I just came across a problem in power amplifier used in communication chain which exhibits nonlinearity due to memory effects.This can be nullified with a help of digital pre-distortion using signal processing algorithms.
Can anyone please tell how it is achieved and explain the math part behind the algorithm?
Suggestion of book or a research article is preferred.
Thanks
Rakesh
wikipedia is a good source to start with (even if this page https://en.wikipedia.org/wiki/Predistortion is a bit short).
As your amplifier exhibits some transfer function, predistortion implements the inverse of this transfer function. Whether you do this using analog circuitry or implement it in the digital domain: this is a degree of freedom up to your choice. Both methods apply and have individual advantages as well as drawbacks.
Any 'good' book about signal theory should cover this topic so maybe you want to consult your local library.
Dear Rakesharma,
I suggest to you to see links and attached files in topics.
RFIC White Paper Series: Fundamentals of Power Amplifier Testing ...
www.ni.com › White Papers
Digital Predistortion Techniques for Mobile PA Test
www.highfrequencyelectronics.com/index.php?...digital-predistort...
pedro mirassol tomé analog neural predistortion of power amplifiers
dspace.cc.tut.fi/dpub/bitstream/handle/123456789/.../Tome.pdf?...
Adaptive DPD Design: A Top-Down Workflow - MATLAB & Simulink
https://www.mathworks.com/.../adaptive-dpd-design-a-top-down-...
Best regards
The amplifier memory issue is addressed here:
https://www.keysight.com/upload/cmc_upload/All/DigitalPreDistortion_MicroApps.pdf
A good place to start would be understanding the behavioral model first by any scholar book such as :
https://www.cambridge.org/core/books/rf-power-amplifier-behavioral-modeling/53306384B5A017F4BE2B05E9D2C097EC
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