GPS/GNSS Receiver and Positioning Engine Solution

Sony Semiconductor Solutions GPS/GNSS receiver/processor chips use high-frequency analog circuits and digital signal processing circuits with proprietary designs to deliver accurate positioning with the lowest power consumption level in the industry. This low power consumption performance helps to extend the operating times of the IoT and wearable products that use GPS/GNSS.

As location-aware IoT (Internet of Things) devices intend to spread across almost every application, IoT devices are going to require different GNSS (Global Navigation Satellite System) receiver design requirements. To deliver on IoT opportunities, system architects and designers need to look carefully at every aspect of system design and architecture to be able to enable the full potential of the IoT era. IoT devices are equipped with different connectivity sensors that can provide a reliable integrated location-awareness solution. IoT devices are mainly relying on the GNSS chip to deliver a service when no other RF signal is available. Hence, the GNSS chip is expected to maintain a robust and reliable performance even in harsh environments. The harsh environments include multipath environment, NLOS (Non-Line of Sight) GNSS signal reception, weak GNSS signal power reception, superimposed motion (e.g., arm swing, floating platform fluctuation…etc.), operation under freezing temperature, and interference.

Features

  • Low power consumption
    Newly developed high-frequency analog circuits such as dedicated low power consumption A/D converter, low noise amplifier, and phase synchronization circuits, and optimal power control and low power consumption circuits achieve operation with the lowest power consumption level in the industry.
    This enables GPS/GNSS positioning even by products that operate using solar cells.
  • Positioning performance
    GPS/GNSS receiver design has faced many challenges since PND (Personal Navigation Device). It started with the need to provide an accurate position in the urban area since the main application was a handheld device fixed on the dashboard of a vehicle. Once feature phones and smartphones started to penetrate the market, E-911 and LBS (Location-based services) began to emerge. E-911 demanded TTFF and sensitivity, while LBS applications demanded power consumption and positioning accuracy. The two main challenges were multipath and weak signal acquisition and tracking.
    The rise of wearable devices and the need for an embedded GNSS chip add a new set of challenges. The wearable device is more prone to ground reflections, multipath reflection from short distances, disruptive dynamics due to arm swinging; and deep attenuation due to limited visibility and device orientation on the armrest.
    The received signal strength for the IoT and wearable products is quite weak compared to conventional products that use GPS for other applications (e.g., car navigation systems). A primary reason might be due to the performance of the low-cost antenna and operating environment. In addition, the received signal condition might be degraded further for wearable devices due to the influence of the user's arm movements among other use case factors.
    Sony Semiconductor Solutions GPS/GNSS receiver/processor chips use a proprietary positioning algorithm to enable good positioning performance even under these harsh conditions.
  • Space-saving (small area)
    Use of a compact package realizes a positioning system with an area of 70 to 100 mm2 or less, including peripheral circuits.

Applications: GPS watches, cameras, wearable products, monitoring, and healthcare products

Products

CXD5603GF,CXA3846GF,CXD5600GF

Left: CXD5603GF, center: CXA3846GF, and right: CXD5600GF

  • CXD5603GF
    • Continuous tracking mode: 6 mW
    • Optional power supply IC (CXA3846GF)
  • CXD5600GF
    • Continuous tracking mode: 16 mW
    • DC-DC converter and other power supply circuits built-in

Specifications

Specifications
Item CXD5603GF CXD5600GF Note
Power consumption
@ continuous tracking
6 mW 16 mW NMEA output @ 1 Hz
Constellation GPS/GLONASS
Galileo/BeiDou
GPS/GLONASS  
Sensitivity Cold Start: -147dBm/Hot Start: -161dBm/Tracking: -161dBm  
TTFF Cold Start: -35s/Hot Start: 1s  
Input voltage 0.65V to 0.75V (w/o LDO) /
0.90V to 1.95V (w/ LDO)
1.40V to 3.63V  
Assisted GPS Yes  
Geofence Yes  
Package 3.0 mm × 3.0 mm
49-pin WLCSP
3.0 mm × 3.0 mm
48-pin WLCSP
No pin compatibility
FLASH memory Optional Required  
Op. Temp. -40°C to 85°C -25°C to 85°C  

Trajectory in Locations Where GNSS Reception Is a Challenge

The targeted low-cost and low-power system design, along with the expected harsh operational environment, derived us to face exceptional GNSS signal reception conditions.

Sony Semiconductor Solutions GPS/GNSS receiver/processor chips use a proprietary positioning algorithm to enable accurate positioning in a challenging environment, such as the skyscrapers of Shinjuku (i.e., multi-path environment) and/or when running on an athletics track (i.e., body effect, such as arms swinging and swimming).