The role of GNSS in wearables
GNSS is the technology that turns a wearable into a location-aware device. It enables real-time tracking, distance and speed measurement, route tracking, altitude data, and geofencing — the building blocks of the majority of wearable applications on the market today.
As wearable technology has become more mainstream, consumer expectations for the technology rose. Nowadays, users expect wearables to provide them with:
- Instant positioning, with no waiting while the satellites converge.
- Reliable positioning that can cope with urban environments, tree cover and similar obstructions.
- Long battery life so that charging the device is never a limiting factor.
Meeting those expectations in a device small enough to wear on your wrist, and power-constrained enough to last all day (or even longer), requires GNSS technology that is purpose-built for the challenge.
Challenges in wearable positioning
Delivering high-quality GNSS in a wearable is one of the more demanding challenges in consumer electronics. The constraints pull in multiple directions simultaneously, and trade-offs are unavoidable without the right technology.
Ultra-compact form factors
The space available in most wearable devices is severely limited, and antenna size directly affects GNSS performance. Designing a module small enough to fit the form factor without compromising signal reception requires careful engineering at every level.
Power consumption
In a typical smartwatch, GNSS can account for a significant amount of total power draw during active use. Balancing continuous tracking against battery life is one of the central design challenges in the category, and users are unforgiving of devices that run out of power mid-activity.
Position accuracy in dynamic environments
Wearables are used everywhere: in dense urban centers with signal-reflecting buildings, in transition zones between indoor and outdoor spaces, and in motion-intensive activities like running, swimming or cycling. Each environment introduces its own positioning challenges, from multipath effects in city streets to the need for different movement models.
Time-to-First-Fix
Consumer devices set high expectations for responsiveness. A user pressing ‘start’ on their run doesn’t want to wait for the device to acquire a GNSS signal. Fast Time-to-First-Fix (TTFF) is a direct contributor to user experience, and needs to be as short as possible.
Design complexity and integration trade-offs
Engineers developing wearable products must balance GNSS performance against cost, size, and design complexity. A solution that requires extensive custom RF work or a complex antenna design may be impractical for a product with a mass-market price point or an aggressive development timeline.
u-blox solutions for wearables
u-blox approaches wearable GNSS with a clear set of priorities: ultra-low power consumption, compact design, and meter-level positioning accuracy in real-world conditions. Our solutions are engineered for the constraints of wearable devices, so you don’t have to compromise on performance to meet your size and battery targets.
Working with u-blox gives you a number of technologies designed specifically for wearable technology:
LEAP technology
Short for low energy accurate positioning, LEAP uses smart signal selection, assisted GNSS data download and low update rate tracking to provide accurate positioning while using up to 50% less power than previous generations.
Learn more about LEAP
Multipath mitigation technology
Robust multipath mitigation and dual-band signal processing mean u-blox modules perform in the environments where wearables are actually used: city streets, mixed terrain, and high-motion activities. You can promise your users accurate data with confidence.
Learn more about multipath mitigation
Selective L5 technology
u-blox devices intelligently switch between L1 single-band operation and L1/L5 dual-band operation so that the L5 band isn’t used when it isn’t needed, reducing power usage without compromising accuracy.
Learn more about Selective L5
Swimming mode
Our swimming mode is the result of decades of experience delivering accurate position in challenging environments. It enables you to build wearables that provide accurate position, swim distance and speed in open water, increasing the versatility of your product.
Learn more about swimming mode