Adaptive Spectrum Sensing Method for IoV Cognitive Radio

Abstract

The invention relates to a method for adaptive spectrum sensing of a cognitive radio of the Internet of Vehicles, which includes establishing a cognitive vehicle networking composed of a spectrum sensing fusion center, cognitive vehicles and authorized users. The spectrum sensing fusion center is based on the energy detection results and information sent by each cognitive vehicle Noise ratio and preset signal-to-noise ratio screening value, select the primary cognitive group members participating in the collaboration, calculate the normalized quotient corresponding to the signal-to-noise ratio of each primary cognitive group member, and obtain the signal-to-noise ratio preset threshold, The optimal threshold value of signal-to-noise ratio and the joint screening parameter value of each primary cognitive vehicle are used to select the reselected cognitive vehicle participating in the collaboration; finally, the spectrum sensing fusion center performs adaptive sensing based on the spectrum sensing results of the reselected cognitive vehicle Fusion, to obtain the best energy decision threshold that adapts to the energy change of the received signal under the motion state of the cognitive vehicle, select the best cooperative final cognitive vehicle for cooperative sensing, and ensure the best cooperative final result under the minimum spectrum detection error Selecting the number of cognitive vehicles reduces the complexity of collaborative detection.

Description

technical field [0001] The invention relates to the field of the Internet of Vehicles, in particular to a method for adaptive spectrum sensing of a cognitive radio of the Internet of Vehicles. Background technique [0002] The Internet of Vehicles is based on the intra-vehicle network, the inter-vehicle network, and the in-vehicle mobile Internet. It is a system network for data communication and information exchange between vehicles or between vehicles and people in accordance with pre-agreed protocols and interaction standards. It is an integrated network that can realize vehicle intelligent monitoring and intelligent traffic management. It is a typical application of Internet of Things technology in the field of transportation systems and an important factor for the realization of the national "One Belt, One Road" major strategy. [0003] In existing vehicles, with the continuous installation of various wireless communication devices in vehicles, most vehicles equipped wi...

AI Technical Summary

Problems solved by technology

Therefore, the existing cooperative spectrum sensing method in the cognitive wireless network of the Internet of Vehicles cannot meet the actual sensing needs of cognitive vehicles, nor can it accurately realize spectrum sensing.

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