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Measurements of Wind Profiler EMC Characteristics
Evaluation of Discrete Address Beacon System (DABS) EMC
The FAA is currently developing the Discrete Address Beacon System (DABS) as an evolutionary upgrading of the Air Traffic Control Radar Beacon System (ATCRBS). Questions have been raised regarding the Electromagnetic Compatibility (EMC) of ATCRBS and DABS because of their common channel usage. The committee on Science and Technology, U.S. House of Representatives, requested that the National Telecommunications and Information Administration (NTIA) review DABS as a radio telecommunication system giving particular attention to potential interference problems.
Progress towards BTOP Goals: Interim Report on PCC and SBA Case Studies
On September 20, 2010, the Department of Interior National Business Center’s Acquisition Services Directorate (AQD) on behalf of the National Telecommunications and Information Administration (NTIA) awarded a task order to ASR Analytics, LLC to obtain services to complete an Evaluation Study of the Broadband Technology Opportunities Program (BTOP).
A Guide to the Use of the ITS Irregular Terrain Model in the Area Prediction Mode
The ITS model of radio propagation for frequencies between 20 MHz and 20 GHz (the Longley-Rice model) is a general purpose model that can be applied to a large variety of engineering problems. The model, which is based on electromagnetic theory and on statistical analyses of both terrain features and radio measurements, predicts the median attenuation of a radio signal as a function of distance and the variability of the signal in time and in space.
Third Interim Progress Report on the Ten-Year Plan and Timetable
NTIA submits this Progress Report pursuant to the Presidential Memorandum issued on June 28, 2010, which directed the Department of Commerce, working through NTIA and in collaboration with the Federal Communications Commission (FCC), to identify and make available 500 megahertz of spectrum over the next ten years for expanded wireless broadband use.
Analysis and Resolution of RF Interference to Radars Operating in the Band 2700-2900 MHz from Broadband Communication Transmitters
Abstract: This report describes the methodology and results of an investigation into the source, mechanism, and solutions for radiofrequency (RF) interference to WSR-88D Next-Generation Weather Radars (NEXRADs). It shows that the interference source is nearby base stations transmitters in the Broadband Radio Service (BRS) and the Educational Broadband Service (EBS) and that their out-of-band (OOB) emissions can cause interference on NEXRAD receiver frequencies.
Antenna Models For Electromagnetic Compatibility Analyses
This technical memorandum contains recommendations for antenna models that can be used in performing electromagnetic compatibility (EMC) analysis related to spectrum management. The technical memorandum contains two compilations of antenna parameters. The first one is the collection of rules, regulations, and recommendations regarding antennas that are published by regulators, as well as improving, EMC. NTIA conducted an extensive review and analysis of the existing rules, regulations, and recommendations and compiled the findings in this technical memorandum. The second compilation is the recommendations of antenna parameters for spectrum managers to use in conducting EMC analysis associated with: system review for equipment approval, frequency assignment, and spectrum sharing studies. NTIA evaluated the characteristics of the radio services, the federal usage of the radio spectrum, and the technical merit and practicality of the antenna parameters in the rules, regulations, and recommendations, and then developed recommendations of antenna parameters for conducting these EMC analysis tasks of all of the radio services.
SUMMARY OF PUBLIC OUTREACH EFFORTS CONCERNING STATE AND LOCAL PUBLIC SAFETY SPECTRUM MANAGEMENT POLICIES & PROCEDURES
As required by the President’s Executive Memorandum on the Spectrum Policy Initiative, the Department of Commerce, through NTIA, conducted outreach in the form of public meetings to help in the development of recommendations to improve the public safety spectrum management process. Two separate events were held to solicit input. The first meeting, a Roundtable discussion with State and local public safety frequency coordinators, national public safety organizations, and public safety agencies, was held on November 12, 2003. The second meeting, held on February 10-11, 2004, included a much broader participation from the public safety community, academia, manufacturers, and the general public.
From these meetings, a comprehensive set of findings was extracted and are represented below. Specific supporting findings are detailed in Section 3. The combined findings of these two outreach efforts should be considered as broad in scope based on a limited investigation into the spectrum management issues of State and local public safety as they related to the four objectives in the memorandum. They are generally representative of the public safety community, but are not intended to be a finite and limiting set. Throughout the United States, there are reportedly as many as 55,000 public safety agencies of varying size, mission, and structure. Each has unique problems and solutions regarding its own communications requirements, issues and solutions. It may be unfair and unrealistic to assume that these findings are completely representative of this extraordinarily large base of users.
Final Report of the Public Safety Wireless Advisory Committee
This report represents the best efforts of the Public Safety community to define and document its critical need for communications resources and the spectrum which will support them — now and through the year 2010. The Final Report concludes that, unless immediate measures are taken to alleviate spectrum shortfalls and promote interoperability, Public Safety agencies will not be able to adequately discharge their obligation to protect life and property in a safe, efficient, and cost effective manner.
Fourteenth Quarterly Status Report to Congress Regarding BTOP
Pursuant to Section 6001(d)(4) of the American Recovery and Reinvestment Act of 2009 (ARRA or Recovery Act) (Public Law No. 111-5), the National Telecommunications and Information Administration (NTIA) provides this Quarterly Report on the status of the Broadband Technology Opportunities Program (BTOP or Program). This Report focuses on the Program’s activities from April 1 to June 30, 2012.