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Method for detecting coherent integration of radar target based on generalized Doppler filter bank

A Doppler filter and coherent accumulation technology, applied in the field of radar target coherent accumulation detection, can solve the problems of high cost, complex blind speed processing, high complexity, etc., to overcome the walking effect and improve the speed measurement resolution and the effect of precision

Inactive Publication Date: 2010-06-16
TSINGHUA UNIV
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Problems solved by technology

[0006] In order to overcome the defects of high cost, high complexity, complex blind speed processing and low speed measurement accuracy in existing radar target detection, the present invention proposes a radar target coherent accumulation detection method based on generalized Doppler filter bank

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  • Method for detecting coherent integration of radar target based on generalized Doppler filter bank
  • Method for detecting coherent integration of radar target based on generalized Doppler filter bank
  • Method for detecting coherent integration of radar target based on generalized Doppler filter bank

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Embodiment Construction

[0047] The following describes in detail a method for coherent accumulation detection of radar targets based on a generalized Doppler filter bank provided by the present invention according to the drawings and specific embodiments.

[0048] In the prior art, in the detection method using long-term coherent accumulation, Perry et al. first introduced the Keystone transform into the radar field, aiming at synthetic aperture radar (SAR) moving targets composed of time-domain pulse sampling and frequency-domain echo sequences Signal, through the introduction of new time variables and interpolation processing to achieve echo range walk and speed decoupling (RPPerry, RCDipietro, RLFante, "SAR Imaging of Moving Targets", IEEE Transaction on Aerospace and Electronic System, Vol.35, No .1, Jan. 1999, pp. 188-200). According to the nature of Keystone, Zhang Shunsheng and others introduced it into the field of long-term accumulation detection of targets, and proposed a weak target detection...

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Abstract

The invention relates to a method for detecting coherent integration of a radar target in the field of radar technology. The method comprises the following steps of: determining the pulse count of the coherent integration according to motion characteristics and detection indexes of the radar target; determining the search speed channel interval and the number of Doppler filters, and searching the distance interval and the distance unit number; determining vectors of the Doppler filters; obtaining a coherent integration result along with a straight line determined by the search speed and the search distance; traversing all the search speed and the search distance to acquire a parameter transformation data matrix; and performing constant false alarm detection on the parameter transformation data matrix to acquire trace point information of the radar target. The method overcomes the span length unit walking effect on a constant speed target during the time period of the coherent integration, selects data along with the straight line without shifting and interpolating operations, needs no repetition frequency staggering to acquire target non-fuzzy speed estimation, is suitable for low repetition frequency long-range radar application, and has high speed testing resolution ratio and accuracy.

Description

Technical field [0001] The present invention relates to the field of radar technology. More specifically, the present invention relates to a method for coherent accumulation detection of radar targets based on a generalized Doppler filter bank. Background technique [0002] The detection environment of modern radars is becoming increasingly complex. In addition to external factors such as strong ground clutter, electronic interference, and low-altitude penetration, the detection complexity also comes from the changes in the detection target. For modern warning radars, a large number of stealth, high-altitude, high-speed targets pose severe challenges to the high-performance detection of targets. On the one hand, the radar reflection cross-sectional area (RCS) is drastically reduced by stealth design for aircraft, ships and other targets; on the other hand, due to the improvement of aircraft technology, a large number of high-altitude and high-speed targets have emerged, and the m...

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Application Information

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IPC IPC(8): G01S7/41
Inventor 许稼彭应宁余吉王秀坛
Owner TSINGHUA UNIV
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