Digital predistortion based on single-feedback method and indirect learning structure

Authors:
Shunyan Cai;Xianguo Tuo;Peng Zhan;Kaiyu Qin
Affiliations:
State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu, China 610059 and Department of Physics and Electronic Technology, Chengdu Nor ...;State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu, China 610059 and Key Laboratory of Nuclear Waste and Environmental Security, ...;The 10th Institute of China Electronics Technology Group Corporation, Chengdu, China 610036;School of Astronautics and Aeronautics, University of Electronic Science and Technology of China, Chengdu, China 611731
Venue:
Analog Integrated Circuits and Signal Processing
Year:
2013

Citing 4
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Abstract

This paper proposes a novel digital predistortion method for both memory and memoryless power amplifiers, which only needs one feedback circuit. In comparison with the previous methods, the proposed method has the greatest advantage that it can eliminate the gain and phase imbalance errors of the quadrature demodulator without digital IQ compensator, and the performance of digital predistortion can be improved with lower costs and less computation complexity. Combining with the indirect learning structure, it is easy to design the predistorter. Experimental results show the correctness and effectiveness of the proposed method.