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Monopulse foresight imaging processing method of missile-borne/airborne radar

An airborne radar, forward-looking imaging technology, applied in the field of signal processing

Inactive Publication Date: 2012-10-24
BEIHANG UNIV
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Problems solved by technology

[0006] The purpose of the present invention is to solve the problem of forward-looking radar imaging processing, and proposes a single-pulse forward-looking imaging processing method for missile-borne / airborne radar

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  • Monopulse foresight imaging processing method of missile-borne/airborne radar
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  • Monopulse foresight imaging processing method of missile-borne/airborne radar

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Embodiment Construction

[0049] The present invention will be further described in detail below with reference to the drawings and embodiments.

[0050] The present invention is a single pulse forward-looking imaging processing method for missile-borne / airborne radar, and the process is as follows figure 1 As shown, including the following steps:

[0051] Step 1: Distance compression processing

[0052] Range compression processing is the prerequisite of forward-looking imaging processing. On the one hand, it completes range compression processing to achieve distance target separation; on the other hand, distance target separation can reduce mutual interference between different targets and improve subsequent azimuth detection. Angular accuracy. The present invention adopts distance matching filter processing to complete distance focusing processing, and realizes distance separation of targets. Firstly, the sum channel echo signal and the difference channel echo signal are subjected to range Fourier trans...

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Abstract

The invention provides a monopulse foresight imaging processing method of a missile-borne / airborne radar and belongs to the field of signal processing. First, focus processing in the range direction is finished through matched filtering processing in the range direction, and separation in the range direction of a ground target is achieved, then, distance cell migration correction processing is finished according to a relative position between a radar platform and a target area, and finally accumulation of azimuth energy is achieved through locating of the azimuth direction by using monopulse angle measurement technology, and a final imaging processing result is obtained. The processing method aims at removing a relative motion phenomenon existing between the radar carrier platform and the ground, and the relative motion between a radar carrier platform and the ground target is corrected through motion compensation processing, so that effects of the relative motion on the angle measurement are reduced, and difficulty of following locating is relieved. Pulse pressure processing in the range direction and a range cell migration correction angle measurement method are combined, and precision of the angle measurement is improved.

Description

Technical field [0001] The invention belongs to the field of signal processing, and relates to a forward-looking imaging processing method, in particular to a single-pulse forward-looking imaging processing method for missile-borne / airborne radar. Background technique [0002] The radar system completes the detection of ground targets by transmitting electromagnetic scattering signals to the ground and receiving backscattered signals from ground targets. In the range, pulse compression technology is used to improve the spatial resolution of the range and realize the separation of ground targets. In the azimuth direction, the Doppler frequency change caused by the relative movement between the ground target and the radar platform is used to improve the spatial resolution of the azimuth direction. However, when the target area is in the front area of ​​the radar platform, the antenna beam is in a forward-looking state, and the Doppler frequency of the target area is almost zero. As...

Claims

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Application Information

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IPC IPC(8): G01S13/89
Inventor 王鹏波何岷刘月珊陈杰杨威门志荣
Owner BEIHANG UNIV
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