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| SkyTraq Bluetooth Receivers with AGPS - Testing and Available ! |
Posté le 11 septembre 2007 à 17:46:00 par gpspassion. EN - Hardware
Source : Gpspassion
Updated September 11th, 2007
While some GPS chipsets take a long time to become available in consumer systems, others take the fast lane. This happened in 2006 for the MTK chipset and 2007 sees a repeat for the recently "discovered" SkyTraq high-sensitivity chipset. There are likely many reasons for this, but in both cases there is one standout feature, the MTK had high sensitivity with a long battery life and the Skytraq high sensitivity and Offline AGPS (Assisted GPS) a first on a Bluetooth GPS receiver.
I received Wondeproud BT100Y and BT760Y test units (available at Semsons for $60 and $65 respectively) last week and have been putting them through their paces. AGPS works as advertised with the Warm TTFF (time to first fix) down to about 5 seconds instead of the usual 30 seconds. High sensitivity is there too, but tracking can probably still be fine tuned.
Join the SkyTraq Based Receivers topic for more details and user feedback.
Posted June 13th, 2007 - While some GPS Chipset designers are being bought, Globallocate by Broadcom on June 12th (PR) or NordNav by CSR on January 15th (see PR), new designers are appearing. We had MTK in 2006, see this article and 2007 is bringing us SkyTrak. Litte is known about this new SkyTraq Venus 5 chipset so far other than with its -159dBm sensitiviy rating, it joins the ranks of the "high sensitivy"...
 ... chipsets (SiRFstarIII, uBlox4, MTK, GL Hammerhead, Nx3 - in order of appearance) with a record number of channels at 44, likely for acquisition and fewer for tracking.
The first GPS receiver with the Venus 5 will apparently be the WondeProud BT100Y whose battery life rating of 17 hours for a 950mAh battery shows that this is fairly frugal chipset. Stay tuned for a review of this receiver on GpsPasSion in the coming weeks, in the meantime you can use this thread of the forums to discuss.
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