US military is furious at FCC over 5G plan that could interfere with GPS

Enlarge / Dana Deasy, Department of Defense chief information officer, testifies during a Senate Armed Services Committee hearing on May 6, 2020 in Washington, DC. (credit: Getty Images)

GPS is facing a major interference threat from a 5G network approved by the Federal Communications Commission, US military officials told Congress in a hearing on Wednesday.

In testimony to the Senate Committee on Armed Services, Department of Defense Chief Information Officer Dana Deasy disputed the FCC's claims that conditions imposed on the Ligado network will protect GPS from interference.

When the FCC approved Ligado's plan last month, the agency required a 23MHz guard band to provide a buffer between the Ligado cellular network and GPS. Deasy argued that this guard band won't prevent interference with GPS signals:

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