Multiuser cooperative spectrum sensing method based on double-threshold

A cooperative spectrum and dual-threshold technology, applied in the field of multi-user cooperative spectrum sensing based on dual-threshold, can solve the problem of inability to detect the random arrival of primary user signals with high performance, save data volume, high accuracy, and ensure accuracy Effect

Active Publication Date: 2017-07-07
PUTIAN UNIV
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Problems solved by technology

[0007] Therefore, it is necessary to provide a multi-user cooperative spectrum sensing method based on dual thresholds to solve the problem that the random arrival of primary user signals cannot be detected accurately and with high performance.

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  • Multiuser cooperative spectrum sensing method based on double-threshold
  • Multiuser cooperative spectrum sensing method based on double-threshold
  • Multiuser cooperative spectrum sensing method based on double-threshold

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[0029] In order to explain in detail the technical content, structural features, achieved goals and effects of the technical solution, the following will be described in detail in conjunction with specific embodiments and accompanying drawings.

[0030] see figure 1 , in this embodiment, it is assumed that the process of the random arrival of the primary user signal is a Poisson random process with known parameters. A specific implementation of a dual-threshold-based multi-user cooperative spectrum sensing method is as follows:

[0031]Step S101: The secondary user constructs a statistical decision quantity according to the received data samples and the parameters of the random arrival process of the primary user signal. The details are as follows: since the primary user signal is generally an authorized signal that exists in the actual communication system, such as DVB-T, LTE, etc., its occurrence often has certain rules, and the present invention assumes that the arrival o...

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Abstract

The invention relates to the technical field of communications, and in particular relates to a multiuser cooperative spectrum sensing method based on double-threshold. The multiuser cooperative spectrum sensing method based on the double-threshold comprises the following steps: a secondary user constructs a statistics judgement quantity according to a received data sample and a parameter of a primary user signal random arrival process; the secondary user constructing corresponding double thresholds according to different false alarm probabilities; the sizes of the statistics judgement quantity and the low threshold are judged, and different judgement results are sent to a fusion center; the fusion center fuses a first judgement result, a second judgement result and a third judgement result through an OR principle so as to obtain a final judgement result. By use of the double-threshold method disclosed by the invention, not only can be the problem of the primary user signal random arrival recognition solved, but also is data quantity saved in comparison with the soft judgement cooperation; the result is high in accuracy in comparison with the hard judgement cooperation, and the performance is greatly improved in the premise of guaranteeing the accuracy.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a double-threshold-based multi-user cooperative spectrum sensing method. Background technique [0002] Radio spectrum resource is a kind of precious non-renewable natural resource, but the current radio spectrum management method is a static and inflexible management method. Such a management method often leads to some frequency bands being overcrowded at certain times, while other frequency bands are idle and unused. As a result, radio spectrum resources are not fully utilized, resulting in great waste . [0003] Cognitive Radio (CR), as a dynamic spectrum management solution, its core idea is that secondary users (SUs) sense the surrounding radio environment through real-time spectrum detection, and when idle When the frequency band is not occupied by primary users (Primary Users, PUs), access to the idle frequency band and make use of it. If the frequency band...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B17/382H04W16/14
CPCH04W16/14H04B17/382
Inventor 陈世恩王俊黄继伟游臻华李喆许阳宋振一
Owner PUTIAN UNIV
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