Re: [Discuss-gnuradio] GPS Implementation

[David Bengtson]

address@hidden wrote:
> Hello,
> my name is Marco Gallo and I am quite new to the forum. I am interested in SDR 
> development specially reguarding the GPS application.
> I would like to know if it is possible to use mobile phones' ADC for converting 
> GPS signals for evaluatic static position only.
> I do not know if it is possibile for an external application to use mobile 
> phone component such as ADC; in case it is possible I do not know if mobile 
> phone ADC can process GPS signal. Since mobile phone networks work with 900 an 
> 1800 MHZ band I thought it could process also GPS, but I did not find any 
> documentation reguarding phones architecture and specifications. Is there 
> anybody who could help me to undestand?
>
> Thank you in advance,
> Greetings
>
> Marco 

Hi Marco:

While you may be able to use just the ADC in a GPS receiver, the rest of 
a mobile phone receiver can't be used for a GPS Receiver. GPS is at 1.6 
GHz, and the mobile phone allocations are either 800 MHz or 1.8 to 1.9 
GHz. Mobile phones are very specialized, and use filters and frequency 
planning to only receive the Mobile phone signals.

The phones that do support GPS location may not have the information 
available on the phone, the network may actually do the location 
calculations.

You might want to look at the open source GPS page here

http://gpstk.sourceforge.net/

and do some poking around.

Dave Bengtson
www.keystoneradio.com