Vol. 29

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2012-05-22

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

By Xin Hu, Gang Wang, Q.-L. Li, Zi-Cheng Wang, and Ji-Run Luo
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


Xin Hu, Gang Wang, Q.-L. Li, Zi-Cheng Wang, and Ji-Run 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
http://jpier.org/PIERC/pier.php?paper=12022105

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