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Method and system for eliminating harmonic interference in digital domain in 5G terminal based on nsa architecture

A harmonic interference and digital domain technology, applied in the field of harmonic interference elimination, can solve problems such as self-interference, achieve the effect of eliminating harmonic interference, stable performance, and easy hardware implementation

Active Publication Date: 2020-08-25
UNIV OF SCI & TECH BEIJING
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Problems solved by technology

[0013] The technical problem to be solved by the present invention is to provide a method and system for eliminating harmonic interference in the digital domain of 5G terminals based on the NSA architecture, so as to solve the problem of LTE uplink harmonic signals and Self-interference problem caused by NR downlink receiving signals at the same frequency

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  • Method and system for eliminating harmonic interference in digital domain in 5G terminal based on nsa architecture
  • Method and system for eliminating harmonic interference in digital domain in 5G terminal based on nsa architecture
  • Method and system for eliminating harmonic interference in digital domain in 5G terminal based on nsa architecture

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no. 1 example

[0049] First of all, in order to enable those skilled in the art to better understand the technical solution of the present invention, the abbreviations and definitions of key terms appearing in the present invention are described below, specifically as shown in Table 1:

[0050] Table 1 Definitions of abbreviations and key terms

[0051]

[0052] Aiming at the self-interference problem caused by LTE uplink harmonic signal and NR downlink received signal having the same frequency in 5G terminals under NSA architecture due to dual connection of LTE and NR, this embodiment provides a harmonic interference in 5G terminal based on NSA architecture The digital domain elimination method, its core idea is:

[0053] (1) The harmonic interference elimination scheme of the present invention is to eliminate in the digital domain;

[0054] (2) The harmonic interference elimination scheme of the present invention has two stages, wherein the first stage eliminates in the baseband time d...

no. 2 example

[0105] Correspondingly, in view of the above problems, this embodiment provides a digital domain cancellation system for harmonic interference in 5G terminals based on NSA architecture, the system includes a baseband time domain harmonic interference cancellation module and a baseband frequency domain harmonic interference cancellation module; in,

[0106] The baseband time-domain harmonic interference elimination module is used to digitize the RF signal of the signal at the PA output end in the LTE transmit link, and then use the digitized signal to reconstruct the first-order harmonic interference signal, and then reconstruct the signal in the NR receive link Subtract the first-order harmonic interference signal; according to the principle of minimum signal energy, adaptively adjust the amplitude, phase and delay adjustment of the first-order harmonic interference signal reconstruction process to adapt to the time-varying harmonic interference channel;

[0107] The baseband ...

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Abstract

The invention provides a method and a system for eliminating a harmonic interference digital domain in a 5G terminal based on NSA architecture, and aims to solve the problem of self-interference caused by the same frequency of an LTE uplink harmonic signal and an NR downlink received signal in the 5G terminal under the NSA architecture when LTE and NR are in dual connection. The method for eliminating the harmonic interference digital domain in the 5G terminal based on the NSA architecture comprises two stages of digital domain interference elimination, wherein the first stage uses an extra feedback channel of the transmitting end to feed back a radio frequency signal of a transmitting link to the receiving end for self-interference elimination, and the second stage models a harmonic signal according to the broadband multi-carrier frequency domain harmonic model provided by the invention and performs interference elimination in the frequency domain. Harmonic self-interference generatedby high-power and large-bandwidth signals can be well eliminated so that the 5G terminal is enabled to work more stably when using the interference spectrum, and the spectrum utilization rate can beenhanced.

Description

technical field [0001] The present invention relates to the technical field of harmonic interference elimination, in particular to a method and system for eliminating harmonic interference in a digital domain of a 5G terminal based on an NSA architecture. Background technique [0002] At present, 5G has developed to the deployment stage. As early as November 2017, my country released the frequency division of the 5G system in the mid-frequency band (3GHz-5GHz), and determined the 3300MHz-3600MHz and 4800MHz-5000MHz frequency bands as the 5G system in the mid-frequency band. working frequency band. [0003] Regarding 5G network deployment, there are currently two solutions in the industry, namely SA (Standalone, independent) architecture and NSA (Non-standalone, non-independent) architecture. If the 5G network is deployed according to the NSA architecture, the terminal is required to support simultaneous connection of 4G and 5G. Dual connection technology needs to use dual an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/525H04B1/10
CPCH04B1/10H04B1/525
Inventor 张中山徐海祥金麟张明洋
Owner UNIV OF SCI & TECH BEIJING
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