NOTE: These reports are available either on-line in PDF (portable document) format or only as hard-copy. Software to read those documents in the PDF format are available from a variety of sources. Neither NTIA nor the Office of Spectrum Management endorse any PDF reading software.
If you would like a copy of a report that is not available electronically, please make note of the document number and submit your request to:
JSC-CR-10-004
May 2010
|
This handbook provides the radio frequency (RF) analyst with the capability to calculate the effects of noise and interference on RF communications
receivers. A receiver is modeled as a sequence of modules. Each module has a transfer function that relates the module outputs to the module
inputs. By consecutively analyzing each module in the sequence, the analyst can then relate the receiver outputs (performance) to the receiver
inputs (signal characteristics).
A wide variety of communications modulation and coding techniques are considered for this handbook including Quadrature Phase Shift Keying
(QPSK), Gaussian Minimum Shift Keying (GMSK), Orthogonal Frequency Division Multiplexing (OFDM), Low Density Parity Check Coding (LDPCC)
and Turbo Product Coding (TPC). Interferers considered include continuous and pulsed narrow and broadband interferers which are on-tune, offtune
and adjacent channel. [PDF] |
TM 10-464
Dec 2009 |
Correction Factors and Measurement Procedure to Assess the Interference Impact of Linear Swept Frequency Signals on Radio Receivers
This technical memorandum provides a methodology to determine the average and peak power level at the output of a filter with a linear swept frequency pulse train input to the filter. Using this method, peak and average power correction factors were developed that can be used compute the interference power level of a system that employs linear swept frequency signals. [PDF] [Word]
|
TM 09-461
May 2009 |
Description of a model to compute the aggregate interference from radio local area networks employing dynamic frequency selection to radars operating in the 5 GHZ frequency range.
This technical memorandum documents the analysis methodology that NTIA developed and used in assessing interference from radio local area networks to 5 GHz radar systems. [PDF] [Word] |
TR 08-451
Dec 2007 |
Assessment of Alternative Future Federal Land <Mobile Radio Systems
This report evaluates the efficiency of federal spectrum use, performing a study that compares the spectrum resources used by several alternative land mobile radio (LMR) system architectures employing trunked radio technology to the spectrum resources used by the current conventional LMR systems. This study considered the 162-174 MHz federal LMR band in the Washington, D.C. area. The Washington, D.C. area was selected because it represents a spectrally congested environment and the 162-174 MHz band because it represents the most heavily used federal land mobile frequency band.
[PDF] [Word]
|
NTIA 08-450
Oct 2007 |
Potential Interference From Broadband Over Power Line (BPL] Systems To Federal Government Radiocommunication Systems at 1.7 - 80 MHz
Phase 2 Study
• Complete Report [PDF]
• Volume
I - Technical Report [PDF]
• Volume
II - Technical Appendices [PDF]
• NEC
input: Power Line Models (Table 2-1) [PDF]
• NEC
input: Underground Model [PDF]
• NEC
input: Complex Power Line Model [PDF]
|
NTIA 07-447
Oct 2007 |
Assessment of Federal and
Non-Federal Land Mobile Radio Frequency
Assignment Methodologies
[PDF] |
JSC CR-06-072
Nov 2006 |
Communications
Receiver Performance Degradation Handbook [PDF] |
NTIA 06-440
Aug
2006 |
Federal
Land Mobile Operations in the 162-174 MHz Band
in the Washington, D.C., Area
Phase 1: Study of Agency Operations [PDF] |
NTIA 05-432
Oct 2005 |
Interference Protection Criteria: Phase 1 - Compilation from Existing Sources
Technical report
[PDF] |
NTIA 05-427
May 2005 |
WORLD
RADIOCOMMUNICATION CONFERENCES Recommendations for
Improvement in the United States Preparatory Process [HTML] |
NTIA 04-413
April 2004 |
Potential
Interference from Broadband Over Power Line (BPL]
Systems to Federal Government Radiocommunications
at 1.7 - 80 MHz, Phase 1 Study [HTML link to full report] |
NTIA 03-404
Nov 2003 |
Receiver
Spectrum Standards: Phase 1 - Summary of Research
into Existing Standards
[PDF] [Word] |
