So several comments:
1) It's very possible your signal is too strong. IIRC, GPS signals are
usually around -150 to -160 dBm at the receiver. The HackRF can transmit at
about +10 dBm. That is SIGNIFICANTLY stronger than most GPS receivers
expect.
2) BE VERY CAREFUL ABOUT TRANSMITTING GPS SIGNA
Perhaps this helps. A few years ago I needed to test GPS receivers inside a
building. I used a GPS repeater to bring the satellite signal indoors. It
worked very well and was easy to setup. Just Google “GPS signal repeater”
Jay.
> On Jul 9, 2020, at 1:59 PM, John Akin wrote:
>
> I am working
When I did this, I found that phones are harder to trick than a regular
GPS. Are you trying a navigation GPS?
If you are using only smartphones, the signal may be going out, but
whatever logic the phone is using (possibly the presence of WLAN
networks) deems the data unreliable and doesn't us
Do not transmit these tests to the air, use some kind of faraday cage
Also, GPS receivers normally power the antenna and I am not sure how
much the HackRF will like a 5v supply on the antenna port, you need to
isolate the circuits.
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