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Frequency spectrum identification method and device for wireless communication system

A wireless communication system and spectrum identification technology, applied in wireless communication, transmission system, transmission monitoring and other directions, can solve problems such as low accuracy rate and spectrum access

Active Publication Date: 2020-03-24
BEIJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This results in unintended spectrum access with low accuracy

Method used

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  • Frequency spectrum identification method and device for wireless communication system
  • Frequency spectrum identification method and device for wireless communication system
  • Frequency spectrum identification method and device for wireless communication system

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Embodiment Construction

[0058] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0059] The following first describes in detail the spectrum identification method of the wireless communication system provided by the embodiment of the present invention.

[0060] See figure 1 , figure 1 It is a schematic flow chart of a method for spectrum identification of a wireless communication system according to an embodiment of the present invention. Dividing a preset frequency band into multiple sub-frequency bands and applying ...

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Abstract

The embodiment of the invention provides a frequency spectrum identification method and device for a wireless communication system. The method comprises the following steps: receiving a signal on a target sub-band to be accessed; performing maximum likelihood estimation on the signals of the target sub-band received in the Gaussian noise environment under a first condition and a second condition by using a preset generalized likelihood ratio detector to obtain detection statistics of accessing the target sub-band by a secondary user; when the detection statistics obtained under the first condition is greater than a threshold value; and when the detection statistical magnitude obtained under the second condition is smaller than the threshold value, accessing to the target sub-band, and by applying the scheme provided by the embodiment, whether the primary user exists in the target sub-band can be sensed, so that the accuracy of accessing to the secondary user is improved under the condition that the use of the primary user is not influenced.

Description

Technical field [0001] The present invention relates to the technical field of cognitive wireless networks, in particular to a method and device for spectrum identification of a wireless communication system. Background technique [0002] Spectrum detection technology is the basis and prerequisite of cognitive radio applications. Cognitive radio equipment can accurately sense whether there is an idle frequency band at a certain time and place for unlicensed users to use. At the same time, it should be monitored at any time whether there are new authorized users, that is, the primary user needs to access the frequency band, so that secondary users quit using the spectrum resources in time to avoid causing interference to primary users. [0003] Based on the above, it can be known that under the premise of not affecting the normal communication of the primary user, a wireless communication device with a spectrum sensing function can temporarily borrow an idle authorized channel for c...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W16/10H04B17/382
CPCH04B17/382H04W16/10
Inventor 景晓军杨威黄海
Owner BEIJING UNIV OF POSTS & TELECOMM