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A Simultaneous Same-Frequency Full-Duplex Nonlinear Interference Suppression Device and Method

A technology of same-frequency full-duplex and interference suppression, which is applied in duplex signal operation, shaping network in transmitter/receiver, digital transmission system, etc., can solve problems such as not considering the nonlinear influence of radio frequency reconstruction channel, and achieve Improved communication quality, beneficial effects for performance

Active Publication Date: 2018-10-02
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0010] In summary, the existing self-interference cancellation technical solutions do not consider how to achieve the best self-interference cancellation under the nonlinear influence of the radio frequency reconstruction channel

Method used

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  • A Simultaneous Same-Frequency Full-Duplex Nonlinear Interference Suppression Device and Method
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  • A Simultaneous Same-Frequency Full-Duplex Nonlinear Interference Suppression Device and Method

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Embodiment Construction

[0047] Further describe the technical scheme of the present invention in detail below in conjunction with accompanying drawing:

[0048] The present invention proposes a simultaneous same-frequency full-duplex nonlinear interference suppression method and a new architecture. Aiming at the nonlinear characteristics of the three channels of transmission, reception, and reconstruction, through the added feedback channel, real-time acquisition, quantification, and analysis of the nonlinearity of the three channels of transmission, reception, and reconstruction are realized, and the nonlinearity of the above three channels is analyzed inhibition. Such as figure 1 As shown, the device includes a transmitting unit baseband processing module, a transmitting channel, a plurality of couplers (not shown in the figure), a feedback channel, a reconstruction channel, a circulator, an antenna, a radio frequency domain self-interference extraction module, a nonlinear extraction path, a digit...

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Abstract

The invention discloses a device and method for suppressing nonlinear interference of simultaneous and same-frequency full-duplex nonlinear interference. In the case of analyzing the nonlinear self-interference characteristics of three channels of simultaneous and same-frequency full-duplex transmission, reception and reconstruction, the transmission, Receive and reconstruct the nonlinear characteristics of the three channels, through the added feedback channel, and through the establishment of mathematical models, nonlinear signal extraction of self-interference reconstruction channel, self-interference nonlinear signal modeling, nonlinear self-interference of self-interference reconstruction channel Suppression, accurate digital self-interference cancellation and other methods suppress the nonlinearity of the entire full-duplex system, and finally suppress the nonlinear self-interference in the received signal to the vicinity of the receiver noise floor. Aiming at the environment of high power, large bandwidth, multi-path self-interference signals, etc., the present invention jointly eliminates simultaneous co-frequency interference at the transmitting end and the receiving end, and achieves the best self-interference cancellation performance, which not only doubles the spectrum utilization rate, but also improves the system Excellent communication quality, improve the stability and reliability of communication equipment working in the same frequency environment at the same time.

Description

technical field [0001] The invention relates to a device and a method for simultaneous and same-frequency full-duplex nonlinear interference suppression. Background technique [0002] Current wireless communication systems use time division duplex or frequency division duplex methods for two-way communication. In the mobile communication system, the time division duplex system receives and transmits in different time slots of the same frequency channel, that is, the carrier, and uses guaranteed time to separate the receiving and transmitting channels, thereby isolating the interference between the receiving channel and the transmitting channel. The reception and transmission of the frequency division duplex system in the mobile communication system are separated on two symmetrical frequency channels, and the guaranteed frequency band is used to separate the reception and transmission channels, thereby isolating the interference between the reception channel and the transmiss...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/525H04L5/14H04L25/03
CPCH04B1/525H04L5/14H04L25/03006
Inventor 潘文生韩胜涛沈莹邵士海唐友喜
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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