A speed estimation method for high-speed target phase based on frequency modulation step signal
A high-speed target, frequency modulation step technology, applied in the field of signal processing, to achieve the effect of small calculation amount, compensation pulse defocusing, and meet the needs of engineering applications
Active Publication Date: 2021-11-26
BEIJING INSTITUTE OF TECHNOLOGYGY
View PDF2 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0004] The purpose of the present invention is to overcome the defects of the prior art, in order to solve the problem of accurate speed measurement of high-speed targets, and propose a method for phase estimation of high-speed targets based on frequency modulation step signals
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
[0032] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention.
[0033] The embodiment of the present invention provides a high-speed target phase estimation method based on frequency modulation step signal,
[0034] First, establish a high-speed target echo model based on the frequency modulation step signal transmitted by the radar; then perform matching pulse pressure processing on a single pulse, and analyze the influence of the high-speed movement of the target on the intra-pulse modulation of the echo, which is mainly reflected in the envelope movement caused by the speed. high-order phase items, etc.; then the feasibility of envelope walking and high-order phase item compensation was analyzed, and on this basis, the c...
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 present invention provides a high-speed target phase estimation method based on frequency modulation step signal. The specific process is as follows: step 1, establish a high-speed target echo model based on frequency modulation step signal, and consider the pulse time in the process of establishing the model The influence of modulation on the target echo time delay; step 2, perform matching pulse pressure processing on a single pulse on the echo model, and compensate for the quadratic phase item existing in the spectrum phase during pulse pressure processing; step 3, process the pulse pressure The results after compression processing are subjected to coherent synthesis processing to obtain a one-dimensional high-resolution range image; Step 4, based on the one-dimensional high-resolution range image, the phase estimation speed is realized. The invention establishes a high-speed target echo model considering intrapulse Doppler modulation, and derives a phase estimation velocity model considering acceleration, which is applicable to high-speed targets whose radial motion includes acceleration and jerk, and meets engineering application requirements.
Description
technical field [0001] The invention belongs to the technical field of signal processing, and in particular relates to a method for phase estimation of a high-speed target based on a frequency modulation step signal. Background technique [0002] With the rapid development of radar technology, people put forward higher requirements for radar accurate measurement. For example, micro-motion extraction is a research hotspot in target detection and recognition. The key problem is that the translation compensation is not accurate enough, the micro-motion amplitude is small, and the scattering points are difficult to distinguish. The micro-motion feature information is not obvious, which makes the micro-motion extraction very difficult. Big. The most effective way to break through this bottleneck is to improve the radar's ability to describe fine motion, that is, to improve the radar's ability to accurately measure speed. The accuracy of traditional envelope ranging is limited. ...
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): G01S13/522G01S7/41
CPCG01S7/41G01S7/418G01S13/522
Inventor 范花玉李文吉毛二可任丽香
Owner BEIJING INSTITUTE OF TECHNOLOGYGY