Models for Representing Nonlinear Distortions — Lesson 1

This lesson covers the linearization techniques for non-linear distortion and memory effects in solid-state power amplifiers. The lesson also explains the effects of power amplifier nonlinearity, such as adjacent channel spectrum leakage and signal distortion. It further discusses the need for linearization techniques to combat these unwanted effects. The lesson concludes with an exploration of parametric models like the Saleh, Rapp, and Ghorbani models, which can be used to analyze system-level performance for various communication schemes.

Video Highlights

00:18 - Electrical and thermal memory effects
04:39 - Adjacent channel spectrum leakage, signal distortion and linearity
09:27 - Saleh model (Proposed for TWTA)
12:20 - Curve fitting procedure for saleh model
19:00 - Rapp model
21:04 - Ghorbani model

Key Takeaways

- Power amplifiers, especially solid-state power amplifiers, introduce non-linear distortion and memory effects.
- Non-linear distortion and memory effects can cause adjacent channel spectrum leakage and signal distortion.
- Linearization techniques are necessary to combat the unwanted effects of power amplifier nonlinearity.
- Parametric models like the Saleh, Rapp, and Ghorbani models can be used to analyze system-level performance for various communication schemes.