[Gta04-owner] GTA04 hardware suggestion and discussions: GPS

Glenn Moeller-Holst glenn.mh.dk at gmail.com
Sat Feb 5 10:15:48 CET 2011


Here is some GPS suggestion for discussion:


BCM4750 datasheet:
http://www.datasheetpro.com/595932_view_BCM4750_datasheet.html
http://www.datasheetpro.com/595932_download_BCM4750_datasheet.html
Quote: "...
Real-time hardware correlator engine (fast acquisition and 
high-sensitivity) capable of tracking 24 satellites simultaneously
...
High-sensitivity, -157-dBm assisted acquisition sensitivity (with 
coarse time assistance) and -162-dBm tracking sensitivity, enabling 
indoor and deep urban operation
...
Autonomous cold start TTFF 30 s
..."


Broadcom - VoIP Android Tablet Support:
http://www.thesearethedroids.com/2010/02/09/broadcom-voip-android-tablet-support/
Quote: "...
As part of the Mobile World Congress demonstrations next week,
Broadcom is also showcasing Android support across a range of other
solutions including:
...
Multi-chip Android support in a consumer multimedia tablet device
based on the BCM11211 VoIP processor and leverages the BCM1181 for
multimedia processing, the BCM4329 for Bluetooth and Wi-Fi, and the
*BCM4750* for GPS.
..."


-

Wi2Wi:
http://www.wi2wi.com/navigation.php

Quote: "...
W2SG0006
...
-20 Channel, L1 Code
...
Acquisition Time (TTFF)
- Hot Start TTFF @ -136 dBm: 0.6 sec
- Hot Start TTFF @ -141 dBm: 0.9 sec
- Hot Start TTFF @ -146 dBm: 1.9 sec
- Cold Start TTFF at -136 dBm: 32.6 sec
- Reacquisition @ - 136 dBm: 100 msec
Receiver Sensitivity
- Minimum Acquisition Signal: -142 dBm
- Minimum Tracking Signal: -157 dBm
..."

Quote: "...
W2SG0084
...
48 Channel GPS Receiver Module Solution
...
- High sensitivity navigation engine (PVT) tracks as low as -163dBm
...
- Active Jammer Remover:
- Removes in-band jammers up to 80 dB-Hz
- Tracks up to 8 CW jammers
...
- Aquisition Time
Hot Start TTFF @ -136 dBm: 0.6 sec
- Reciever Sensitivy
Min. Acquisition Signal: -153 dBm
..."


Glenn


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