A full-duplex authorized user signal extraction method based on polarization distance

Abstract

The invention discloses a full-duplex authorized user signal extraction method based on polarization distance, the cognitive user samples the authorization signal of the full-duplex authorization user, each authorization signal and its sampling time are recorded, the polarization distance between the authorized sampling signals corresponding to any two sampling times is selected and calculated, and then put it into three different sets according to the rules. Finally, two sets with fewer elements are selected to be regarded as from a single authorized user, so that the sampling signal from a single authorized user is obtained. The method uses polarization distance as a metric to calculate the difference of the sampling signals of the authorized users, and can accurately extract the singleauthorized user signals from the mixed sampling signals, and can design the polarization state transmitted by the cognitive users into a vector within the null space of the sampling signals of the twoauthorized users based on the signals mentioned above.

Description

technical field [0001] The invention belongs to the technical field of communication, and in particular relates to a full-duplex authorized user signal detection and analysis method designed based on the polarization distance of sampling signals. Background technique [0002] In cognitive radio networks, the existing authorized signal detection and analysis methods are mainly designed for authorized users of time division duplex and frequency division duplex. These detection and analysis methods can obtain the Features in the time domain, frequency domain, and space domain. Based on the above features, cognitive users can communicate in the orthogonal space of authorized user signals, thereby avoiding interference to authorized users and achieving the purpose of frequency reuse. However, the existing methods are only applicable to the cognitive communication system in which the authorized users adopt time division duplexing or frequency division duplexing technology. [00...

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the problems of high complexity and high signal extraction error rate in the authorization signal extraction method based on polarization similarity in the prior art solution, the present invention proposes an authorization signal analysis and extraction method based on polarization distance, which uses Polarization distance is used as a measure to calculate the difference between authorized user sampling signals, and accurately extract single authorized user signals in mixed sampling signals

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