Spectrum sensing method based on phase difference distribution curve three-point shaping and related equipment
A phase difference distribution and spectrum sensing technology, applied in the field of communications, can solve the problems of inability to obtain prior information accurately, and the difficulty of spectrum sensing methods to function effectively, achieve fast and effective sensing, improve spectrum sensing capabilities, and have strong robustness. Effect
Active Publication Date: 2020-12-11
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 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 the invention provide a spectrum sensing method based on phase difference distribution curve three-point shaping and related equipment. The method comprises the following steps: determining an optimal sampling frequency; sampling the received signal received by a receiving end at the optimal sampling frequency, wherein a plurality of sampling points are obtained throughsampling processing; calculating the phase difference of two adjacent sampling points to obtain a first phase difference probability distribution curve; performing shape identification on the first phase difference probability distribution curve by using a three-point shaping method to obtain judgment statistics; determining a detection threshold; comparing the judgment statistics with the detection threshold, and if the judgment statistics is greater than the detection threshold, judging that a main user signal exists; otherwise, judging that the main user signal does not exist. According tothe invention, the spectrum sensing capability in a low signal-to-noise ratio environment can be effectively improved, a spectrum hole can still be quickly and effectively sensed in a communication environment with incomplete information, and the robustness is relatively high.
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