SP 01-49
Jan 2002 |
Current
and Future Spectrum Use by the Energy, Water, and
Railroad Industries
[PDF] |
SP 01-48
Dec 2001 |
Alternative
Frequencies for Use by Public Safety Systems
[PDF]
|
SP 01-47f
Nov 2001 |
Assessment
of Compatibility Between Ultrawideband Systems
and Global Positioning System Receivers (Report
Addendum) [PDF]
• Companion report
by NTIA's Institute for Telelcommunication Sciences [PDF] |
NTIA 01-46
March 2001 |
The
Potential for Accommodating Third Generation Mobile
Systems: Federal Operations, Relocation Costs, and
Operational Impacts:
Final Report [PDF]
• Department of Defense companion assessment [PDF]
• US
Air Force case study
[PDF]
|
SP 01-45
Feb 2001 |
Assessment
of Compatibility Between Ultrawideband (UWB] Systems
and Global Positioning System (GPS] Receivers
[PDF]
• Companion report
by NTIA's Institute for Telecommunication Sciences
[Link to ITS] |
NTIA 01-44
Jan 2001 |
Assessment
of Electromagnetic Spectrum Reallocation, Response
to Title X of the National Defense Authorization Act
for Fiscal Year 2000 [PDF]
|
NTIA 01-43
Jan 2001 |
Assessment
of Compatibility Between Ultrawideband Devices and
Selected Federal Systems
[PDF]
• Excel
Spreadsheets used in calculations [HTML link]
• Companion report
by NTIA's Institute for Telecommunication Sciences
[Link to ITS]
|
NTIA 01-41
Nov 2000 |
Federal
Operations in the 1755-1850 MHz Band: The Potential
for Accommodating Third Generation Mobile Systems
Interim Report
[PDF]
• Referenced
Department of Defense report [PDF] |
NTIA 00-376
April 2000 |
Electromagnetic
Compatibility Between Marine Automatic Identification
and Public Correspondence Systems in the Maritime
Mobile VHF Band
[PDF] |
TR 00-374
Nov 1999 |
Lower Mississippi
River Ports and Waterways Safety System (PAWSS] RF
Coverage Test Results
[PDF] |
TR 00-373
Dec 1999
|
Measured Occupancy of 5850-5925 MHz and Adjacent 5-GHz Spectrum in the United States
Dedicated short-range communication (DSRC) systems have been proposed for operation at locations across the United States in the 5850- to 5925-MHz band. To establish electromagnetic compatibility between DSRC and other 5-GHz systems, it is necessary to understand current and future occupancy of this spectrum. This report summarizes results of measurements made in 5-GHz spectrum for the Federal Highway Administration (FHWA) of emissions from high-power radars and a fixed satellite service (FSS) earth station. [PDF]
|
NTIA 00-40
May 2000
| Federal
Radar Spectrum Requirements
[PDF] |
TR 99-364
|
Lower Mississippi River
VTS Frequency Survey |
TR 99-363
Oct 1999 |
Evaluation of Marine VHF
Radios: Compliance to IEC Receiver Standards
[PDF] |
TR 99-362
March 1999 |
Evaluation of Marine VHF
Radios: Performance in the Savannah, Ga. and New Orleans,
La. Port Areas
[PDF]
|
NTIA 99-361
Dec 1999 |
Technical
Characteristics of Radiolocation Systems Operating
in the 3.1-3.7 GHz Band and Procedures for Assessing
EMC with Fixed Earth Station Receivers
[PDF] |
NTIA 98-39
Nov 1998 |
Indentification
of Alternate Bands, Response to Title III of The
Balanced Budget Act of 1997 [PDF] |
NTIA 98-37
Nov 1996 |
Reallocation
Impact Study of the 1990-2110 MHz Band, Response
to Title III of The Balanced Budget Act of 1997 [PDF] |
SP 98-36
Feb 1998 |
Spectrum
Reallocation Report, Response to Title III of
The Balanced Budget Act Of 1997
[HTML] |
NTIA 98-35
April 1998 |
Radio
Astronomy Spectrum Planning Options [HTML] |
Sep 1997 |
Summary of Results of Measurements
and Tests Related to RF Interference at Bath, Maine
[PDF] |
TR 97-343
Aug 1997 |
Assessment
of Compatibility Between 25 and 12.5 kHz Channelized
Marine VHF Radios
[HTML] |
TM 97-339
June 1997 |
Assessment
of the Expansion of the Earth Exploration-Satellite
Service in the
8025-8400 MHz Range
[HTML] |
NTIA 96-332
Nov 1996 |
High
Frequency (3-30 MHz] Spectrum Planning Options [HTML] |
Oct 1995 |
Land
Mobile Spectrum Planning Options [HTML] |
TR 97-343
Aug 1997 |
Assessment
of Compatibility Between 25 and 12.5 kHz Channelized
Marine VHF Radios
[HTML] |
NTIA 97-339
June 1997 |
Assessment
of the Expansion of the Earth Exploration-Satellite
Service in the 8025-8400 MHz Range
[HTML] |
TM 97-167
1997 |
The Proposed Revision of Chapter 5 of the Manual of Regulations and Procedures for Federal Radio Frequency Management (Phase 1) report was released in September 1996.
