Audio
Deep Learning in GNSS Orbit and Clock Extended Predictions to Improve the Accuracy and Robustness of Positioning (AG3335 Series) [ION GNSS+ 2023]
GNSS Satellite orbit predictions are used to reduce the Time to First Fix (TTFF) of a satellite positioning device.
Performance Improvement of Wearable GNSS Navigation with Smart Sensor Aiding (AG3335M Series) [ION GNSS+ 2023]
Wearable device has been one of the most popular consumer products these days. One of the key features for wearable device is the sport and health application. For example, users get used to record the running trajectory and odometer by using the wearable GNSS navigation system and track their sport performance from the record. Nowadays, wearable device supplier utilizes the micro-electro-mechanical systems (MEMS) inertial measurement unit (IMU) to further expand the applications, such as activity recognition and pedometer. However, these two technologies have not been tightly cooperated. Due to the size and hardware limitation of the antenna design in wearable device, GNSS performance is fragile in GNSS-harsh environments, urban area, forest canopy. Especially for the speed information, it is vulnerable to unstable pseudo range and doppler measurements from bad satellites. Moreover, bad speed estimation will also result in the performance of trajectory and odometer, which are the two major standards for the users to evaluate their sport performance.
Machine Learning-based Vehicle/Human Motion Detection of Low-cost IMU for Two-wheeler DR Navigation (AG3335AD Series) [ION GNSS+ 2022]
Inertial navigation has made numerous applications for many years. One of the leading advantages is the self-contained ability to track the position and orientation of a vehicle. Nowadays, micro-electro-mechanical systems (MEMS) inertial measurement unit (IMU) enable the users to have more opportunities developing more dead-reckoning (DR) techniques on the small chip and build a great amount of potential in wheeled platform market, such as shared bike, shared e-scooter, automobile, etc. However, the conventional DR solution is not adaptive for different wheeled platforms, especially in two-wheeler applications.
Low Power Dual-frequency Multi-constellation GNSS Receiver Designed for Wearable Applications (AG3335 Series) [ION GNSS+ 2022]
Fitness wearable application in one of important category in consumer solution with GNSS (Global Navigation Satellite System). In general, fitness wearables are wrist-worn devices, and they can record the trajectory and provide the statics of speed and total distances for fitness trainers, for example, runners, cyclists, and swimmers. As the more constellations (GPS, GLONASS, Galileo, Beidou, etc..) and frequencies (L1, L2, L5, etc.) are available for civilian use, high-end wearable products with multi-GNSS are expected to provide better positioning reliability.