. A technical background is not needed to understand the material. ABOUT THIS PUBLICATION After this introduction and a “Quick Start” guide, there are two main sections; one cov- ering gear for the VHF and UHF bands and one for HF band equipment. You’ll encounter a number of terms and abbreviations--watch for italicized words—so two glossaries are provided; one for the VHF/UHF section and one for the HF section. You’ll be comfortable with these terms by the time you’ve finished reading! We assume that you’ll be buying commercial equipment and accessories as new gear. -
VHF Base Station Transceiver 75 Watt VHF Transceiver Type DCB 9140 IP
DATA SHEET DATA VHF Base Station Transceiver 75 Watt VHF Transceiver Type DCB 9140 IP The Danphone VHF base station transceiver type DCB 9140 IP is specifically designed to operate in the marine VHF band. The latest feature include built-in Voice over IP and DSC modem controlled via LAN. KEY FEATURES • GMDSS compliant • Voice over IP • Remote-control over IP • Built-in DSC modem option • Choice of single or dual receivers • Specifically designed and manufactured for 24/7 operation The transceiver connects with LAN, antenna and • Fully scalable from small ports to large power supply. national coastal radio systems In addition to VoIP and remote-control over IP, the • Proven and tested for operation under DCB9140 transceiver allows for local control via optional display and handset. harsh environments Nato Stock number: 5825-22-632-0324 TECHNICAL SPECIFICATIONS Danphone item number: 152.2024.001 CONNECTIONS LED INDICATORS • LAN • Green: power and health • RS422 • Red: TX • 13.2VDC • Green: Sq. RX2 • Auxiliary connector • Green: Sq: RX1 • TX antenna • RX antenna GENERAL TRANSMITTER RECEIVER REMOTE SETTINGS Frequency range RF output power RX sensitivity Channels 156 – 163 MHz 1-75 Watt adjustable Better than -117 dBm / 20 dB All international marine channels (up to 174 MHz upon request) SINAD before duplexer. Better than -119 dBm / 12 dB SINAD before duplexer Operating modes Spurious emission Spurious response Transmitter power level Duplex, Semi-Duplex, Simplex < -85 dB Relative Carrier Better than 80 dB 1–75 Watt Duty cycle Adjacent channel -
LMR Systems Are Terrestrially-Based, Wireless Communications Systems
THE LAND MOBILE RADIO (LMR) BACKGROUND SUMMARY LMR systems are terrestrially-based, wireless communications systems commonly used by federal, state, local, tribal, and territorial emergency responders, public works companies, and even the military to support voice and low-speed data communications. LMR systems have been deployed since the 1930s to support mission-critical voice communications. Over time, many public safety agencies have migrated from basic LMR systems to more advanced communications systems. LMR systems typically consist of handheld portable radios, mobile radios, base stations, a network, and repeaters. • Handheld portable radios are carried by public safety personnel and tend to have a limited transmission range. • Mobile radios are often located in vehicles and use the vehicle’s power supply and a larger antenna, providing a greater transmission range than handheld portable radios. • Base station radios are located in fixed positions, such as public safety answering points or dispatch centers, and tend to have the most powerful transmitters. • A network is required to connect the different base stations to the same communications system. • Repeaters are used to increase the effective communications range of handheld portable radios, mobile radios, and base station radios by retransmitting received radio signals. For decades, first responder public safety communications has been synonymous with push-to-talk (PTT) voice service provided by Land Mobile Radio (LMR) technology, i.e., the two-way radios used by police, fire, medical, and other emergency management personnel. Many agencies have moved from basic, conventional systems to more complex trunked systems. Conventional radio systems have dedicated frequencies and channels assigned to individual groups of users. -
Space Business Review
December 2010 - SPECIAL EDITION: THE TOP-10 SPACE BUSINESS STORIES OF 2010 – #1 – ECAs Take Center Stage #6 – Satellite Broadband Market Grows Export credit agencies played a major role in The FCC’s National Broadband Plan space financings in 2010. COFACE of stimulated wireless broadband applications France backed a $1.8b credit facility for by proposing terrestrial use of certain Iridium Communications Inc. for its licensed MSS S- and L-band spectrum while Iridium NEXT constellation, a $1.2b facility the Ka-band satellite broadband market for O3b Networks Limited and a $115m continued to grow with ViaSat reporting a loan for Hughes Network Systems, LLC. The 15% increase in subscribers and Hughes U.S. Ex-Im Bank loaned $215.6m to Avanti Communications surpassing 500,000 Communications Group plc, $171.5m to subscribers. Avanti Communications SES S.A. and $666m to Inmarsat plc for its launched the HYLAS 1 broadband satellite, Global Xpress™ program. LightSquared™ Inc. launched SkyTerra 1 #2 – Debt & Equity Markets Heat Up and Eutelsat launched KA-SAT. Markets end on a high note in 2010. SIRIUS #7 – Sea Launch Exits Ch. 11 XM Radio Inc. closed $910m in note offerings, Sea Launch Company successfully ViaSat, Inc. closed a public offering of 6.9m of completed its Chapter 11 reorganization its shares, Eutelsat S.A. refinanced €1.3b of process with Sea Launch S.a.r.l. as the debt, Inmarsat plc closed a debt facility of successor entity and Energia Overseas €225m, Avanti Communications raised Limited of Russia the new majority owner, approx. £70m in a share placement, Intelsat investing more than $140m in capital.