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Radio frequency stealth datalink emitting state acquiring method based on maximum conditional entropy

A technology of transmitting state and radio frequency stealth, applied in the field of radio frequency stealth data link, which can solve the problems of limited radio frequency stealth performance, weak adaptive planning ability of transmit state, and no uncertainty of transmit state.

Inactive Publication Date: 2014-03-26
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0009] Although the above two methods have considered battlefield environmental factors and have certain environmental adaptability, they rely on fixed thresholds to work, and the adaptive planning ability of the launch state is weak, and the burst communication using the above methods does not have the maximum potential. Uncertain launch status, limited radio frequency stealth performance

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  • Radio frequency stealth datalink emitting state acquiring method based on maximum conditional entropy
  • Radio frequency stealth datalink emitting state acquiring method based on maximum conditional entropy
  • Radio frequency stealth datalink emitting state acquiring method based on maximum conditional entropy

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Embodiment Construction

[0032] Combine below figure 1 , figure 2 , image 3 The structure and working process of the present invention are further described.

[0033] 1. Determine the statistical characteristics of the sample space

[0034] The maximum conditional entropy method proposed by the present invention uses prior experience data as a sample space, uses the statistical characteristics of the sample space to construct a Lagrangian function, and determines the maximum conditional entropy probability distribution model p of burst communication * (y|x), therefore, the statistical characteristics of the sample space should be determined first. Considering the requirements of the battlefield environment, the burst communication data link should meet the following constraints: the greater the threat factor σ in the target area, the lower the launch probability of the data link. The constraints that are assumed to be satisfied by the sample space are shown in Table 1 below:

[0035] Table 1 Co...

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Abstract

The invention discloses a radio frequency stealth datalink emitting state acquiring method based on maximum conditional entropy. A prior environmental threat factor x and a prior datalink emitting state y in historic radio frequency stealth data serve as sample spaces. Firstly, the probability density function of the sample space x, the joint probability density function of the sample space x and the sample space y and the characteristic functions of the sample space x and the sample space y are respectively worked out; secondly, a maximum conditional entropy distribution function expression is worked out by building a Lagrange function; thirdly, unknown coefficients in the maximum conditional entropy distribution function expression are worked out, and a maximum conditional entropy distribution function is acquired; fourthly, environment thread factors acquired by situation awareness equipment are input into the maximum conditional entropy distribution function, and a datalink emitting state with the largest uncertainty is acquired.

Description

technical field [0001] The invention belongs to the technical field of radio frequency stealth data links, and in particular relates to a method for acquiring the transmission state of radio frequency stealth data links based on maximum conditional entropy. Background technique [0002] Radio frequency stealth technology is a new stealth technology proposed in recent years to counter passive detection systems. This technology effectively prevents the active radiation source from being intercepted, sorted, identified and positioned by passive electronic reconnaissance equipment through characteristic control. Compared with radar stealth and infrared stealth, radio frequency stealth technology is different. It does not reduce target characteristics without limit, but effectively controls target characteristics on the basis of meeting equipment function and performance requirements, and improves its low interception performance. [0003] Based on the theory of radio frequency ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
Inventor 杨宇晓周建江汪飞陈军李海林康国华
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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