V.Yu. Semenov1

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

1 vitali.semenov@gmail.com

Formulation of the problem. The problem of spatial processing of signals in virtual receiving channels of the antenna array of a vehicular MIMO (Multiple Input Multiple Output) radar is considered. The virtual antenna array is formed by increasing the antenna resolution in the horizontal plane. Traditional short chirp signals with FMCW modulation are used as probing pulses. The problem of interference suppression in the azimuthal plane is considered. The case is also investigated when two cars fall into the main beam of the antenna array (AA) of the radar, and therefore it is necessary to use azimuth super-resolution methods. In modern vehicles, these options are necessary for collision avoidance systems and driver assistance systems.

Goal. To develop two methods of spatial digital signal processing for narrowband interference suppression and target direction finding using a MIMO autoradio receiver antenna array.

Results. An analytical expression for the received signal under conditions of Doppler frequency shift and short probing chirp pulses in an automobile MIMO radar is obtained. A MIMO radar structure with an encoder on the transmitting side that does not require a decoder on the receiving side is proposed.

Practical significance. The results of numerical modeling of spatial suppression of narrow-band interference by the power vector method are presented. The results of numerical modeling of the accuracy of measuring the azimuth of a moving vehicle by the super-resolution minimal polynomial method are presented. The results of a full-scale experiment are shown, which confirmed the possibility of effective direction finding of two closely located vehicles in the case of a short sample of the input process.

Semenov V.Yu. Application of linear antenna arrays for interference suppression and target direction finding in automobile MIMO radar. Radiotekhnika. 2025. V. 89. № 12. P. 160−172. DOI: https://doi.org/10.18127/j00338486-202512-17 (In Russian)

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