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Measurement imperfections impact on the performance of digitally predistorted power amplifiers
KTH, School of Electrical Engineering (EES), Signal Processing. University of Gävle, Sweden .ORCID iD: 0000-0001-8460-6509
2014 (English)Conference paper (Refereed)
Abstract [en]

This paper presents an study of the impact of analog to digital converter (ADC) impairments on digital pre-distortion (DPD) techniques when applied to RF power amplifiers (PA). The DPD technique is described by a memory polynomial model while the ADC impairments are modeled by quantization noise, random jitter, and the integral nonlinearity (INL); thus, summarizing systematic and random nature of ADC imperfect measurements. It is observed that increased jitter will have a negative impact on the modeling but not so much on the output performance from the pre-distorted PA. Moreover, the ENOB can be used as metric for both the quantization noise and integral nonlinearity and there is a value of ENOB which, if exceeded, do not improve the DPD performance; in this paper it is about 8 bits.

Place, publisher, year, edition, pages
2014. 230-233 p.
, Conference Record - IEEE Instrumentation and Measurement Technology Conference, ISSN 1091-5281 ; 6860742
Keyword [en]
Digital pre-distortion (DPD), Integral non-linearity (INL), jitter, Power amplifiers, quantization noise, Analog to digital conversion, Planning, Radio frequency amplifiers, Sustainable development, Analog to digital converters, Digital predistortion, Integral nonlinearity, Memory polynomial models, Output performance, Random jitters, RF power amplifiers
National Category
Signal Processing
URN: urn:nbn:se:kth:diva-167627DOI: 10.1109/I2MTC.2014.6860742ISI: 000346477200046ScopusID: 2-s2.0-84905716354ISBN: 9781467363853OAI: diva2:813883
2014 IEEE International Instrumentation and Measurement Technology Conference: Instrumentation and Measurement for Sustainable Development, I2MTC 2014, 12 May 2014 - 15 May 2014, Montevideo

QC 20150525

Available from: 2015-05-25 Created: 2015-05-22 Last updated: 2015-05-25Bibliographically approved

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