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T-Comm_Article 6_3_2021

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Sergei S. Pechnikov, Voronezh Institute of the Ministry of Internal Affairs of Russia, Voronezh, Russia, orl_os@mail.ru
Sergey A. Sherstyukov, Voronezh Institute of the Ministry of Internal Affairs of Russia, Voronezh, Russia, sherstukov@vimvd.ru

Currently, increasing the speed of information transmission in wireless communication networks is a topical issue. The growing demand for spectral efficiency in radio communication systems gives rise to the introduction of signals with amplitude-phase modulation. Despite all its advantages, signals with vector modulation are characterized by a change in the envelope, which makes it impossible to use highly efficient nonlinear power amplifiers. Energy efficiency is clearly a critical factor in portable radio communications systems, where power supplies are often used in small packages, and the presence of energy losses due to heat dissipation is a significant drawback that requires additional cooling systems. In this connection, when developing modern radio communications, radio engineers are faced with the contradictory task of achieving maximum energy and spectral efficiency. One of the approaches to reduce nonlinear distortion of vector modulation is the use linearization schemes for nonlinear power amplifiers. This work is devoted to increasing the energy and spectral efficiency of signals with amplitude-phase modulation. The article discusses the restrictions imposed on the input signals for the method for optimizing of structure of spectrally effective radio signals with vector modulation, the formation of the output signal, the influence of phase shifters phase imbalance on p/2, the index of balance modulation, and the analysis of parametric sensitivity. The possibility of using quadrature modulators to form components with phase modulation and constant envelope is considered. This method was simulated and the effect of phase imbalance on the shape of the output signal constellation was revealed.

Keywords: digital radio communication, signals with high spectral efficiency, linearization of power amplifiers, phase imbalance, constant envelope.


  1. L.A. Belov. (2020). Intermodulation distortion of ultra-high frequency signals. Moscow: Hotline – Telecom 2020. 144 p.
  2. System and method of linearization of the power amplifier:
    Pat. 2433522 Rus. Federation. IPC H03F 1/32 / V.Ya. Arkhipenkov, S.A. Goreinov, A.O. Melnikov; No. 2010115827; declared 04/21/10; publ. 10.11.11, Bul. No. 31-22 p.
  3. S.A. Sherstyukov, S.S. Pechnikov. (2020) Optimization of the structure of spectrally efficient radio signals on the basis of functional converters and vector modules as part of the predistortion path. Systems for the formation, formation and processing of signals. Vol. 11. No. 2, pp. 4-10.
  4. P.A. Popov, S.A. Sherstyukov, D.A. Zhaivoronok, V.V. Romashov. (2001). Quadrature radio signal conditioners. Voronezh: Voronezh Institute of the Ministry of Internal Affairs of Russia. 176 p.
  5. S.A. Sherstyukov. (2010). Functional converters of modulating voltage in quadrature RF signal conditioners with angle modulation. Voronezh: Scientific book. 207 p.
  6. S. S. Pechnikov, S. A. Sherstukov. (2020). Optimization of the structure of spectrally efficient radio signals based on functional converters and vector modulators as part of the predistortion path, 2020 Systems for synchronization, generation and processing of signals in telecommunications (SINCHROINFO), Svetlogorsk, Russia, p. 1-5, DOI: 10.1109/SYNCHROINFO 49631.2020.9166070.
  7. M.K. Da Savila. Vector Locked Loop, U.S. Patent 5,105,168, April 14, 1992.
  8. D. Cox, Linear Amplification with Nonlinear Components, in IEEE Transactions on Communications, vol. 22, no. 12, pp. 1942-1945, December 1974, doi: 10.1109/TCOM.1974.1092141.
  9. A.A. Kurushin. (2005). Modeling of digital streams of radio communication in the ADS environment / Ptolemy. Moscow: Solon-Press. 184 p.
  10. K. Feer (200) Wireless digital communication. Modulation and assortment expansion methods. Moscow: Radio and communication. 520 p.

Information about authors:

Sergey S. Pechnikov, post-graduate cadet of Voronezh Institute of Russian Ministry of Internal Affairs, Voronezh, Russia
Sergey A. Sherstyukov, doctor of technical sciences, assistant professor, professor of the chair infocommunication systems and technologies at Voronezh Institute of the Ministry of Internal Affairs of Russia, Voronezh, Russia