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Method and system for filtering non-stationary non-Gaussian noise from PLC communication signals

A non-Gaussian noise, communication signal technology, applied in the direction of signal transmission/reception through power distribution, distribution line transmission system, improving the signal-to-noise ratio of transmission/reception, etc., can solve the problem of non-stationary non-Gaussian noise filtering efficiency. And other issues

Inactive Publication Date: 2019-01-04
GUANGDONG UNIV OF PETROCHEMICAL TECH
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Problems solved by technology

[0005] The purpose of the present invention is to provide a method and system for filtering non-stationary and non-Gaussian noise in PLC communication signals to solve the problem of low filtering efficiency of non-stationary and non-Gaussian noise in PLC communication systems

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  • Method and system for filtering non-stationary non-Gaussian noise from PLC communication signals
  • Method and system for filtering non-stationary non-Gaussian noise from PLC communication signals

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[0053] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0054] The object of the present invention is to provide a method and system for filtering non-stationary and non-Gaussian noise in PLC communication signals, which can improve the filtering efficiency of non-stationary and non-Gaussian noise in PLC communication system.

[0055] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction...

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Abstract

The invention discloses a method and system for filtering non-stationary non-Gaussian noise from PLC communication signals. The filtering method comprises that an actually measured PLC signal sequenceand the multi-dimension decomposition layer number in a PLC communication system are obtained; each layer of filtered PLC communication signal sequence is determined according to the multi-dimensiondecomposition layer number and a multilayer low pass filter cutoff frequency; the length of a time window of the present layer is determined according to the filtered PLC communication signal sequencein the present layer; an analysis sequence is constructed; pseudo Wigner-Ville distribution of the analysis sequence in the length of the time window of the present layer is determined; each layer ofthe filtered PLC communication signal sequence is recovered according to pseudo Wigner-Ville distribution, and a recovered PLC communication signal sequence is determined; and from the last of the multi-dimension decomposition layer number, non-stationary non-Gaussian noise is filtered from the PLC communication system according to the recovered PLC communication signal sequence of the present layer and the interpolated PLC communication signal sequence of the last layer. Thus, the non-stationary non-Gaussian noise can be filtered from the PLC communication system effectively.

Description

technical field [0001] The invention relates to the communication field, in particular to a method and system for filtering out non-stationary and non-Gaussian noise in PLC communication signals. Background technique [0002] Compared with various wired communication technologies, power line communication has the advantages of no need for rewiring, easy networking, etc., and has broad application prospects. The power line communication technology is divided into narrowband power line communication (narrowband over powerline, nPL) and broadband power line communication (Broadband overpowerline, BPL). Narrowband power line communication refers to the power line carrier communication technology with a bandwidth limited to 3k~500kHz, specifically including the specified bandwidth (3~148.5kHz) of European CEnELEC, the specified bandwidth (9~490kHz) of the US Federal Communications Commission (fCC), and the Japanese wireless industry And the specified bandwidth (9~450kHz) of the ...

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Application Information

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IPC IPC(8): H04B3/54H03H21/00
CPCH03H21/0012H03H21/0043H03H2021/0094H04B3/54H04B2203/5425
Inventor 翟明岳
Owner GUANGDONG UNIV OF PETROCHEMICAL TECH
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