V.N. Antipov – Dr.Sc.(Eng.), Professor, Head of Department,
Moscow Aviation Institute (National Research University)
E-mail: antipov.v.n@gmail.ru
E.E. Koltyshev – Dr.Sc.(Eng.), Professor, Head of Department,
Ural Design Bureau «Detail» (Kamensk-Uralsky)
E-mail: kjj_@mail.ru
A.Yu. Frolov – Dr.Sc.(Eng.), Associate Professor, Professor,
Moscow Aviation Institute (National Research University)
E-mail: alexey_frolov@ inbox.ru
V.T. Jankowski – Dr.Sc.(Eng.), Senior Research Scientist, Professor,
Moscow Aviation Institute (National Research University)
E-mail: yankvlad@ mail.ru
The paper analyzes the influence of the non-identity of the receiving channels of radar stations (radar) on the work of the adaptive coherent interference compensator. Under the action of noise interference along the side lobes of the BOTTOM and the noise / noise ratio of 30 dB, an adaptive algorithm with ideal receiving channels provides almost complete interference suppression and increases the level of internal noise by 3 dB with a sample length of more than 5 samples. Analytical expressions are obtained that determine the value of the noise suppression coefficient in the presence of amplitude-phase non-identities of the receiving channels. A statistical model is proposed that describes the unevenness of the complex frequency characteristics of the receiving radar paths. The technique considered in the article allows us to analyze the operation of a coherent interference equalizer with an arbitrary number of compensation channels. Using mathematical modeling, it is shown that in modern radars with one compensation channel, due to the non-identical amplitude-phase characteristics of the receiving channels, interference suppression is limited to 20 … 30 dB. To provide a greater level of interference suppression, it is proposed to use adaptive digital correction of the amplitude-phase non-identity of the receiving channels.
- Antipov V.N., Koltyshev E.E., Frolov A.Yu., Yankovskii V.T. i dr. Pomekhozashchita radioelektronnykh sistem upravleniya letatelnymi apparatami i oruzhiem. Pod redaktsiei V.N. Lepina. M.: Radiotekhnika. 2015. (in Russian)
- Shirman Ya.D., Manzhors V.N. Teoriya i tekhnika obrabotki radiolokatsionnoi informatsii na fone pomekh. M.: Radio i svyaz. 1981. (in Russian)
- Farina A. Digital equalisation in adaptive spatial filtering for radar systems: a survey. Signal Processing. 2003. 83.