SiRFstar III

SiRFstarIII is a range of high sensitivity GPS microcontroller chips manufactured by SiRF Technology. [ [http://www.sirf.com/products/GSC3LPProductInsert.pdf SiRFstarIII GSC3e/LP & GSC3f/LP Product Overview.] SIRF.com. February 2007, Rev. 1.2] [ [http://www.fujitsu-siemens.co.uk/rl/servicesupport/techsupport/pda/General/SiRFstarIIIGSCf%5B1%5D.pdf SiRFstarIII(TM) GPS Single Chip. High Performance GPS in a Small Form Factor.] November 2004] GPS microcontroller chips interpret signals from GPS satellites and determine the position of the GPS receiver.

Features

for example), largely due to its ability to acquire and maintain a signal lock in urban or densely covered forest environments, and its faster Time to First Fix (TTFF), the time it takes for a GPS receiver to lock onto the satellite signals and determine the initial position. The enhanced abilities of the SiRFstarIII chips are made possible by several features:

*A 20 channel receiver, which can process the signals of all visible GPS and WAAS satellites simultaneously.
*The chip consumes 62 mW of power during continuous operation.
*Assisted GPS can reduce TTFF to less than two seconds. This makes the chip useful for cell phone manufacturers supporting location services (such as the E911 legislation in the United States).
*Receiver sensitivity of -159 dBm while tracking; GPS receivers based on this chipset have routinely performed better than receivers based on other chipsets. [ [http://www.gpspassion.com/fr/articles.asp?id=143 GPS Chipsets and Receivers Compared] . gpspassion.com] Reviewers have praised the SiRFstarIII chipset for its superior sensitivity and tracking capabilities. [ [http://www.pocketgpsworld.com/apos626btreceiver.php APOS-TEC GPS-626 SiRF III BT receiver review] . POCKETGPSWORLD.com]

Manufacturers using SiRF III chipsets

Several manufacturers produce GPS receivers equipped with the SiRF III chipset. The following manufacturers produce headless, automotive, and handheld models utilizing SiRF III:
* Acer
* Antenova
* Asus
* Audiovox
* BlueNext
* Cowon
* E-ten
* Eonon
* Fastrax
* Fujitsu-Siemens
* Falcom
* Garmin
* GlobalSat
* GlobalTop
* Holux
* HTC
* Hitachi
* Invion
* Leadtek
* L1 Technologies
* LG
* Magellan Navigation
* Microsoft
* Mio Technology
* Mobile Devices
* Motorola
* MWg
* Navigon
* Navman
* Nesavision (Nesa)
* [http://nextar.com Nextar]
* Node
* Nokia
* OmniTech
* Packard Bell
* Pharos
* Polar Electro
* Power Acoustik
* Royaltek
* Samsung
* Satmap Systems
* Sony
* TomTom
* Visco

References

External links

* [http://www.sirf.com/products/gps_chip.html SiRFstarIII product web page]
* [http://www.garmin.com/pressroom/corporate/083005.html Garmin SiRF info]