Title :
Correlation techniques for estimation of amplifier nonlinearity
Author :
Li, M.Y. ; Galton, I. ; Larson, L.E. ; Asbeck, P.M.
Author_Institution :
California Univ., San Diego, La Jolla, CA, USA
Abstract :
Nonlinearity characterization is critical to amplifier linearization. It is shown that correlation techniques can be used to provide an estimate of amplifier nonlinearity. The output envelope is cross-correlated with a test sequence generated by forming the product of multiple uncorrelated input sequences, to yield estimates of the low order nonlinearity coefficients. The proposed method can be employed in the background during amplifier operation to estimate amplifier nonlinearity with IS-95 forward-link CDMA signals.
Keywords :
code division multiple access; correlation methods; mobile radio; nonlinear estimation; nonlinear network analysis; parameter estimation; power amplifiers; IS-95 forward-link CDMA signals; amplifier linearization; amplifier nonlinearity estimation; correlation techniques; mobile radio; multiple uncorrelated input sequences; power amplifiers; test sequence; Character generation; Distortion measurement; Linearity; Multiaccess communication; Operational amplifiers; Polynomials; Power amplifiers; Power measurement; Signal generators; Testing;
Conference_Titel :
Radio and Wireless Conference, 2004 IEEE
Print_ISBN :
0-7803-8451-2
DOI :
10.1109/RAWCON.2004.1389102
