GPS vs. aGPS

satellite Many high-end cell phones now come with GPS. Some come with aGPS. What’s the difference? WMExperts explains in this tutorial.

Basically, the “a” is for “assisted.” As the tutorial explains, often cellular network towers have GPS receivers. Those receivers are constantly pulling down satellite information and computing the data. This data is then passed on to the cellular phone on request. Thus, your cell phone doesn’t have to identify satellites and make GPS computations because it’s already been done. This makes your cell phone’s GPS faster and saves its battery, which GPS is known to drain.

So far so good. But as the tutorial explains, how aGPS is implemented differs with carriers. For example, AT&T only recently enabled aGPS. Since I’m an AT&T wireless customer, that’s cool.

7 Responses to “GPS vs. aGPS”


  • HI

    I am durga Prasad working on Windows Mobile testing i want to test AGPS in India can you just send me the AGPS settings requird for Windows mobile application.

    Just mail me the settings to prasadktr@gmail.com

    Thanks in Advance

    Durga Prasad

  • HI ,

    Thats right if the base station is in sync with GPS then it saves the toruble for mobile phones . The main reason for AGPS was the CDMA base stations if syncronized to the same clock (i,e GPS) it makes timing sync easier and the major reason causes less interference . For this you need to get into orthogonal codes . This much info is sufficient for now .

    cheers

  • When buying Cellphone Batteries make sure that you are not getting those chinese fakes and knockoffs.`,-

  • GPS is very useful specially the ones that are put on the Car dashboard. it can really help you drive on unfamiliar places.`”:

  • GPS is very useful specially the ones that are put on the Car dashboard. it can really help you drive on unfamiliar places.“,

  • GPS is really needed for vehicles and also for some recreational purposes like in camping if you do not want to get lost.”`”

  • GPS is really a heaven sent gadget, you can always pinpoint your exact location wherever you are *;.

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