Search Results
The search returned 1,237 publication(s) on its.ntia.gov.
The report briefly summarizes the status of four technologies: direct satellite communications, land mobile radio, broadband communications networks, and fiber optic communications. It considers the problems that appear to be hindering the growth of...
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 ...
On March 2, 3, and 4, 1976, the Institute for Telecommunication Sciences of the Office of Telecommunications, U. S. Department of Commerce, sponsored a conference on "The Use of Millimeter Waves for Communications." The purpose of the meeting was to...
A series of experimental measurements are described that examine the performance of the five different digital modems in Gaussian noise and additive interference. These experimental results are then compared with theoretical predictions to determine...
Some basic concepts, design criteria, and hardware implementations are reviewed for measuring the impulse responses which characterize radio transmission channels. A channel sounder which is presently being used by the Institute for Telecommunicatio...
This report contains a description of the Fixed Radar Spectrum Utilization Model. This model is automated and can be used to obtain: (1) a measure of spectrum crowding in a specific geographic area and radar frequency band, (2) a list of preferable ...
This report summarizes the results of a number of studies of path-to-path, or location, variability of transmission loss at 20 MHz to 10 GHz. The studies show that such variability appears to be normally distributed and can, therefore, be represente...
This report describes and illustrates the method, instrumentation and applications of a probing technique for measuring fundamental characteristics of a radio model transmission channel. The method is based upon a convolutional model of the channel,...
Most man-made and natural electromagnetic interferences are highly non-gaussian random processes, whose degrading effects on system performance can be severe, particularly on most conventional systems, which are designed for optimal or near optimal ...
This report describes an initial computer program that produces statistical frequency-distance curves. The computer program has been developed as a tool for use by the frequency managers' community of OTP/IRAC. The statistical frequency-distance curv...
The bibliography is a reference guide that cites and annotates over 400 articles on various aspects of telecommunications. Articles are relevant to U.S. policy in communications, and range from specific technologies and systems worldwide, to economi...
An approximate method for estimating the performance of digital systems operating with co-channel interference and Gaussian additive noise is described. The method uses Monte-Carlo techniques and an approximation, based on the geometrical characteri...
These user reaction tests involved voice telephone communications that were relayed one, two, or three times through the Westar satellite. The types of connections for the voice transmissions involved Common Control Switching Arrangements
The purpose of the paper is to explore the nature of the problem and to suggest some measures which might help to restore the U.S. effectiveness in the International Telecommunication Union (ITU), the oldest of the world’s international organization...
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 ...
This report documents the latest version of the three-dimensional ray tracing program originally described in “A Three-Dimensional Ray Tracing Computer Program,” by R. M. Jones, ESSA Technical Report IER 17 - ITSA 17, and later modified in “Modifica...
The data from a large measurement program at VHF and UHF are carefully evaluated , summarized and compared with values predicted from models of radio propagation over irregular terrain. Particular problems of low antennas and the effects of vegetati...
A theoretical expression for the received signal by a radar is reduced to a utilitarian form by the introduction of feasible approximations and assumptions, with concern expressed for the need for evaluation of errors caused by these approximation...