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Results of experimental research of linearization of HF transmitting channel

Keywords:

I.E. Kashchenko – Engineer-Developer, Deputy Head of NILE, PJSC «ONIIP». E–mail: info@oniip.ru
A.V. Bogdanov – Head of Department, PJSC «ONIIP». E–mail: info@oniip.ru


This article presents the results of experimental research of linearization of HF transmitting channel. The experimental system of digital predistortions input is developed by the authors. One of the methods of amplification path creation model on the basis of polynomial system with memory is described in details. On the basis of this model the inverse model for the predistortions input system is designed. Modeling error estimation is made. As well there is presented the experimental system that allows researching the power real amplifiers using the PC and different algorithms of the signal digital processing. Positive results of usage of the polynomial system with memory for linearization of the amplification path of the frequency decameter range are obtained. Research of the system in different signals passing through the systems is made.
References:
  1. Gandhi H. A Flexible Volterra-based adaptive digital predistortion solution for wideband RF power amplifier linearization. URL: http://www.ti.com.
  2. Kenney J.S., Woo W., Ding L., Raich R., Ku H., and Zhou G.T. The impact of memory effects on predistortion linearization of RF power amplifiers // Proc. 8th Int. Microwave Opt. Technol. Symp. Montreal, QC, Canada, June 19–23. 2001. P. 189–193.
  3. Konstantinou Kim and K. Digital predistortion of wideband signals based on power amplifier model with memory // IET Electron. Lett. 2001. Nov. V. 37. № 23. P. 1417–1418.
  4. Tang S. et al. Loop Delay Correction for Adaptive Digital Linearization of Power Amplifiers // Wireless Communications and Networking Conference. WCNC 2007. 11-15 March 2007. IEEE. P.1987–1990.
  5. Tranter W. PTR: Principles of Communication Systems Simulation with Wireless Applications // William H. Tranter Prentice Hall PRT. New Jersey. 2011. P. 445–447.

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