Spectrum Engineering Reports
NOTE: These reports are available either on-line in PDF (portable document) format or only as hard-copy. 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:
NTIA Office of Spectrum Management
System Engineering and Analysis Division
Tel. (202) 482-2608
Fax (202) 482-4595
e-mail edrocella@ntia.gov
An Assessment of the Future of Travelers' Information Stations (525-1615 KHz)
Spectrum Resource Assessment of Unlicensed Electronic Devices
Evaluation Techniques -- Fixed Service Systems to Power-Line-Carrier Circuits 1.5000 to 1.9000 MHz
Technical Basis for the Geostationary Satellite Orbit Analysis Program (GSOAP)
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.
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).
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.
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.
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.