Abstract
Introduction. The development of error-correcting techniques in digital transmission channels is considered. This is a multiparameter problem the solution of which through the analytical methods is rather difficult. This problem is solved within the framework of an information system for evaluating the applicability of noise-immune coding schemes based on an error sequence obtained from a real communication channel. The work objective is to develop methods for selecting the means of noise-immune protection in the data transmission systems. The key problem is to modify an information system evaluating the applicability of error-correcting coding so that it can choose the most appropriate error-source model for the error flow registered in the particular channel, and coordinate error-correcting codec parameters and characteristics of the communication channel based on the simulation experiments. Note that the choice of error-correcting methods involves selecting not only an algebraic code, but also algorithms for its coding and decoding. The results of using the error-correcting methods depend on the intensity and structure of the errors acting in the transmission channel. Materials and Methods. The basis of the described information system is a specialized software package based on the noise-immune communication channels simulation. To construct such a modification, we suggest adding a new module responsible for the error-source model selection. The module involves a special algorithm for the adequate error-source model selection constructed on the basis of the hidden semi-Markov models theory methods, particularly, on the evaluation problem solution. Research Results. The result of the work is a built-in modification of the information system for assessing the applicability of noise-immune coding schemes which allows, in an automatic mode, selecting a suitable method for a particular data transmission system from a list of the available methods of the anti-jamming protection. Discussion and Conclusions . The results obtained can be applied under designing digital transmission channels. The constructed information system allows for the automation of the process of selecting algorithmic methods of the noise-proof protection in the data transmission systems.
Highlights
The development of error-correcting techniques in digital transmission channels is considered. This is a multiparameter problem the solution of which through the analytical methods is rather difficult. This problem is solved within the framework of an information system for evaluating the applicability of noiseimmune coding schemes based on an error sequence obtained from a real communication channel
The key problem is to modify an information system evaluating the applicability of error-correcting coding so that it can choose the most appropriate error-source model for the error flow registered in the particular channel, and coordinate error-correcting codec parameters and characteristics of the communication channel based on the simulation experiments
The basis of the described information system is a specialized software package based on the noiseimmune communication channels simulation
Summary
Работа посвящена решению задачи подбора математической модели источника ошибок, адекватно отображающей заданный канал связи. Предлагается решать данную задачу в рамках информационной системы оценки применимости схем помехоустойчивого кодирования на основе последовательности ошибок, полученной из реального канала связи. Основная задача состоит в построении модификации информационной системы оценки применимости схем помехоустойчивого кодирования, позволяющей по потоку ошибок, полученному из реального канала связи, выбрать наиболее близкую математическую модель источника ошибок и на основе компьютерных имитационных экспериментов решить задачу согласования параметров помехоустойчивого кодека и характеристик конкретного канала связи. В основе работы модуля подбора лежит разработанный алгоритм выбора адекватной математической модели источника ошибок, использующий методы теории скрытых полумарковских моделей, в частности, решение задачи оценивания. Результатом работы является построенная модификация информационной системы оценки применимости схем помехоустойчивого кодирования, которая позволяет в автоматическом режиме из списка доступных методов помехоустойчивой защиты подбирать подходящий
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