Search Results

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

Robert W. Hubbard, “Digital Microwave Transmission Tests at the Pacific Missile Test Center, Pt. Mugu, California,” Technical Report NTIA TR-83-126, June 1983

This report describes an experiment designed to measure the performance of digital microwave radio systems in a line-of-sight (LOS) link that is subject to strong atmospheric multipath. It outlines the measurements made to characterize the propagatio...

D. M. Cerni and E. M. Gray, “International Telecommunications Standards: Issues and Implications for the ’80’s – A Summary Record of a July 1982 Workshop,” Special Publication NTIA SP-83-15, May 1983

International telecommunication standards and their effects on the U.S. telecommunication industry were considered at a 2-day workshop entitled “International Standards -- Issues and Implications for the ’80’s.” This report summarizes the 30 papers ...

Joseph A. Hull, A. Glenn Hanson, and L. R. Bloom, “Alternative Transmission Media for Third-Generation Interface Standards,” Technical Report NTIA TR-83-121, May 1983

A review of EIA and CCITT data interface standards identifies three generations namely: first (1960's), second (1970's), and third (1980s and beyond). The User/Network physical interference for the pending Integrated Services Digital Network is an ex...

Kenneth C. Allen, Hans J. Liebe, and Charles M. Rush, “Estimates of Millimeter Wave Attenuation for 18 United States Cities,” Technical Report NTIA TR-83-119, May 1983

Attenuation by the atmosphere can severely limit the use of the radio spectrum above 10 GHz for telecommunication purposes. In this report brief discussions of three mechanisms that attenuate millimeter waves in the atmosphere are presented: rain att...

David Middleton and Arthur D. Spaulding, “Optimum Reception in Non-Gaussian Electromagnetic Interference Environments: II. Optimum and Suboptimum Threshold Signal Detection in Class A and B Noise,” Technical Report NTIA TR-83-120, May 1983

In this second part of an ongoing study, the general problem of optimum and suboptimum detection of threshold (i.e. weak) signals in highly nongaussian interference environments is further, developed from earlier work ([la],[lb];[34]). Both signal pr...

James A. Hoffmeyer, “Interoperability of the European Defense Communications System with Tri-Service Tactical Communications,” Technical Report NTIA TR-83-123, May 1983

This report discusses the different types of interoperability requirements, summarizes several related research and development projects, and presents alternatives for aachieving interoperability between the Defense Communications System and the TRI-...

Lewis E. Vogler, “Further Investigations of the Multiple Knife-Edge Attenuation Function,” Technical Report NTIA TR-83-124, May 1983

The multiple knife-edge (MKE) attenuation function is derived from Fresnel-Kirchhoff theory and compared with the original derivation from Furutsu’s generalized residue series. It is shown that the two methods give complex attenuations with the same ...

Robert L. Hinkle, “Background Study on Efficient Use of the 2700–2900 MHz Band,” Technical Report NTIA TR-83-117, April 1983

In early 1980, NTIA, through the Interdepartment Radio Advisory Committee (IRAC) Spectrum Planning Subcommittee (SPS), became cognizant of several new major radar systems being developed by Government agencies in the 2700–2900 MHz band. In light of t...

M. Barmat, “Price of international satellite service: COMSAT vs INTELSAT,” Technical Report NTIA TR-83-122, April 1983

Price of international satellite service: COMSAT vs INTELSAT, April 1983

Edmond J. Violette, L. Roger Espeland, Kenneth C. Allen, and F. Schwering, “Urban Millimeter Wave Propagation Studies,” Contractor Report NTIA CECOM 83-3, April 1983

Measurements of millimeter wave propagation in urban areas at 9.6, 28.8 and 57.6 GHz, and a determination of signal levels reflected from several building surfaces, were made to study wave propagation characteristics in a city environment. Principal...

Martin Nesenbergs and Peter M. McManamon, “An Introduction to the Technology of Intra– and Interexchange Area Telephone Networks,” Technical Report NTIA TR-83-118, March 1983

This report presents an overview of the 1982 telephone network technology. Many physical facilities constitute the public switched telephone network. Their respective roles in support of voice services and related traffic are reviewed. Essential inte...

Eldon J. Haakinson, “Meteor Burst Communications Model,” Technical Report NTIA TR-83-116, February 1983

The meteor burst communications model is a user-interactive computer model that predicts the reliability of a communications system that uses meteor bursts as the communications channel. The model predicts the waiting times required to complete the t...

David Middleton, “Threshold Signal Reception in Electromagnetic Interference Environments: Part 2, Receiver Structures and Performance for Class A EMI Environments and Scenarios,” Contractor Report NTIA CR-82-17, January 1983

David Middleton, “Threshold Signal Reception in Electromagnetic Interference Environments: Part 4, An Initial Conceptual Study of Signal Design Against Nongaussian Interference,” Contractor Report NTIA CR-83-22, January 1983

William B. Grant, John C. Carroll, and Charles J. Chilton, “Spectrum Resource Assessment in the 5650–5925 MHz Band,” Technical Report NTIA TR-83-115, January 1983

This report is a spectrum resource assessment of the 5650–5925 MHz band. Included within is information on rules and regulations, allocations, technical standards, frequency assignments, system characteristics, and applicable compatibility analysis.

David Middleton, “Threshold Signal Reception in Electromagnetic Interference Environments: Part 3, An Introduction to Canonical Threshold Signal and Parameter Estimation,” Contractor Report NTIA CR-83-21, January 1983

Institute for Telecommunication Sciences, “FY 1982 Technical Progress Report,” Technical Progress Report, January 1983

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...

Clark C. Watterson, “HF Channel-Simulator Measurements on the KY-879P FSK Burst-Communication Modem-Set 2,” Contractor Report NTIA CR-82-20, December 1982

D. A. Hill, “HF Ground Wave Propagation Over Forested and Built-up Terrain,” Technical Report NTIA TR-82-114, December 1982

An integral equation method is presented for computing the vertically polarized field strength over irregular terrain which is covered with forest, buildings, or snow. The terrain cover is modeled as an equivalent slab, and a general computer code, W...

Lewis E. Vogler, “Comparisons of Observed Propagation Loss with Predictions from Multiple Knife-Edge Attenuation,” Technical Report NTIA TR-82-108, November 1982

Comparisons of theoretical attenuation based on multiple knifeedge diffraction with measured values of median propagation loss are presented for a number of different propagation paths. In general the knife-edge predictions tend to overestimate recei...