Power line anti-noise channel estimation method

A channel estimation and power line technology, applied in the distribution line transmission system, electrical components, baseband system, etc., can solve the problems of AMR system lack of noise impact elimination means, to ensure feasibility and effectiveness, reduce bit error rate, The effect of a good initial environment

Inactive Publication Date: 2017-06-20
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0005] In view of this, the present invention provides an anti-noise channel estimation method in a power line communication network in order to solve the lack of effective and easy-to-implement noise effect elimination means in the existing AMR system

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Embodiment Construction

[0016] The present invention will be described in detail below in conjunction with specific embodiments, and the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not as a limitation to the present invention.

[0017] figure 1 It is an analysis of the noise components in the power line communication system. The additive noise is mainly divided into five categories. The colored background noise, narrowband noise and power frequency asynchronous periodic pulse noise have small power, change slowly with time, and cause less damage to the communication system. Small. The power frequency synchronous periodic pulse noise and random pulse noise are the main noise components in the PLC communication system, and the random pulse noise is the main elimination object considered in the present invention.

[0018] figure 2 It is a schematic diagram of a nonlinear processor according to an embodiment of the present invention. ...

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Abstract

The invention discloses an interference noise elimination method suitable for a power line carrier (PLC) communication network, which is mainly used for solving the impulse interference noise which appears randomly and has high energy causes performance attenuation of the whole communication system in the PLC network. The method mainly comprises two parts of receiver-side signal amplitude pretreatment and robust channel estimation. The initial filtering of the impulse interference noise is performed according to the statistical characteristics of received signals by the receiver-side signal amplitude pretreatment, and the influence on the residual noise is further weakened by the robust channel estimation. Compared with other conventional power line noise elimination algorithms, the method provided by the present invention is characterized by a relatively low complexity and being insensitive to noise change. The method eliminates the power line noise from the viewpoint of practical feasibility and effectiveness, so that the bit error rate is reduced during the power line carrier transmission, and the system reliability can be improved.

Description

technical field [0001] The invention relates to the field of power line carrier communication, in particular to a noise elimination method in a low-voltage power line communication data acquisition system. Background technique [0002] In the power line carrier communication network, since the original intention of the transmission medium is to transmit electrical signals, there are problems of unsatisfactory channel environment in the process of data signal transmission, which are mainly manifested in communication channel sharing, low transmission rate, and sudden interference noise. And strong, greatly affected by environmental factors, resulting in communication failure or link damage. Therefore, in the automatic meter reading (Automatic Meter Reading, AMR) system, finding an adaptive noise suppression algorithm is an effective means to solve the problem that restricts the reliability of power line carrier communication. At present, the algorithms in this aspect can be ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B3/54H04L25/02H04L27/26
CPCH04B3/54H04L25/0212H04L27/265
Inventor 谢刚毛敏刘元安高锦春赵超吴广宇刘凯明
Owner BEIJING UNIV OF POSTS & TELECOMM
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