Синтез на предварителен съгласуван филтър за борба с пасивни смущения
Synthesis of a Pre-Tuned Filter for Combating Passive Interference

Author(s): Mihail Zhelyazov, Sofia Uzunova
Subject(s): Social Sciences, Education, Vocational Education, Adult Education, Higher Education , State/Government and Education, Inclusive Education / Inclusion, Distance learning / e-learning
Published by: Военна академия „Г. C Раковски"
Keywords: matched filter; throughput; signal to noise ratio; simulation modeling; correlation function
Summary/Abstract: In the report, a variant for the synthesis of a mathematical model of a matched filter for compensation of passive interference is proposed, which allows to apply the classical method of compensation by during a period subtraction and enhancement of the signal-to-noise ratio. At the beginning of the publication, the topicality of the topic is proven and the initial and restrictive conditions for conducting the research are described. To achieve the goal, special attention has been paid to the advantages of superconducting signals, and more precisely to the throughput and the signal-to-noise ratio. The study was performed by simulation modeling of a real signal reflected from the target, with the initial conditions and the choice of probing ultra-broadband signal set. The essence of the proposal consists in the application of a coherent filter built on nonlinear transmission circuits and its integration at the input of the receiving device. Thus, the SF plays the role of a pre-filter aligned with the duration of the probing ultra-wideband signal. At the output, a signal is formed with clearly expressed maxima of the correlation function and with insignificant noise samples. The results show that the idea laid down in the research is applicable and provides: an increase in the signal-to-noise ratio by up to 5-6 dB; in the subsequent processing, the classical methodology for compensating passive disturbances is applicable.

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