Zhurnal Radioelektroniki - Journal of Radio Electronics. ISSN 1684-1719. 2020. No. 2
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Full text in Russian (pdf)
Russian page

 

DOI  10.30898/1684-1719.2020.2.6

UDC 621.396.96

 

Analysis of the effect of nonuniform passive interference on the detection characteristics of inter-period processing

 

I.  E. Chukhlomin, R. B. Ryumin, V. V. Pavlik, N. A. Faizulin

JSC "Scientific research institute on measuring instrumentation - radio engineering complexes" (AO NIIIT-RK), Darvina 14, Chelyabinsk, 454087, Russia

The paper is received on January 21, 2020, after correctionn - on February 10, 2020

Abstract. Adaptive processing of signals in the presence of passive interference is an actual task for different pulse radars. Adaptation to passive interference is based on the optimization of the processing algorithm depending on interference parameters, while a priori independent interference parameters are replaced with their estimates according to the adaptive Gaussian approach methodology. The interference parameters estimation is carried out by classified sampling, while the adopted approaches assume that the interference is stationary within the training window. In reality, passive interference is a non-stationary process, as a result of which the estimation of the interference parameters changes, which leads to a change in the detection characteristics. In most pulsed radars, this problem is not solved by the adaptive MTI, that’s why, the process of suppressing inhomogeneous passive interference remains actual. Analysis of correlated Gaussian interference nonuniformity effect on adaptive interperiod processing detection characteristics based on maximum likelihood evaluation of interfernce correlation matrix is carried out in the article. For the models of stepwise and linear change of interference intensity and two varieties of adaptive detectors, the dependences of false alarm probability and the correct detection on training sample size and interference location in the window are determined.

Key words: interference suppression, interperiod processing, detection characteristics, signal detector.

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For citation:

Chukhlomin I.E., Ryumin R.B., Pavlik V.V., Faizulin N.A. Analysis of the effect of nonuniform passive interference on the detection characteristics of inter-period processing. Zhurnal Radioelektroniki - Journal of Radio Electronics. 2020. No. 2. Available at http://jre.cplire.ru/jre/feb20/6/text.pdf

DOI  10.30898/1684-1719.2020.2.6