Re: software gps

Hi Ayse,

You may need a DAQ card, a GPS RF front-end, and 
a decent PC. Try SiGe, Maxim, STMicro, or any other
GPS chip makers to get an evaluation board of their
RF front-end chip. Many RF front-end chips have an
IF bandwidth of 2MHz to 8MHz for GPS L1 C/A code.
The IF signal will then be sampled by an onboard 
1-bit/2-bit ADC at 5MHz to 16MHz. So your DAQ card
needs at least 20MHz sampling rate. NI has a good 
collection of DAQ cards though they are a bit pricey.

I got an SE4100 GPS IC board from SiGe and an MI7005
PCI digital I/O card from Data Quest Solutions. 
You could easily port the Matlab files in Tsui's 
"Fundamentals of Global Navigation System Receivers:
A Software Approach" into C/C++. Try FFTW library
to get the best FFT performance.

Enjoy,

Tak


--- Ayse Sayan <[email protected]> wrote:

>  
> 
> Hello, I want to build a software gps receiver. If
> anybody can help I ‘d be very pleased..
> 
> Thanks...
> 
> Ayse
> 
>  
> 
> PS: I have some fund for this from my university
> which I need to use till the end of November, so any
> help concerning commercial hardware components will
> be very helpful!
> 
>  



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