Method and device for eliminating harmonic interference

A technology for harmonic interference and harmonic elimination. It is applied in the field of communication and can solve problems such as network drop, throughput loss, and deterioration of received signal sensitivity.

Active Publication Date: 2019-08-27
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, harmonic interference will lead to a serious deterioration of the sensitivity of the received signal, causing problems such as network disconnection that seriously affect the user experience
At the same time, there is a large loss in throughput when the signal-to-noise ratio is medium or high. The stronger the harmonic interference, the greater the performance loss.

Method used

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  • Method and device for eliminating harmonic interference
  • Method and device for eliminating harmonic interference
  • Method and device for eliminating harmonic interference

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Embodiment Construction

[0087] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0088] At present, typical harmonic elimination schemes are divided into frequency domain and time domain. figure 1 It is a solution of frequency domain harmonic elimination in the prior art. Such as figure 1 As shown, the frequency-domain harmonic elimination first transforms the received signal into the frequency domain through Fourier Transform (FFT for short), and then counts the power of each frequency point signal and judges it with a preset thresho...

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Abstract

The invention provides a method for eliminating harmonic interference. The comprises the steps of determining a harmonic shifting amount which is a difference between a harmonic interference frequency point and a central frequency point of a receiving signal; determining the harmonic amplitude and the harmonic phase of a harmonic interference signal included in the receiving signal according to the receiving signal and the harmonic shifting amount; determining the harmonic interference signal according to the harmonic amplitude and the harmonic phase; and subtracting the harmonic interference signal from the receiving signal, thus eliminating the harmonic interference signal in the receiving signal. Therefore, according to the method provided by the invention, interference to the receiving signal caused by the harmonic signal is effectively solved, and the sensitivity performance of a receiver is improved, so that the performance of the receiver is not influenced by the strength of the harmonic signal, and the receiver has high robustness.

Description

technical field [0001] The invention relates to the communication field, in particular to a method and device for eliminating harmonic interference in the communication field. Background technique [0002] Narrowband interference is an important problem to be solved in wireless signal processing. Clock harmonic interference is a kind of narrow-band interference, which is a single-frequency interference signal. Harmonic interference is caused by sources such as radio frequency (Radio Frequency, referred to as "RF") crystal oscillator harmonics and analog baseband (Analog Base Band, referred to as "ABB") sampling clock harmonics. When the harmonic components of the crystal oscillator or sampling clock are coupled After reaching the RF high-frequency input port and passing through the mixer (Mixer), it becomes the in-band interference of the received signal. [0003] As the area of ​​RF chips becomes smaller and the wiring of smart terminal products becomes denser, the proble...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/10H04B1/16
Inventor 张志伟
Owner HUAWEI TECH CO LTD
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