NextNav Files Engineering Report on 900 MHz Interference
NextNav filed at the FCC a new engineering report on interference issues raised by the company’s proposal that the FCC reconfigure the 902-928 MHz band “to enable a high-quality, terrestrial complement” to GPS for positioning, navigation and timing services (see 2404160043). “NextNav undertook this analysis in response to claims in the record that allowing 5G deployment in the 902-928 MHz band could cause unacceptable levels of interference to unlicensed Part 15 devices,” said the report, filed last week in docket 24-240.
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The report looks at whether replacing authorized multilateration location and monitoring services (M-LMS) operations with 5G is “likely to cause unacceptable interference to unlicensed operations that already thrive in noisy environments.” Using “real-life scenarios and analyzing a broad range of unlicensed technologies, the study finds that 5G operations would have lower power density levels than M-LMS, that any additional emissions 5G deployments might generate will be marginal compared to the emissions already present, and that 5G can therefore coexist with unlicensed Part 15 devices in the 902-928 MHz band.”
The report said proposed 5G downlink operations “will not exceed those of the currently authorized M-LMS deployments.” An analysis of NextNav’s San Francisco M-LMS network “reinforces confidence that 5G will not cause unacceptable levels of interference to Part 15 devices,” it said.