Method for resisting interference by corner reflector based on polarimetric radar
A technology of corner reflector and polarized radar, which is applied in the direction of instruments, radio wave measurement systems, etc., can solve the problem of being unable to resist passive interference of corner reflectors
Inactive Publication Date: 2018-01-26
SHANGHAI RADIO EQUIP RES INST
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This method is suitable for working between two radars with different polarization methods, and cannot resist passive interference from corner reflectors
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[0072] The present invention will be further elaborated below by describing a preferred specific embodiment in detail in conjunction with the accompanying drawings.
[0073] Such as figure 1 Shown, the present invention a kind of method based on polarization radar anti-corner reflector interference, comprises following process:
[0074] Step S1, the ship model and the corner reflector are subjected to radar echo sampling in the field, and the echo data are processed to extract the full polarization scattering matrix data.
[0075] Step S2. Calculate the polarization invariant at each frequency point according to the above-mentioned full polarization scattering matrix data; the above-mentioned polarization invariant includes: determinant modulus, power matrix trace, combined invariant coefficient, target polarization shape factor, Scattering total energy, radial length, frequency domain response characteristics, and frequency sensitivity are two parameters P and Q.
[0076] S...
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The invention discloses a method for resisting the interference by a corner reflector based on a polarimetric radar. The method includes the following steps: an external field performing radar echo sampling on a ship model and a corner reflector, processing the echo data, extracting fully polarimetric scattering matrix data of the echo data; based on the fully polarimetric scattering matrix data,calculating the polarimetric invariant under each frequency point; saving the polarimetric invariant data that is calculated in a database, the polarimetric invariant data serving as training samplesof a SVM classifier; the radar transmitting a single-frequency signal, the polarimetric radar performing real-time acquisition on the echo data, calculating polarimetric features, forming test samples, finding the training samples from the database that correspond to the frequencies of the echo data which are real-timely acquired by the radar, and verifying the ship and the corner reflector by using the SVM classifier. According to the invention, the method herein is less influenced by environment, requires less computing compared with polarimetric analysis, has the characteristics of real-timeness and easy implementation, and can be applied to identifying the interference from other false targets.
Description
technical field [0001] The invention relates to the field of all-polarization radar, in particular to a method for anti-jamming of a polarized radar by a corner reflector. Background technique [0002] The polarization information of a radar target is directly related to its structure, material, shape, attitude orientation and so on. Through the extraction of polarization information, features that are difficult to characterize by other parameters such as target surface roughness, symmetry, and orientation can be obtained, which is indispensable for a complete description of target characteristics. [0003] Directly use the target scattering matrix or extract the polarization characteristics of the target from the power matrix. The polarization parameters and polarization invariants obtained from the scattering matrix determine the backscattering characteristics of the target at a given attitude, which is the maximum amount of target information that the radar can obtain fr...
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IPC IPC(8): G01S7/292G01S7/02
Inventor 王文晴刘凯邹波黄勇江利中胡鑫
Owner SHANGHAI RADIO EQUIP RES INST