Fast multi-signal channel combined detection method based on illation in cognition radio communication system

A cognitive wireless communication and joint detection technology, applied in the field of fast multi-channel joint detection, which can solve the problems of large detection delay and low efficiency.

Inactive Publication Date: 2009-04-08
ZHEJIANG UNIV
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Problems solved by technology

The traditional method of scanning and detecting all channels ...

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  • Fast multi-signal channel combined detection method based on illation in cognition radio communication system
  • Fast multi-signal channel combined detection method based on illation in cognition radio communication system
  • Fast multi-signal channel combined detection method based on illation in cognition radio communication system

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Embodiment Construction

[0048] Each secondary user in the cognitive wireless communication system only randomly selects some channels in all channels for joint detection in each sensing process, and sends the sensing results to the fusion center uniformly, and the fusion center conducts appropriate reasoning and synthesis on the sensing results , to judge the activity status of all channels, greatly improve the detection efficiency, reduce the perception delay, and thus improve the spectrum efficiency.

[0049] In the cognitive wireless communication system, each secondary user randomly selects some channels from all channels to be sensed according to the ideal solitary wave distribution in each sensing process, and assigns the channel labels of the part of the channels and the sensing values ​​of the part of the channels The results are sent to the fusion center, and then the fusion center makes a comprehensive analysis and judgment on the activity status of the primary users on all channels by using...

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Abstract

The invention discloses a fast multi-channel combined detecting cognizing method based on reasoning in a wireless communication system and is mainly characterized in that each secondary user in the wireless communication system randomly selects partial channels in the channels to be cognized according to an ideal arc wave distribution in each cognizing process for carrying out cognizing, and the channel marks of the partial channels and the cognizing result of the partial channels are sent to a fusing center; then the fusing center utilizes the reasoning algorithms like belief-propagation to carry out comprehensive analyzing and judging on the moving state of the main users on all the channels. The method can quickly, effectively and reliably detect the moving states of the main users on a plurality of channels and can reduce the sensing capacity demand of each secondary user for adapting different network scales, thus greatly improving the detecting efficiency, reducing the time delay of sensing, and effectively improving the operating factor of frequency spectrum.

Description

technical field [0001] The invention relates to the technical field of wireless digital communication, in particular to a reasoning-based fast multi-channel joint detection method in a cognitive wireless communication system, which can quickly, efficiently and reliably detect the active status of a primary user on multiple channels, and can Reduce the perception capability requirements of each secondary user and adapt to different network scales. Background technique [0002] As a new type of intelligent wireless transmission technology, cognitive radio (CR) can adaptively adjust transmission parameters by sensing the surrounding wireless transmission characteristics, effectively solving the problem of scarcity of spectrum resources. [0003] Rapid and accurate spectrum estimation is the basic prerequisite for effective use of spectrum resources. Currently, spectrum sensing methods mainly include transmitter detection, cooperative detection, and interference-based detection....

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Application Information

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IPC IPC(8): H04B1/707H04B1/69H04B1/7105
Inventor 张朝阳王培雅黄慧吴可镝杨丽萍李雪娇陈晓明张建敏谢雪松
Owner ZHEJIANG UNIV
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