A method and device for wideband spectrum sensing based on autoencoder
A self-encoder and broadband spectrum technology, which is applied in transmission monitoring, electrical components, transmission systems, etc., can solve the problem of low accuracy of spectrum hole detection
Active Publication Date: 2020-10-27
36TH RES INST OF CETC
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[0003] The present invention provides a wideband spectrum sensing method and device based on an autoencoder to solve the problem that the detection accuracy of spectrum holes in the prior art is not high, and the prior information of noise and signal needs to be known, which cannot meet the actual needs
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[0066] The design concept of the present invention is to disclose a wideband spectrum sensing method using an autoencoder, use the autoencoder to learn the characteristics of the signal power spectrum, find the abrupt point on the power spectrum according to the change of the feature, and further determine the spectrum according to the abrupt point hole. The solution of the embodiment of the present invention does not need to know the prior information of the noise and the signal, and can accurately perceive the spectrum holes for dynamic spectrum access.
[0067] figure 1 is a flowchart of an autoencoder-based broadband spectrum sensing method in an embodiment of the present invention, see figure 1 , the self-encoder-based broadband spectrum sensing method of this embodiment includes the following steps:
[0068] Step S101, estimating the power spectrum of the received signal,
[0069] Step S102, dividing the power spectrum to obtain each frequency band, forming an input v...
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The invention discloses a broadband spectrum sensing method and device based on a self-encoder. The method comprises the following steps of estimating a power spectrum of a received signal; segmentingthe power spectrum to obtain each frequency band, and making each frequency band form an input vector and inputting the input vector into the self-encoder, and training the self-encoder to obtain feature vectors output by the self-encoder; computing a similarity coefficient between the adjacent feature vectors; and computing a local maximum value point of the similarity coefficient, and carryingout spectrum hole judgment of the signal according to a computed result. According to the scheme in the embodiments of the invention, the characteristic of the signal power spectrum is learned throughthe self-encoder, a mutation point on the power spectrum is found according to the change of the characteristic, a spectrum hole is determined according to the mutation point, the prior information of the noise and the signal does not need to be known, and the spectrum hole can be accurately obtained.
Description
technical field [0001] The present invention relates to the technical field of radio communication, in particular to an autoencoder-based broadband spectrum sensing method and device. Background technique [0002] In a dynamic spectrum access network, unlicensed users (also called secondary users) can use spectrum holes currently unused by licensed users (also called primary users) to communicate, thereby improving the utilization of wireless spectrum resources. A key technology of dynamic spectrum access is the need to analyze the wideband spectrum to find spectrum hole information that can be used by unlicensed users, that is, wideband spectrum sensing. In the prior art, the accuracy of spectral hole detection is not high, and prior information of noise and signal needs to be known, which cannot meet actual needs. Contents of the invention [0003] The present invention provides a wideband spectrum sensing method and device based on an autoencoder to solve the problem t...
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IPC IPC(8): H04B17/382
CPCH04B17/382
Inventor 郑仕链陈仕川杨小牛
Owner 36TH RES INST OF CETC