A novel DSP architecture of adaptive feedforward linearizer for RF amplifiers

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 ada...

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Bibliographic Details
Main Authors: Yuanxun Wang, Fredrick, J.D., Itoh, T.
Format: Conference Proceeding
Language:English
Subjects:
Adaptive algorithm
Adaptive control
Calibration
Convergence
Digital signal processing
Hardware
Programmable control
Radio frequency
Radiofrequency amplifiers
Signal design
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Description
Summary: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.
ISSN:0149-645X
2576-7216
DOI:10.1109/MWSYM.2001.967014