Title :
Nonlinearity estimation and spectral regrowth prediction of power amplifiers using correlation techniques
Author :
Li, M.Y. ; Galton, I. ; Larson, L.E. ; Asbeck, P.M.
Author_Institution :
California Univ., San Diego, La Jolla, CA, USA
Abstract :
Nonlinearity estimation and spectral regrowth prediction are crucial to power amplifier linearization. The correlation techniques shown here can estimate amplifier nonlinearity and predict out-of-band power spectrum. Cross-correlation is performed between the output envelope and a test sequence generated from the input signal and can be carried out in background during amplifier operations. The proposed method is applicable to multi-channel DS-CDMA systems and IS-95 forward-link CDMA signals are employed as an example.
Keywords :
code division multiple access; correlation methods; nonlinear estimation; power amplifiers; radiofrequency amplifiers; spread spectrum communication; telecommunication channels; IS-95 forward-link CDMA signals; correlation techniques; multichannel DS-CDMA systems; nonlinearity estimation; out-of-band power spectrum; power amplifiers; spectral regrowth prediction; Baseband; Binary sequences; Multiaccess communication; Operational amplifiers; Power amplifiers; Power measurement; Testing;
Conference_Titel :
Wireless and Microwave Technology, 2005. WAMICON 2005. The 2005 IEEE Annual Conference
Print_ISBN :
0-7803-8861-5
DOI :
10.1109/WAMIC.2005.1528369
