V.T. Ermolaev1, V.Yu. Semenov2, A.G. Flaxman3

1-3 Nizhni Nivgorod State University n.a. N.I. Lobachevsky (Nizhni Nivgorod, Russia)

Formulation of the problem. The paper considers the problem of simultaneous detection of near and far targets in a millimeter wave automotive radar under the influence of active interference. The probing signals of similar radars installed on oncoming and passing vehicles act as active interference. Two methods are proposed to solve this problem. The first one performs interference cancellation in the frequency domain, and the second one is based on the maximum likelihood estimate of the radio channel and performs interference cancellation in the time domain.

Goal. Propose the structure of an automobile radar and processing algorithms that allow simultaneous detection of near and far targets under the influence of active interference.

Results. The effectiveness of two proposed digital signal processing methods for solving this problem is shown. The first method performs noise cancellation in the frequency domain. The second method is based on the maximum likelihood estimate of the radio channel and performs interference cancellation in the time domain. An original algorithm for estimating the detection threshold for both interfering and non-interfering targets is proposed, which has a low computational complexity.

Practical significance. Both proposed methods have low computational complexity and do not require direct matrix inversion, which makes it possible to use these algorithms in the software of digital signal processors and programmable logic integrated circuits. Numerical modeling was carried out, which showed the high efficiency of the proposed methods in terms of the probability of simultaneous detection of near and far targets with a low level of false alarms.

Ermolaev V.T., Semenov V.Yu., Flaxman A.G. Methods of target detection in automotive radar under the conditions of the exposure to active interference. Radiotekhnika. 2023. V. 87. № 1. P. 73−87. DOI: https://doi.org/10.18127/j00338486-202301-07 (In Russian)

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