A multi-channel calibration method for chirp signal mimo radar system
A chirp signal and radar system technology, applied in the field of radar detection, can solve the problems of high complexity and cost, inconsistent amplitude and phase, imaging defocus, etc., and achieve the effect of simple and easy implementation of the calibration method
Active Publication Date: 2022-03-25
苏州理工雷科传感技术有限公司
View PDF9 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Due to the extremely short wavelength of the millimeter wave, the inconsistency in the length and bending of the connecting cables between multiple channels, or the slight differences in connectors, antennas, etc. will cause inconsistencies in amplitude and phase between multiple channels, resulting in problems such as imaging defocus
At present, for the inconsistency of amplitude and phase between multiple channels in MIMO systems, internal calibration systems or high-precision calibration components are mainly used to measure and correct the amplitude and phase differences between multiple channels, and these methods will greatly increase the requirements for system hardware. high complexity and cost
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0044] In order to make those skilled in the art better understand the solutions of the present application, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application.
[0045] like figure 1 As shown, a multi-channel calibration method of a chirp signal MIMO radar system is characterized in that, it includes the following steps:
[0046] S1: Place the MIMO radar system in an outdoor open area, and place a strong reflection target at a position facing the radar and the vertical distance from the radar is a set distance R, wherein the MIMO radar system includes N t transmit antennas and N r receiving antennas, then N=N t ×N r transceiver channels, and N t with N r at least 2.
[0047] For example, as figure 2 As shown, place the MIMO radar system in an outdoor open area, and place a strong reflective target, such as a co...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention provides a multi-channel calibration method for a linear frequency modulation signal MIMO radar system. Firstly, a strong scattering target is set at a position facing the radar as an auxiliary calibration device, and secondly, the phase correction factor and amplitude are obtained through the echo data corresponding to the strong scattering target. The correction factor and the distance correction factor realize the accurate extraction of the amplitude and phase inconsistency parameters between the transmitting and receiving channels in the case of the chirp signal MIMO radar system sending a large bandwidth signal. Finally, according to the three correction factors, the echo data and the Imaging distance is corrected; it can be seen that the present invention realizes high-precision calibration of the inconsistency of amplitude and phase between multiple channels, and only needs a simple auxiliary correction device to achieve the calibration accuracy that meets the imaging requirements, which can eliminate the traditional The complex internal calibration device and high-precision calibration parts in the method, the overall calibration method is simple and easy to implement, and solves the problems of high cost and high complexity caused by traditional internal calibration systems, high-precision calibration parts or complicated processing methods.
Description
technical field [0001] The invention belongs to the technical field of radar detection, and in particular relates to a multi-channel calibration method of a linear frequency modulation signal MIMO radar system. Background technique [0002] my country is one of the countries with the most serious geological disasters and the most threatened population in the world. Landslide disasters are the most frequently occurring and most harmful type of geological disasters. The traditional non-contact measurement methods mainly include close-range photogrammetry, laser scanning measurement and spaceborne differential interferometry. , high resolution, continuous detection and other advantages, has become a research hotspot. However, due to the comprehensive advantages of the linear frequency modulated continuous wave system in dynamic range, scanning speed, hardware implementation, etc., it has become a common signal system for MIMO slope deformation monitoring radar. [0003] In or...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/40
CPCG01S7/4052G01S7/406
Inventor 王宏宇于慧姚迪江志远戴颖超
Owner 苏州理工雷科传感技术有限公司