Search Results

The search returned 1,237 publication(s) on its.ntia.gov.

Charles M. Rush et al., “Impact of SPS Heating on VLF, LF, and MF Telecommunications Systems Ascertained by Experimental Means,” Technical Report NTIA TR-80-37, April 1980

This report summarizes the results of experiments undertaken to assess the potential impact of the operation of the Satellite Power System on the D and E regions of the ionosphere, and on telecommunication systems that are dependent upon the structur...

Robert L. Hinkle, “Spectrum resource assessment in the 2.7-2.9 GHz band, Phase II: LSR deployment in the Los Angeles and San Francisco areas (Report No. 3),” Technical Report NTIA TR-80-38, April 1980

The National Telecommunications and Information Administration (NTIA) in the Department of Commerce undertook a detailed program to investigate the feasibility of deploying the Limited Surveillance Radars (LSR) in the 2.7-2.9 GHz band in the Los Ange...

Charles M. Rush, Rayner K. Rosich, and Carlene M. Mellecker, “HF Radio Noise in the Topside Ionosphere,” Technical Report NTIA TR-80-33, February 1980

Radio noise of ground-based origin can be observed by a satellite borne receiver orbiting above the 2 region. The noise that is observed is a function of receiver frequency, satellite position, and local time at the sub-satellite point. A recently la...

Martin Nesenbergs and Robert F. Linfield, “Three Phases of Teletraffic Congestion in Military Access Areas,” Technical Report NTIA TR-80-34, February 1980

In military base access areas, akin to many commercial installations, the telecommunications traffic passes through several concentration and switching stages. Loads to server facilities are formed through mergers and branch outs of offered traffic s...

Eldon J. Haakinson, Edmond J. Violette, and George A. Hufford, “Propagation Effects on an Intervisibility Measurement System Operating in the SHF Band,” Technical Report NTIA TR-80-35, February 1980

A study was conducted to determine the limiting propagation effects on the performance of a microwave system that could be used to detect the optical visibility between two vehicles, separated by up to 10 km, in irregular, obstructed terrain. The stu...

H. David Hunt, “Simulation Modeling of Emergency Medical Services (EMS) Telecommunication Systems,” Special Publication NTIA SP-80-5, January 1980

Hiroshi Akima, “Sharing of the band 12.2–12.7 GHz between the broadcasting-satellite and fixed services,” Technical Report NTIA TR-80-32, January 1980

The United States Administration has proposed for the 1979 WARC (World Administrative Radio Conference) to move the BSS (broadcasting–satellite service) in ITU (International Telecommunication Union) Region 2 from the band 11.7–12.2 GHz to the band ...

“FY 1979 Technical Progress Report,” Technical Progress Report, January 1980

The Institute for Telecommunication Sciences (ITS) is the research and engineering laboratory of the National Telecommunications and Information Administration (NTIA) of the U.S. Department of Commerce (DOC). ITS provides technical support to NTIA in...

Joseph E. Farrow and Richard E. Skerjanec, “Performance of a Very Long 8 GHz Microwave Link,” Technical Report NTIA TR-79-31, November 1979

This paper discusses measurement of signals received over a 160-km (100-mile) line-of-sight microwave radio link operating at 8.4 GHz. Signals were recorded at both ends of the path at various times over a period of about 18 months. The effects of m...

John R. Juroshek, “Measurements of an FM receiver in FM interference,” Technical Report NTIA TR-79-27, October 1979

This report investigates the performance of an FM, landmobile, receiver in FM interference. Measurements are described showing the effects of multiple interfering FM signals as a function of modulation index, signal-to-interference ratio, signal-to-n...

Richard G. FitzGerrell, “Indoor Television Antenna Performance,” Technical Report NTIA TR-79-28, October 1979

The ability of a television receiving antenna to deliver adequate signal power to the terminals of its receiver is determined by its gain relative to a lossless half-wave dipole antenna. This report presents measured gain data for indoor television r...

Clark C. Watterson, “Methods of Improving the Performances of HF Digital Radio Systems,” Technical Report NTIA TR-79-29, October 1979

The bit–error–probability performances of HF digital radio systems with respect to channel and equipment additive, multiplicative, and nonlinear distortions are evaluated with respect to the nine system design features that affect the performances. T...

David R. Wortendyke, Albrecht P. Barsis, and R. R. Larsen, “Signal Level Distributions and Fade Event Analyses for a 5 GHz Microwave Link Across the English Channel,” Technical Report NTIA TR-79-30, October 1979

This report describes instrumentation for fading studies and measurement results over an 88-km multiple-diversity line-of-sight microwave link across the English Channel operating in the 4 to 5 GHz frequency range. Signal level and fade, duration sta...

Institute for Telecommunication Sciences, “Proceedings of the Eighth Annual Telecommunications for Government Workshop,” Conference Proceedings, October 1979

The Office of Telecommunications "Telecommunications for Government" conference provides a forum for discussion of selected telecommunications applied research/engineering efforts by representatives of Government Agencies. Current research programs ...

A. Glenn Hanson et al., “Optical Waveguide Communications Glossary,” Special Publication NTIA SP-79-4, September 1979

This document is a technical dictionary containing approximately 300 terms, concisely defined for the communication engineer, covering the field of optical fiber waveguide communications. It was superseded by NBS Handbook 140 of the same title issued...

Robert F. Linfield and Martin Nesenbergs, “Switch Element Capacities in Access Area Digital Switching Systems,” Technical Report NTIA TR-79-26, September 1979

The capacity of a digital circuit switching system is defined in terms of its four major elements: the traffic offered by the interface element, the maximum traffic carried by the switch matrix, the maximum number of call attempts handled by the cont...

John R. Juroshek, “A Compatibility Analysis of Spread-spectrum and FM Land Mobile Radio Systems,” Technical Report NTIA TR-79-23, August 1979

The possibility of overlaying a spread-spectrum system into frequency bands containing conventional FM land-mobile systems is examined. Overlaying here is interpreted as meaning the unrestricted operation of spread-spectrum and FM mobiles throughout ...

Robert W. Hubbard, “Investigation of Digital Microwave Communications in a Strong Meteorological Ducting Environment,” Technical Report NTIA TR-79-24, August 1979

This report describes an experiment conducted over a LOS microwave link off the coast of southern California. The objective was to determine the effect of known anomalous propagating conditions, caused by persistent temperature inversions in the atmo...

Robert L. Hinkle, Robert M. Pratt, and Jay S. Levy, “Spectrum resource assessment in the 2.7-2.9 GHz band Phase II: Radar signal processing (Report No. 2),” Technical Report NTIA TR-79-25, August 1979

The National Telecommunications and Information Administration (NTIA) in the Department of Commerce undertook a detailed program to investigate the signal processing properties of the primary radars in the 2.7 to 2.9 GHz band, and the Automated Radar...

M. E. Johnson and G. D. Gierhart, “Comparison of Measured Data with IF-77 Propagation Model Predictions,” Sponsor Report FAA-RD-79-9, August 1979

This report provides extensive comparisons of measured propagation data with predictions made by the IF-77 (ITS-FAA-77) and other propagation models. Although IF-77 was developed for aeronautical applications, it can be used for some point-to-point ...