Title :
Analysis of spectral regrowth of weakly nonlinear power amplifiers
Author_Institution :
Sch. of Electr. & Comput. Eng., Georgia Inst. of Technol., Atlanta, GA, USA
Abstract :
Power amplifiers (PAs) are important components in a wireless communications system. Linearity and efficiency are two desirable but conflicting requirements, All PAs exhibit varying degrees of nonlinearity which causes spectral regrowth and adjacent channel interference. Based on the behavior model of the PA and statistics of the input, it is possible to analyze spectral regrowth in the output. Existing results assume that the input is Gaussian whereas our analysis does not. Analytical results on spectral regrowth are useful in finding optimal operating conditions of the PA so that maximum efficiency is achieved without violating the out-of-band emission requirement.
Keywords :
adjacent channel interference; higher order statistics; power amplifiers; radio equipment; radiofrequency amplifiers; spectral analysis; adjacent channel interference; linearity; maximum efficiency; optimal operating conditions; out-of-band emission requirement; spectral regrowth; statistics; weakly nonlinear power amplifiers; wireless communications; Autocorrelation; Batteries; Interchannel interference; Linearity; Power amplifiers; Power measurement; Radio spectrum management; Spectral analysis; Statistical analysis; Statistics;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/4234.892201
