Frequency hopping radar transmission period design method based on optical bistable chaotic model

Abstract

The invention discloses a frequency hopping radar transmission period design method based on an optical bistable chaotic model. The method is characterized in that taking the maximization of the uncertainty of the frequency hopping period of a radar system as an optimization objective, the optical bistable model in the chaotic theory is utilized to generate a chaotic sequence with the pseudo-random, quasi-noise and non-periodic characteristic changes, and the mapping and normalization processing on the sequence in a radar frequency hopping period space is carried out, so that the self-adaptionoptimization design is carried out on the radar frequency hopping transmission period. The beneficial effects of the invention are that an optical bistable chaotic model is used for carrying out theoptimization design on the radar frequency hopping transmission period, and the frequency hopping period with the pseudo-random, quasi-noise and non-periodic characteristic changes, the maximum uncertainty of the signal parameters of the frequency hopping radar is maximized, and therefore the radio frequency stealth performance of the radar system is improved.

Description

technical field [0001] The invention relates to a method for designing a frequency-hopping radar emission cycle based on an optical bistable chaotic model, and belongs to the technical field of radar frequency-hopping cycle design. Background technique [0002] In modern electronic warfare, stealth is a key factor for aircraft to improve its survivability and defense penetration capabilities, and it is also an important condition to ensure that the enemy is discovered and attacked first in warfare. Since the U.S. Defense Advanced Research Projects Agency in the mid-1970s took the lead in conducting research on aircraft stealth technology, after nearly half a century of development, all military powers in the world have made great progress and development in aircraft stealth technology. Various new stealth fighters emerge in an endless stream, and stealth aircraft are playing an increasingly important role on the modern battlefield. Outstanding representatives of stealth air...

AI Technical Summary

Problems solved by technology

[0006] Although the traditional method puts forward the design idea of ​​radar frequency hopping signal, which increases the uncertainty of radar signal parameters and improves its radio frequency stealth performance, these methods do not consider the uncertainty of frequency hopping transmission cycle, and the frequency hopping The period is a fixed value, and the enemy passive detection system can still estimate the radar signal through characteristic parameters such as frequency hopping rate and frequency hopping frequency set, so as to realize the interception, sorting and identification of airborne radar frequency hopping signal

In addition, although the currently commonly used Logistic chaotic map has good sequence randomness, it is widely used and its form is too simple. The enemy is easy to attack and decipher, and its security performance is poor; The frequency hopping cycle is prone to clustering

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