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Spectrum sensing method

A spectrum sensing and frequency band technology, applied in the field of spectrum sensing to reduce bandwidth and improve detection performance

Inactive Publication Date: 2014-04-09
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to solve the problems existing in the existing serial combination method and parallel combination method in spectrum sensing, and propose a spectrum sensing method

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Embodiment Construction

[0016] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0017] The flow chart of the spectrum sensing method of the present invention is as follows figure 1 As shown, specifically: N cognitive users use the two-threshold decision rule to detect authorized users, assuming that the energy received by M cognitive users falls outside the two thresholds, there are M 2 = The energy received by N-M cognitive users falls between the two thresholds;

[0018] The M cognitive users who fall outside the two thresholds upload the detection results to the judgment center, and the judgment center performs hard judgment detection according to the uploaded information. exists, the M that falls between the two thresholds 2 A cognitive user uploads the information of the authorized user they received to the judgment center, and the judgment center determines whether the authorized user exists; if it detects that the...

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Abstract

The invention belongs to the cognitive radio technical field, and discloses a spectrum sensing method. The spectrum sensing method disclosed by the invention comprises the following steps: an authorized user is detected through two threshold decision rules firstly; a judging centre performs detection according to a detection result which is uploaded by a cognitive user outside the two thresholds; if detecting that the authorized user does not exist, the judging centre uploads information of the authorized user received by the cognitive user between the two thresholds; and the judging centre judges whether the authorized user exists according to the received information. According to the method disclosed by the invention, a serial combined method and a parallel combined method are comprehensive, and the detection performance is improved while the bandwidth required for the data transmission is reduced.

Description

technical field [0001] The invention belongs to the field of cognitive radio technology, and particularly relates to a spectrum sensing method therein. Background technique [0002] With the development of new radio services, spectrum resources are becoming more and more scarce, and the available frequency bands have basically been allocated to specific authorized users, but the utilization rate of the allocated spectrum is not very high. In order to solve the problem of low spectrum utilization, a mechanism called Cognitive Radio (CR, Cognitive Radio) has emerged. Cognitive radio opportunistically accesses licensed user frequency bands to use licensed user frequency bands that are not used by licensed users to improve spectrum utilization. From the perspective of a single node, cognitive technologies are mainly divided into matched filtering, energy detection, and loop feature detection. However, the detection performance of single-node detection is affected by unfavorabl...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W16/14H04B17/00H04B17/309
Inventor 熊文汇董彩萍王振伟李少谦
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA