Article

Article title NOISE IMMUNITY OF RECEPTION OF DISCRETE SIGNALS WITH UNKNOWN THE DURATION
Authors V. S. Plaksienko
Section SECTION III. RADIO ENGINEERING AND COMMUNICATION
Month, Year 07, 2018 @en
Index UDC 621.396.3
DOI 10.23683/2311-3103-2018-7-186-197
Abstract The study of noise immunity of processing of discrete signals with inconsistent band filtering. It is established that in such conditions the use of the method of combined addition is effective. Features of reception in the presence of mutual correlation between processes are investigated. The aim of the research is to analyse the detailed characteristics of mutual process exceedances and their identification as a signal or as a crushing in a limited amount of a priori information for the purpose of synthesis of methods and devices of invariant signal processing. After separation by types of manipulation processes are formed, the energy difference of which determines the presence or absence of the expected signals. For incomplete a priori data, when the receiver filter band is not consistent with the duration of the elementary symbol, it is difficult to obtain accurate analytical expressions for the probability of erroneous reception. Operations of demodulation and coordination across the width of the signal spectrum cannot be performed optimally, therefore, there is a small difference of energies in the process that contains the signals, in comparison with the processes without signals. The scheme of choice and decision-making determines in which of the input processes the signal is present, while in the conditions of non-optimal incoherent broadband reception, the selection criterion is the fact of exceeding the power. The possibilities of optimization of processing in conditions of considerable a priori uncertainty of information about the parameters of signals and in particular about the duration of their elementary symbol is considered. Based on the study and analysis of the detailed characteristics of the mutual process exceedances, their identification as a signal or as a crushing under the conditions of a limited amount of a priori information is realized. The problem of heuristic synthesis of methods and devices of invariant signal processing is solved. Most fully the energy of the difference processes characterizes the area of the SП emission, however, its evaluation in real time is impossible, so this option cannot be used in an informative when creating algorithms to optimize reception. The energy of mutual exceedances can be estimated by selecting as informative parameters such as the duration of the exceedances of tп and the level of exceedances of q, without measuring the area of emissions of SП. The study of noise immunity of processing of discrete signals with inconsistent band filtering. It is established that in such conditions the use of the method of combined addition is effective. Features of reception in the presence of mutual correlation between processes are investigated. The aim of the research is to analyze the detailed characteristics of mutual process exceedances and their identification as a signal or as a crushing in a limited amount of a priori information for the purpose of synthesis of methods and devices of invariant signal processing. After separation by types of manipulation processes are formed, the energy difference of which determines the presence or absence of the expected signals. For incomplete a priori data, when the receiver filter band is not consistent with the duration of the elementary symbol, it is difficult to obtain accurate analytical expressions for the probability of erroneous reception. Operations of demodulation and coordination across the width of the signal spectrum cannot be performed optimally, therefore, there is a small difference of energies in the process that contains the signals, in comparison with the processes without signals. The scheme of choice and decision-making determines in which of the input processes the signal is present, while in the conditions of non-optimal incoherent broadband reception, the selection criterion is the fact of exceeding the power. The possibilities of optimization of processing in conditions of considerable a priori uncertainty of information about the parameters of signals and in particular about the duration of their elementary symbol are considered. Based on the study and analysis of the detailed characteristics of the mutual process exceedances, their identification as a signal or as a crushing under the conditions of a limited amount of a priori information is realized. The problem of heuristic synthesis of methods and devices of invariant signal processing is solved. Most fully the energy of the difference processes characterizes the area of the SП emission, however, its evaluation in real time is impossible, so this option cannot be used in an informative when creating algorithms to optimize reception. The energy of mutual exceedances can be estimated by selecting as informative parameters such as the duration of the exceedance of tп and the level of exceedance of q, without measuring the area of emissions of Sп.

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Keywords Veception of discrete signals; processing; potential noise immunity; the misalignment of band signals and receiver devices.
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