PLC channel pulse noise detection method and system using F square module

Abstract

An embodiment of the invention discloses a PLC channel pulse noise detection method and a PLC channel pulse noise detection system using an F square module. The PLC channel pulse noise detection method comprises the steps of: 101, acquiring a signal sequence S collected according to a time sequence; 102, solving a data delay factor K; 103, generating an n-th signal delay sequence delta S<n>; 104,solving a Gaussian initial matrix Q<0>; step 105, initializing an iterative control parameter k; step 106, solving a Gaussian optimization updating matrix Q<k+1>; 107, solving an F square modulus error epsilon<k+1>; 108, judging whether the F square modulus error epsilon<k+1> is greater than or equal to a preset threshold epsilon<0> or not; 109, solving an F square modulus optimization factor H<n>; and 110, judging 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...

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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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