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A power line communication signal filtering method and system

A power line communication and signal filtering technology, which is applied in distribution line transmission systems, baseband system components, line transmission components, etc., can solve problems affecting the performance of PLC communication systems and poor performance in filtering out pulse noise, and achieve filtering Effect of removing impulse noise and ensuring quality

Active Publication Date: 2021-09-17
GUANGDONG UNIV OF PETROCHEMICAL TECH
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Problems solved by technology

[0004] With the application and popularization of non-linear electrical appliances (such as juice machines using motors, coffee machines, soybean milk machines, etc.), more and more impulse noises appear in PLC communication signals. The instantaneous power of such noises is very large, showing It has obvious non-stationary and non-Gaussian characteristics, but the commonly used low-pass filter does not perform well in filtering out impulse noise, which seriously affects the performance of the PLC communication system

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  • A power line communication signal filtering method and system
  • A power line communication signal filtering method and system
  • A power line communication signal filtering method and system

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Embodiment Construction

[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 purpose of the present invention is to provide a power line communication signal filtering method and system, which can effectively filter out the pulse noise in the PLC signal and ensure the quality of the power line 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 with the accompanyin...

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Abstract

The invention relates to a power line communication signal filtering method and system, and relates to the technical field of power systems. The method includes: using the difference of elements in the real-time power line communication signal sequence to determine the signal difference sequence; using the power line communication signal sequence and the signal difference sequence to determine the expected sequence; using the signal difference sequence and the expected sequence to determine the Lagrangian function matrix; using Lagrangian function matrix to determine Lagrangian factor vector; use Lagrangian function matrix and Lagrangian factor vector to determine Lagrangian optimal matrix; use Lagrangian optimal matrix to power line communication signal sequence Filtering is performed to obtain a filtered signal sequence. The present invention introduces the Lagrangian factor vector, utilizes the Lagrangian function matrix and the Lagrangian factor vector to determine the Lagrangian optimal matrix, and utilizes the Lagrangian optimal matrix to filter the power line communication signal sequence, Effectively filter out the pulse noise in the PLC signal.

Description

technical field [0001] The present invention relates to the technical field of power systems, in particular to a power line communication signal filtering method and system. Background technique [0002] Compared with various wired communication technologies, Power Line Communications (PLC) has the advantages of no need for rewiring and easy networking, and has broad application prospects. The power line communication technology is divided into narrowband power line communication (Narrowband over power line, NPL) and broadband power line communication (Broadband over power line, BPL). Narrowband power line communication refers to the power line carrier communication technology with a bandwidth limited to 3kHz to 500kHz, including the specified bandwidth (3 to 148.5kHz) of the European Committee for Electrotechnical Standardization (CENELEC) and the regulations of the US Federal Communications Commission (FCC). Bandwidth (9-490kHz), Japan's Association of Radio Industries an...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B3/54H04L25/08
CPCH04B3/46H04B3/54
Inventor 翟明岳
Owner GUANGDONG UNIV OF PETROCHEMICAL TECH
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