Millimeter wave radar high-resolution angle measurement method and device based on covariance fitting and medium
A millimeter-wave radar and covariance technology, applied in radio wave measurement systems, instruments, etc., can solve the problems of restricted resolution performance, high computational complexity, and increased radar hardware costs, and achieve low complexity and low computational complexity Effect
Active Publication Date: 2022-07-05
MICROCREATIVE TECH CO LTD
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Problems solved by technology
In common application fields, the aperture of the antenna cannot be very large, which leads to a large contradiction between the limited aperture of the antenna and the high angular resolution requirements of the millimeter-wave radar.
[0003]
In related technologies, fast Fourier transform (FFT) is used to estimate the angle, but the resolution performance of FFT is limited by the Rayleigh limit, which makes it unable to meet the requirements of high angle resolution.
Although the classic MUSIC algorithm can achieve angular super-resolution, it needs to know the number of targets in advance, and in practice, the determination of the number of targets has always been a difficult problem in the field of radar applications
In recent years, the sparse recovery algorithms without hyperparameters, such as SPICE and LIKES, etc., can achieve super-resolution in the angle dimension without knowing the number of signals, but their computational complexity is high. Higher power requirements will increase the hardware cost of the radar
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[0050] In order to make those skilled in the art better understand the solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only The embodiments are part of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the scope of protection of the present application.
[0051]The terms "first", "second", "third" and "fourth" in the description and claims of the present application and the drawings are used to distinguish different objects, rather than to describe a specific order. Furthermore, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive ...
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The invention discloses a millimeter wave radar high-resolution angle measurement method and device based on covariance fitting and a medium, and the method comprises the steps: constructing a radar data sampling covariance matrix according to array receiving data; performing discrete processing on an interested angle space in the radar data to obtain angle grid points, and constructing a calculation matrix according to the angle grid points; performing iterative calculation on the calculation matrix according to an alternating multiplier method, and obtaining a spatial spectrum according to a preset iteration termination condition; and converting the spatial spectrum into a target angle. According to the method, the number of signals does not need to be known in advance, the calculation complexity is low, and the requirements of millimeter wave radar angle measurement for a low-complexity and high-resolution algorithm can be effectively met.
Description
technical field [0001] The present application relates to the field of millimeter-wave radar, in particular to a method, device and medium for high-resolution angle measurement of millimeter-wave radar based on covariance fitting. Background technique [0002] Millimeter-wave radar has a wide range of applications in intelligent driving, indoor detection, intelligent transportation and other fields. These applications have a strong need for high angular resolution. For millimeter-wave radar, its angle resolution performance is limited by the aperture of the antenna. The larger the effective aperture of the antenna, the higher the resolution, and the smaller the antenna aperture, the worse the resolution. In common application fields, the aperture of the antenna cannot be very large, which leads to a great contradiction between the limited aperture of the antenna and the requirement for high angle resolution of the millimeter-wave radar. [0003] In the related art, a Fast ...
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IPC IPC(8): G01S7/41
CPCG01S7/41
Inventor 郑春弟罗俊刘文冬周春元高伟张慧
Owner MICROCREATIVE TECH CO LTD