February 2007 | NTIA Technical Memo TM-07-446
NTIA Technical Memorandum 07-446: Bandwidth Correction Factor Equations to Assess the Interference Impact of Impulse and Pulsed Signals on Radio Receivers
Edward F. Drocella Jr.; David S. Anderson
Abstract: This report presents four sets of equations developed by the National Telecommunications and Information Administration (NTIA) Office of Spectrum Management (OSM) to compute the bandwidth correction factor (BWCF) for peak and average power levels and for pulsed and dithered and non-dithered impulse signals. These equations were developed as part of analyses performed to determine the maximum allowable equivalent isotropically radiated power (EIRP) of unlicensed ultrawideband (UWB) devices. The analyses were performed to assess the compatibility between UWB devices and selected Federal systems operating above 960 MHz. The objective of the measurements and analysis documented in this technical memorandum is to develop BWCF equations for impulse and pulsed signals to be used in interference assessments. In order to accomplish this objective, ITS measured power levels of impulse and pulsed signals with various pulse repetition frequency (PRF) values received in various measurement bandwidths. The analysis in this technical memorandum shows that the measured BWCF data is consistent across the different types of impulse and pulsed signals and PRFs considered. This report also presents an explanation of how to apply these sets of equations to convert peak and/or average power levels to the levels expected in a different bandwidth.
Keywords: spectrum engineering; equivalent isotropically radiated power; spectrum management; bandwidth correction factor; impulse signals; peak power level
To request a reprint of this report, contact:
Ed Drocella, Chief,
Spectrum Engineering and Analysis Division
Office of Spectrum Management
National Telecommunications and Information Administration
Disclaimer: Certain commercial equipment, components, and software may be identified in this report to specify adequately the technical aspects of the reported results. In no case does such identification imply recommendation or endorsement by the National Telecommunications and Information Administration, nor does it imply that the equipment or software identified is necessarily the best available for the particular application or uses.