PIER C
 
Progress In Electromagnetics Research C
ISSN: 1937-8718
Home | Search | Notification | Authors | Submission | PIERS Home | EM Academy
Home > Vol. 29 > pp. 177-190

THE RESEARCH AND APPLICATION OF COMBINING LUT AND MEMORY COMPENSATION FOR TWTA LINEARIZATION WITH RELATIVELY LOW SAMPLING FREQUENCY

By X. Hu, G. Wang, Q.-L. Li, Z.-C. Wang, and J.-R. Luo

Full Article PDF (430 KB)

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:
X. Hu, G. Wang, Q.-L. Li, Z.-C. Wang, and J.-R. 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

References:
1. Kenington, , P. B., , High-Linearity RF Amplifier Design, , Artech House, , Boston, MA, 2000..

2. Eid, , E. E., , F. M. Ghannouchi, and F. Beauregard, , "Optimal feedforward linearization system design," Microwave Journal, Vol. 38, No. 11, 78-86, 1995..

3. Young, , Y. W. Y., , Y. Jaehyok, Y. N. Joongjin, H. C. Jeong, and K. Bumman, "Feedforward amplifier for WCDMA base stations with a new adaptive control method," IEEE MTT-S Int. Microw. Symp. Dig., Vol. 2, 769-772, 2002.

4. Kim, , Y., , Y. Yang, S. H. Kang, and B. Kim, , "Linearization of 1.85 GHz amplifier using feedback predistortion loop," IEEE MTT-S Int. Microw. Symp. Dig., Vol. 4, 1675-1678, 1998.

5. Ezzeddine, A. K., , H. A. Hung, and H. C. Huang, , "An MMIC C-band FET feedback power amplifier," IEEE Trans. Microw. Theory Tech., Vol. 38, No. 4, 350-357, 1990.

6. Morris, , K. A. , J. P. McGeehan, and , "Gain and phase matching requirements of cubic predistortion systems," Electron. Lett., , Vol. 36, No. 21, 1822-1824, , 2000.


© Copyright 2010 EMW Publishing. All Rights Reserved