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Method and device for counteracting digital signals with same frequency and at the same time

A digital signal, same-frequency simultaneous technology, applied in digital transmission systems, shaping networks in transmitters/receivers, baseband system components, etc., can solve problems that affect the reception of received signals

Inactive Publication Date: 2017-12-05
ZTE CORP
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  • Summary
  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

Since the full-duplex system transmits and receives at the same frequency, the transmitted signal will seriously affect the reception of the received signal

Method used

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  • Method and device for counteracting digital signals with same frequency and at the same time
  • Method and device for counteracting digital signals with same frequency and at the same time
  • Method and device for counteracting digital signals with same frequency and at the same time

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Embodiment Construction

[0043] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the preferred embodiments described below are only used to illustrate and explain the present invention, but not to limit the present invention.

[0044] figure 2 is the flow chart of the simultaneous digital signal cancellation method at the same frequency provided by the embodiment of the present invention, such as figure 2 shown, the steps include:

[0045] Step S101: Convert the signal acquired from the transmit chain into a transmit digital signal, and acquire the receive digital signal from the receive chain.

[0046] Among them, the transmitting signal is obtained from the circulator of the power amplifier of the transmitting chain, and the transmitted signal is coupled back, and is filtered by the radio frequency sound table, local oscillator mixing, anti-aliasing filtering, VGA gain adjustment, low-pas...

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Abstract

The invention discloses a method and device for counteracting digital signals with same frequency and at the same time. The method for counteracting digital signals with the same frequency and at the same time comprises the following steps: converting the signal obtained from the transmission link into a transmission digital signal; obtaining a received digital signal from the receiving link; and using the transmission digital signal to counteract the interference signals transmitted at the same frequency mixed in the received digital signal. According to the invention, the problem that the transmission signal seriously affects signal receiving caused by the same frequency of the transmitting and the receiving in the full duplex system is solved through counteracting the transmission interference signals with the same frequency.

Description

technical field [0001] The present invention relates to the technical field of digital signal cancellation, in particular to a method and device for cancelling digital signals at the same frequency and simultaneously. Background technique [0002] The external contradiction between the surge in demand of wireless communication services and the shortage of spectrum resources is driving the internal change of wireless communication standards. Improve the spectral efficiency of Frequency Division Duplex (FDD) and Time Division Duplexing (TDD), and eliminate the differences in the way they use spectrum resources, becoming the fifth generation mobile communication system (5th generation mobile networks) , 5G) a goal of communication innovation. Co-frequency simultaneous full duplex based on self-interference suppression theory and technology has become a solution to achieve this goal, which can double the spectral efficiency from the theoretical limit. [0003] Full-duplex is a...

Claims

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Application Information

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IPC IPC(8): H04L25/03
CPCH04L25/03006H04L25/03254H04B1/10
Inventor 宋莲香
Owner ZTE CORP
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