Sea clutter weak signal detection method based on two-dimension Duffing oscillator

Abstract

The invention discloses a sea clutter weak signal detection method based on a two-dimension Duffing oscillator, comprising steps of combining a quantum genetic algorithm and a random resonance algorithm and enhancing a useful object signal of a sea clutter signal to obtain an optimal detection result obtain an optimal detection result, adopting an improved heredity algorithm to optimize the Duffing chaotic oscillator, performing combined encoding on the coefficient to inteliigently obtain the optimal system parameter with an output signal to noise ratio as an evaluation function and with an signal to noise ratio gain as a determination index, performing self-adaptive random resonance processing on the sea clutter data detected by the IPIX radar according to the obtained parameter, and effectively detecting the object signal without damaging the useful signal. The invention is strong in resisting noise and greatly improves the system output signal to noise ratio, which overcomes the problem the traditional random resonance hand-operated parameter configuration or the single parameter optimization searching detection effect is not good. The invention expands the application range of the Duffing chaotic oscillator random resonance on detecting the signal of the small object and has a good application prospect.

Description

technical field [0001] The invention relates to the technical field of sea clutter data processing, in particular to a method for detecting weak signals of sea clutter based on a two-dimensional Duffing oscillator. Background technique [0002] Chaos is an unpredictable, random-like motion produced by a deterministic system. It is a bounded, non-periodic, but non-convergent process. Sea clutter refers to the echo signal of the radar irradiating the sea surface, which has chaotic characteristics. Experiments show that sea clutter is affected by the environment such as waves, sea wind, and tides, and has characteristics similar to noise. Radar can detect targets above or close to the sea. In this case, it is necessary to overcome the interference of the echo of the sea surface itself, that is, the weak target signal is submerged in the strong sea clutter, and a large number of sea clutter peaks will also cause serious false alarms. Therefore, the weak signal detection in the s...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the traditional weak target signal detection algorithm in the background of sea clutter, which is complex in calculation, low in prediction accuracy, and destroys useful signals while filtering out clutter signals.

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