Open AccessSub-band detection of small-sized objects during airspace sensing with ultra-short radio pulses
Author(s) -
А. О. Жуков,
Evgeniy G. Zhilyakov,
Ivan Oleynik,
S G Orishchuk,
P A Fedorov,
Igor Kartsan
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2094/2/022013
Subject(s) - ultra high frequency , radar , basis (linear algebra) , computer science , range (aeronautics) , frequency band , radio spectrum , division (mathematics) , remote sensing , noise (video) , secondary surveillance radar , algorithm , acoustics , telecommunications , physics , artificial intelligence , mathematics , engineering , antenna (radio) , geography , aerospace engineering , geometry , arithmetic , image (mathematics)
The possibility of ensuring the safety of flights of aircraft, such as helicopters, at low altitudes, where there is a high probability of unauthorized appearance of small-sized objects such as unmanned aerial vehicles, is being considered. The possibility of solving the problem of detecting such objects on the basis of radar soundings in the resonant frequency range of the UHF radio wave range is considered. Sub-band processing of the received signals is proposed, based on the division of the spectral definition area into sub-bands, for adaptation to the frequency response band and noise filtering. The mathematical apparatus of sub-band signal analysis using sub-band matrices has been developed. An optimal solution to the problem of filtering responses in given sub-bands is obtained. A procedure for processing the received signals is given when making decisions about the presence of a response in a given sub-band. Estimates of the probabilities of erroneous decisions are given for a given probability of errors of the first kind.