Spectrum sensing method and related equipment based on three-point shaping of phase difference distribution curve
A technology of phase difference distribution and spectrum sensing, which is applied in the field of communication, can solve problems such as the inability to obtain accurate prior information and the difficulty in effective use of spectrum sensing methods, and achieve fast and effective sensing, improved spectrum sensing capabilities, and strong robustness Effect
Active Publication Date: 2021-08-17
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology
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 impossible to obtain accurate prior information, and traditional spectrum sensing methods are difficult in such incomplete information scenarios. function effectively
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[0044] 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.
[0045] 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.
[0046] 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 three-point shaping of the phase difference distribution curve; the method includes: determining the optimal sampling frequency; The received signal is subjected to sampling processing; among them, several sampling points are obtained by sampling processing; the phase difference between two adjacent sampling points is calculated respectively to obtain the first phase difference probability distribution curve; the first phase difference probability distribution curve is obtained by using the three-point shaping method Shape recognition to obtain the decision statistics; determine the detection threshold; compare the decision statistics with the detection threshold, if the decision statistics are greater than the detection threshold, it is determined that the main user signal exists; otherwise, it is determined that the main user signal does not exist. The present application can effectively improve the spectrum sensing ability in a low signal-to-noise ratio environment, and in a communication environment with incomplete information, it can still perceive spectrum holes quickly and effectively, and has strong robustness.
Description
technical field [0001] One or more embodiments of this specification relate to the field of communication technologies, and in particular to a spectrum sensing method and related equipment based on three-point shaping of a phase difference distribution curve. 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 impossible to obtain accurate prior information, and traditional spectrum sensing methods are difficult in such incomplete information scenarios. function effectively. Contents of the invention [0003] In view of this, the purpose of one or more embodiments ...
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IPC IPC(8): H04B17/309H04B17/382
CPCH04B17/309H04B17/382
Inventor 许文俊王阳高晖张艺檬张治冯志勇
Owner BEIJING UNIV OF POSTS & TELECOMM