Copies of these reports are available thru the NTIA Spectrum Engineering and Analysis Division, phone number (202)482-2608, fax number (202)482-4595, or e-mail edrocella@ntia.doc.gov
NTIA# TM-85-109 NTIS# IRAC# SECURITY=U February 1985 Mayher, Robert J. Evaluation of Computer-Aided Spectrum Management Lady, John K. in Papua New Guinea Winkler, Carl A. _______________________________________________________________________ NTIA# TM-85-111 NTIS# IRAC# SECURITY=U April 1985 Mayher, Robert J. Evaluation of Computer-Aided Spectrum Management Lady, John K. in Venezuela _______________________________________________________________________ NTIA# TR-84-168 NTIS# IRAC# SECURITY=U February 1985 Cohen, David J. Necessary Bandwidth and Spectral Properties of Digital Modulation _______________________________________________________________________ NTIA# TR-85-175 NTIS# PB 85-225076 IRAC# SECURITY=U April 1985 FREQUENCY RANGE (MHz)= 0.1605 0.2000 Grant, W.B. Spectrum Resource Assessment of the 1605-2000 kHz Thompson, R.E. Band Carroll, J.C. _______________________________________________________________________ NTIA# TR-85-178 NTIS# IRAC# SECURITY=U September 1985 FREQUENCY RANGE (MHz)= 0.0525 0.1615 Grant, W.B. An Assessment of the Future of Travelers' Thompson, R.E. Information Stations _______________________________________________________________________ NTIA# TR-85-179 NTIS# IRAC# 24691 SECURITY=U February 1985 FREQUENCY RANGE (MHz)= 947.0000 17000.0000 Chilton, C.J. Spectrum Resource Assessment of the 947-17000 Nebbia, K. Band, Part II Grant, W.B. _______________________________________________________________________ NTIA# TR-85-180 NTIS# PB 86-127313 IRAC# SECURITY=U September 1985 Schroeder, N. Spectrum Resource Assessment of Unlicensed Nebbia, K. Electronic Devices _______________________________________________________________________ NTIA# TR-85-181 NTIS# IRAC# 24779 SECURITY=U September 1985 FREQUENCY RANGE (MHz)= 1.5000 1.9000 Farrar, Andrew Evaluation Techniques -- Fixed Service Systems to Dobson, Herb Power-Line-Carrier Circuits Wentland, Fred _______________________________________________________________________ NTIA# TR-85-183 NTIS# IRAC# SECURITY=U November 1985 Akima, Hiroshi Technical Basis for the Geostationary Satellite Orbit Analysis Program (GSOAP) _______________________________________________________________________ NTIA# TM-86-115 NTIS# IRAC# SECURITY=U September 1986 FREQUENCY RANGE (MHz)= 7000.0000 8000.0000 Berry, Leslie Application of the Technical Spectrum Efficiency Chang, Eugene Factor (TSEF) to the Fixed Service Three Frequency Frazier, William E. Bands et al. The Technical Spectrum Efficiency Factor (TSEF) concept was developed in the Technical Subcommittee (TSC) of the Interdepartment Radio Advisory Committee (IRAC) and was applied, by NTIA, to government fixed telecommunications systems in the 7-8 GHz bands. Both computer automated and manual procedures were employed. The TSEF evaluates the technical spectrum efficiency of a spectrum-using system by comparing the amount of the spectrum it uses to that used by the most spectrum-efficient system that could be procured to accomplish the same mission. The "most spectrum-efficient" system is called "the reference system". An extensive catalog of spectrum conservation techniques is also included. _______________________________________________________________________ NTIA# TM-86-117 NTIS# IRAC# SECURITY=U November 1986 FREQUENCY RANGE (MHz)= 9300.0000 9320.0000 Nebbia, Karl B. The Effect of Shipborne Radars on the Aeronautical Radionavigation Service in the 9300-9320 MHz Band The possibility of allowing shipborne navigation radars within the 9300-9320 MHz band is being considered within Study Group 8 of the International Radio Consultative Committee (CCIR) and within the United States preparation for the 1987 Mobile World Administrative Radio Conference. The impact this would have upon beacon systems used within the aeronautical radionavigation service is of concern. The report provides the background, equipment characteristics, and an analysis of the potential interaction between the shipborne radars and the aeronautical beacon systems. _______________________________________________________________________ NTIA# TR-86-198 NTIS# IRAC# SECURITY=U August 1986 Filippi, Cesar Baseband Performance Degradation due to Interference in the Fixed-Satellite Service This report describes a set of algorithms developed at NTIA for the analytic assessment of interference effects in satellite communication services. These algorithms convert the interference levels at the receiver input into an observable performance degradation of the receiver output, such as, bit errors or distortion of the voice output. _______________________________________________________________________ NTIA# TR-86-199 NTIS# IRAC# SECURITY=U August 1986 FREQUENCY