April 2020 | Technical Report NTIA TR-20-548
3.45–3.65 GHz Spectrum Occupancy from Long-Term Measurements in 2018 and 2019 at Four Coastal Sites
Cite This Publication
Michael G. Cotton, Linh P. Vu, Bradley Eales, and Adam C. Hicks, “3.45–3.65 GHz Spectrum Occupancy from Long-Term Measurements in 2018 and 2019 at Four Coastal Sites,” Technical Report NTIA TR-20-548, U.S. Department of Commerce, National Telecommunications and Information Administration, Institute for Telecommunication Sciences, April 2020.
Michael G. Cotton 
, Linh P. Vu , Bradley Eales , and Adam C. Hicks
Abstract: This report presents spectrum occupancy results for 3.45–3.55 GHz and for 3.55−3.65 GHz at sensor sites near San Diego CA (SD), Norfolk VA (NF), San Francisco CA (SF), and Astoria OR (AS). Sensors operated at the following {start date, end date, 2018 reliability, 2019 reliability}: SD {05/17, 09/19, 53.2%, 35.4%}, NF {05/17, 12/19, 61.7%, 74.2%}, SF {11/17, 12/19, 86.4%, 28.7%}, AS {05/18, 09/19, 46.7%, 100.0%}. The acquired data was processed to monthly and yearly mean band occupancy estimates. At ports with high military presence,{2018, 2019} yearly mean band occupancy levels were {25.0, 21.9}% in SD and {9.0, 9.9}% in NF for 3.45−3.55 GHz and {14.7, 13.3}% in SD and {13.6, 22.4}% in NF for 3.55−3.65 GHz. At ports with low military presence, {2018, 2019} yearly mean band occupancy levels were {1.0, 0.3}% in SF and {0.3, 0.2}% in AS for 3.45−3.55 GHz and {0.1, 0.0}% in SF and {0.0, 0.1}% in AS for 3.55−3.65 GHz.
Keywords: radar; spectrum sharing; spectrum occupancy; spectrum monitoring; 3550–3650 MHz; Citizens Broadband Radio Service (CBRS); 3450–3550 MHz
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Todd Schumann
Institute for Telecommunication Sciences
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tschumann@ntia.gov
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