I'm wondering if there are any low cost SDR Satellite Channel Emulators.
I'm looking at emulating the Doppler Shift for VHF & UHF frequencies as seen by ground stations that don't dynamically tune. In this instance the ground stations have a fixed central frequency.
Has anybody tried using a HackRF to emulate Doppler Shift? Probably for something like GPS and or GNSS?
This:
https://greatscottgadgets.com/hackrf/
versus:
http://www.izt-labs.de/en/products/kategorie/rf-channel-simulators/produkt/satellite-link-emulator/
https://greatscottgadgets.com/hackrf/
http://www.izt-labs.de/en/products/kategorie/rf-channel-simulators/produkt/satellite-link-emulator/
Boards similar to the enclosed details are available from many manufactures.You have to customize the software with aid of Matlab plug ins.
Generally the GNSS Simulators like those obtained from professional companies like Spirent Communications which are actually GNSS Emulators have the capability to emulate the satellite signals for GPS and in this process they also emulate the exact Doppler frequency which is perceived by receivers or ground stations in the generated signals. One can also develop a hardware controlled by software for generating these effects. It remains on what is the actual need. Hope it helps.
Thank you for your help.
So far I'm attempting to emulate the Doppler shift associated with satellites in LEO so I can see how different receivers will interoperate. So far I haven't found anyone else working on this. I was hoping others had started experimenting with similar equipment in field of study.
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