Frequency spectrum sensing method, device and equipment of frequency spectrum sharing system

Abstract

The embodiment of the invention provides frequency spectrum sensing method, device and equipment of a frequency spectrum sharing system. The detection of the frequency spectrum sensing energy is carried out in a frequency domain; a whole frequency band is divided into a plurality of subbands; and a local sensing node measures the energy level of each subband and feeds back the energy level of each subband to a confluence center. Aiming at each subband, in all sensing nodes, the confluence center selects the energy level of the subband with a maximum energy level as the global energy level of the subband, and the energy levels of the subbands with the maximum value are averaged to obtain the global energy level of the whole frequency band. By using the cooperative sensing method, more local sensed information is sent to the confluence center, the maximum energy level of each subband can be selected among all cooperative sensing nodes, and the energy level of the deeply selectively faded subband does not contribute to the global energy level. By the mode, more user subsets can be obtained, the selective fade of the frequency is reduced, and the sensing performances are improved.

Description

technical field [0001] The present invention relates to communication technology, and in particular to a spectrum sensing method, device and equipment of a spectrum sharing system. Background technique [0002] In the spectrum sharing system under the licensed spectrum, the master system and the slave system share a certain spectrum resource. When the master system does not occupy this spectrum resource, the slave system can use this idle resource opportunistically. The main system has privileged use of the spectrum and can access it at any time. The slave system uses the spectrum opportunistically. When the master system uses the spectrum, the slave system needs to avoid it. In order to avoid harmful interference to the primary system, the secondary system must periodically detect the existence status of the primary system, that is, the secondary system should periodically sense whether spectrum resources are available. If the primary system does not occupy the spectrum r...

AI Technical Summary

Problems solved by technology

[0003] However, in the real spectrum sharing system environment, since the main signal is often weak, spectrum sensing is always affected by uncertain interference, channel attenuation, shadows, etc.

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