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PLC channel impulse noise detection method and system using offset

A technology of noise detection and channel pulse, which is applied in the field of communication, can solve problems such as low transmission power, high noise intensity, and low signal-to-noise ratio, and achieve the effects of improved detection performance, simple calculation, and good robustness

Inactive Publication Date: 2020-10-09
GUANGDONG UNIV OF PETROCHEMICAL TECH
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Problems solved by technology

[0003] Although the power line communication system has a wide range of applications and the technology is relatively mature, a large number of branches and electrical equipment in the power line communication system will generate a lot of noise in the power line channel; among them, random impulse noise has great randomness, and the noise intensity High, causing serious damage to the power line communication system, therefore, the suppression technology for random impulse noise has been the focus of research by domestic and foreign scholars; and the noise model does not conform to the Gaussian distribution
Therefore, the traditional communication system designed for Gaussian noise is no longer applicable to the power line carrier communication system, and the corresponding noise suppression technology must be studied to improve the signal-to-noise ratio of the power line communication system, reduce the bit error rate, and ensure the quality of the power line communication system
In practical applications, some simple nonlinear techniques are often used to eliminate power line channel noise, such as Clipping, Blanking and Clipping / Blanking techniques, but these research methods must work well under a certain signal-to-noise ratio. In order to eliminate the impact noise, in the power line communication system, some commercial power line transmitters are characterized by low transmission power. In some special cases, the transmission power may even be lower than 18w. Therefore, in some special cases, the signal will be Submerged in a large amount of noise, leading to low signal-to-noise ratio conditions in power line communication systems

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  • PLC channel impulse noise detection method and system using offset
  • PLC channel impulse noise detection method and system using offset
  • PLC channel impulse noise detection method and system using offset

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Embodiment Construction

[0030] 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. Apparently, the described embodiments are only some of the embodiments of the present invention, but 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 belong to the protection scope of the present invention.

[0031] 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 accompanying drawings and specific embodiments.

[0032] figure 1 Schematic flow chart of a PLC channel impulse noise detection method using offset

[0033] figure 1 It is a schematic flowchart of a PLC channel impulse noise detection method using an offse...

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Abstract

The embodiment of the invention discloses a PLC channel impulse noise detection method and system using offset. The method comprises the steps: 101, acquiring a signal sequence S collected according to the time sequence; 102, solving N signal differential delay sequences; 103, solving N DFT coefficient sequences; 104, solving N normalized DFT coefficient sequences; 105, solving N central frequencyoffsets; 106, solving a judgment threshold value; 107, detecting the PLC impulse noise.

Description

technical field [0001] The invention relates to the communication field, in particular to a detection method and system for PLC channel impulse noise. 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. 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 3k to 500kHz; power line communication technology includes The regulated bandwidth of CENELEC in Europe (3148.5kHz), the regulated bandwidth of the U.S. Federal Communications Commission (FCC) (9490kHz), the regulated bandwidth of Japan’s Association of Radio Industries and Businesses (ARIB) (9450kHz), an...

Claims

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Application Information

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IPC IPC(8): H04B17/309H04B17/345
CPCH04B17/309H04B17/345
Inventor 翟明岳
Owner GUANGDONG UNIV OF PETROCHEMICAL TECH
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