MobileNavigation

Amap Tech

Mar 2, 2022 · Fundamentals

Why GPS Signal Can Be Weak and How to Mitigate It

GPS signals can become weak due to tiny phone antennas and strong electromagnetic interference—especially in cars—plus device‑specific hardware limits, but moving the phone, waiting a few seconds, and relying on sensor fusion, network‑based positioning, and advanced decoding algorithms can substantially improve accuracy.

AntennaDesignGNSSGPS

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Why GPS Signal Can Be Weak and How to Mitigate It

Amap Tech

Sep 11, 2020 · Artificial Intelligence

Elevated Road Network (ERNet): A Lightweight Industrial‑Grade Neural Network for Elevated Road and Yaw Detection in Mobile Navigation

ERNet is a lightweight industrial‑grade neural network that detects elevated roads and vehicle yaw in mobile navigation by leveraging four high‑semantic features—satellite plane projection, group ID, elevated‑road distance, and sequential speed—trained on roughly one billion auto‑labeled samples and achieving about 99 % precision/recall and over 99 % yaw accuracy, surpassing existing map‑matching and machine‑learning baselines.

ERNetMobileNavigationNeuralNetwork

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Elevated Road Network (ERNet): A Lightweight Industrial‑Grade Neural Network for Elevated Road and Yaw Detection in Mobile Navigation