Nicholas DeMinco; Christopher J. Behm; Timothy J. Riley

Abstract: When communication systems operating in one band must be moved to another band occupied by existing (incumbent) systems, an electromagnetic compatibility (EMC) analysis is used to evaluate the viability of spectrum sharing and frequency reassignments. The analysis starts with gathering all of the transmitter and receiver parameters of both systems. The correct propagation model for different geometric scenarios is then used to accurately estimate the signal strength of the interfering signal and determine the noise level of the victim receiver. If the separation distance is not adequate to reduce the interfering signal to an acceptable level, then the necessary frequency dependent rejection (FDR) must be determined. Finally, the interference-to-noise ratio (I/N) can be calculated which will allow a determination of frequency separation versus separation distance from the FDR curves.

Keywords: electromagnetic compatibility (EMC); interference; spectrum sharing; electromagnetic compatibility (EMC) analysis; frequency allocation; propagation loss; Receiving antennas; electromagnetic interference; receivers; transmitters; EMC analysis; FDR curve; band migration; frequency dependent rejection; frequency reassignment; frequency separation; interference-to-noise (I/N) ratio; interfering signal; president spectrum initiative; receiver parameter; signal strength estimation; transmitter parameter; Predictive models; Transmitting antennas

To request a reprint of this report, contact:

Lilli Segre, Publications Officer
Institute for Telecommunication Sciences
(303) 497-3572
LSegre@ntia.gov

For technical information concerning this report, contact:

Nicholas DeMinco
Institute for Telecommunication Sciences
(303) 497-3660
ndeminco@ntia.doc.gov

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.

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