u-blox M9 GNSS Platform Achieves Meter‑Level Accuracy and Advanced Security

Two of the most critical challenges in positioning technology are accuracy—especially in dense urban canyons—and the trustworthiness of the reported location. With its new M9 global positioning technology platform, u‑blox claims to tackle both issues head‑on, delivering meter‑level precision while actively detecting spoofing attempts through integrated RF filtering and sophisticated detection algorithms.

The platform is built around the UBX‑M9140 chip, which offers robust positioning and security features for automotive, telematics, and UAV applications. By simultaneously receiving signals from up to four GNSS constellations (GPS, Glonass, Beidou, and Galileo), the M9 can achieve an accuracy of 1.5 m even in the most challenging environments, such as deep urban canyons. A position update rate of up to 25 Hz ensures low‑latency data for dynamic systems like UAVs.

In a briefing with EE Times, product manager Bernd Heidtmann highlighted the growing threat of spoofing attacks. "In automotive applications, a GNSS device that reports a false time or position can undermine a company’s business model—especially when location data drives usage billing or other critical services," he explained. "A spoofing attack can be launched with inexpensive equipment, but the u‑blox M9 monitors all four constellations, performs consistency checks, and flags any anomalies, allowing the host system to react promptly and mitigate the threat."

Detecting and mitigating RF interference (Source: u‑blox)

Robust RF interference mitigation is built into the UBX‑M9140. A notch filter delivers in‑band filtering for narrow‑band signals, while a surface acoustic wave (SAW) filter and low‑noise amplifier (LNA) reduce out‑of‑band interference—ensuring reliable operation even when a cellular modem is co‑located on the same board.

Unlike its predecessor, the M8, the M9’s architecture allows firmware upgrades directly from flash memory or via the host system, eliminating the need for onboard flash storage and freeing board space. This flexibility also enables developers to maintain a single PCB design while easily integrating complementary technologies such as dead‑reckoning or inertial navigation systems.

To help developers evaluate the new platform, u‑blox offers the Explorer Kit—a compact, plug‑and‑play module equipped with user‑friendly u‑start software and preset scenarios that showcase the M9’s performance in real‑world conditions.

The M9 technology platform complies with ISO/TS 16949, ISO 16750, and AEC‑Q100 standards. Engineering samples of the NEO‑M9N module, the UBX‑M9140 chip, and the Explorer Kit are now available for purchase.