A new 5G-based navigation system could soon serve as a low-cost backup to GPS and other global navigation satellite systems, which are increasingly vulnerable to jamming, spoofing, and space-weather disruptions. NextNav, a company in Virginia, has tested a system that uses the 900-MHz radio band to broadcast a special 5G positioning reference signal. Instead of relying on satellites, it uses nearby 5G towers to triangulate user location. Because these towers are close to users and transmit stronger signals than satellites, the system is far more resistant to interference and works better inside buildings and dense cities.
NextNav says the technology can be integrated into existing 5G networks with only minor regulatory changes and no new hardware for most users, making it more practical than other GPS alternatives that require new infrastructure or devices. Experts like retired Rear Admiral David Simpson highlight that relying solely on GPS is risky, especially with ongoing disruptions in conflict zones like Ukraine and Israel. If approved by the FCC, this 5G-based Position, Navigation, and Timing (PNT) system could be deployed during regular network upgrades, offering a unified 3D location and timing service. Real-world testing is planned in San Jose, California.
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