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Stepped frequency radar signal target extract method based on statistic optimum

A frequency stepping radar and target extraction technology, applied in radio wave measurement systems, measurement devices, instruments, etc., can solve problems such as unclear physical meaning, large amount of calculation, and false peaks, and achieve the effect of improving coverage probability.

Active Publication Date: 2015-04-15
CNGC INST NO 206 OF CHINA ARMS IND GRP
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Problems solved by technology

The disadvantage is that the amount of calculation is large, and false peaks will appear when there is a distance to walk, and the physical meaning of the addition is not clear

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  • Stepped frequency radar signal target extract method based on statistic optimum
  • Stepped frequency radar signal target extract method based on statistic optimum
  • Stepped frequency radar signal target extract method based on statistic optimum

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Embodiment Construction

[0054] Now in conjunction with embodiment, accompanying drawing, the present invention will be further described:

[0055] Now in conjunction with embodiment, accompanying drawing, the present invention will be further described:

[0056] The solution of the present invention to solve the technical problem is: first perform IFFT on the same distance unit points in different pulse repetition periods in one frame of data, and perform cyclic shift alignment on the basis of a certain coarse distance sampling point for the results after IFFT, which is simple For this reason, the “0th” coarse-distance sampling point can be selected as the reference, and then the data in each subsequent coarse-distance sampling point can be cyclically shifted, so that the same segment of fine-sampling distance in each coarse-distance sampling point is within the target real It is continuous in distance, which is called "alignment" processing in this algorithm. After the data is "aligned", the "align...

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Abstract

The invention relates to a stepped frequency radar signal target extract method based on statistic optimum, aims to remove distance mismatching redundancy between a distance range represented by a stepping signal after distance refining IFFT and a distance range represented by a present echo sampling value, and over-sampling redundancy, and solves the problem that a 0th sampling point needs to be calibrated in both a classical algorithm abandoning method and a maximum selecting method, or else a target point cannot be sampled possibly. The key idea of the algorithm is as follows: circulation displacement algorithm is performed on the result of one frame of data after IFFT, rough distance sampling dimension overlapping is performed on aligned data, and a part of data is spliced by taking an overlapped maximum value as a center, so that both points with relatively large amplitudes in identical distance are extracted, and the problem that the 0th sampling point needs to be calibrated in the classical algorithm is also solved.

Description

technical field [0001] The invention belongs to a radar signal target extraction method, in particular to a statistically optimal frequency step radar signal target extraction method, which is used to remove the distance range represented by the frequency step signal IFFT distance refinement and the current echo sampling value The distance mismatch redundancy between the indicated distance ranges, and the oversampling redundancy. Background technique [0002] The step frequency signal is an important high-range high-resolution radar signal. It transmits a series of radar pulses with linear carrier frequency jumps, and then obtains the effect of high-range high-resolution synthesis through IFFT processing on the pulse echo. The frequency stepping signal is a composite broadband signal, which decomposes the broadband signal into multiple narrowband signals in the frequency domain, and obtains the composite broadband information by sending and receiving multiple narrowband sign...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/41
CPCG01S7/2923G01S7/2883
Inventor 罗丁利戴巧娜郭鹏程
Owner CNGC INST NO 206 OF CHINA ARMS IND GRP
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