RANGE (MHz)= 2000.0000 2000.0000 Farrar, Andrew Calculation of Power-Flux Density Levels in the 2 GHz Band, Phase Three This report, a follow-on of two earlier reports, examined the impact on fixed and mobile services of relaxing the current power-flux-density limits from satellites in the region of 2 GHz. The results of these studies were used to support U.S. contributions into the International Radio Consultative Committee (CCIR). _______________________________________________________________________ NTIA# TM-87-121 NTIS# IRAC# SECURITY=U February 1987 Speights, W.D. Application of Trunking to Government Land-Mobile Communications Before 1987 no commercial trunking systems were available in any Govenment or non Government band below 800 MHz. This study examined the application of trunking to the Government band 406-420 MHz. As a result of this study and subsequent discussions with industry, commercial trunking systems were developed for the Government. _______________________________________________________________________ NTIA# TM-87-122 NTIS# IRAC# SECURITY=U June 1987 Crandall, G.A., III Assessment of Digital Radio Voice Protection for Government Land-Mobile Use This report documents an effort to measure the operational and performance characteristics of radios equipped with the Data Encryption Standard (DES), as applied to government land-mobile operations. The purpose of these tests was to compare selected operational and performance characteristics of the digital (or guarded) mode of operation with those of the analog (or clear) mode of operation for each radio under test. The measurement results are discussed relative to spectrum management issues involving the use of spectrum allocated to the Federal Government fixed and mobile services and the corresponding rules of use. This measurement effort is the first phase of an on-going program to investigate the effect of using digital modulation schemes in a predominantly analog land-mobile environment. _______________________________________________________________________ NTIA# TM-87-123 NTIS# IRAC# SECURITY=U August 1987 Speights, W.D. NTIA Task Force Measurement Report: Naval Air Test Center, Patuxent River, MD This report documents the results of a special measurement task at the Naval Air Test Center, Patuxent River, Maryland. In documenting the spectrum usage for land mobile, radar and microwave systems at an active military base, the report serves as a reference for future improvements to spectrum management techniques and procedures. _______________________________________________________________________ NTIA# TM-87-125 NTIS# IRAC# SECURITY=U July 1987 FREQUENCY RANGE (MHz)= 4500.0000 4800.0000 Haines, Robin Effects of Planning of the Fixed-Satellite Service on the Fixed and Mobile Services in the 4500-4800 MHz Band This report is a study of the potential for sharing in the 4500-4800 MHz band between the fixed-satellite service (FSS) and terrestrial (fixed and mobile) services. The report focuses on decisions of the WARC-ORB-85 concerning planning of the FSS in this band. The report concludes that sharing of the 4500-4800 MHz band by the fixed, mobile and fixed satellite services will continue to be feasible. _______________________________________________________________________ NTIA# TM-87-127 NTIS# IRAC# SECURITY=U September 1987 FREQUENCY RANGE (MHz)= 400.0000 AND ABOVE Nebbia, Karl B. Spectrum Resource Assessment of the Federal Long, Kenwyn Government Fixed Service (Bands above 400 MHz) Sussman, Merton This report documents a spectrum resource assessment of the bands allocated to the Federal Government fixed service above 400 MHz on a primary basis. The assessment identifies allocations, standards, channeling plans and technological trends pertaining to the Federal fixed service. Technical and policy issues are discussed as part of NTIA's long-range planning effort. _______________________________________________________________________ NTIA# TM-87-129 NTIS# IRAC# SECURITY=U September 1987 Farrar, Andrew Procedures for Calculating Field Intensities of Chang, Eugene Antennas This report discusses simplified procedures for calculating near and far field intensities of several types of aperture and wire antennas. The antenna technical characteristics listed in the Government Master File (GMF) were found to be sufficiently representative of the majority of antenna types listed in the GMF. Existing analytical antenna models developed for a near field analysis of the antennas were identified. Some of these models were used to develop a simplified model for estimating near field radiation from Government radiocommunications systems. _______________________________________________________________________ NTIA# TM-87-131 NTIS# IRAC# SECURITY=U October 1987 Mayher, Robert J. Evaluation of Computer-Aided Spectrum Management Lady, John K. in