This report addressed problems encountered by the Spectrum Planning Subcommittee of the Interdepartment Radio Advisory Committee and the Systems Review Branch of the Spectrum Engineering and Analysis Division, Office of Spectrum Management, in applying the spectrum standards of Chapter 5 to the NTIA Manual. Proposed revisions to Chapter 5 and a proposed new annex containing measurement methods are contained in the report.
|
NTIA 96-332
Nov 1996 |
High
Frequency (3-30 MHz] Spectrum Planning Options [HTML] |
TR 95-323
1995
|
Measurements to Characterize Aggregate Signal Emissions in the 2400-2500 MHZ
Frequency Range report was released in August 1995. This report provides the results of radio spectrum measurements performed to characterize the aggregate signal emissions present in the 2400-2500 MHZ industrial, scientific, and medical (ISM) band and adjacent frequency bands. The measurements were performed at locations near Denver, Colorado and Los Angeles, California, and included various frequency domain and time domain tests utilizing omni-directional and directive antennas. The information contained in this report can serve as an aid to designers developing equipments to operate in these frequency bands, as well as authorities seeking to enhance compatibility between ISM devices and other radio services. [PDF] |
SP 95-34
Oct 1995 |
Land
Mobile Spectrum Planning Options [HTML] |
SP 95-32
1995 |
The Spectrum Reallocation Final Report (Response to Title VI - Omnibus Budget Reconciliation Act of 1993) report was released in February 1995.
This report identifies radio spectrum currently used by the Federal Government for reallocation to the private sector. It provides an overview of the reallocated bands, indicating the Federal usage, transition timetable, and any needed sharing requirements for each band identified for reallocation, and an overview of reported Federal implementation costs. [HTML]
|
NTIA 94-31 |
US
National Spectrum Requirements: Projections and Trends [HTML] |
1991 |
U.S.
Spectrum Management Policy: Agenda for the Future, a 1991 spectrum policy study [HTML] |
TR 94-313
July 1994 |
Analysis of Electromagnetic Compatibility between Radar Stations and 4 GHz Fixed-Satellite Earth Stations
The susceptibility of 3700– to 4200–MHz fixed–satellite service earth stations to interference from radar signals, and the mechanisms by which such interference can occur, are examined. It is shown that interference can occur even if all currently applicable NTIA and FCC spectrum engineering requirements for radar emissions and earth station receiver systems are satisfied. [PDF]
|
TR 94-311
July 1994 |
A Survey of Relative Spectrum Efficiency of Mobile Voice Communication Systems
This paper provides definitions of spectrum efficiency for general communication systems, then simplifies the definitions so that the spectrum efficiency of several contemporary mobile radio systems can be easily compared. [PDF]
|
TR 94-303-2
March 1994
|
Radio Spectrum Measurements of Individual Microwave Ovens - Volume 2
The Radio Spectrum Measurements of Individual Microwave Ovens report was released in March 1994, consisting of Volumes 1 and 2. This report provides results of radio spectrum measurements of 13 individual microwave ovens performed at the NTIA, Institute for Telecommunication Sciences (ITS). Measurements include emission characteristics and time waveforms covering the frequency range 2300-2600 MHZ and oven emission characteristics of harmonic frequency ranges up to the 7th harmonic. Test parameters were varied to identify their impact on test results. These parameter variations include such factors as cooking load, start temperature, oven orientation, and receiver bandwidth. Test procedures of the Federal Communications Commission (FCC), the International Special Committee on Radio Interference (CISPR), and additional procedures developed by NTIA and ITS are also discussed.
