Coherent agile frequency radar clutter inhibition method and system

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...

AI Technical Summary

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 the frequency agility performance of the radar and increase the radar system being detected by jammers. The probability of interception and tracking reduces the anti-jamming performance of the radar system

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