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Method and device for simultaneous same-frequency full-duplex nonlinear interference suppression

A same-frequency full-duplex, interference suppression technology, applied in duplex signal operation, shaping network in transmitter/receiver, baseband system, etc., can solve the problem of not considering the nonlinear influence of radio frequency reconstruction channel, etc., and achieve improvement Communication quality, beneficial effect on performance

Active Publication Date: 2016-09-28
UNIV OF ELECTRONIC 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

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  • Method and device for simultaneous same-frequency full-duplex nonlinear interference suppression
  • Method and device for simultaneous same-frequency full-duplex nonlinear interference suppression
  • Method and device for simultaneous same-frequency full-duplex nonlinear interference suppression

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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 a method for simultaneous same-frequency full-duplex nonlinear interference suppression. Under the condition of analyzing nonlinear self-interference characteristics of simultaneous same-frequency full-duplex transmitting, receiving and reconstructing channels, suppression is carried out on the nonlinearity of the whole full-duplex system through an additionally arranged feedback channel and through the modes such as mathematical model establishing, nonlinear signal extraction of a self-interference reconstructing channel, self-interference nonlinear signal modeling, nonlinear self-interference suppression of the self-interference reconstructing channel and precise digital self-interference cancellation in allusion to the nonlinear characteristics of the transmitting channel, the receiving channel and the reconstructing channel, and finally nonlinear self-interference in received signals is suppressed to a part nearby bottom noises of a receiver. According to the invention, simultaneous same-frequency interference is eliminated by combining a transmitting terminal and a receiving terminal in allusion to the environments such as high-power, high bandwidth and multipath self-interference signals and the like, and the self-interference cancellation performance is enabled to be the best, thereby not only enabling the spectrum utilization efficiency to be doubled, improving the communication quality of the system, and improving the work stability and the reliability of communication equipment in a simultaneous same-frequency environment.

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...

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Application Information

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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 ELECTRONIC SCI & TECH OF CHINA
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