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A joint detection method and device for broadband multi-user scenarios

A joint detection and multi-user technology, applied in the field of cognitive wireless networks, can solve problems such as low accuracy rate and spectrum access

Active Publication Date: 2020-09-18
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

This results in unintended spectrum access with low accuracy

Method used

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  • A joint detection method and device for broadband multi-user scenarios
  • A joint detection method and device for broadband multi-user scenarios
  • A joint detection method and device for broadband multi-user scenarios

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Embodiment Construction

[0042] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0043] The joint detection method for a broadband multi-user scenario provided by an embodiment of the present invention will firstly be described in detail below.

[0044] see figure 1 , figure 1 It is a schematic flowchart of a joint detection method for a broadband multi-user scenario according to an embodiment of the present invention, which is applied to a secondary user and includes the following steps:

[0045] S101. Estimating channel parameters of t...

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Abstract

The embodiment of the invention provides a joint detection method and device for a broadband multi-user scene, and the method comprises the steps: carrying out the estimation of channel parameters ofa target sub-band, and obtaining the channel state information of the target sub-band; receiving a signal on a target sub-band to be accessed, and estimating the received signal by using the minimum Euclidean distance according to the channel state information to obtain an estimated signal; increasing the signal-to-noise ratio gain of the estimation signal in a time-frequency domain, and detectingthe signal after the signal-to-noise ratio gain in a space domain to obtain a detection statistic of an access target sub-band; receiving detection statistics sent by other secondary users of the target sub-band to be accessed, and fusing the detection statistics to obtain fused detection statistics; and comparing the fused detection statistics with a preset threshold value, and determining whether the target sub-band has a detection result of the main user or not. Visibly, by applying the method provided by the embodiment of the invention, the accuracy of accessing the secondary user can beimproved.

Description

technical field [0001] The present invention relates to the technical field of cognitive wireless networks, in particular to a joint detection method and device for broadband multi-user scenarios. Background technique [0002] Spectrum detection technology is the basis and premise of cognitive radio applications. Cognitive radio devices can accurately sense whether there is a free frequency band at a certain time and place for unauthorized users, that is, secondary users. At the same time, it should be monitored at any time whether there is a new authorized user, that is, the primary user needs to access the frequency band, so that the secondary user can quit using the spectrum resource in time to avoid interference to the primary user. [0003] Based on the above, it can be seen that without affecting the normal communication of the primary user, the wireless communication device with the spectrum sensing function can temporarily use the idle licensed channel for communicat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B17/309H04B17/336H04W24/08
CPCH04B17/309H04B17/336H04W24/08
Inventor 景晓军杨威黄海
Owner BEIJING UNIV OF POSTS & TELECOMM
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