Thailand Matheson, Robert J. et al. _______________________________________________________________________ NTIA# TM-88-133 NTIS# IRAC# 25947 SECURITY=U September 1988 FREQUENCY RANGE (MHz)= 000.0900 000.1100 Nebbia, Karl B. Assessment of Potential Interference from Power- Line-Carrier Systems to LORAN-C Aeronautical Receivers This report is an analysis of the potential for interference from power-line-carrier (PLC) systems to LORAN-C aeronautical receivers. Data from existing measurements is compiled and used to determine, under a worst-case scenario, the flight altitude where interference from PLC transmissions could be experienced. Frequency separation and restriction of PLC transmission duration are identified as two useful means of preventing interference. _______________________________________________________________________ NTIA# TM-88-134 NTIS# IRAC# SECURITY=U September 1988 FREQUENCY RANGE (MHz)= 2200-2290 Farrar, Andrew Coordination Requirements for Space and Aeronautical Telemetry Systems (2200-2290 MHz) This report documents an analysis of the probability of interference from systems in the space services to aeronautical telemetry system using the 2200-2290 MHz band. These calculated results may be used to determine the coordination requirements for compatible operation between these systems, if a relaxation in the power flux density limits is adopted. _______________________________________________________________________ NTIA# TM-88-135 NTIS# IRAC# SECURITY=U September 1988 Kobayashi,Herbert K. Procedures for Calculating Field Intensities of Antennas: Phase II This report supplements an earlier report (TM-87-129) for calculating the near-field power density of commonly encountered linear and aperture antennas. These calculations are useful for determining the distance separation required to avoid radiation hazard levels. _______________________________________________________________________ NTIA# TM-88-136 NTIS# IRAC# 26039 SECURITY=U September 1988 Haines, Robin H. Spectrum Resource Assessment of Selected U.S. Government Space Services This report describes the use of space services by the U.S. Government in support of NTIA's Long Range Plan for Management and Use of the Radio Spectrum. The report addresses national and international regulations as well as frequency allocations, current and future government use of the space services, and spectrum management issues. _______________________________________________________________________ NTIA# TM-88-137 NTIS# IRAC# SECURITY=U September 1988 FREQUENCY RANGE (MHz)= 162.0000 174.0000 Speights, William D. Assessment of Digital Radio Voice Protection for Government Land-Mobile Use: Phase II This study examined the sharing of spectrum between analog and digital land mobile radios in the 162-174 MHz band. Recommendations regarding cochannel and adjacent channel coordination distances have been adopted. _______________________________________________________________________ NTIA# TR-88-236 NTIS# IRAC# SECURITY=U August 1988 Mayher, Robert J. The SUM Data Base: A New Measure of Spectrum Haines, Robin H. Use Litts, Steven E. et al. This report describes a new technique for calculating the spectrum space used by existing frequency assignments. The Spectrum Use Measure (SUM) model determines the amount of spectrum used at a given location or the probability that a given location is unavailable for a new assignment. These quantities, stored in a SUM data base, can be used to produce maps, histograms and indices of spectrum use. The SUM technique has been effectively applied to the 1710-1850 MHz and the 7750-7900 MHz bands. The report concludes that the SUM technique is an effective indicator of spectrum use and recommends that it should be used when evaluating service bands. _______________________________________________________________________ NTIA# SP-89-22 NTIS# IRAC# SECURITY=U June 1989 Long Range Plan for Management and Use of the Radio Spectrum by Agencies and Establishments of the Federal Government _______________________________________________________________________ NTIA# TM-89-139 NTIS# IRAC# SECURITY=U March 1989 Filippi, Cesar A. Single and Aggregate Emission Level Models for Litts, Steven Interference Analysis Clarke, Mary Jo Gruendl, Robert This report describes analysis models and software packages developed for the assessment of single-entry and aggregate interference from terrestrial emitters into terrestrial or airborne victim receivers. The menu-drive computer programs provide user options for input/output computations, parametric representations, propagations models and emitter distributions. The flexibility in the scenario creation, parameter selection, and computation mode, renders the models applicable to a wide variety of EMC assessments and conditions. Model descriptions, technical formulations, user manuals, and