A novel DSP architecture of adaptive feedforward linearizer for RF amplifiers

Author

Yuanxun Wang ; Fredrick, J.D. ; Itoh, T.

Author_Institution

Dept. of Electr. Eng., California Univ., Los Angeles, CA, USA

Volume

2

fYear

2001

fDate

20-24 May 2001

Firstpage

805

Abstract

A novel adaptive design for feedforward amplifier linearizer with DSP control is proposed in this paper. Compared to existing adaptive architectures, this is a "blind" design which does not require pilot signal and intentional signal perturbation and phase calibration. A polar gradient adaptive algorithm is developed to support the hardware architecture, providing the unconditional convergence during the full working range of the phase control components. The stability criterion is analyzed. The linearizer performance for multi-tones and for a CDMA signal is simulated and demonstrated using EDA design tools.

Keywords

UHF amplifiers; adaptive signal processing; circuit stability; feedforward; linearisation techniques; radiofrequency amplifiers; stability criteria; CDMA signal; DSP architecture; DSP control; EDA design tools; RF amplifiers; adaptive feedforward linearizer; convergence; multi-tones; phase control components; polar gradient adaptive algorithm; stability criterion; Adaptive algorithm; Adaptive control; Calibration; Convergence; Digital signal processing; Hardware; Programmable control; Radio frequency; Radiofrequency amplifiers; Signal design;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest, 2001 IEEE MTT-S International

Conference_Location

Phoenix, AZ, USA

ISSN

0149-645X

Print_ISBN

0-7803-6538-0

Type

conf

DOI

10.1109/MWSYM.2001.967014

Filename

967014