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ISSN 2415-3400 (Online)
ISSN 1028-821X (Print)


Sytnik, OV, Pochanin, GP, Masalov, SA, Ruban, VP, Kholod, PV

O. Ya. Usikov Institute for Radiophysics and Electronics of the National Academy of Sciences of Ukraine
12, Proskura st., Kharkov, 61085, Ukraine

E-mail: ssvp11@ire.kharkov.ua

Language: russian

Subject and Purpose. The subject of the study is a measuring system consisting of several spatially separated receiving points and a transmitter emitting video pulse signals. The aim of the work is to create an effective algorithm for processing signals from a multi-position observation system under conditions of correlated jamming to solve the problem of the operational detection of mobile objects hidden behind optically opaque obstacles.

Methods and methodology of work are based on the difference-distance-measuring principle of calculation of the target coordinates. The informative signal from the target is not identified by direct methods because of the multiple reflections of the sounding signal from the walls of the room and objects located inside it. The procedure for suppressing the interference reflections of the probing signal is developed. The accumulation of a signal and the removal of interference is carried out in real time by subtracting the alternating samples of the observed process from the signals of each receiving point assuming that the object is slow moving or practically unmoving during the time of sounding signal propagation from transmitter to target and back. The delay of the probing signal during its propagation from the transmitter to the target and from the target to each of the receivers has been estimated using the proposed peak factor criterion. The same criterion is used to reject the struck lines on the radar image of the target's trajectory.

Results. A high-speed algorithm is developed which, at the condition of a relatively high signal-to-noise ratio, makes it possible to use the signal peak factor as a criterion for jammers suppression at the radar's image. The simplicity of signal processing allowed to continuously display the data in a user-friendly form. The continuity of measurements of the delays of the reflected signals from the target to the receiving points is ensured by polynomial approximation of the object trajectories relative to each of the receivers.

Conclusions. The high energy characteristics of the observation system, the stability of the parameters during the measurements, and the high accuracy of the reflected waveform reproduction allowed us to use digital signal processing methods in real time. The simulation results are confirmed by data that were accumulated and averaged over a series of similar experiments.

Keywords: algorithm, alternating samples, peak-factor, radar, spatially separated receiving system, ultra-wideband signal, video pulse

Manuscript submitted 05.03.2018
PACS 42.30.sy
Radiofiz. elektron. 2018, 23(2): 39-47
Full text (PDF)

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