RADIO TRANSMITTER WITH DIGITAL CORRECTION OF NONLINEARITY Russian patent published in 2020 - IPC H04B1/62 

FIELD: radio engineering and communications.

SUBSTANCE: invention relates to a radio transmitter with digital nonlinearity correction. Device allows minimizing amplitude and phase distortions of the transmitted signal under conditions of rapidly changing and a priori undefined nonlinearity of the transfer characteristic of the radio path. In the radio transmitter, digital device (1) has a signal control and shaping device (1.1), a digital nonlinearity corrector (1.2) and intermodulation component meter (1.3). Digital corrector of nonlinearity (1.2) consists of series-connected first complex mixer (1.2.1), correcting nonlinear element (1.2.2), second complex mixer (1.2.3), digital filter (1.2.4) and aperture normalization unit (1.2.5), output of which is output of digital nonlinearity corrector (1.2), and input of first complex mixer is its first input. Second input of the correcting nonlinear element (1.2.2) is the second input of the digital nonlinearity corrector (1.2), which calculates the complex output signal si_out , sq_out by converting the input complex signal si, sq.

EFFECT: reduced time for obtaining a predistorted signal and high efficiency of a nonlinearity corrector.

1 cl, 6 dwg