Title :
Simplified workfunction predistorter noise analysis
Author :
Nielsen, Troels S. ; Lindfors, Saska ; Larsen, Torben
Author_Institution :
RF Integrated Syst. & Circuits Div., Aalborg Univ., Denmark
fDate :
28 Aug.-2 Sept. 2005
Abstract :
This paper presents a simplified predistorter noise analysis. An average noise conversion gain is derived by linearizing the predistorter function around the envelope signal operating point and weighting it by the signal probability density function to embed signal statistics. The first order noise term is identified as the dominant noise contributor and used for deriving the noise power density. Internal predistorter bandwidth limitations are studied and an approach for including them in the analysis is outlined. The validity of the analysis is verified with system level simulations of a predistorter.
Keywords :
circuit simulation; integrated circuit noise; power amplifiers; statistical analysis; transfer functions; first order noise term; internal predistorter bandwidth limitations; noise conversion gain; noise power density; predistorter function; signal probability density function; signal statistics; system level simulations; workfunction predistorter noise analysis; Amplitude modulation; Circuits; Envelope detectors; Linearity; Phase modulation; Predistortion; Radio frequency; Radiofrequency amplifiers; Signal to noise ratio; Transfer functions;
Conference_Titel :
Circuit Theory and Design, 2005. Proceedings of the 2005 European Conference on
Print_ISBN :
0-7803-9066-0
DOI :
10.1109/ECCTD.2005.1523089
