Software HDL Modeling of a Coherent Telecommunication System With Digital Modulation

Abstract

This paper presents an assessment the noise immunity of telecommunication systems. The cause of interference is destabilizing factors - conversion of the sampling rate of signals in the transmitter and receiver, frequency and phase shift of the signal in the communication channel, signal delay, white noise, etc. To improve noise immunity, the transceiver contains synchronization circuits that have a certain range of changes in destabilizing factors. Deviation outside this range leads to a deterioration in the parameters and quality of telecommunications. The purpose of the article is to evaluate the digital modulation constellation distortions of Hardware Description Language (HDL) transmitter and receiver implementations of 64QAM signals. It is assumed that the results obtained will be useful in the deployment of digital telecommunications.