Hi Anish,there's been a Summer project that implemented and compensated nonlinear distortion. Simple amplifier models are covered.
https://summerofcode.withgoogle.com/archive/2020/projects/5862185634365440 https://github.com/gnuradio/gr-dpd You'll want to start by reading Alekh's proposal; it was pretty nice.The model that you illustrate in your flow graph doesn't quite mathematically work out; I think you'll want to look into Volterra series if you want to learn about a more general modelling for nonlinear elements. For a more specifically useful short introduction to nonlinear amplifier modelling, see the MP and GMP documentation in the github link above.
Best regards, Marcus On 25.01.22 20:23, Anish Mangal wrote:
Hi,How should I go about modeling the distortion introduced by a class-B amplifier stage that clips the signal when its value is below zero?Example:I want to combine two FM modulated signals, pass them through this "class-B distorter", demodulate them, and analyze the quality of the signal produced (compared with the undistorted one).How should I go about doing it. Created the flowgraph attached, but this is obviously wrong. :) -- Anish
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