Friend or foe identification signal code rate calculation method based on Haar transform

A calculation method and identification technology of friend or foe, applied in the field of code rate calculation of identification friend or foe signal based on Haar transform, can solve the problems of relatively large fluctuation of code rate calculation error and large amount of calculation, and achieve the reduction of sampling rate, strong detection ability, calculation volume reduction effect

Active Publication Date: 2021-08-13
深圳华创电科技术有限公司
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a method for calculating the code rate of the identification friend or foe signal based on Haar transform, to solve the problem that the existing calculation method for the code rate of the identification friend or foe signal has a large amount of calculation, and when the signal-to-noise ratio is unstable, the code rate The calculation error fluctuation is relatively large

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  • Friend or foe identification signal code rate calculation method based on Haar transform
  • Friend or foe identification signal code rate calculation method based on Haar transform
  • Friend or foe identification signal code rate calculation method based on Haar transform

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[0038] The present invention is best understood by reference to the detailed drawings and descriptions set forth herein. In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.

[0039] The present invention provides a method for calculating code rate of IFF signal based on Haar transform, the algorithm principle is as follows: figure 1 shown, including the following steps:

[0040]S1. Signal sampling: Convert the acquired signal to obtain an intermediate frequency signal, and use AD to sample the intermediate frequency signal in real time to obtain continuous sampling data; AD preferably uses 200Mbps bandpass to sample the intermediat...

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Abstract

The invention relates to a friend or foe identification signal code rate calculation method based on Haar transform. The method comprises the following steps: firstly sampling an intermediate frequency signal, then intercepting a burst IFF signal in real time by employing a channelization parallel detection technology, obtaining the accurate frequency of the IFF signal through an instantaneous phase difference frequency measurement technology, and therefore, calculating the optimal multi-resolution analysis scale factor of the IFF signal; performing Haar wavelet transform on the intercepted IFF signal under the optimal multi-resolution analysis scale factor to obtain a feature vector parameter of the IFF signal in a wavelet transform domain, then performing singular point domain separation and curve fitting on the feature vector parameter, and synchronously calculating a feature value of the feature vector parameter in real time; and establishing a feature vector space of a tree structure according to the feature value, and judging and calculating the accurate code rate of the IFF signal. According to the invention, the calculation amount and the calculation error of the identification friend or foe signal code rate can be effectively reduced.

Description

technical field [0001] The invention relates to the field of signal code rate calculation, in particular to a method for calculating the signal code rate of IFF based on Haar transformation. Background technique [0002] Mark XIIA IFF system is an upgraded version of Mark XII, adding Mode5 on the original basis. The Mode5 system adopts secure information format and data transmission technology, which improves the system's security, anti-interference and battlefield situation awareness capabilities, and can be used for air-to-ground, ground-to-air, air-to-air, sea-to-sea and other combat identification. At present, the military surveillance platforms of the U.S. military and NATO allies, such as E-3B AWACS, E-2C early warning aircraft, and Aegis combat systems have been equipped with Mode5 IFF systems, and the IFO systems of air, ground, and surface combat platforms are also being upgraded to Mode5 system [0003] One of the typical features of the Mode5 system is that all ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B17/30
CPCH04B17/30Y02D30/70
Inventor 朱波赵昱杰
Owner 深圳华创电科技术有限公司
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