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A Channel Estimation Method for Power Line Communication Disturbed by Impulse Noise

A technology of power line communication and impact noise, applied in channel estimation, distribution line transmission system, electrical components, etc.

Active Publication Date: 2018-04-17
GUILIN UNIV OF ELECTRONIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is the influence of impact noise on power line communication channel estimation, and a power line communication channel estimation method interfered by impact noise is provided, which has the characteristics of small estimation error and high precision

Method used

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  • A Channel Estimation Method for Power Line Communication Disturbed by Impulse Noise
  • A Channel Estimation Method for Power Line Communication Disturbed by Impulse Noise
  • A Channel Estimation Method for Power Line Communication Disturbed by Impulse Noise

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Embodiment Construction

[0034] A channel estimation method for power line communication disturbed by impulsive noise, such as figure 1 shown, including the following steps:

[0035] Step A. Receive a signal from the power line.

[0036] The receiver receives the signal y(n) in the following form:

[0037]

[0038] in, Represents the convolution operation, β(n) represents the unit impulse response of the power line communication channel, ε(n)=w(n)+p(n) represents the superposition of additive Gaussian white noise and impulse noise, w(n) represents the additive Gaussian white noise, p(n) represents impulsive noise.

[0039] Assuming that the receiving end processes in units of N points, and the channel length is d points, then formula (1) can be written in the form of the following matrix:

[0040]

[0041] Respectively order:

[0042]

[0043]

[0044]

[0045]

[0046] Then formula (2) is expressed as:

[0047]

[0048] Step B. Estimate the truncation length h according to...

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Abstract

The invention discloses a channel estimation method for power line communication affected by impact noise, comprising the steps of receiving a signal from a power line, estimating the trimmed length according to the characteristics of impact noise, and carrying out channel estimation by a least trimmed squares algorithm. According to the invention, the pollution rate of impact noise is estimated and the trimmed length is determined according to the characteristics of impact noise, power line channel estimation is carried out by the least trimmed squares algorithm, and large-residual data polluted by impact noise is eliminated to improve the accuracy of channel estimation.

Description

technical field [0001] The invention relates to the technical field of communication channel estimation, in particular to a power line communication channel estimation method interfered by impact noise. Background technique [0002] Power Line Communication (PLC) refers to the use of power distribution lines as a medium to communicate using a power line network. Data is transmitted on the same power line as the power supply, so that existing power infrastructure such as houses can be used to transmit data without the need for new wires. Power line communication technology is going through a phase of rapid growth and finding its way into several applications and market segments, including smart grids, lighting control, energy metering, and more. The global drive to conserve energy has fueled the need for energy-generating and energy-consuming devices to communicate with each other. Power line communication provides a unique method without building new facilities, enabling s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/02H04B3/54
CPCH04B3/54H04L25/024H04L25/025H04L25/0256H04L25/0266
Inventor 闫坤张华伟王成旭肖海林
Owner GUILIN UNIV OF ELECTRONIC TECH