Spectrum sensing method and related equipment based on analytical expression of phase difference distribution curve
A technology of phase difference distribution and spectrum sensing, which is applied in transmission monitoring, electrical components, transmission systems, etc., can solve problems such as incomplete information, failure to realize the sending end, and inability to accurately obtain prior information, etc., to achieve strong robustness, The effect of fast and effective perception and more robust spectrum perception
Active Publication Date: 2021-08-17
BEIJING UNIV OF POSTS & TELECOMM
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However, in a communication environment with a low signal-to-noise ratio, it is challenging to perceive spectral holes quickly and accurately; in addition, in an actual communication environment, it is difficult to avoid problems such as the inability to accurately obtain prior information and the inability to achieve precise synchronization between the sending end and the receiving end. Traditional spectrum sensing schemes such as energy detection, cyclostationary feature detection, etc., are difficult to play an effective role in such incomplete and imperfect information scenarios
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[0043] In order to make the purpose, technical solutions and advantages of the present disclosure clearer, the present disclosure will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.
[0044] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in one or more embodiments of the present specification shall have ordinary meanings understood by those skilled in the art to which the present disclosure belongs. "First", "second" and similar words used in one or more embodiments of the present specification do not indicate any order, quantity or importance, but are only used to distinguish different components. "Comprising" or "comprising" and similar words mean that the elements or items appearing before the word include the elements or items listed after the word and their equivalents, without excluding other elements or items.
[0045] At present, spectrum sen...
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One or more embodiments of this specification provide a spectrum sensing method and related equipment based on the analytical expression of the phase difference distribution curve. The method includes: performing sampling processing on the received signal received by the receiving end; the sampling processing obtains several samples point; calculate the phase difference between two adjacent sampling points, and obtain the first phase difference probability distribution; perform feature extraction on the first phase difference probability distribution, and obtain the decision statistic; determine the detection threshold according to the decision statistic; The amount is compared with the detection threshold. If the decision statistic is greater than the detection threshold, it is determined that the primary user signal exists; otherwise, it is determined that the primary user signal does not exist. This application introduces a spectrum sensing mechanism based on the analytical expression of the phase difference distribution curve in the spectrum sensing of the wireless communication system, which effectively improves the effectiveness and reliability of spectrum sensing; in addition, it also proposes a sampling frequency multiplication estimation scheme, which can quickly estimate unknown frequencies information to realize blind spectrum sensing.
Description
technical field [0001] One or more embodiments of this specification relate to the technical field of communication technology, and in particular to a spectrum sensing method based on an analytical expression of a phase difference distribution curve and related equipment. Background technique [0002] Spectrum sensing technology can detect current spectrum information, find idle spectrum resources for reuse, improve spectrum utilization, and alleviate the contradiction between spectrum supply and demand caused by spectrum shortage. However, in a communication environment with a low signal-to-noise ratio, it is challenging to perceive spectral holes quickly and accurately; in addition, in an actual communication environment, it is difficult to avoid problems such as the inability to accurately obtain prior information and the inability to achieve precise synchronization between the sending end and the receiving end. Traditional spectrum sensing schemes such as energy detectio...
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IPC IPC(8): H04B17/309H04B17/382
CPCH04B17/309H04B17/382
Inventor 许文俊王阳冯志勇张艺檬高晖张治
Owner BEIJING UNIV OF POSTS & TELECOMM