Search Results

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

Edwin L. Crow, “Statistical Methods for Estimating Time and Rate Parameters of Digital Communication Systems,” Technical Report NTIA TR-79-21, June 1979

Statistical methods are provided for estimating time and rate parameters of digital communication systems according to the specifications of the Proposed Federal Standard 1033. The methods may be applied to delay, disengagement, transfer and service ...

Richard G. FitzGerrell, Raymond D. Jennings, and John R. Juroshek, “Television Receiving Antenna System Component Measurements,” Technical Report NTIA TR-79-22, June 1979

Relative gain of fifteen television receiving antennas was measured as a function of frequency and azimuth angle. Input voltage standing-wave ratio was measured as a function of frequency to determine the scalar impedance properties of the antennas. ...

Randolph H. Ott, Lewis E. Vogler, and George A. Hufford, “Ground Wave Propagation Over Irregular, Inhomogeneous Terrain: Comparisons of Calculations and Measurements,” Technical Report NTIA TR-79-20, May 1979

An algorithm (PROGRAM WAGNER) that evaluates HF ground–wave attenuation over irregular, inhomogeneous terrain is used to compare calculated field strengths with observed measurements for 9 actual paths and frequencies ranging from 120 kHz to 50 MHz. ...

William A. Kissick, “Measurement Plan for the Calibration of the FAA/NAFEC Aircraft,” Measurement Report, May 1979

The basic reason for these measurements is to obtain a calibration constant for the Federal Aviation Administration's (FAA) flight inspection aircraft (a Convair 580). . . . In order to do this seemingly simple calibration, a known field strength is...

Joseph A. Hull, John M. Harman, Marylyn N. Olson, and H. David Hunt, “Emergency Medical Services Communications System Technical Planning Guide,” Special Publication NTIA SP-79-3, March 1979

This document is intended to provide guidance in planning Emergency Medical Systems [sic] (EMS) communications. Processes and and procedures are presented for such planning. Recommendations for obtaining technical, consultative and other assistance i...

Laurance G. Hause and David R. Wortendyke, “Automated Digital System Engineering Model,” Technical Report NTIA TR-79-18, March 1979

This report describes a desk-top computer system and mathematical models which were used in seven of its programs. These programs make key calculations in the design of line-of-sight microwave systems. The models have the following ranges; bit rates ...

National Telecommunications and Information Administration, “Fifth Report on Program for Control of Electromagnetic Pollution of the Environment: The Assessment of Biological Hazards of Nonionizing Electromagnetic Radiation,” Technical Report NTIA TR-79-19, March 1979

This report summarizes activities associated with the Federal Government's program to assess the biological effects of nonionizing electromagnetic radiation being coordinated by the National Telecommunications and Information Administration (NTIA). I...

H. J. Schlafly, R. E. Button, and B. L. Wormington, “The Initial Growth and Expanding Opportunities of U.S. Domestic Satellite Service,” eds. Transcommunications Corporation, Contractor Report NTIA CR-79-3, February 1979

Hans J. Liebe and Douglass D. Crombie, “Estimates of Maximum Electric Field Strengths in the Automobile Environment,” Technical Report NTIA TR-79-16, February 1979

Strong electromagnetic (EM) energy sources up into the microwave range are examined and estimates are made of maximum EM field conditions to which automobiles could be exposed. The results are meant to alert automotive engineers to potentially hazard...

David R. Wortendyke and T. H. Hildebrandt, “Received Signal Level (RSL) Measurements and Analysis with a Desk–Top Computer,” Technical Report NTIA TR-79-17, February 1979

A software package of programs has been developed which automatically measures and analyzes the received signal level of four microwave communication receivers. The package will run on the Test and Acceptance Calculator Instrumentation which the USAF...

Robert F. Linfield, “Control Signaling in a Military Switching Environment,” Technical Report NTIA TR-79-13, January 1979

A number of factors, including network topology, traffic characteristics, switching technology, and transmission media, affect the choice of control signaling techniques to be used in networks of the future. In this report these factors are considere...

Richard E. Skerjanec and Robert W. Hubbard, “Aircraft Obstruction of Microwave Links,” Technical Report NTIA TR-79-14, January 1979

Conversion to digital transmission has renewed the concerns about what effects aircraft obstruction of microwave links have on user quality. This is of particular concern where it is necessary to install a telecommunication system that crosses runway...

Jack T. Collins and Francis K. Steele, “An Additional Catalog of Programs and Data for 100 MHz - 100 GHz Radio System Predictions,” Technical Report NTIA TR-79-15, January 1979

The sole purpose of this publication is to provide the public with a list of existing computer aids for the evaluation of radio systems which operate in any part of the radio spectrum. Consequently, neither the Department of Commerce (DoC), nor t...

“FY 1978 Technical Progress Report,” Technical Progress Report, January 1979

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...

Leslie A. Berry and Eldon J. Haakinson, “Spectrum Efficiency for Multiple Independent Spread-spectrum Land Mobile Radio Systems,” Technical Report NTIA TR-78-11, November 1978

The use of spread-spectrum modulation in a common type of land-mobile radio service is studied. The radio service contains many networks operated independently, similar to the business land-mobile radio service. Network independence implies (among ot...

William A. Kissick, Eldon J. Haakinson, and Garth Hill Stonehocker, “Measurements of LF and MF Radio Propagation over Irregular, Inhomogeneous Terrain,” Technical Report NTIA TR-78-12, November 1978

Measurements of radio propagation path loss and local ground conductivity were made over four paths in the 100 to 2000 kHz band. The paths were of lengths up to 50 km and were chosen to represent both extreme and typical topography and conductivity c...

M. E. Johnson and G. D. Gierhart, “Aerospace Propagation Prediction Capabilities Associated with the IF-77 Model,” Conference Paper, November 1978

The United States Department of Commerce (DOC) has been active in radio wave propagation research and prediction for several decades, and has provided the Federal Aviation Administration (FAA) with many propagation predictions relevant to the covera...

Institute for Telecommunication Sciences, “Proceedings of the Seventh Annual Telecommunications for Government Workshop,” Conference Proceedings, November 1978

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 ...

Hiroshi Akima, Peter M. McManamon, and Paul I. Wells, “Fixed-Satellite and Broadcasting-Satellite Service Considerations for 1979 GWARC Planning,” Special Publication NTIA SP-78-2, October 1978

This publication discusses technical and economic aspects related to the fixed-satellite and broadcasting-satellite services. Planning studies in support of the 1979 General World Administrative Radio Conference (GWARC) are presented for the frequen...

Evan J. Dutton, “Earth-space Attenuation Predictions for Geostationary Satellite Links in the U.S.A., Oct. 1978,” Technical Report NTIA TR-78-10, October 1978

The previously developed Rice-Holmberg (RR) rainrate model and the Dutton-Dougherty (DD) attenuation model for earth-space links, and their subsequent modifications, are reviewed. Predictions are compared with data observed both from the Communicatio...