GPS Module: CW19

Description
The CW19 is a small size GPS
receiver with integrated antenna that
has been specifically designed for
use in weak signal GPS environments
and ease of use with USB
connectivity, while maintaining all the
features of a standard GPS solution,
such as high accuracy.
Normal GPS systems cannot track
satellites below -175 dBW (-145 dBm)
however the CW19 can track down a
further 10 dB resulting in tracking
down to -185 dBW (-155 dBm). This makes it
possible to track the person, asset or vehicle as
they enter buildings, move under dense vegetation,
or drive through dense urban canyons. In
order to obtain this level of performance the CW19
uses an innovative GPS engine built into its
BB25IC, which enables the system to search in
parallel 12288 time/frequency bins. Not only does
this enable better sensitivity but also makes for
very rapid acquisition of the satellites. At outdoor
signal levels the time taken to obtain a hot
position fix is under 2 seconds.
The CW19s integrated package and USB
connectivity adds GPS capability to Windowsbased
or Mac computers. The CW19 supports
the NMEA 0183 standard for GPS device
communication for compatibility with GPS
enabled software.
CW19-NAV GPS Receiver
Features
Enables indoor use
-173 dBW acquisition and
-185 dBW tracking
Rapid Time To Fix
<2 second outdoors
Stand-alone CW19 Receiver
USB connectivity and
integrated antenna
Small Size
66mm x 52mm x 11.1mm
Block Diagram
Front
End
Filter
Clock
RF25IC
IF
Filter
BB25IC
RTC &