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Cartesian Pre-distortion using a Sigma Delta Modulator for Multi-Standard RF Power Amplifiers

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Finnerty, Keith, Dooley, John and Farrell, Ronan (2012) Cartesian Pre-distortion using a Sigma Delta Modulator for Multi-Standard RF Power Amplifiers. In: 23rd Irish Signals and Systems Conference, June 28-29 2012, Maynooth, Ireland.

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Abstract

The system implements a pre-distortion algorithm for a non-linear PA by placing a pseudo static forward model of a PA in the feedback path of a Sigma Delta Modulator. Performing the predistortion in this way reduces the computation overhead incurred in calculating pre-distorter weights for a given power amplifier. In this paper a Cartesian LUT is used to represent the PA model, allowing the system to compensate for PA non-linearity caused by multiple signal standards. The system was tested using 3 modulation standards and showed improvement of up to 28dB while the PA model remained constant.

Item Type:	Conference or Workshop Item (Paper)
Additional Information:	This project is funded by the HEA under PRTLI5 and is being co-funded by the Irish Government and the EU under Ireland’s Structural Funds Programmes 2007-2013. The authors would also like to gratefully acknowledge this support of Science Foundation Ireland under grant number 08/CE/I1523.
Keywords:	Sigma Delta; Predistortion; Power amplifiers; Multi-standard;
Academic Unit:	Faculty of Science and Engineering > Electronic Engineering
Item ID:	3953
Depositing User:	Ronan Farrell
Date Deposited:	23 Oct 2012 14:54
Refereed:	Yes
Related URLs:	http://www.imws.nuim.ie http://www.issc.ie/
Use Licence:	This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here

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