Institute for Telecommunication Sciences
the research laboratory of the National Telecommunications and Information Administration

Institute for Telecommunication Sciences / About ITS / 2015 / Reports Examine the Effect of Broadband Radio Service Reallocation on 2900-3100 MHz Marine Radars

Reports Examine the Effect of Broadband Radio Service Reallocation on 2900-3100 MHz Marine Radars

April 14, 2015

As announced on the NTIA Blog on April 14, ITS three technical reports just released by ITS describe a multi-year research effort funded by the United States Coast Guard to investigate effects of reallocation to accommodate broadband radio services on the 2900–3100 MHz band marine radar service. NTIA Technical Report TR-15-513: Effect of Broadband Radio Service Reallocation on 2900–3100 MHz band Marine Radars: Background provides background information needed to understand the potential effects of sharing on S-band marine radars, including a discussion of the scenario, interference protection criteria, and propagation models used to perform the analysis.  NTIA Technical Report TR-15-514: Effect of Broadband Radio Service Reallocation on 2900–3100 MHz band Marine Radars: Base Station Unwanted Emissions calculates distance and frequency separations needed to prevent signals from commercial broadband systems from introducing unwanted emissions in the radar detection bandwidth and causing interference.  The third report NTIA Technical Report TR-15-515: Effect of Broadband Radio Service Reallocation on 2900–3100 MHz Band Marine Radars: Front-end Overload provides a method for analyzing and mitigating radar front-end overload caused by commercial broadband systems transmitting at frequencies within the radar front-end bandwidth.  The results of these studies will help inform policy makers on potential future sharing options between incumbent federal systems and commercial wireless broadband systems.