Good Afternoon - Has anyone successfully decoded GPS signals using a HackRF without an external clock?
I've been trying to acquire GPS signals with my HackRF to no avail. I am using an active GPS antenna with the antenna power enabled and amplifier on. I've tried sample rates of 4MSPS and 10MSPS along with using a 2MHz baseband filter. I've also tried offsetting the center frequency to shift the DC spike. Acquiring an external 1PPM TXCO is next on my list of things to do. I've also tried using gnss-sdr's front-end-cal to calibrate but I can't acquire any satellites to calibrate against. I am able to recover the chipping rate, ie http://sdrgps.blogspot.com/2016/02/find-signal-in-noise.html Thanks, Philip Hahn
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