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Highly-maneuvering target micro cycle calculation method and highly-maneuvering target micro cycle calculation system

A technology of high maneuvering target and micro-movement period, which is applied in the field of radar, can solve the problem of micro-movement period estimation and other problems, and achieve the effect of accurate and effective target micro-movement period

Active Publication Date: 2016-03-30
BEIJING INST OF RADIO MEASUREMENT
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Problems solved by technology

[0004] In the prior art, the fretting period estimation problem has not been considered when the target Doppler frequency is ambiguous

Method used

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  • Highly-maneuvering target micro cycle calculation method and highly-maneuvering target micro cycle calculation system

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Embodiment Construction

[0061] The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.

[0062] A method for calculating the micro-movement period of a highly maneuverable target in this embodiment, such as figure 1 Specifically, the following steps are included:

[0063] Step 1, the radar collects the echo x of the target, x={x 1 ,x 2 ,...,x i ,...,x N}, i=1,2,...,N, N is the pulse accumulation number, x i is the value of the echo signal x at the i-th pulse time.

[0064] In step 2, the estimated value of the overall translation of the target is calculated according to the echo signal of the target.

[0065] (A) Perform short-time Fourier transform on the echo signal x:

[0066] X M × N = ...

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Abstract

The invention relates to a highly-maneuvering target micro cycle calculation method and a highly-maneuvering target micro cycle calculation system. The method comprises the following steps: step 1, acquiring an echo signal x of a target, wherein x={x1, x2,..., xi,..., xN}, i=1, 2,..., N, N is the number of pulses accumulated, and xi is the value of the echo signal at the ith point; step 2, calculating the overall translation estimated value of the target according to the echo signal of the target; step 3, using the overall translation estimated value of the target to compensate overall translation to obtain a micro signal after compensation; and step 4, estimating the cycle of the target according to the micro signal after compensation. According to the method of the invention, by processing Doppler ambiguity of the target and compensating the overall translation of the target, the estimated micro cycle of the target is more accurate and effective.

Description

technical field [0001] The invention belongs to the technical field of radar, and in particular relates to a method for estimating target motion parameters, which can be used to calculate the micro-motion period of high maneuvering targets with fuzzy Doppler frequency. Background technique [0002] Micro-motion is caused by the change of the target's own posture or maneuver when the target is moving, and contains more detailed motion characteristics of the target. For the estimation of micro-motion parameters, there is an urgent need in the fields of target measurement and control and target recognition. In recent years, the international research on micro-motions has gradually heated up, and the micro-motions in radar and the micro-Doppler phenomenon caused by micro-motions are increasingly becoming research hotspots. If the radar target has micro-motions such as overall or partial vibration or rotation in addition to the translational motion of the main body, an additiona...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/41
CPCG01S7/41
Inventor 李彦兵李飞高红卫陈大庆叶春茂
Owner BEIJING INST OF RADIO MEASUREMENT
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