fpgapro wrote:Hi, i'm having the same problem with GN3S v2. I've changed fs to 8183800, IF is 38400 Hz, the rest is as default (except 12 channles, ischar...) but I'm not able to acquire any satellites. I've used 2 diff antennas and checked signal with Magellan GPS. Did You find something new.
We have been experiencing a probable malfunctioning of the SiGe GN3S Sampler v2: data seem properly acquired (no SW errors), but no satellite acquisition has been ever performed by using our SiGe Sampler.
Last month (sep 11) we have purchased a SiGe GN3S Sampler v2 from Sparkfun together with the antenna advertised on the same page.
We have been using the matlab code from "A software-defined GPS and Galileo Receiver- A single frequency approach" (Kai Borre) both on a Windows 7 and Windows XP machine
For SiGe version 2 we replaced the .m files contained in the SDR with the updated ones downloaded by the GNSS web site of Colorado University for the processing of the I/Q data and we used the parameters indicated on the same web site : (in order to validate this SW, we have also generated a proper sample IQ file and the SDR properly acquired the GPS satellites we had coded into the IQ file).
Sampling frequency : 8.1838 MHz
Intermediate frequency : 38.400 KHz
Again, all the software runs smooth but no satellites have ever been acquired in a clear sky view (i.e. no trees, no buildings, at Rome-Italy latitude) and the University of Colorado still did not provide any hint to solve the problem.
I noticed you have experienced a similar issue; did you manage to fix it?