Terminal guided multimode terminal cognitive radio technology

Abstract

The invention relates to a cognitive radio, spectrum sensing, spectrum detection, and wireless network technology, especially relates to a terminal-guided multimode terminal cognitive radio technology. The cognitive radio technology is an effective method aiming at spectrum resource shortage in a wireless application environment. The spectrum detection technology of the master user idle spectrum sensing is indispensable technology in a cognitive wireless network, the capacity for detecting the primary user spectrum by a cognitive user is limited by the multipath effect and the shadow effect, so that the lowness of a spectrum detection probability is caused. The invention provides a cooperative spectrum detection scheme by use of five cognitive user cooperative mechanisms, infers a mathematical formula of each of a global error false alarm probability and a global detection probability under two fusion rules: an OR rule and an AND rule, thereby obtaining a relation graph of the detection probability and the signal-to-noise ratio under two fusion rules. A simulation result shows that the proposed detection scheme can improve the efficiency on the master user spectrum detection by the cognitive user.

Description

technical field [0001] The present invention relates to a cognitive radio, spectrum sensing, spectrum detection, and wireless network technology, in particular to a terminal-guided multi-mode terminal cognitive radio technology. Background technique [0002] The contradiction between the increasing demand for spectrum and the limited spectrum resources is the main bottleneck restricting the development of wireless communication. However, according to the survey, the utilization rate of spectrum resources in the licensed frequency band is currently at a very low level. Wireless communication is facing Very big challenge [1]. Radio spectrum resources are generally authorized and allocated by the government. This management method of fixed allocation of spectrum often leads to uneven allocation of spectrum resources, and even wasteful situations. This contradicts the increasingly serious problem of spectrum shortage. As an intelligent spectrum sharing technology, cognitive rad...

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Problems solved by technology

[0002] The contradiction between the increasing demand for spectrum and the limited spectrum resources is the main bottleneck restricting the development of wireless communication. However, according to the survey, the utilization rate of spectrum resources in the licensed frequency band is currently at a very low level. Wireless communication is facing Very big challenge[1]

Radio spectrum resources are generally authorized and allocated by the government. This management method of fixed allocation of spectrum often leads to uneven allocation of spectrum resources and even wasteful situations. This is contradictory to the increasingly serious problem of spectrum shortage.

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