DEVELOPMENT OF A MODEL OF INTERFERENCE-RESISTANT DATA TRANSMISSION FOR INFORMATION TECHNOLOGY OF CONTROL OPTIMIZATION OF DYNAMIC SYSTEMS
DOI:
https://doi.org/10.20998/2079-0023.2022.02.09Keywords:
data transmission, immunity, coding, correcting codes, model, dynamic systems, information technologyAbstract
For data transmission channels used in local control systems for various processes, simple and inexpensive methods are needed that will allow the necessary information to be transmitted without errors. Errors that occur in continuous communication channels are one of the main obstacles to the reliable transmission of information. As a result of the analysis of error statistics in discrete channels, it was concluded that single and double errors occur most often. The purpose of this article is to develop a model of interference-resistant data transmission for information technology optimization of control of dynamic systems. The analyzed causes of errors are signal attenuation, noise and various interferences. The resulting transmitted signal is determined by the combination of the useful signal and the interference signal. When considering discrete signals, several causes of errors are highlighted – edge distortions, pulse splitting, and others. Considered methods of combating obstacles: means of operational and preventive nature; means of increasing interference resistance during the transmission of single elements; use of feedback; adding redundancy to the code; tamper-proof coding. It is proposed to combat errors using tamper-resistant coding. Among the interference-resistant codes, redundant block separable systematic codes are selected, which are divided into cyclic codes and Hamming code. The basis of the interference-resistant coding model is the use of a systematic code - a cyclic code or a Hamming code followed by cascade coding. Since the coding model must be adaptively used in different systems, a necessary criterion of the model is its universality. The model should work in different systems without changing the encoding and decoding algorithms. Among the many types of interference-resistant codes, cascade codes are chosen for use. Widespread cascade codes are universal, easily scalable, work stably, have proven themselves well in world practice, therefore they are recommended for use in various information management systems. The implementation of the interference-resistant data transmission model is presented.
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