REALIZATION OF METHODS FOR SYNCHRONIZATION OF DATA FLOWS IN DIGITAL SIGNAL PROCESSING SYSTEMS
Abstract
In digital signal processing applications involving coherent processing of data from a phased antenna array, it is important to ensure the coordinated arrival of digitized data from antenna elements to processing units. As the number of data transmission channels in DSP complexes grows, the probability of errors in the data transmission channels increases significantly, which puts forward increased requirements to the assurance of the program complex of isochronous data transmission. The paper presents the results of the development and realization of methods that increase the assurance of isochronous data transmission. A combined method of isochronous data transmission is proposed, characterized by the use of service gaps in the transmission of operand arrays and dynamic compensation of delays in data channels. The most probable errors occurring during data transmission are singled out and methods of their parrying are proposed. A program complex realizing the combined method is described. Using the attributive model of dependability, the dependability of the program complex is analyzed. The analysis has shown that the use of the combined method will quadruple the number of data transmission channels in the DSP complex at a given level of dependability and fixed time of reliable operation in comparison with the basic method. With a significant increase in the number of data channels, there is a need to maintain a given level of dependability. In this regard, a modernized method of isochronous data transmission is proposed, in which the algorithms for checking data integrity, checking the acceptable range of delay mismatch in the data channels and the algorithm for switching the reference channels were improved. An evaluation of the implementation dependability of the modernized method showed its ability to provide twice the number of data channels compared to the combined method.
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