Method, equipment and system for cooperative spectrum sensing

Abstract

The invention provides a method, equipment and a system for cooperative spectrum sensing. The method comprises the following steps that: in the (n+1)th cooperative spectrum sensing process, sensing equipment participating in cooperative spectrum sensing samples a master user signal to obtain sampling data; according to an estimated quantization bit, the sampling data is quantized to obtain sensing information; and the sensing equipment sends sensing information to fused center equipment according to a sensing priority order determined in the nth cooperative spectrum sensing process until the fused center equipment judges whether a main user exists according to the sensing information, wherein n is more than or equal to the positive integer of 1. The system comprises the sensing equipment and the fused center equipment. According to the scheme provided by the embodiment, data transmission and sensing time in the cooperative spectrum sensing process can be effectively reduced.

Description

technical field [0001] Embodiments of the present invention relate to the field of radio technologies, and in particular, to a method, device and system for cooperative spectrum sensing. Background technique [0002] Studies have shown that a large amount of spectrum has not been used in the fixedly allocated spectrum at present, which causes a great waste of spectrum resources. Cognitive Radio (referred to as: CR) can detect these unoccupied frequency bands by sensing the wireless spectrum environment, and dynamically access them without interfering with the primary user (referred to as: PU). These frequency bands improve spectrum utilization, which makes CR the most promising technology to solve the current shortage of spectrum resources. [0003] Spectrum sensing is a key technology of CR. The purpose of spectrum sensing is to monitor and detect the activity of the PU signal on a specific frequency band. When it detects the existence of idle spectrum, the CR system can ...

AI Technical Summary

Problems solved by technology

[0006] Embodiments of the present invention provide a method, device, and system for cooperative spectrum sensing, which are used to solve the problems of waste of data transmission bandwidth and long sensing time caused by the use of a unified quantizer by multiple nodes participating in cooperative spectrum sensing in the prior art , which effectively reduces the data transmission and sensing time in the collaborative spectrum sensing process

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