A Multi-user Cooperative Spectrum Sensing Method Based on Dual Threshold

A cooperative spectrum and dual-threshold technology, applied in the field of multi-user cooperative spectrum sensing based on dual-threshold, can solve problems such as the inability to detect the random arrival of primary user signals with high performance, and achieve the goal of saving data volume, improving performance, and ensuring accuracy. Effect

Active Publication Date: 2021-02-02
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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  • A Multi-user Cooperative Spectrum Sensing Method Based on Dual Threshold
  • A Multi-user Cooperative Spectrum Sensing Method Based on Dual Threshold
  • A Multi-user Cooperative Spectrum Sensing Method Based on Dual 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 present invention relates to the field of communication technology, in particular to a double-threshold-based multi-user cooperative spectrum sensing method. The method for multi-user cooperative spectrum sensing based on double thresholds includes the steps of: the secondary user constructs a statistical judgment according to the received data samples and the parameters of the random arrival process of the primary user signal; Construct corresponding double thresholds; judge statistical judgment amount and low threshold size, and send different judgment results to the fusion center. The fusion center fuses the first judgment result, the second judgment result and the third judgment result by OR principle to obtain a final judgment result. The double-threshold method can not only solve the problem of random arrival and identification of primary user signals, but also saves data volume compared with soft-decision cooperation, and the result is more accurate than hard-decision cooperation, which greatly improves performance while ensuring 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 Patents(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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