CONSTRUCTION AND INVESTIGATION OF AN EFFICIENT DIGITAL CHANNEL FOR TRANSMISSION OF CONTROL INFORMATION IN MODERN DATA TRANSMISSION NETWORKS

Abstract

The task of building an effective digital channel for transmitting control information (CCCI)
consists of two types of tasks. The first of them is to consider the possibility of using the information
transmission channels of network users as CCCI. This type of task is solved by choosing such a channel
(with already known information and probabilistic characteristics) that meets the requirements for CCCI
to the greatest extent. The second type of task of building an effective CCCI is the development of special
channels. This type of task, in turn, is divided into two groups: the first group includes the tasks of
creating a special CCCI in another digital channel (which boils down to increasing the noise immunity
due to the bandwidth of the channel in which the CCCI is created), the second group includes the tasks of
creating a special CCCI based on an analog channel. For the communication network management
network of Ukraine, the task is relevant due to the spread of dispatcher communication networks, which
are based mainly on analog principles and are characterized by a low level of standardization. Unlike
standardized, mostly discrete values of parameters of digital channels, characteristics of analog channels
are determined by the transmission medium (metal cable, microwave waveguide, radio) and have a
continuous nature. This leads to the need to use optimization mechanisms in those cases where when
considering digital channels, the selection of the most suitable from a discrete series of standard values of
any parameter was used.
Keywords: digital control information transmission channel (CCH), OFDM, signal demodulator,
Active correlation filter, optimal reception, noise immunity of signal constellations

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