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Airborne radar frequency hopping cycle design method based on Hybrid chaotic mapping

An airborne radar and chaotic mapping technology, applied to radio wave measurement systems, instruments, etc., to achieve the effect of meeting the maximum uncertainty, improving radio frequency stealth performance, and making it difficult to attack and decipher

Inactive Publication Date: 2018-04-24
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
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Problems solved by technology

[0005] The main technical problem to be solved by the present invention is: Utilize the Hybrid chaotic sequence to optimize the design of the frequency hopping transmission period of the airborne radar, generate a frequency hopping period with pseudo-random, noise-like and aperiodic characteristic changes, and maximize the airborne frequency hopping radar The maximum uncertainty of signal parameters, thus improving the radio frequency stealth performance of airborne radar

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  • Airborne radar frequency hopping cycle design method based on Hybrid chaotic mapping
  • Airborne radar frequency hopping cycle design method based on Hybrid chaotic mapping
  • Airborne radar frequency hopping cycle design method based on Hybrid chaotic mapping

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Embodiment Construction

[0024] The structure and working process of the present invention will be further described below in conjunction with the accompanying drawings.

[0025] 1. Determine the Hybrid chaotic map parameters and the initial value of the system

[0026] The invention proposes a design method of airborne radar frequency hopping period based on Hybrid chaotic mapping. It takes into account the initial value sensitivity of the chaotic sequence, therefore, the parameter μ in the Hybrid chaotic map should be determined first 1 , μ 2 , b and the system initial value x 0 .

[0027] 2. Generate Hybrid chaotic sequence

[0028] The Hybrid chaotic map is used to design the frequency hopping period of the airborne radar. The Hybrid chaotic map is as follows:

[0029]

[0030] where μ 1 , μ 2 and b are system parameters, x k represents the sequence value of the kth iteration, x k+1 Indicates the sequence value at iteration k+1. for all x k ∈(-1,1), at a given parameter μ 1 , μ 2 ,...

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Abstract

The invention discloses an airborne radar frequency hopping cycle design method based on Hybrid chaotic mapping. The main task to be accomplished by the airborne radar frequency hopping cycle design method is characterized in that the maximization of uncertainty of an airborne radar frequency hopping cycle as an optimization object, a chaotic sequence with pseudo-random, noise-like and aperiodic characteristic variations is generated by utilizing Hybrid mapping in a chaos theory, the chaotic sequence is subjected to mapping and normalization processing in an airborne radar frequency hopping cycle space, thus a self-adaptive optimization design is carried out for the airborne radar frequency hopping cycle. Compared with the prior art, the airborne radar frequency hopping cycle design methodbased on Hybrid chaotic mapping provided by the invention satisfies the maximum uncertainty of radar signal parameters, is conductive to improving RF stealth performance of an airborne frequency hopping radar, has good safety of Hybrid chaotic mapping, and is not easy to attack and decode.

Description

technical field [0001] The invention belongs to the technical field of radar frequency hopping cycle design, and specifically proposes an airborne radar frequency hopping cycle design method based on Hybrid chaotic mapping. Background technique [0002] Aircraft radio frequency stealth technology, as an important active stealth technology, is an important means to counter the enemy's passive detection system and ensure that fighter jets and their formations find, attack and destroy the enemy first. Specifically, aircraft radio frequency stealth technology refers to the stealth technology of airborne radar, data link, altimeter and other airborne active electronic equipment to resist interception, sorting, and identification of enemy passive detection systems, so as to reduce the risk of passive detection systems. The interception probability and interception distance are the goals, so as to improve the aircraft's battlefield survivability and penetration capability. Aircraf...

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Application Information

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IPC IPC(8): G01S7/02
CPCG01S7/02
Inventor 时晨光汪飞李海林周建江夏伟杰
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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