Search Results

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

David Middleton, “Statistical-Physical Models of Man-Made and Natural Radio Noise Part IV: Determination of the First-Order Parameters of Class A and B Interference,” Technical Report NTIA CR-78-2, September 1978

Methods of determining the first-order parameters of both the approximate and exact Class A and B models are derived, for both the ideal case of infinite sample data the practical cases of finite data samples. It is shown that all (first order) param...

Robert F. Linfield and Thijs de Haas, “Interfacing the Automated Maritime Mobile Telephone System with the U.S. public switched telephone network,” Technical Report NTIA TR-78-7, August 1978

This report summarizes the characteristics of the U. S. public switched network and the maritime radio service, which impact the development of an Automated Maritime Mobile Telephone System (AMMTS). Features and performance parameters which appear de...

Evan J. Dutton and Harold T. Dougherty, “Estimates of the Atmospheric Transfer Function at SHF and EHF,” Technical Report NTIA TR-78-8, August 1978

Known theory is applied to examine the channel transfer function for earth/space propagation paths through the atmosphere and over t he frequency range from 10 to 350 GHz. The associated attenuation and phase-delay characteristics are separated into...

Paul I. Wells, “Current Activities in Small Earth Terminal Satellite Domestic Telecommunications,” Technical Report NTIA TR-78-9, August 1978

This report discusses the recent, current, and planned activities in domestic satellite communications in the United States. The present satellites in the domestic satellite service are discussed and the general technical characteristics are pres...

National Telecommunications and Information Administration, “ A Summary of the Federal Government’s Use of the Radio Frequency Spectrum,” Special Publication, July 1978

This 27-page report details use of the electromagnetic radio spectrum by U.S. Government military services and U.S. Government civil agencies. It also includes a list of Selected Government Frequency Assignment Data as of June 1, 1978.

David Middleton, “Statistical-Physical Models of Man-Made and Natural Radio Noise Part lll: First-Order Probability Models of the Instantaneous Amplitude of Class B Interference,” Technical Report NTIA CR-78-1, June 1978

This report is the third in a continuing series devoted to the development of analytically tractable, statistical-physical models of man-made and natural electromagnetic interference. Here, the first-order statistical probability densities (PDFs) and...

Robert W. Hubbard, Robert F. Linfield, and William J. Hartman, “Measuring Characteristics of Microwave Mobile Channels,” Technical Report NTIA TR-78-5, June 1978

This report describes the application of a high resolution (6 ns) pseudo-random noise (PN) channel probe for evaluating the transmission character of a land–mobile communication channel. Preliminary measurements were performed at a microwave frequen...

John R. Juroshek, “A Preliminary Estimate of the Effects of Spread–spectrum Interference on TV,” Technical Report NTIA TR-78-6, June 1978

The report examines the conditions under which spread–spectrum, land–mobile radio, and television can share spectrum. After a preliminary assessment, the report concludes that the interference caused by a constant amplitude, spread–spectrum system sh...

Eldon J. Haakinson, “Spread Spectrum: An Annotated Bibliography,” Special Publication NTIA SP-78-1, May 1978

Spread spectrum (SS) systems either are being planned or are already operational in the communications, radar, and navigation services. Since SS systems tend to increase the efficient use of the increasingly congested radio spectrum, spectrum manage...

Leslie A. Berry, “Effects of Local and Skywave Interference on CB Radio Range,” Technical Report NTIA TR-78-1, May 1978

The combined effects of local interference, skywave ("skip") interference, and radio noise on Citizens Band radio range are calculated. If the ionosphere reflectivity is normal or above normal during the next solar cycle, and CB use does not decrease...

Robert F. Linfield and Martin Nesenbergs, “Access Area Switching and Signaling: Concepts, Issues, and Alternatives,” Technical Report NTIA TR-78-2, May 1978

This report covers two key tasks of the Access Area Digital Switch (AADSS) program being conducted by NTIA/ITS for the U.S. Army Communications Systems Agency. First, a brief introduction to digital electronic private automatic branch exchanges (PAB...

Judd A. Payne, “ARPANET Host to Host Access and Disengagement Measurements,” Technical Report NTIA TR-78-3, May 1978

A set of telecommunications performance parameters have been developed for proposed Federal Standard 1033. The measurement of five of these parameters, access time, incorrect access time, access denial probability, disengagement time and disengagemen...

Neal B. Seitz and Peter M. McManamon, “Digital Communication Performance Parameters for Proposed Federal Standard 1033, Volume I: Standard Parameters,” Technical Report NTIA TR-78-4-1, May 1978

There is a growing need within the Federal Government for uniform means of specifying and measuring the performance of data communication systems from the point of view of the digital services delivered to the end user. This report presents results o...

F. George Kimmett and Neal B. Seitz, “Digital Communication Performance Parameters for Proposed Federal Standard 1033, Volume II: Application examples,” Technical Report NTIA TR-78-4-2, May 1978

This volume presents three examples of the use of proposed Federal Standard 1033, "Digital Communication Performance Parameters," in specifying end-to-end telecommunication system performance. The examples illustrate, for the particular configuration...

Institute for Telecommunication Sciences, “RSMS Measurements Report: Measurement of Federal Radio Channel Usage in Norfolk, Virginia, 406–420 MHz Band,” Measurement Report, April 1978

These data provide the results of measurements made in April 1978 to determine the usage of Federal radio channels in the 406–420 MHz band at Norfolk, Virginia. These measurements were conducted as part of the National Telecommunications and Informa...

Institute for Telecommunication Sciences, “RSMS Measurements Report: Measurement of Federal Radio Channel Usage in Norfolk, Virginia, 30–50 MHz Band,” Measurement Report, April 1978

These data provide the results of measurements made in April 1978 to determine the usage of Federal radio channels in the 30–50 MHz band at Norfolk, Virginia. These measurements were conducted as part of the National Telecommunications and Informati...

Anita G. Longley, “Radio Propagation in Urban Areas,” Technical Report NTIA OT-78-144, April 1978

This report reviews much of the earlier work on radio propagation in urban areas, including a good deal of data from measurement programs, careful studies of multipath propagation, and techniques to reduce multipath fading. A number of investigators ...

Institute for Telecommunication Sciences, “RSMS Measurements Report: Measurement of Federal Radio Channel Usage in Norfolk, Virginia, 225–400 MHz Band,” Measurement Report, March 1978

These data provide the results of measurements made in March 1978 to determine the usage of Federal radio channels in the 225–400 MHz band at Norfolk, Virginia. These measurements were conducted as part of the National Telecommunications and Informa...

Institute for Telecommunication Sciences, “RSMS Measurements Report: Measurement of Federal Radio Channel Usage in Norfolk, Virginia, 162–174 MHz Band,” Measurement Report, March 1978

These data provide the results of measurements made in March 1978 to determine the usage of Federal radio channels in the 162–174 MHz band at Norfolk, Virginia. These measurements were conducted as part of the National Telecommunications and Informa...

Institute for Telecommunication Sciences, “RSMS Measurements Report: Measurement of Federal Radio Channel Usage in Norfolk, Virginia, 138–150 MHz Band,” Measurement Report, March 1978

These data provide the results of measurements made in March 1978 to determine the usage of Federal radio channels in the 138–150 MHz band at Norfolk, Virginia. These measurements were conducted as part of the National Telecommunications and Informa...