Fight Deepens Over NextNav Proposal for the 900 MHz Band
The fight continues at the FCC over a NextNav proposal asking the regulator to reconfigure the 902-928 MHz band to enable a “terrestrial complement” to GPS for positioning, navigation and timing (PNT) and a Pericle study on potential interference filed by the Security Industry Association (see 2510230041).
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The Industry Council for Emergency Response Technologies joined other public safety groups in raising interference concerns (see 2511190040). “Notwithstanding the critical importance of developing other PNT solutions, evidence presented to the FCC indicates that NextNav’s proposed PNT alternative would create harmful interference to other wireless operations, including those used to support public safety,” said a filing Friday in docket 25-110. The lower 900 MHz band is used for public safety applications “including wireless alarms and security systems, medical alert and personal emergency devices, fire and life safety devices, panic buttons, and a variety of outdoor security applications that promote public safety.”
NextNav, meanwhile, slammed the Pericle study. Its “conclusions cannot be reconciled with the realities of physics,” and its “predicted 5G emission levels exceed even free-space conditions.” Pericle’s Monte Carlo results aren’t reproducible, NextNav added. “Using Pericle’s own parameters and methods produced a far lower likelihood of interference than what Pericle reported, which indicates errors in Pericle’s simulation.”