Generate GPS signal in MATLAB?

Hi everything,

Is it possible to generate GPS signal in MATLAB? I know nothing about the signal structure of the GPS signal. Is there a GPS toolbox that can do this?

Once I get the IQ samples of the GPS signal, then I plan to actually transmit the signal over the air to a phone.

Thanks

Kevin

[Rik]

Do you mean you want to spoof a GPS signal? Or do you want to generate a GPS track? I'm not sure the former would even be legal.

[Walter Roberson]

Generating a GPS signal can be legal: placing a land-based GPS broadcast unit at a fixed location can help get higher resolution, which can be very useful in cases where precision is important, such as ship navigation in reefs, or in measuring land shift due to earthquakes or plate tectonics.

I have no idea what the process is to get an installation such as that approved, though.

[Kevin]

I think you guys are thinking too highly of me. I don't have the money nor ambition to put up a transmit antenna to transmit GPS signal (either to do good or bad to general public).

[Sakina Jafferi]

How to generate a GPS signal in MATLAB?

what steps should be followed to write a code for it...???

[Walter Roberson]

https://www.mathworks.com/products/connections/product_detail/navsys-gps-data-analysis-tools.html

Answer 1

[Kevin]

Hmm, I have not thought about the legal matter.

Yes, I want to spoof a GPS signal. What if I just do it in a basement and the tx power is very low and so it won't affect anyone outside the house. The tx power is so low that I don't think a phone in the ground floor will even get affected.

[S Joshi]

Hey Kevin,

Did you end up finding an answer for this? I'm not interested in doing an over-the-air experiment, but I'd be interested in simulating to first order a GPS signal.

[Kevin]

No. No one posts an answer.

Answer 2

[Imtiaz nabi]

Hi Kevin, did you manage to execute the GPS/GNSS spoofing algorithm? and conducted the experiement?

Answer 3

[Markandeya Janaswamy]

There is Satellite Communications Toolbox in MATLAB that supports GPS waveform generation, Receiver acquisition and tracking, and receiver position estimation simulation from a simulated GPS signal.