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Radio signal carrier frequency estimation method based on generalized cyclic correlation entropy

A radio signal, carrier frequency technology, applied in the field of signal processing, to avoid failure, improve robustness, and highly unified

Active Publication Date: 2017-12-26
DALIAN UNIV OF TECH +1
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Problems solved by technology

[0003] The problem to be solved in the present invention is to use the new method of circular correlation entropy to remove Gaussian noise, impulse noise and two kinds of mixed noise simultaneously

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  • Radio signal carrier frequency estimation method based on generalized cyclic correlation entropy
  • Radio signal carrier frequency estimation method based on generalized cyclic correlation entropy
  • Radio signal carrier frequency estimation method based on generalized cyclic correlation entropy

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Embodiment Construction

[0041] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the drawings in the embodiments of the present invention:

[0042] A. Using known signals, calculate the correlation function of the signal in the Euclidean space and the correlation entropy in the Hilbert space.

[0043] A1. Calculate the correlation function R of the signal in the Euclidean space xy (t,τ);

[0044] In this example, the analog AM signal is selected: x(t)=a(t)cos(2πf c t), y(t)=x(t+τ); R xy (t,τ)=E[x(t)y(t)]=E[x(t)x(t+τ)]; where f c =200Hz,f m =10Hz,τ=0.9s;

[0045] A2. Calculate the correlation entropy C of the signal in the Hilbert space σ (x,y);

[0046]

[0047] where σ=1;

[0048] B. When the signal under investigation has second-order cyclostationary characteristics, the correlation functi...

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Abstract

The invention belongs to the technical field of signal processing, relates to a radio signal carrier frequency estimation method based on a generalized cyclic correlation entropy and is used for solving the problem of estimating radio signal carrier frequency in radio signal monitoring. The method includes: utilizing a known signal to respectively calculate a correlation function of the signal in European space and correlation entropy of the signal in Hilbert space; when the known signal has second-order cyclic stable characteristics, acquiring a composite correlation entropy based on limited European space and Hilberty space; calculating the generalized cyclic correlation entropy of the known signal, establishing a three-dimensional stereogram, and acquiring carrier frequency of an original signal through frequency spectrum peak. By the method, robustness to pulse noise, Gaussian noise and noising mixing the two can be improved, and higher-accuracy radio signal carrier frequency estimation can be realized.

Description

technical field [0001] The invention belongs to the technical field of signal processing, and relates to the estimation problem of radio signal carrier frequency in radio signal monitoring, in particular to the estimation problem of radio signal carrier frequency in radio signal monitoring under the condition of common interference of impulse noise and Gaussian noise . Background technique [0002] In the field of signal processing, estimating the carrier frequency of radio signals under the condition of noise interference has always been a very important and complex problem. According to the different types of environmental noise, there are currently two very effective radio signal carrier frequency estimation methods: the classic cyclic correlation method [Gardner W A, Napolitano A, Paura L. Cyclostationarity: Half a century of research [J]. Signal Processing, 2006 ,86(4):639-697.] and the cyclic correlation entropy method proposed in 2016 [Luan S, Qiu T, Zhu Y, et al.Cyc...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/00
CPCH04L27/0014H04L2027/0024
Inventor 邱天爽刘涛李景春李蓉
Owner DALIAN UNIV OF TECH
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