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A Low-rate identification method for digital predistorters based on Volterra kernel interpolation

Singerl, P. and Koeppl, H. (2007):
A Low-rate identification method for digital predistorters based on Volterra kernel interpolation.
In: Analog Integrated Circuits and Signal Processing, 56 (1-2), pp. 107-115. Springer, [Article]

Abstract

RF power amplifiers (PA) of wireless communication systems are usually driven in their nonlinear region to obtain a higher efficiency. The price paid for the increased efficiency is the distortion of the transmission signal. To fulfil a given spectral mask for the transmission signal and to avoid an unacceptable high bit-error rate on the receiver side, the amplifier must be linearized. It is well known that nonlinear system identification (PA or predistorter) can be accomplished on the Nyquist-rate regarding the input signal bandwidth. However for predistortion applications, systems operating on the output signal Nyquist-rate are required. In this paper we show how such predistortion systems can be obtained by a multi-dimensional Volterra kernel interpolation where the kernels are estimated on a Nyquist-rate regarding the input signal, without the demand for an expensive high sampling rate analog to digital converter (ADC).

Item Type: Article
Erschienen: 2007
Creators: Singerl, P. and Koeppl, H.
Title: A Low-rate identification method for digital predistorters based on Volterra kernel interpolation
Language: German
Abstract:

RF power amplifiers (PA) of wireless communication systems are usually driven in their nonlinear region to obtain a higher efficiency. The price paid for the increased efficiency is the distortion of the transmission signal. To fulfil a given spectral mask for the transmission signal and to avoid an unacceptable high bit-error rate on the receiver side, the amplifier must be linearized. It is well known that nonlinear system identification (PA or predistorter) can be accomplished on the Nyquist-rate regarding the input signal bandwidth. However for predistortion applications, systems operating on the output signal Nyquist-rate are required. In this paper we show how such predistortion systems can be obtained by a multi-dimensional Volterra kernel interpolation where the kernels are estimated on a Nyquist-rate regarding the input signal, without the demand for an expensive high sampling rate analog to digital converter (ADC).

Journal or Publication Title: Analog Integrated Circuits and Signal Processing
Journal volume: 56
Number: 1-2
Place of Publication: Cincinnati, OH, USA
Publisher: Springer
Divisions: 18 Department of Electrical Engineering and Information Technology
18 Department of Electrical Engineering and Information Technology > Institute for Telecommunications > Bioinspired Communication Systems
18 Department of Electrical Engineering and Information Technology > Institute for Telecommunications
Date Deposited: 04 Apr 2014 11:41
Official URL: http://link.springer.com/article/10.1007/s10470-007-9074-4/f...
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