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.