|
TR 94-303-1
March 1994
|
Radio Spectrum Measurements of Individual Microwave Ovens - Volume 1
The Radio Spectrum Measurements of Individual Microwave Ovens report was released in March 1994, consisting of Volumes 1 and 2. This report provides results of radio spectrum measurements of 13 individual microwave ovens performed at the NTIA, Institute for Telecommunication Sciences (ITS). Measurements include emission characteristics and time waveforms covering the frequency range 2300-2600 MHZ and oven emission characteristics of harmonic frequency ranges up to the 7th harmonic. Test parameters were varied to identify their impact on test results. These parameter variations include such factors as cooking load, start temperature, oven orientation, and receiver bandwidth. Test procedures of the Federal Communications Commission (FCC), the International Special Committee on Radio Interference (CISPR), and additional procedures developed by NTIA and ITS are also discussed.
|
TR 93-301
March 1994
|
NOAA Special Report: Measurements of Wind Profiler EMC Characteristics
This report provides the results of measurements that were conducted on a 404.37 MHz wind profiler located in Platteville, Colorado. These measurements included: radiated spectra (both high and low mode), radiated harmonic and sub-harmonic power measurements, characterization of the antenna frequency response, determination of the radiated antenna gain values near ground level, susceptibility of profiler performance to interference from selected emission waveforms, and the effects on a typical land mobile/amateur operation from wind profiler emissions. [PDF]
|
SP 94-27
Feb 1994
|
Preliminary Spectrum Reallocation Report: Response to Title VI - Omnibus Budget Reconciliation Act of 1993
The Preliminary Spectrum Reallocation Report was released on February 10, 1994. This report, prepared in response to Title VI of the Omnibus Budget Reconciliation Act of 1993, identified 235 MHZ of radio spectrum for transfer from Federal Government use to private, commercial use. The report marks the first step in a process that will lead the way to major changes in U.S. Management of the radio spectrum. |
TM 94-160
Jan 1994
|
National Land Mobile Spectrum Requirements
The National Land Mobile Spectrum Requirements report was released in January 1994. This report describes the Federal Government's land mobile radio (LMR) usage and trends in the following bands: 30-50, 138-150.8, 162-174, 220-222 and 406.1-420 MHZ. It also presents public (common carriers such as cellular radiotelephone and radio paging), and private sector (including state and local government) uses from 25 MHZ to 1 GHz, related regulatory issues and trends in the land mobile services. The report also contains a discussion on personal communications services. zo, E. Response to Title VI - Omnibus Budget Drocella, E.F., Jr. Reconciliation Act of 1993 Scammon, C. The Preliminary Spectrum Reallocation Report was released on February 10, 1994. This report, prepared in response to Title VI of the Omnibus Budget Reconciliation Act of 1993, identified 235 MHZ of radio spectrum for transfer from Federal Government use to private, commercial use. The report marks the first step in a process that will lead the way to major changes in U.S. Management of the radio spectrum.
|
TR 93-300
Oct 1993
|
Land Mobile Spectrum Efficiency - A Plan for Federal Government Agencies to use More Spectrum-Efficient Technologies
The Land Mobile Spectrum Efficiency - A Plan for Federal Government Agencies to use More Spectrum-Efficient Technologies report was released in October 1993. The IRAC established the Ad Hoc 210 committee to provide a forum for Federal Government agency member-representatives to present their views on telecommunication policies dealing with mobile systems. This committee provided extensive assistance to NTIA in the development of this study and plan. They described requirements of government departments and agencies for mobile radio communication services, and provided both technical and policy comments on the material drafted by NTIA technical staff. Their descriptions of technical requirements and discussions of the policy issues, and the practicality of implementing some of the proposals, contributed greatly to the initial draft of the study and plan. IRAC approved a draft of this study and plan based on the work of Ad Hoc 201. The study was then reviewed by NTIA, Department of Commerce and Congressional Senior Staff members. Their comments led to clarifications and amplifications of the proposed plan and procedures included in this report.
|
TR 93-298
Sept 1993
|
Digital Emission Spectrum Model
The Digital Emission Spectrum Model report was released in September 1993. A computer program was developed to calculate the power spectral density (PSD) and the fractional power containment bandwidth for various digital modulation techniques. The power containment capability was used to provide guidance for determination of necessary bandwidth in support of Annex J of the NTIA Manual. This report documents the models contained in the computer program and illustrates the models with various sample problems. The report also shows the verification of the computer program implementation.
