A time-domain cancellation method and system for resisting main lobe constant mode interference
A time-domain and interference signal technology, applied in the field of anti-main lobe constant-modulus interference time-domain cancellation, can solve the problems of radar detection performance degradation, echo signal energy loss, etc., to achieve the effect of suppressing residual interference and improving accuracy
Active Publication Date: 2022-04-08
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
View PDF7 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] Based on this, the object of the present invention is to provide a time-domain cancellation method and system for resisting main lobe constant mode interference to solve the problem of radar detection performance degradation caused by echo signal energy loss and residual interference
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
[0049] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0050] The purpose of the present invention is to provide a time domain cancellation method and system against main lobe constant mode interference to solve the problem of radar detection performance degradation caused by echo signal energy loss and residual interference.
[0051] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunctio...
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 discloses a time-domain cancellation method and system for resisting main-lobe constant-mode interference. The method includes: acquiring a radar signal; determining a first cancellation signal according to the radar signal; performing time-domain cancellation on the first cancellation signal Variable filtering processing to obtain a time-varying filtering signal; determining a total residual interference signal according to the time-varying filtering signal; performing difference processing on the first cancellation signal and the total residual interference signal to obtain a second cancellation signal; Perform pulse compression processing on the second cancellation signal to obtain a pulse compression signal. The present invention uses a time-varying filter processing method to compensate for the 6dB loss of the pulse compression peak in the existing time-domain cancellation algorithm, thereby improving the accuracy of radar target detection; in addition, the present invention also suppresses residual interference, so that it may be submerged by residual interference Small targets can also be accurately detected, further improving the accuracy of radar target detection.
Description
technical field [0001] The invention relates to the technical field of interference time domain cancellation, in particular to a time domain cancellation method and system for resisting main lobe constant mode interference. Background technique [0002] The existing time-domain cancellation algorithm is mainly used in the radar anti-jamming method of noise frequency modulation jamming, and has the following defects: (1) After the time-domain cancellation, the amplitude of the radar echo signal is half of the true value, and after pulse compression processing , there will be a 6dB loss in the peak value of the pulse compression signal, which is not conducive to target detection. (2) Some interference signals still remain in the signal after time-domain cancellation, and these residual interference signals may submerge small targets, which is not conducive to target detection. Contents of the invention [0003] Based on this, the object of the present invention is to provid...
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): G01S7/28G01S7/292
CPCG01S7/2813G01S7/2928
Inventor 张劲东李晨丁逊尚东东徐乃清
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS