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Co-time co-frequency full duplex communication method and device based on intermediate-frequency domain self-interference suppression

A technology of same-frequency full-duplex and communication method, which is applied in the direction of duplex signal operation, digital transmission system, electrical components, etc., can solve the problems of low integration and high power consumption, and achieve the effect of high integration

Inactive Publication Date: 2016-11-16
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

However, the simultaneous same-frequency full-duplex communication method based on the existing self-interference suppression technology has the problems of low integration and high power consumption, especially in cost, volume and power supply constrained application scenarios, the above problems are particularly serious

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  • Co-time co-frequency full duplex communication method and device based on intermediate-frequency domain self-interference suppression
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  • Co-time co-frequency full duplex communication method and device based on intermediate-frequency domain self-interference suppression

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Embodiment Construction

[0017] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, and the present invention includes but not limited to the following embodiments.

[0018] The invention reconstructs the anti-phase signal Leakc of the self-interference signal Leak in the digital baseband domain and the intermediate frequency domain, and suppresses the Leak in the intermediate frequency domain; the radio frequency domain transmits and the radio frequency domain receives the same antenna and the No. 1 N-phase passive mixing module (N is a natural number), simultaneously realizing the functions of receiving and down-converting the signal and up-converting and transmitting the transmitting signal Tx, so as to complete simultaneous and same-frequency full-duplex communication.

[0019] The present invention proposes a simultaneous same-frequency full-duplex communication method based on mid-frequency domain self-interference suppression to si...

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Abstract

The present invention provides a co-time co-frequency full duplex communication method and device based on intermediate-frequency domain self-interference suppression. According to the method,transmitting and receiving operations are performed simultaneously, wherein the transmitting operation includes: amplifying an intermediate-frequency signal and then mixing same with a local oscillation signal, to obtain an up-converted signal, and transmitting same through an antenna; and the receiving operation includes: receiving an aerial signal through the antenna, and mixing same with the local oscillation signal, to obtain a down-converted signal; mixing an inversion signal of the intermediate-frequency signal with the local oscillation signal, and performing impedance matching with the antenna, to generate an inversion signal of a self-interference signal; and performing weighted summation on the self-interference signal formed by the up-converted signal and the down-converted signal and the inversion signal thereof and amplifying same, and suppressing the self-interference signal, to obtain an amplified aerial signal. The method and device of the present invention can improve the system integration level, reduce power consumption, and implement co-time co-frequency full duplex communication, thereby meeting requirements of improving spectrum effectiveness in the technical field of communications.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, in particular to a full-duplex communication method and device. Background technique [0002] With the development of wireless communication technology and services, the problem of scarcity of spectrum resources has become increasingly acute, especially with the rise of 5G networks, higher requirements are placed on frequency resources. Therefore, how to improve spectrum utilization and transmit information at a high speed within a limited frequency band has become an urgent problem to be solved. In recent years, simultaneous and same-frequency full-duplex communication has been proven to be feasible. Compared with traditional time-division duplex and frequency-division duplex, simultaneous and same-frequency full-duplex communication can theoretically double the spectrum efficiency and channel capacity, and can obtain more High data transmission rate and throughput have thus gain...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/40H04L5/14
CPCH04B1/40H04L5/1423
Inventor 杜永乾李桂芳胡炜刘师斌
Owner NORTHWESTERN POLYTECHNICAL UNIV
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