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osqzss / gps-sdr-sim

Software-Defined GPS Signal Simulator
MIT License
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Transmit data with PlutoSDR but no signal #369

Open John132-LI opened 1 year ago

John132-LI commented 1 year ago

I follow the instructions to build the project on Ubuntu 20.04. Then create "gpssim.bin" and try to transmit to Pluto SDR via "plutoplayer". Command lines are shown as: ./gps-sdr-sim -e brdc0360.23n -l 1.378898,103.807031,100 -d 300 -s 4000000 ./plutoplayer -t gpssim.bin -a -80.0 -b 5.0

Everything seems fine and the console shows "Transmit starts" but when I use "GPS test" to check the sinal , no satellite is found(Andorid,only on Plane mode) I don't know if the device is transmitting or not. Anyway to trace it? How could I find out If something goes wrong ? Any help would be sincerely appreciated :)

vxling commented 1 year ago

I checked with UBlox, it received signals but the data invalid.

vxling commented 1 year ago

Have you replaced the TXCO on Pluto?

osqzss commented 1 year ago

@John132-LI The original XO on the PlutoSDR board has a very large frequency offset. You need to supply more stable external clock input or replace it to a TCXO. https://s-taka.org/en/plutosdr-tcxo-upgrade/

John132-LI commented 1 year ago

Thanks for your help. 👍 It turns out that the TX1 channel goes wrong. I get rid of it and finnally receive signal. But when I try another test, this error occurs:

* Transmit starts... ERROR: READ LINE: -32 Error pushing buf -32 Done. ERROR: READ LINE: -32 ERROR: READ LINE: -32 What's happening?

DanishAliChanna commented 7 months ago

hello John132-LI

how you solved your problem? i am facing same issue as yours? it appears transmit starts but then no output has shown.

John132-LI commented 7 months ago

hello John132-LI

how you solved your problem? i am facing same issue as yours? it appears transmit starts but then no output has shown.

@DanishAliChanna Hi,thanks for you reply. My problem is that there was a wrecked capacitor on the motherboard. It took me a few days to find that. So I replaced it with a new one then everything went fine! Unfortunately it's been more than half a year and I've forgotten the details. But I assure that using "Player.c" is the easiest way to create the ouput signal. May all go well with you！

DanishAliChanna commented 7 months ago

Hello dear, Thank you for your reply. actually i want to ask you, have you modified TCXO in plutoSDR for transmitting gps signals? i have read the thread that the owner was saying to update this. I am stuck with this problem. can you please help me out to get rid of this issue. since last month i am struggling with this. can you send me the default setup of your project? or can you give me your whatsapp or any other kind of contact so i can discuss with you on this topic. to be very honest i am not going to take your long time i just want your 5 minutes to discuss the default setup of this project.

thank you once again for your kind response, i am waiting to hear from you.

regards

On Mon, Nov 20, 2023 at 5:17 PM John132-LI @.***> wrote:

hello John132-LI

how you solved your problem? i am facing same issue as yours? it appears transmit starts but then no output has shown.

@DanishAliChanna https://github.com/DanishAliChanna Hi,thanks for you reply. My problem is that there was a wrecked capacitor on the motherboard. It took me a few days to find that. So I replaced it with a new one then everything went fine! Unfortunately it's been more than half a year and I've forgotten the details. But I assure that using "Player.c" is the easiest way to create the ouput signal. May all go well with you！

— Reply to this email directly, view it on GitHub https://github.com/osqzss/gps-sdr-sim/issues/369#issuecomment-1818519266, or unsubscribe https://github.com/notifications/unsubscribe-auth/BEAAH4P4VKSRQRBEX3OVONDYFMN2PAVCNFSM6AAAAAAWZ6BVMWVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMYTQMJYGUYTSMRWGY . You are receiving this because you were mentioned.Message ID: @.***>

Rupak910 commented 5 months ago

I follow the instructions to build the project on Ubuntu 20.04. Then create "gpssim.bin" and try to transmit to Pluto SDR via "plutoplayer". Command lines are shown as: ./gps-sdr-sim -e brdc0360.23n -l 1.378898,103.807031,100 -d 300 -s 4000000 ./plutoplayer -t gpssim.bin -a -80.0 -b 5.0

Everything seems fine and the console shows "Transmit starts" but when I use "GPS test" to check the sinal , no satellite is found(Andorid,only on Plane mode) I don't know if the device is transmitting or not. Anyway to trace it? How could I find out If something goes wrong ? Any help would be sincerely appreciated :)

hello john132-LI

i am also using pluto sdr. But i cant transmit the signal. It is saying plutoplayer is not recognised. As you have already used it, can you help me out with what i should do here.