The study was conducted in accordance with the Middle Class Tax Relief and Job Creation Act of 2012, in consultation with the Department of Defense and other impacted agencies. The law referred to two separate evaluations, however this initial report encompasses both segments of spectrum. The report explored known and proposed spectrum-sharing technologies, as well as potential risks to federal users should the FCC allow U-NII devices to operate in these bands. These U-NII devices, currently operating in 5150-5350 MHz and 5470-5825 MHz, "provide short-range, high-speed unlicensed wireless connections in the 5 GHz band or, among other applications, Wi-Fi-enabled radio local area networks, cordless telephones, and fixed outdoor broadband transceivers used by wireless internet service providers."
Federal users currently operating in the two 5 GHz bands in this report utilize this spectrum for various radar systems including airborne, ground-based, shipborne, and space-based platforms. In addition, many airborne communications systems across the nation use these bands for training and testing of unmanned aircraft systems (UAS) data and command links for intelligence, surveillance, reconnaissance and combat search and rescue missions, among other uses.
Risk factors due to likely harmful interference from U-NII devices were identified in the report, but the NTIA concluded that more information and further analysis is required to determine how the risk factors can be mitigated. The FCC will conduct further analysis of potential mitigation with regard to regulatory proceedings. The NTIA plans to lead more detailed studies, described in the report.
Read more at the NTIA's website.
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