Dual-frequency GNSS receiver introduced
Broadcom has introduced what is claimed to be the World’s first dual-frequency GNSS consumer receiver with centimetric accuracy.
US company Broadcom Ltd has introduced its BCM47755 as a mass-market, dual-frequency GNSS receiver designed to enhance location based services (LBS) applications for the likes of mobile phones, tablets and fitness wearables. It measures 15 × 9 × 5 mm.
It explains that the device is equipped with the latest GNSS innovations and is capable of centimetric accuracy with minimal power consumption and footprint - enabling new high-precision LBS applications, including lane-level vehicle navigation and mobile augmented reality (AR).
The higher precision is largely due to the fact that the delay of GNSS signals passing throught the ionosphere - the ionospheric group delay - is inversely proportional to frequency squared; hence, with 2 frequencies received from each satellite, an accurate estimate of total electron content (TEC), and therefore delay for each satellite used in calculations, can be made.
The BCM47755 can simultaneously receive the following signals:
- GPS L1 C/A
- GLONASS L1
- BeiDou (BDS) B1
- QZSS L1
- Galileo (GAL) E1
- GPS L5
- Galileo E5a
- QZSS L5
The manufacturer stresses that the BCM47755 delivers this higher level of location accuracy whilst also meeting rigorous battery power and footprint needs in devices such as mobile phones.
Further details can be found at the links below . .