Coherent agile frequency radar clutter inhibition method and system

A technology of clutter suppression and frequency agility, which is applied in the field of radar signal processing, can solve the problems of increasing the probability of radar system interception and tracking, the decline of radar system anti-jamming performance, and affecting the performance of radar frequency agility, so as to improve the signal-to-noise ratio , low calculation, the effect of suppressing clutter energy

Active Publication Date: 2015-09-23
TSINGHUA UNIV
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Problems solved by technology

However, in the radar system using this method, the number of pulses in the group limits the number of coherently accumulated pulses, and when there are too many pulses in the group, it will affect t...

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  • Coherent agile frequency radar clutter inhibition method and system
  • Coherent agile frequency radar clutter inhibition method and system
  • Coherent agile frequency radar clutter inhibition method and system

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Embodiment Construction

[0071] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0072] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner" and "outer" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and Simplified descriptions, rather than indicating or implying that the device or element refe...

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Abstract

The invention discloses a coherent agile frequency radar clutter inhibition algorithm, comprising: arranging radar base-band echo signals to perform clutter inhibition and coherent integration in an echo signal matrix; calculating the matrix to inhibit clutter components in the echo signals and reserve signal components in a movable target; and performing coherent integration on the echo signals after clutter inhabitation. The invention also discloses a coherent agile frequency radar clutter inhibition system corresponding with the algorithm, comprising a signal arrangement module, a clutter inhibition module and a coherent integration module. The algorithm can effectively inhibit clutter energy, obtain radial motion speed information of a target at the same time of detecting a movable target, and meanwhile obtain a high resolution range profile of the target so as to realize simultaneous high resolution detection of speed and range of the target; the algorithm has lower calculated amount, and can inhibit clutter components in signals, increase a signal to noise ratio of the target, and obtain speed information and high resolution images of the target.

Description

technical field [0001] The invention relates to the technical field of radar signal processing, and can be applied to signal clutter suppression and target detection in coherent frequency-agile radars. Background technique [0002] Frequency agility between transmitted pulses is an important means of radar anti-jamming. For radar reconnaissance aircraft and jammers, the operating frequency of the radar to be reconnaissance is one of the most concerned technical parameters. Only by accurately understanding the working frequency of the radar being reconnaissance can we effectively locate, suppress and deceive. From another perspective, by continuously changing the transmission frequency between pulses, radar can effectively deceive and interfere with the work of reconnaissance aircraft, so as to achieve the purpose of not being easily detected, measured and interfered. Frequency agility has long been considered the most effective means of radar anti-jamming. [0003] Freque...

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Application Information

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IPC IPC(8): G01S7/36
CPCG01S7/2813
Inventor 刘一民王希勤张晨路张祎博文俊杰
Owner TSINGHUA UNIV
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