Reliability-based weighted collaboration spectrum detection method

A technology of cooperative spectrum and detection method, applied in wireless communication, transmission monitoring, network planning and other directions, can solve the problem of not considering reliability, and achieve the effect of improving detection performance, overcoming influence, and saving system resources

Inactive Publication Date: 2013-05-22
NANTONG UNIVERSITY
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Problems solved by technology

However, traditional cooperative spectrum detection does not take into account the reliability of local spectrum detection results caused by factors such as channel and environment in the actual cognitive radio network.

Method used

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  • Reliability-based weighted collaboration spectrum detection method
  • Reliability-based weighted collaboration spectrum detection method
  • Reliability-based weighted collaboration spectrum detection method

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Embodiment Construction

[0032] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0033] Such as figure 1 Shown is a schematic diagram of a cognitive radio network. In the figure, the PU is the main user, the FC is the fusion center, and the SU 1 、SU 2 、SU 3 ,...,SU M All are perception nodes (cognitive users).

[0034] The weighted cooperative spectrum detection method based on credibility in the embodiment of the present invention (see the flow chart figure 2 ), including the following steps:

[0035] Step 1. Network configuration - configure M perception nodes SU in the network with existing primary user PU 1 、SU 2 、SU 3 ,..., SU M and a cognitive radio network FC with an information fusion center;

[0036]Step 2. Set the credibility of the sensing node—the credibility of the i-th sensing node at the m-th detection r i , m ...

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Abstract

The invention relates to a reliability-based weighted collaboration spectrum detection method. The main steps are that each sensor node detects a local spectrum and gains respective local spectrum sensing reliability of the local spectrum sensing by making a comparison with an overall detection result. A threshold of the reliability can be calculated through a tail-cut average method by a fusion center which chooses a sensor node with the reliability greater than the threshold is chosen to participate in cooperation. The reliability of the sensor node is greater than the threshold. The reliability of the sensor node which is screened out is dealt in a normalization mode in order to gain a weighting coefficient of the sensor node in the cooperation. After the fusion center detects statistics and carried out weighting summation process on the node which participates in the cooperation, a result is compared with a judgment threshold of a system and judge whether a master user is occupying a frequency spectrum is occupied by a master user is judged. The reliability of the sensor node is updated after each detection process in order to prepare the next detection process. The method has the advantages of reducing effectively the complexity of the cooperation detection of a cognitive network, improving the performance of the spectrum detection and being equipped with a good robustness in a noise-fluctuation environment.

Description

technical field [0001] The invention relates to wireless spectrum sensing and detection technology in the field of wireless communication, and more specifically relates to a weighted cooperative spectrum sensing and detection technology based on reliability in a wireless channel environment. Background technique [0002] With the rapid development of wireless communication technology, the contradiction between the increasing spectrum demand and the increasingly scarce spectrum resources is becoming more and more prominent. Studies have shown that the current utilization of spectrum resources is very uneven, and there are a large number of licensed frequency bands with low spectrum utilization. As a dynamic spectrum access technology, Cognitive Radio (CR) is recognized as one of the technical means to intelligently sense the spectrum environment and efficiently utilize the wireless spectrum, and has attracted widespread attention. The CR system requires cognitive users to pe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B17/00H04W16/14H04W24/08H04B17/382
Inventor 张士兵王海莲张晓格邱恭安
Owner NANTONG UNIVERSITY
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