Spectrum detection strategy, base station and terminal device for cognitive radio system

Abstract

The invention discloses a spectrum detection strategy for a cognitive radio (CR) system, which is realized in a way that: by utilizing the differences among radio propagation channels and the theories of subset partition and linear programming, selecting the optimal strategy of the detected channel set, realizing the optimal detection on the authorized user among every CR users, reporting the detection result to a CR base station, and determining whether an authorized user signal exists by utilizing the CR base station, thereby determining whether the spectrum is idle. The invention also provides a cognitive radio system, a base station and a terminal device. By implementing the spectrum detection strategy, the base station and the terminal device for the cognitive radio system, the invention enhances the spectrum detection performance of the CR system, realizes the detection on the CR system within all bands, and enhances the overall detection performance of the system. In addition, the invention can be used in a centralized network structure, and is applicable to Standard IEEE802.22.

Description

technical field The present invention relates to wireless communication technology, in particular to a spectrum detection strategy of a cognitive radio system, a base station and terminal equipment. Background technique With the development of wireless communication technology and services, wireless networks are facing a contradiction between limited spectrum resources and the demand for spectrum resources by a large number of services. To this end, the industry has proposed a cognitive radio (Cognitive Radio, CR) technology. CR technology is a new type of intelligent spectrum sharing technology that can actively detect and opportunistically utilize spectrum holes in licensed frequency bands (the spectrum holes are existing Idle spectrum allocated to licensed users but not used by them) to realize the reuse of non-renewable spectrum resources. The CR system is a communication system composed of a CR base station and multiple associated CR users, which can obtain spectrum h...

AI Technical Summary

Problems solved by technology

However, in the actual application scenarios of CR technology, since there is no interactive information between the CR system and authorized users (CR transparency principle), coupled with shadowing, multipath, and noise uncertainty on the wireless channel (wireless channel between authorized users and CR users), Affected by unfavorable factors such as CR, it is extremely complicated to require all CR users to uniformly perform accurate and fast detection of weak authorized signals in the entire frequency band, which is usually difficult to achieve under the conditions of existing hardware equipment.

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