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Hypersonic speed target speed measuring method

A hypersonic, target technology, applied in the fields of communication and radar signal processing, it can solve the problems of complex transmission modulation signal, large processing and calculation amount, etc., and achieve the effect of speed measurement without ambiguity, high precision, and overcoming speed measurement ambiguity.

Active Publication Date: 2016-12-07
XIDIAN UNIV
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  • Application Information

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Problems solved by technology

The disadvantage of this method is that the transmitted modulation signal is more complicated, and the follow-up processing has a large amount of calculation.

Method used

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  • Hypersonic speed target speed measuring method
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  • Hypersonic speed target speed measuring method

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Experimental program
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Embodiment Construction

[0044] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0045] refer to figure 1 , The specific implementation steps of the present invention are as follows.

[0046] Step 1: Transmit the signal.

[0047] The radar array elements transmit chirp signals to the target to be measured.

[0048] The radar elements emit the same chirp signal every cycle.

[0049] Step 2: Receive data.

[0050] The radar array element receives the echo of the chirp signal reflected by the target to be measured.

[0051] By collecting the echo of the target to be measured, the echo data is obtained, and the echo data is stored in the memory of the radar system.

[0052] Step 3: Perform delineation and frequency modulation processing on the echo data to obtain a difference frequency matrix.

[0053] The described echo data is delineated and tuned to obtain the difference frequency matrix is ​​realized according to the following formu...

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Abstract

The invention discloses a hypersonic speed target speed measuring method. The method mainly solves the problems of the complex emission of frequency modulation signals, the cross-distance unit correction of echoes and the unable ambiguity resolution of the speed in the prior art. The method comprises the steps of emitting linear frequency modulation type continuous wave signals by a radar array element; dechirping the received echo data and conducting the fourier transform treatment on the data to obtain a time-frequency matrix; constructing a spectrum coordinate matrix; obtaining the ambiguity based on the spectral line searching method; finally figuring out a to-be-measured target speed and outputting the target speed to a radar system. According to the technical scheme of the invention, the hypersonic speed target speed measurement is achieved. The hypersonic speed target speed measuring method is simple in signal emission, free of echo cross-distance unit correction, and not fuzzy in speed measurement.

Description

technical field [0001] The invention belongs to the technical field of communication, and further relates to a method for measuring the speed of a hypersonic target in the technical field of radar signal processing. The invention can be applied to shooting range measurement, precise guidance, high-speed target detection in near space and the like in the technical field of radar signal processing. Background technique [0002] The traditional method of linear frequency modulation continuous wave radar speed measurement uses the power spectrum estimation of periodogram method and the long-time accumulation algorithm based on Keystone (keystone) transform. The power spectrum estimation of the periodogram method mainly uses Fourier transform to convert the signal from the time domain to the frequency domain, and judges whether there is a target by detecting the spectral peak, and obtains the corresponding Doppler frequency. The long-term accumulation algorithm based on the Keys...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/58
CPCG01S13/583
Inventor 赵光辉刘永飞沈方芳石光明
Owner XIDIAN UNIV