V.V. Nasonov1, E.S. Fitasov2

1 Yaroslavl Higher Military Institute of the Air Defense (Yaroslavl, Russia)

2 National Research Lobachevsky State University of Nizhny Novgorod (Nizhny Novgorod, Russia)

1 patriot457@mail.ru; 2 fitasoves@mail.ru

Setting the task. The problem of detecting non-stationary active noise interference (ANI) in multi-channel radio systems with antenna arrays is considered. A multi-channel radio system with an antenna array is investigated. To implement an automatic canceller for active noise interference, the antenna system generates a main channel radiation pattern and several compensation channel antenna patterns, each differing in shape and overlapping the sidelobes of the main radiation pattern. The case in which the number of ANI is equal to the number of compensation channels is studied. The possibility of using the eigenvalues of the interchannel correlation matrix of the main and compensation channels as decision statistics is analyzed.

Goal. To propose a method for detecting non-stationary ANI in multi-channel radio engineering systems with antenna arrays based on the analysis of the statistical properties of the eigenvalues of the sample interchannel correlation matrix.

Results. The use of an interchannel correlation matrix of the main and compensation channels to detect non-stationary active noise interference is proposed. An analysis of the eigenvalues of the sampled interchannel correlation matrix is conducted. Decision statistics for detecting non-stationary active noise interference are obtained. It is shown that the optimal solution to the problem of detecting non-stationary active noise interference will consist of a comparison with a certain threshold of the minimum eigenvalue of the sampled interchannel correlation matrix. Numerical modeling was used to obtain detection characteristics (dependences of the probability of correctly detecting non-stationary active noise interference on the interference-to-noise ratio) and an analysis of the detection characteristics of non-stationary active noise interference is conducted depending on the mismatch angle (the angle by which the radiation pattern of the main channel deviates during the time of interference reception).

Practical significance. In modern radio systems (e.g., radar stations), detecting non-stationary ANI is necessary for adapting jamming algorithms to non-stationary jamming conditions. The proposed method can be used in ANI defense systems to ensure detection of useful signals in non-stationary jamming environments.

Nasonov V.V., Fitasov E.S. Detection of transient active noise interference in multichannel radio systems with antenna arrays. Radiotekhnika. 2026. V. 90. № 5. P. 150−164. DOI: https://doi.org/10.18127/j00338486-202605-18 (In Russian)

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