Industrial Automatic Control Systems and Controllers Annotation << Back Suppression of Adjacent Channels in Digital Superheterodyne Radio with Double Quadrative Conversion Signal A.N. Rudnev A method is proposed for suppressing adjacent channels (SC) in a digital superheterodyne radio receiver (RPU) with double quadrature conversion of an intermediate frequency (IF) signal, which is based on the principle of frequency-dependent phase compensation (FCPC). It is shown that the application of the FZPC principle in RPA with quadrature signal conversion makes it possible to increase the degree of SC suppression. The block diagram of RPU with FZPC is presented. The results of software simulation of signal processing in RPU obtained in the SystemView software simulation environment are presented. The simulation results are presented in the form of spectrograms of signals and energy indicators of suppression of SC in the form of harmonic oscillations and signals with two-position phase shift keying. Keywords: quadrature mixer; zero IF; adjacent channel; digital signal processing; ADC; frequency-dependent phase compensation; software simulation. DOI: 10.25791/asu.1.2023.1407 Pp. 09-13.