Search Results

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

James S. Washburn, Charles M. Rush, and Frank G. Stewart, “Development of Techniques to Assess Interference to the MF Broadcasting Services,” Technical Report NTIA TR-82-90, January 1982

The Institute for Telecommunication Sciences has embarked upon a program to improve the techniques that are used to determine medium frequency broadcasting parameters. This work is motivated by the fact that increased transmitter power which is plann...

Robert J. Matheson, John D. Smilley, Glenn D. Falcon, and Vincent S. Lawrence, “Output Tube Emission Characteristics of Operational Radars,” Technical Report NTIA TR-82-92, January 1982

During the past several years, the Radio Spectrum Measurement System (RSMS) of the National Telecommunications and Information Administration (NTIA) has measured the emission spectra and other characteristics of many radars operating in the governmen...

Charles M. Rush, Margo PoKempner, D. N. Anderson, and Frank G. Stewart, “The Use of Theoretical Models to Improve Global Maps of foF2,” Technical Report NTIA TR-82-93, January 1982

In this report, the results of a study to improve the global maps of monthly median values of the F2 region critical frequency, foF2, using values determined from a theoretical model, are presented. The object of the study was to obtain values of the...

Charles M. Rush et al., “A Simplified Model of the High Latitude Ionosphere for Telecommunications Applications,” Technical Report NTIA TR-82-94, January 1982

A model of the parameters that specify the structure of the electron density in the polar ionosphere has been developed. The model is based upon the modification of monthly median ionospheric parameters given by the CCIR by use of formulations that c...

Science Information Services, Inc., “Biological Effects of Nonionizing Electromagnetic Radiation: A Digest of Current Literature July through September 1981 (Volume VI, Number 1),” Contractor Report NTIA CR-81-15, December 1981

Biological Effects of Nonionizing Electromagnetic Radiation is a publication researched and prepared by the Franklin Research Center, Science Information Services Organization, under contract with the U.S. Navy and administered by the National Telec...

Evan J. Dutton, Duane C. Hyovalti, C. E. Lewis, and Francis K. Steele, “Elevated Duct Data-Base Improvement,” Technical Report NTIA TR-81-89, December 1981

Elevated Duct Data-Base Improvement, Dec. 1981

Joseph A. Hull, “Fiber Optic Communications – An Update,” Special Publication NTIA SP-81-14, October 1981

Harold T. Dougherty, “Electromagnetic Wave Trajectories at VHF and Higher Frequencies,” Contractor Report NTIA CR-81-14, October 1981

Lewis E. Vogler, “The Attenuation of Electromagnetic Waves by Multiple Knife-Edge Diffraction,” Technical Report NTIA TR-81-86, October 1981

Starting from work by Furutsu, a multiple knife-edge attenuation function is derived. A series representation of the function is developed which is amenable to computer implementation. Comparisons of computer-generated numerical values with known res...

David Middleton and Arthur D. Spaulding, “Signals and Interference in FM Reception: I. Deterministic Models-The "Instantaneous" Approach, with Undistorted Inputs,” Technical Report NTIA TR-81-87, October 1981

The purposes of this study (and subsequent efforts) are several: (1), to extend earlier models of the FM reception process, to include as much II "realism" – i.e., non-ideality of both the linear and nonlinear elements of the typical FM receiver – as...

Hiroshi Akima, “A Method for Determining the Minimum Elliptical Beam of a Satellite Antenna,” Technical Report NTIA TR-81-88, October 1981

The 1977 World Administrative Radio Conference for the Planning of the Broadcasting-Satellite Service decided that elliptical antenna beams should be used for satellite antennas for planning purposes. Since it is desirable to minimize the antenna bea...

“Proceedings: State Regulatory Issues for the ‘80s in Common Carrier Telecommunications,” Special Publication NTIA SP-81-13, September 1981

R. T. Watson, “Spectrum resource assessment in the 2300–2450 MHz band,” Technical Report NTIA TR-81-78, September 1981

Spectrum resource assessment in the 2300–2450 MHz band, Sep. 1981

Francis P. Flynn, “Spectrum resource assessment in the 1660-1710 MHz band,” Technical Report NTIA TR-81-80, September 1981

Spectrum resource assessment in the 1660-1710 MHz band, Sep. 1981

John E. Hershey, “The Discrete Logarithm Public Cryptographic System,” Technical Report NTIA TR-81-81, September 1981

The report is a study and primer of the discrete logarithm public key cryptographic system. Implementation and strengths and weaknesses are discussed.

H. J. Ng, “Spectrum resource assessment in the 4400-4990 MHz band,” Technical Report NTIA TR-81-82, September 1981

Spectrum resource assessment in the 4400-4990 MHz band, Sep. 1981

Andrew Farrar, “Spectrum resource assessment in the 1215-1400 MHz band,” Technical Report NTIA TR-81-83, September 1981

Spectrum resource assessment in the 1215-1400 MHz band, Sep. 1981

Laurance G. Hause, “Selective Fading on a Long 8 GHz Line-of-Sight Path in Europe,” Technical Report NTIA TR-81-84, September 1981

This report presents the description, analysis and results of a set of measurements made on a 90 km line-of-sight path in Italy. The measurements were made during the late spring of 1980 by the National Telecommunications and Information Administrati...

Fredrick Matos, “Spectrum Resource Assessment in the 216-225 MHz Band,” Technical Report NTIA TR-81-85, September 1981

Spectrum Resource Assessment in the 216-225 MHz Band, Sep. 1981

Eldon J. Haakinson, “Proposed Techniques for Adding FM Broadcast Stations in a Major Market,” Conference Paper, August 1981

An investigation of the FM Broadcast Spectrum's utilization shows that more assignments are possible if some or all of the following recommendations are adopted: protections to existing facilities rather than to maximum facilities is granted the...