Multiuser cooperative spectrum sensing method based on double-threshold

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...

AI Technical Summary

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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