Title :
On the baseband representation of a bandpass nonlinearity
Author :
Zhou, G. Tong ; Qian, Hua ; Ding, Lei ; Raich, Raviv
Author_Institution :
Sch. of Electr. & Comput. Eng., Georgia Inst. of Technol., Atlanta, GA, USA
Abstract :
Modeling, analysis, and compensation of nonlinearities in the transmitter (the power amplifier, in particular) has attracted a lot of attention recently. Given the same bandpass polynomial or Volterra representation of the nonlinear system, two different baseband formulations have appeared in the literature. The purpose of this correspondence is to examine the discrepancy between the two and to affirm that proper conjugation must be applied in the baseband representation of bandpass nonlinearities. A predistortion linearization test-bed experiment is conducted to illustrate the concepts.
Keywords :
Volterra series; band-pass filters; microwave amplifiers; nonlinear systems; polynomials; power amplifiers; signal representation; Volterra representation; bandpass nonlinearity; bandpass polynomial; baseband representation; communication system nonlinearity; nonlinear circuit; nonlinear system; polynomial; power amplifier; predistortion linearization; Algorithm design and analysis; Baseband; Chebyshev approximation; Digital filters; Finite impulse response filter; Function approximation; Least squares approximation; Power amplifiers; Signal processing; Signal processing algorithms; Communication system nonlinearities; Volterra series; nonlinear circuits; polynomials; power amplifiers;
Journal_Title :
Signal Processing, IEEE Transactions on
DOI :
10.1109/TSP.2005.850383