sample runs are provided in this report. _______________________________________________________________________ NTIA# TM-89-141 NTIS# IRAC# 25681 SECURITY=U June 1989 FREQUENCY RANGE (MHz)= 3.0000 30.0000 Grant, W.B. Spectrum Resource Assessment of Government Use of Thompson, R.E. the HF (3-30 MHz) Band Haydon, G.W. et al. This report is a spectrum resource assessment of the HF band (3-30 MHz). It incudes information on rules, regulations, allocations, technical standards, frequency assignments, system characteristics, and special uses unique to the HF band. The impact on HF services brought about by new technologies is discussed along with potential impacts of HF Over-the-Horizon (OTH) radars and ionospheric sounders. The importance of domestic emergency communciations in the HF band is discussed along with new standards for interoperability presently being drafted. _______________________________________________________________________ NTIA# TR-89-241 NTIS# IRAC# 26410 SECURITY=U March 1989 FREQUENCY RANGE (MHz)= 30.0000 100.0000 Cohen, David Meteor Burst System Communications Capability Grant, William Steele, Francis The technical and operating characteristics of meteor burst systems of importance for spectrum management applciations are identified. A technical assessment is included which identifies the most appropriate frequency subbands within the VHF spectrum to support meteor burst systems. The electromagnetic compatibility of meteor burst systems with other equipments in the VHF spectrum is determined using computerized analysis methods for both ionospheric and groundwave propagation modes. It is shown that meteor burst equipments can cause and are susceptible to groundwave interference from other VHF equipments. The report includes tables of geographical distance separations between meteor burst and other VHF equipments which satisfy interference threshold criteria. _______________________________________________________________________ NTIA# TR-89-242 NTIS# IRAC# SECURITY=U April 1989 FREQUENCY RANGE (MHz)= 100.0000 200000.0000 Frazier, William E. Handbook of Radio Wave Propagation Loss, Part II (100-20,000 MHz) This handbook is intended to provide estimates of radio wave propagation loss between transmitting and receiving antennas of various heights and transmission frequencies above the assumed smooth-earth surface calculated using the NLAMBDA computer model. For many cases involving electromagnetic compatibility analysis, the curves of predicted transmission losses in this report may be used to estimate the transmission losses of the desired and undesired signals. These estimated loss values are given in dB as BASIC MEDIAN TRANSMISSION LOSS for antennas with effective heights up to 5000 meters, operating in the 100-20,000 MHz frequency range, over land or sea, at great circle earth surface distances up to 1000 kilometers. _______________________________________________________________________ NTIA# TR-89-243 NTIS# IRAC# 26278 SECURITY=U May 1989 FREQUENCY RANGE (MHz)= 7125.0000 8500.0000 Hinkle, Robert L. Spectrum-Conservation Techniques for Fixed Farrar, Andrew Microwave Systems Since the spectrum is a limited natural resource, the spectrum management community has a major interest in identifying spectrum conservation techniques that will provide more efficient spectrum utilization. Advances in new technology for fixed microwave systems in antennas, modulation schemes and signal processing techniques offer increased efficiency in spectrum utilization. This report analyzes the spectrum conserving properties of the various new technologies for fixed microwave systems applying the concepts in CCIR Report 662-2, and was defined as the spectrum conservation factor (SCF). The report concludes that the SCF technique is an effective indicator of the spectrum conserving properties of technologies which can be used to develop new spectrum standards. _______________________________________________________________________ NTIA# TR-89-248 NTIS# IRAC# SECURITY=U September 1989 FREQUENCY RANGE (MHz)= 406.1000 420.0000 Haines, Robin H. The SUM Land Mobile Model: Application of the Litts, Steven E. Spectrum Use Measure to the Land Mobile Service The Spectrum Use Measure (SUM) technique quantifies and graphically depicts the amount of spectrum resources used in a region within a frequency band. The SUM technique was originally developed to calculate spectrum use for a fixed system. The report describes the extension of the SUM model to calcualte spectrum use for land mobile systems and the application of the land mobile model to the 406.1-420 MHz frequency band. An enhancement to the model that greatly reduces the run time is also discussed. The report concludes that the SUM concepts are applicable to land mobile systems and recommends extension of the model to additional services and frequency bands.