|
May 1993
|
Staff Study - A Preliminary Look at Spectrum Requirements for the Fixed Services |
TR 93-294
Feb 1993
| Federal Government Spectrum Usage in the 902-928, 2400-2500 and 5725-5875 MHz Bands
The Federal Government Spectrum Usage in the 902-928, 2400-2500 and 5725-5875 MHZ Bands report was released in February 1993. This report assesses the Federal Government spectrum usage of these three bands. Current rules and regulations, allocations, and major systems currently operating or planned for operation in each of the bands, as well as systems' deployments and some technical characteristics are identified. Major non- government application of special systems is also addressed whenever data is available.
|
TM 93-158
Jan 1993
| Evaluation of Spectrum Management in Nicaragua
|
TR 92-286
Aug 1992
| Feasibility of Relocating Non-Government Fixed Systems into the 1710-1850 MHz Band
|
TR 92-155
May 1992
| Preliminary Building Attenuation Model (1-30000 MHz)
|
TM 92-285
March 1992 |
Federal Spectrum Usage of the 1710-1850 and 2200-2290 MHz Bands
|
TM 92-154
Jan 1992
|
Accommodation of Broadcast Satellite (Sound) and Mobile Satellite Services in the 2300-2450 MHz Band
|
TR 91-280
Sept 1991
| Assessment of Bands for Wind Profile Accommodation (216-225,400.15-406, and 410-450 MHz)
|
TM 91-152
Dec 1991
| Assessment of Technological Forecasting for Use in Spectrum Management
|
TM 91-149
April 1991
| Measured Characteristics of Selected Non-Licensed Devices
|
SP 91-26
Oct 1991
| Telecommunications in the Age of Information
|
SP 91-25
Aug 1991
| Federal Spectrum Management: A Guide to the NTIA Process
|
SP 91-23
Feb 1991
| U.S. Spectrum Management Policy: An Agenda for the Future
|
TR 90-260
March 1990
| Ground-Based Weather Radar Compatibility with Digital Radio-Relay Microwave Systems
Interference from high powered weather radars to digital microwave systems is a growing problem in the US. The study identified procedures to avoid these problems. The study was completed in coordination with the FCC and industry. Recommendations dealing with exchange of data bases, coordination procedures and other technical areas have been adopted. [PDF]
|
TR 90-259
March 1990
| Hydrologic and Meteorological Operations in the 162-174 and 406.1-420 MHz Bands
Use of Government and non Government flood warning systems in the 162-174 MHz band are growing rapidly in the US. The report investigated ways of improving the spectrum efficiency of these systems to allow for continued growth. Recommendations for narrowing channel widths and allotting certain channels for their use have been adopted. |
TM 90-145
Feb 1990
| Procedure for Calculating the Power Density of a Parabolic Circular Reflector Antenna
This technical report details a procedure for calculating the mainbeam off-axis power density in the near- and far-field of a parabolic circular reflector antenna. In the report, the on-axis procedures of an earlier report are extended to off-axis analysis. Like its predecessors, it is intended for general use in system planning and evaluation and gives a worst-case estimate for radiation hazard assessment. |
SP 89-22
June 1989
| Long Range Plan for Management and Use of the
Radio Spectrum by Agencies and Establishments
of the Federal Government |
TM 89-141
June 1989
| Spectrum Resource Assessment of Government Use of
the HF (3-30 MHz) Band
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. |
TR 89-243
May 1989
| Conservation Techniques for Fixed
Microwave Systems (7125-8500 MHz)
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. [PDF] |
TR 89-242
April 1989
| 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. |
TR 89-241
March 1989
| Meteor Burst System Communications Capability (30-100 MHz)
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. |
TM 89-139
March 1989
| Single and Aggregate Emission Level Models for
Interference Analysis
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 88-236
Aug 1988
| The SUM Database: A New Measure of Spectrum Use
This report describes a new technique for calculating the spectrum space used by existing frequency assignments. The Spectrum Use Model (SUM) determines the amount of spectrum used at a given location or the probability that a given location is unavailable for a new assignment. [PDF] |
TM 88-137
Sept 1988
| 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.
|
TM 88-136
Sept 1988
| 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.
