Measurement imperfections impact on the performance of digitally predistorted power amplifiers
2014 (English)In: 2014 IEEE International Instrumentation and Measurement Technology Conference (I2MTC) Proceedings, 2014, 230-233 p.Conference paper (Refereed)
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.
Digital pre-distortion (DPD), Power amplifiers, Integral non-linearity (INL), quantization noise, jitter
Electrical Engineering, Electronic Engineering, Information Engineering
IdentifiersURN: urn:nbn:se:hig:diva-18893DOI: 10.1109/I2MTC.2014.6860742ISI: 000346477200046ScopusID: 2-s2.0-84905716354ISBN: 978-1-4673-6386-0OAI: oai:DiVA.org:hig-18893DiVA: diva2:784745
IEEE International Instrumentation and Measurement Technology Conference (I2MTC), MAY 12-15, 2014, Montevideo, URUGUAY