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osqzss / gps-sdr-sim

Software-Defined GPS Signal Simulator
MIT License
2.85k stars 787 forks source link

No fix outside but fix inside #232

Open whiteman04 opened 4 years ago

whiteman04 commented 4 years ago

Hello, I have a bladerf x40 and I am using the GPS SDR sim to transmit GPS Spoofing. Inside my house and without GPS real signal the simulator works fine and I dont have any problem to take fix on my GPS reciever or on my smartphone. But when I go outside my house with GPS real signals the simulator doesnt work good. When I start the transmission both recievers lose their localisations and after few minutes the smartphone have a fake localisation but the other reciever dont have fix. Alredy try creat the bin file with more reciencly ephemerics data. Change txvga1 to lower power and nothing work. The reciever never take fix with GPS SDR sim when I go outside.

atchyuth-rao commented 3 years ago

in GPS Receiver cold start option is there, you need to click on cold start button to clear the old ephemeris data.

i am trying to test gps sdr sim on mobile phones, my phone getting satellites some times and not getting satellites most of the time.

what should i do to get satellites always for mobile phone, any suggestion thanks in advance