Spatial signal processing for angular coordinate measurement in FMCW autoradar
- 1 Nizhni Nivgorod State University n.a. N.I. Lobachevsky (Nizhni Nivgorod, Russia)
Abstract
Formulation of the problem. The paper considers the problem of measuring angular coordinates in a car radar. In advanced telecommunication systems for assisting the driver in difficult road situations (ADAS), measuring the azimuth and especially the elevation angle and, as a consequence, the height of an oncoming object is extremely necessary. It is believed that the radar uses MIMO technology to increase the aperture of the antenna array on the receiving side. The structure of a MIMO radar with an encoder on the transmitting side and a decoder on the receiving side is proposed.
Goal. Develop and propose two methods of spatial signal processing with different computational complexity for measuring the angular coordinates of a radar detector.
Results. Analytical expressions are obtained for pseudospectral functions of azimuth and elevation measurements in an automotive FMCW radar using short probing chirp pulses and MIMO techniques.
Practical significance. The method of the minimum polynomial of the correlation matrix for measuring angular coordinates is applied, which has super-resolution properties and works in the case of a short signal sample. This method allows adaptively estimating the number of useful sources on the air. The algorithm of decorrelation of targets is used, which increases the accuracy of measuring the angles of the sources. Numerical modeling is carried out, which showed the high efficiency of the proposed methods of signal processing.
- Received
- 21.02.2025
- Approved after review
- 28.02.2025
- Accepted
- 30.04.2025
How to cite
Семенов В.Ю. Пространственная обработка сигналов для измерения угловых координат в FMCW-авторадаре // Радиотехника. 2025. Т. 89. № 5. С. 173–185. DOI: https://doi.org/10.18127/j00338486-202505-19
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