1 dB a Poor Benchmark for GPS Protections, Roberson Says
Using 1 dB as the best metric for protecting GPS from interference (see 1912050070) is flawed, using "the magician’s sleight of hand" to conflate 1 dB noise floor and harmful interference, Roberson and Associates President Dennis Roberson blogged Friday. He…
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said no regulator has used that metric to define harmful interference or safeguard services operating outside of assigned spectrum. He said 1 dB doesn't indicate harmful interference since it doesn't correlate with a change in GPS device functionality, and it's not reliable as noise floor can fluctuate by several dB even without terrestrial transmissions. The GPS Innovation Alliance didn't comment.