INVESTIGATION OF CHARACTERISTICS OF QUADRATIVE - AMPLITUDE MODULATION AFFECTING INTERFERENCE-RESISTANT RECEPTION
A.A YarmukhamedovHead of the department: Candidate of Technical Sciences, Associate Professor of the Department of radio Engineering devices and systems of Tashkent State Technical UniversityA.B. JabborovSenior lecturer of the Department of radio Engineering devices and systems of Tashkent State Technical University
ABI
Abstract
ABSTRACT The article analyzes the main reasons for reducing reliability, channel violations during the transmission and reception of digital television signals. The main regularities of noise-resistant formation of quadrature-amplitude modulation are investigated. Mathematical models, vector diagrams of the QAM signal and the results of a theoretical study of the dependence of the bit error probability on E<sub>b</sub>/N<sub>0</sub>, to ensure noise-immune reception of digital television signals.
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