Method for reducing narrowband noise interference in power line carrier communication

Abstract

The invention discloses a method for reducing narrowband noise interference in power line carrier communication. The method comprises the following steps of: setting a sub-band length and dividing an effective sub-carrier into N sub-bands with equal sub-band length, wherein the N is a natural number; calculating the size of a data block according to the sub-band length and dividing data to be transmitted into data blocks according to the size of the data block; performing cyclic redundancy check (CRC) coding and error correction coding on every divided data block; repeating the data blocks which are subjected to coding processing for N times in a frequency domain, and mapping the repeated data blocks into the N sub-bands of one orthogonal frequency division multiplexing (OFDM) symbol so as to modulate, frame and transmit the data; after the modulated, framed and transmitted data is received, deframing and demodulating the data, and performing decoding and the CRC on the demodulated data according to the data blocks, acquiring correct data and processing the correct data by using successive parts. By the method, the problem of insufficient narrowband noise resistance in the conventional power line communication scheme is solved, and system realizing complexity is reduced.

Description

A Method of Reducing Narrowband Noise Interference in Power Line Carrier Communication technical field The invention relates to the technical field of power line carrier communication, in particular to a method for reducing narrow-band noise interference in power line carrier communication. Background technique Advanced Metering Infrastructure (AMI) is an important part of the smart grid, and power line communication is the basis of AMI. my country's power grid is huge and complex, and the channel environment is extremely harsh. The channel characteristics are different in different frequency bands, different times, and different locations. Especially in the low frequency band, narrow-band noise interference is very serious, which brings great challenges to system design. Orthogonal frequency division multiplexing (OFDM) technology is a multi-carrier modulation (MCM) technology, which has good anti-multipath and anti-noise characteristics, and has high spectrum utilization...

AI Technical Summary

Problems solved by technology

In view of this, the main purpose of the present invention is to provide a method for reducing narrowband noise interference in power line carrier communication, to solve the problem of insufficient narrowband noise resistance in existing power line communication solutions, and to reduce the complexity of system implementation

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