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Digital Predistortion for ODR-DabMod
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This folder contains work in progress for digital predistortion. It requires:
- USRP B200.
- Power amplifier.
- A feedback connection from the power amplifier output, at an appropriate power level for the B200.
Usually this is done with a directional coupler.
- ODR-DabMod with enabled dpd_port, and with a samplerate of 8192000 samples per second.
- Synchronous=1 so that the USRP has the timestamping set properly, internal refclk and pps
are sufficient for this example.
- A live mux source with TIST enabled.
See dpd/dpd.ini for an example.
TODO
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Implement a PA model that updates the predistorter.
Implement cases for different oversampling for FFT bin choice
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