volume | PIER Journals

2012-05-22

The Research and Application of Combining Lut and Memory Compensation for Twta Linearization with Relatively Low Sampling Frequency

Xin Hu,

Dr. Xin Hu

Research & Development (R&D) Center

China Academy of Launch Vehicle Technology

China

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Gang Wang,

Dr. Gang Wang

R&D Center for High Power Microwave Device

Institute of Electronics, Chinese Academy of Sciences

China

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Q.-L. Li,

Dr. Q.-L. Li

R&D Center for High Power Microwave Device

Institute of Electronics, Chinese Academy of Sciences

China

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Zi-Cheng Wang,

Dr. Zi-Cheng Wang

R&D Center for High Power Microwave Device

Institute of Electronics, Chinese Academy of Sciences

China

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Jirun Luo

Prof. Jirun Luo

Institute of Electronics, Chinese Academy of Science

China

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Progress In Electromagnetics Research C, Vol. 29, 177-190, 2012

doi:10.2528/PIERC12022105

Abstract

If sampling frequency is not high enough, the effect of adaptive memory polynomial predistortion linearizer is not very good for TWTA linearization. In order to keep the adaptive memory polynomial predistortion linearizer valid, usually the output power level of the TWTA must be reduced, which corresponds to a reduced efficiency of the TWTA. In this paper, we present a digital predistortion linearizer by combining LUT (Look-Up-Table) and memory-effect compensation technique, which may provide good linear performance with less reduction of the output power and relatively low sampling frequency. The results of simulations and experiments show that good linearity improvement can be reached for an X-band TWTA with this predistortion linearizer.

Citation

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Xin Hu, Gang Wang, Q.-L. Li, Zi-Cheng Wang, and Jirun Luo, "The Research and Application of Combining Lut and Memory Compensation for Twta Linearization with Relatively Low Sampling Frequency," Progress In Electromagnetics Research C, Vol. 29, 177-190, 2012.
doi:10.2528/PIERC12022105

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