The article deals with an adaptive algorithm for the reception of multipath signals in the high frequency communication channel, built on the basis of experimental data on quasi-stationary channel period. The algorithm allows high-quality offset delayed relative to the direct beam multipath components by providing with accurate synchronization processing between the transmitting and receiving parties, as well as the use of estimates quadrature components of the channel impulse response obtained by the channel sensing signal known shape.
Keywords: adaptive algorithm, multipath, delay time, impulse response.Citation: Korennoi A.V., Mezhuev A.M., Revin V.S. The adaptive algorithm receiving multipath signals in the high frequency communication channel based on the estimation of its impulse response,
In work on the basis of the deep analysis of approaches to estimation of efficiency of an information exchange of telecommunication systems is offered the method of an estimation on the basis of the generalized indicator – performance coefficient (PC) of transfer of information taking into account losses of information packets. The indicator is specified at network level with use of cybernetic capacity of information losses. The structural scheme of the device with instructions of elements for practical realization of a method is developed. The generalised algorithm providing the analysis and an estimation of information efficiency of telecommunication systems with various structures on the basis of the received method is synthesized. Analytical and imitating modelling of work of algorithm and estimation of information efficiency of telecommunication systems with structures “star” and full connected in the conditions of change of the input traffic taking into account of influence of hindrances is spent. Results of modelling have confirmed working capacity of a method and reliability of estimations received on his basis that can be used at the organisation of complex multi-contour of adaptation.
Operation is devoted the decision of the task increase of structural stability and information efficiency of network information systems on the basis of mathematical apparatus of the theory of fuzzy sets and the spectral theory of graphs. For this purpose introduction of two variants fuzzy structural (channel and nodal) is offered to redundancy of the determined regular topology of network information systems. Functions of an accessory of separate structural elements to which in correspondence the modes of an information exchange which are representing itself as requirements to structural characteristics of system are defined. Analytical and imitative modeling for research of influence fuzzy redundancy on the main structural parameters of the determined topology and estimation of information efficiency of the received structures of network information systems is conducted. Results of modeling showed perspectivity of the offered approach at implementation of structural adaptation of systems to changing conditions of an information exchange.
Operation is devoted obtaining, on the basis of the spectral theory of graphs, the adaptive algorithm of conversion of basic structural models of network information systems for synthesis of topology with the minimum redundancy meeting requirements of structural stability by the given criteria. On the basis of switchings of Zajdel the method providing on each step of operation of cycles of algorithm a finding cospectral structures of high stability is developed. During researches concepts cospectral structures in narrow and wide sense are formulated. Modeling of operation of algorithm and an estimation of information efficiency cospectral network information systems on the basis of the generalized index – performance coefficient of information transfer taking into account influence of noises is led. Results of modeling confirmed a realizability and serviceability of the received algorithm, and also allowed to generate practical recommendations about its application in a structural circuit of complex multiple loop adaptation.
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