Spectrum sensing method based on phase difference robust statistical characteristics and related equipment
A technology of statistical features and spectrum sensing, applied in the field of communications, can solve the problems of inability to obtain prior information accurately, mismatch of carrier frequencies at the transceiver end, and difficulty in functioning effectively, so as to achieve fast and effective sensing, and improve robustness and effectiveness. , the effect of robust spectrum sensing
Active Publication Date: 2021-01-15
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 accurately obtain prior information. Carrier frequency mismatch and other issues, the traditional spectrum sensing method is difficult to effectively play a role in the presence of uncertain noise power, carrier frequency mismatch and other factors or the prior information is completely unknown
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[0018] 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.
[0019] 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.
[0020] At present, spectrum sen...
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One or more embodiments of the invention provide a spectrum sensing method based on phase difference robust statistical characteristics and related equipment. The method comprises the following steps:sampling a received receiving signal to obtain a plurality of sampling points; separately calculating the phase difference of every two adjacent sampling points to obtain phase difference probabilitydistribution corresponding to the receiving signal; performing feature extraction on the first phase difference probability distribution to obtain a phase difference robust statistical feature corresponding to the receiving signal; and inputting the phase difference robust statistical characteristics into a pre-trained spectrum sensing model, and determining whether a main user signal exists or not according to the output of the spectrum sensing model. According to the method, the category of the phase difference probability distribution of the receiving signal is identified by extracting therobust statistical characteristics of the phase difference and training the machine learning model and learning the characteristics by utilizing supervised learning, and more accurate and more robustspectrum sensing is realized under the condition of a low signal-to-noise ratio fading channel.
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 phase difference robust statistical features. 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 accurately obtain prior information. For problems such as carrier frequency mismatch, traditional spectrum sensing methods are difficult to play an effective role in the presence of uncertain noise power, carrier frequency mismatch and other factors, or the prior...
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IPC IPC(8): H04B17/382
CPCH04B17/382
Inventor 许文俊王阳徐文波王俊义黄赛高晖
Owner BEIJING UNIV OF POSTS & TELECOMM