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Credibility based cooperative spectrum sensing method

A technology for collaborative spectrum sensing and spectrum sensing, applied in wireless communication, transmission monitoring, network planning, etc.

Active Publication Date: 2010-08-25
PLA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to propose a collaborative spectrum sensing method based on credibility for the problem that it is difficult to compromise between spectrum sensing performance and sensing overhead under the condition of limited reporting channel bandwidth.

Method used

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  • Credibility based cooperative spectrum sensing method
  • Credibility based cooperative spectrum sensing method
  • Credibility based cooperative spectrum sensing method

Examples

Experimental program
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Embodiment 1

[0068] In this embodiment, as figure 1 As shown, there is one authorized user, N unauthorized users and one base station in the cooperative spectrum sensing system. Around the authorized user, the unauthorized users are randomly distributed in a certain area around the base station, and the distance between the unauthorized users is much less than Distance between unauthorized users and authorized users.

[0069] The process of this embodiment is as follows figure 2 As shown, the credibility-based collaborative spectrum sensing method includes the following steps:

[0070] (a). Unauthorized users use the energy sensing method for local sensing, that is, the energy value is accumulated after a period of time θ = Σ i = 1 2 u | y ( i ) | ...

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Abstract

The invention provides a credibility based cooperative spectrum sensing method, comprising the steps of initialization, local sensing of the unauthorized user, local decision, sensing information quantization, credibility fusion, decision fusion and the like. The invention gives the credibility of local sensing of the unauthorized user under the condition of unknown prior information, reduces thenetwork overhead of cooperative sensing by adopting the mixed threshold decision strategy uniting the base station and the unauthorized user and quantizing the local sensing result and has good sensing property.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and relates to a spectrum sensing implementation method in the field of digital communication, in particular to a sensing method that can be adopted in the case of limited reporting channel bandwidth in a cognitive radio network (CRN). It is a credibility-based cooperative spectrum sensing method used by unauthorized users in cognitive wireless networks. Background technique [0002] Radiocommunication spectrum is an important national resource, generally controlled by national agencies and allocated to authorized users. In such conventional radio communication systems, however, the allocation of spectrum is fixed. An authorized user has exclusive use of its spectrum, and other users are not allowed to use it. This allocation method is beneficial to ensure the quality of service (QoS) of the system. Since spectrum resources are used differently in different locations and time per...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W16/14H04W24/00H04B17/00H04B17/382
Inventor 王金龙吴启晖郑学强沈良王呈贵徐以涛
Owner PLA UNIV OF SCI & TECH
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