Digital Demodulator of the Quadrature Amplitude Modulation Signals

Oleg Chernoyarov 1 , 2 , 3 , Alexey Glushkov 4 , Vladimir Litvinenko 5 , Yuliya Litvinenko 5  and Boris Matveev 5
  • 1 International Laboratory of Statistics of Stochastic Processes and Quantitative Finance, National Research Tomsk State University, 634050, Tomsk
  • 2 Department of Higher Mathematics and System Analysis, Faculty of Engineering and Economics, Maikop State Technological University, 385000, Maikop
  • 3 Department of Electronics and Nanoelectronics, Faculty of Electrical Engineering, National Research University “MPEI”, 111250, Moscow
  • 4 Department of Infocommunication Systems and Technologies, Faculty of Radio Engineering, Voronezh Institute of the Ministry of Internal Affairs of the Russian Federation, , 394065, Voronezh
  • 5 Department of Radio Engineering, Faculty of Radio Engineering and Electronics, Voronezh State Technical University, 394026, Voronezh


In this paper, the digital algorithm and the device for the demodulation of the quadrature amplitude modulation signals are considered. The fundamental advantages of our approach are simple hardware implementation, minimal number of arithmetic operations required over the signal period as well as the potential interference immunity in the presence of Gaussian noise. The expressions have been found for the error probability and their inaccuracy has been estimated. By means of the statistical simulation methods, the practical interference immunity of the introduced demodulator, together with the influence of phase locking errors have been tested. The introduced demodulator can be implemented either as a device independent from the programmable logic devices, or as an installation unit of the receiver equipment.

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