Comparison of single- and double-sided pulse width modulated signals with non-linear predistortion
Morrison, Christopher and Weiss, Stephan and Macleod, Malcolm and Stewart, Robert (2012) Comparison of single- and double-sided pulse width modulated signals with non-linear predistortion. In: 5th European DSP in Education and Research Conference, 2012-09-13 - 2012-09-14.
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Abstract
Class D amplifiers are based on a low-bit pulse width modulated (PWM) signal reconstructed through the lowpass characteristic of the loudspeaker. To create a PWM signal, a non-linear conversion from a standard pulse code modulated (PCM) signal has to be performed. The non-linear distortion created in this conversion process can be minimised by non-linear predistortion based on a Wiener-Hammerstein system. In this paper, we compare single and double-sided PWM conversion, whereby the former exhibits a higher resolution but also higher non-linearity compared to the latter. The trade-off between both approaches in creating a highly linear high performance class D audio amplifier is demonstrated by means of simulations and an implementation.
Creators(s): |
Morrison, Christopher, Weiss, Stephan ![]() ![]() | Item type: | Conference or Workshop Item(Paper) |
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ID code: | 44253 |
Keywords: | single and double sided pulse width modulated signals, pulse width modulated signals, non-linear predistortion, Electrical engineering. Electronics Nuclear engineering, Electrical and Electronic Engineering |
Subjects: | Technology > Electrical engineering. Electronics Nuclear engineering |
Department: | Faculty of Engineering > Electronic and Electrical Engineering Technology and Innovation Centre > Sensors and Asset Management |
Depositing user: | Pure Administrator |
Date deposited: | 01 Jul 2013 11:14 |
Last modified: | 20 Jan 2021 14:47 |
Related URLs: | |
URI: | https://strathprints.strath.ac.uk/id/eprint/44253 |
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