A Method for Acquiring Transmission State of Radio Frequency Stealth Data Link Based on Maximum Conditional Entropy

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 ...

AI Technical Summary

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

Images