Higher Precision Dual-Band Sub-Meter Level GNSS Positioning Module for eMobility

LC29D Dual-Band Sub-Meter Level GNSS Positioning Module

Quectel has introduced a new generation sub-meter level positioning module (LC29D) based on the Broadcom BCM47758 GNSS chip. The newly introduced module is uniquely positioned to address very high precision LBS requirements for both industrial and consumer markets.


Measuring 16.0mm×12.2mm×2.4mm, the LC29D uses the 28nm process and an integrated low power consumption algorithm, thereby extending the battery life and making it ideal for power-sensitive devices like small eMobility vehicles, e-Scooters, e-Skateboards, trackers, etc.


The module can concurrently receive signals from up to six constellations (GPS, GLONASS, Galileo, IRNSS, BeiDou, and QZSS) at any given time, thereby maximizing the availability of sub-meter level accuracy. It combines GNSS signals from dual-frequency bands (L1/L5) and RTK technology which improves its overall performance even in difficult conditions. Besides, the module can also mitigate multipath effects in urban cities.


The position update rate of up to 30Hz (fusion output) that the module offers enables dynamic applications like shared eMobility, delivery robots, and precision agriculture to receive position information with lower latency. Easy integration of advanced RTK multi-band algorithms makes the module apt pick for the developers as they can pace up with the development process.


The 6-axis MEMS sensor that this module comes endowed enables the devices to quickly report motion, thereby ensuring consistent high-precision positioning capabilities when combined with the dead reckoning (DR) algorithm, even in the weak-signal environment.


This high-precision module offers better performance in positioning precision, sensitivity, time to first fix (TTFF), update rates, and latency. It also integrates a surface acoustic wave (SAW) filter which filters out the undesirable interfering frequencies and a low noise amplifier (LNA) in the RF path that can increase the signal strength of weak radio signals to improve the sensitivity of the receiver system.