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Full-duplex self-interference cancellation in combined spatial domain and polarization domain

A self-interference elimination and self-interference technology, applied in the fields of transmission noise suppression, electrical components, transmission systems, etc., can solve the problems of the loss of antenna degrees of freedom, affecting the system data rate performance, etc., to eliminate self-interference and improve the system data rate performance. , reduce the effect of self-interference signal

Active Publication Date: 2018-12-21
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

However, the use of orthogonal dual-polarized antennas will cause a loss in the degree of freedom of the antennas, affecting the data rate performance of the system

Method used

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  • Full-duplex self-interference cancellation in combined spatial domain and polarization domain
  • Full-duplex self-interference cancellation in combined spatial domain and polarization domain
  • Full-duplex self-interference cancellation in combined spatial domain and polarization domain

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Embodiment Construction

[0047] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0048] The invention proposes a full-duplex self-interference elimination method combining space domain and polarization domain.

[0049] In the face of the contradiction between limited spectrum resources and a large number of spectrum resources in the field of wireless communication, the industry has proposed a full-duplex communication technology that can greatly improve spectrum utilization. It is defined as a communication node that transmits and receives signals at the same frequency at the same time. In the process of realizing full-duplex communication, the power of the self-interference signal is much greater than the expected signal, generally 60-100dB higher than the expected signal, which will cause the communication equipment to fail to receive the signal normally. Duplexing presents an important challenge to sufficiently increase data rates.

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Abstract

The invention discloses a full-duplex self-interference cancellation method in combined spatial domain and polarization domain, so that that invention belongs to the field of wireless commuication technology, includes using antenna isolation in space domain to cancel self-interference, converting multiplicative phase noise interference of self-interference signal into additive noise interference,using reconstructed self-interference signal to cancel self-interference through estimation compensation, and finally receiving and recovering desired signal through polarization matching. At the sametime, the invention considers the influence of the spatial characteristic and the polarization characteristic in the canceling method on the full-duplex self-interference, realizes the full-duplex self-interference canceling without being influenced by the phase noise, and can improve the self-interference canceling quantity performance and the system data rate performance.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a full-duplex self-interference elimination method combining a space domain and a polarization domain. Background technique [0002] In the face of the contradiction between limited spectrum resources and a large number of spectrum resources in the field of wireless communication, the industry has proposed a full-duplex communication technology that can greatly improve spectrum utilization. It is defined as a communication node that simultaneously transmits and receives signals at the same frequency. In the process of realizing full-duplex communication, the power of the self-interference signal is much greater than the expected signal, generally 60-100dB higher than the expected signal, which will cause the communication equipment to fail to receive the signal normally. Duplexing presents an important challenge to sufficiently increase data rates. [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/525H04B1/40H04B15/00
CPCH04B1/40H04B1/525H04B15/00
Inventor 刘芳芳冯春燕王昕怡
Owner BEIJING UNIV OF POSTS & TELECOMM
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