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| Single Feedback Predistortion Linearization Method for RF Power Amplifier |
| Zhan Peng① Qin Kai-yu① Cai Shun-yan② |
①(Institute of Astronautics and Aeronautics, University of Electronic Science and Technology of China, Chengdu 611731, China)
②(Institute of Physics and Electronic Information, China West Normal University, Nanchong 637002, China) |
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Abstract Based on memory polynomial model, this paper proposes a new RF power amplifier predistortion linearization method using single feedback, which only needs the in-phase or quadrature component of the quadrature demodulated IQ signal, and it also can acquire the model parameters of predistorter. This method can eliminate the gain and phase imbalance problems caused by quadrature demodulator, and one feedback sampling circuit is saved, which can reduce the costs, simplify the system design, as well as improve the predistortion linearization performance. Simulation and experiment results show the correctness of the proposed method, which can achieve satisfied linearization performance.
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Received: 06 December 2010
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Corresponding Authors:
Zhan Peng
E-mail: zhanp324@163.com
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2011, Vol. 33 