|
TM 88-135
Sept 1988
| Procedures for Calculating Field Intensities of
Antennas: Phase II
This technical memorandum provides additional guidance in applying procedures for finding the near field power density. The technical memorandum also examines the feasibility of using simple models to calculate the off-axis near-field power density of wire and aperture antennas. [PDF]
|
TM 88-134
Sept 1988 |
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.
|
TM 87-131
Oct 1987
| Evaluation of Computer-Aided Spectrum Management
in Thailand |
TM 87-129
Sept 1987
| Procedures for Calculating Field Intensities of Antennas
This technical memorandum discusses simplified procedures for calculating near field and far field intensities of several types of aperture and wire antennas. [PDF] |
TM 87-127
Sept 1987
| Spectrum Resource Assessment of the Federal
Government Fixed Service (Bands above 400 MHz)
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. |
TM 87-123
Aug 1987 |
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.
|
TM 87-125
July 1987 |
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. |
TM 87-122
June 1987 |
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.
|
TM 87-121
Feb 1987 |
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.
|
TM 86-117
Nov 1986 |
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. |
TM 86-115
Sept 1986
|
Application of the Technical Spectrum Efficiency
Factor (TSEF) to the Fixed Service Three Frequency
Bands (7000-8000 MHz)
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. |
TR 86-199
Aug 1986 |
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).
|
TR 86-198
Aug 1986 |
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.
|
TR 85-183
Nov 1985 |
Technical Basis for the Geostationary Satellite
Orbit Analysis Program (GSOAP) |
TR 85-181
Sept 1985 |
Evaluation Techniques -- Fixed Service Systems to
Power-Line-Carrier Circuits
1.5000 to 1.9000 MHz |
TR 85-180
Sept 1985 |
Spectrum Resource Assessment of Unlicensed
Electronic Devices |
TR 85-178
Sept 1985 |
An Assessment of the Future of Travelers'
Information Stations
(525-1615
KHz) |
TR 85-175
April 1985 |
Spectrum Resource Assessment of the 1605-2000 kHz
Band |
TM 85-111
April 1985 |
Evaluation of Computer-Aided Spectrum Management
in Venezuela
|
TR 84-168
Feb 1985
 |
Necessary Bandwidth and Spectral Properties of
Digital Modulation |
TM 85-109
Feb 1985 |
Evaluation of Computer-Aided Spectrum Management
Papua New Guinea |
TR 85-179
Feb 1985 |
Spectrum Resource Assessment of the 947-17000 Band, Part II
|
NTIA 84-168
Feb 1985 |
Necessary Bandwidth and Spectral Properties of Digital Modulation
This report shows that for digital modulation systems, the necessary bandwidth, signal power, and bit error rate are all interrelated and tradeoffs among these factors are possible. [PDF] |
NTIA 84-162
Sept 1984 |
Spectrum Resource Assessment of the Aeronautical Mobile Service Between 400 MHZ and 17.7 GHz [PDF] |
NTIA 84-160
Sept 1984 |
Spectrum Resource Assessment of the 1530-1660.5 MHz Band [PDF] |
NTIA 84-159
Sept 1984 |
Spectrum Resource Assessment of the 7125 - 8500 MHz Band |
NTIA 84-152
| Assessment of Satellite
Power Flux-Density Limits in the 2025-2300 MHz Frequency
Range, Part II
[PDF] |
NTIA 83-134
Oct 1983 |
FM Spectral Modeling and FDM/FM Simulation Programs
This report is concerned with the spectral representation of analog frequency modulated (FM) signals, with particular attention to frequency division multiplexing (FDM)/FM satellite communication systems. The FM spectral modeling and gaussian approximation principles are analyzed and extended to develop computer simulation programs capable of providing representative FM spectra. [PDF] |
NTIA 83-117
April 1983 |
Background Study on Efficient Use of the 2700-2900 MHz Band
This report summarizes the findings of an analysis that addresses accommodating new radar systems in the 2700-2900 MHz band based on projected growth in the band and projected radar deployment patterns. [PDF] |
NTIA 83-115
Jan 1983 |
Spectrum Resource Assessment in the 5650-5925 MHz Band
This report is a Spectrum resource Assessment of the 5650-5925 MHz band. Included in information on rules and regulations, allocations, technical standards, frequency assignments, system characteristics, and applicable compatibility analysis. [PDF] |