Faster Location Acquisition with a Single RF Chain

Sunnyvale, California, 07 December 2023

A series of tests consistently show oneNav’s pure L5-band outperforming competitors by attaining location data faster using only modern L5-band GNSS signals. In GNSS, an industry lacking general testing standards, the time to obtain location from a satellite without the receiver storing any previous data is a reliable point of performance comparison between competing receivers. The reliability of this point of comparison is particularly important when groundbreaking new technology is evaluated against established, but dated, solutions that rely on a two-antenna, two-signal system.  

Widely known as the legacy signal, the L1 signal was designed fifty years ago and has become a default source of location data for GNSS receivers integrated in consumer products. Today, modernized location signals in the L5-band offer high-performance with close to military-grade immunity from interference and jamming, but dual-band solutions offer only a partial advantage of its full potential. Added as a tandem feature to L1, L5 is in a parent-child relationship that is dependent on the capricious nature of the parent. 

This dependency translates into the timing differences we see when acquiring location data. The data below reflects a series of tests carried out in deep urban canyons of San Francisco and compare the performance of oneNav’s pure L5-band receiver against the top competitors. The speed at which the receiver obtains the location data for the first time is shown in the table under TTFF[sec] (Time To First Fix). For oneNav, the results consistently stay under one minute (Table1) proving the superior performance of the signals in the L5-band when those signals are acquired directly.  

Table1. Drive test results for TTFF in the San Francisco Financial District. The performance of oneNav’s hardware and software in cold start is compared against the performance of two leading competitors. The test was repeated for Competitor A and oneNav to closely examine the extreme values obtained in Test1. CEP50 shows that 50% of the results were equal to or better than the value seen in the table

Image1. TTFF test route in San Francisco Financial District

The consistent outperformance of oneNav’s pure L5-band in acquiring location data faster using modern L5-band GNSS signals underscores the efficacy of this technology compared to competitors. The comparison highlights the reliability of Time To First Fix as a key performance indicator, emphasizing the superiority of L5-band signals acquired directly over legacy L1 signal-dependent alternatives.

About oneNav

oneNav is pioneering high performance, low power positioning for location-dependent mobile services. The oneNav team comprises top GNSS experts from Qualcomm, Apple, Intel, SnapTrack, SiRF, uBlox, Trimble and eRide with decades of GNSS and mobile industry experience. The team has expertise in GNSS system architecture, multipath mitigation, signal processing, ASIC design and AI/machine learning, and collectively has filed over 300 career GNSS patents.

Media Contact

Ellen Kirk