A Spectrum Sensing Method Based on Eigenvalues ​​of Circular Matrix

A cyclic matrix and spectrum sensing technology, which is applied in transmission monitoring, electrical components, transmission systems, etc., can solve problems such as poor detection performance and achieve the effect of excellent spectrum sensing performance

Inactive Publication Date: 2020-07-03
UNIV OF SCI & TECH BEIJING
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a spectrum sensing method based on the eigenvalues ​​of the circulant matrix to solve the problem of poor detection performance of the eigenvalue detection methods in the prior art under low sampling points and low signal-to-noise ratio

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  • A Spectrum Sensing Method Based on Eigenvalues ​​of Circular Matrix
  • A Spectrum Sensing Method Based on Eigenvalues ​​of Circular Matrix
  • A Spectrum Sensing Method Based on Eigenvalues ​​of Circular Matrix

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Embodiment Construction

[0041] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

[0042] Aiming at the problem that the existing eigenvalue detection method has poor detection performance under low sampling points and low signal-to-noise ratio, the invention provides a spectrum sensing method based on the eigenvalue of a circular matrix.

[0043] like figure 1 As shown, the spectrum sensing method based on the eigenvalues ​​of the circulant matrix provided by the embodiment of the present invention includes:

[0044] S101. Perceive the signal of the authorized user through cooperation of multiple unauthorized users;

[0045] S102, divide the perceived signal into multiple receiving vectors according to the sampling time, and determine the circulant matrix of each receiving vector;

[0046] S103, calculating the average covariance ma...

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Abstract

The invention provides a spectrum sensing method based on a cyclic matrix characteristic value. Unlicensed users are guaranteed to have relatively high spectrum sensing performance under the same sample point number. The method comprises the steps of sensing signals of licensed users through cooperation of a plurality of unlicensed users; dividing the sensed signals into a plurality of receiving vectors according to sample time and determining a cyclic matrix of each receiving vector; calculating a mean covariance matrix of the cyclic matrix of each receiving vector and solving a characteristic value of the mean covariance matrix; and establishing detection statistics for binary assumption detection according to the characteristic value, judging that the licensed users do not exist if thedetection statistics is greater than a set threshold, otherwise, judging that the licensed users exist. According to the method, whether the licensed users exist or not can be sensed in a cognitive radio network.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a spectrum sensing method based on eigenvalues ​​of a circular matrix. Background technique [0002] With the advent of the data age, wireless networks and information traffic have grown exponentially, which puts a huge demand on radio spectrum resources. However, the current fixed spectrum allocation strategy makes radio spectrum resources not effectively utilized. In order to solve the contradiction between the scarcity of spectrum resources and the low utilization rate of the existing spectrum, a cognitive radio system based on a dynamic spectrum access strategy is proposed. Access to idle spectrum, thereby effectively improving the utilization of spectrum resources. [0003] In order to prevent interference to authorized users, unlicensed users must be able to sense the existence of authorized users in a timely manner. Spectrum sensing technology provi...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B17/382H04W16/10H04W16/14
CPCH04B17/382H04W16/10H04W16/14
Inventor 杜利平董瑞
Owner UNIV OF SCI & TECH BEIJING
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