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Method for reducing narrowband noise interference in power line carrier communication

A technology of narrow-band noise interference and power line carrier, applied in distribution line transmission systems, electrical components, digital transmission systems, etc., can solve problems such as insufficient ability to resist narrow-band noise, reduce system implementation complexity, etc., achieve simple and effective coding scheme, Improved stability and reliability, low complexity effects

Inactive Publication Date: 2013-08-07
BEIJING SMART NETWORKS NENGDA TECH
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  • Claims
  • Application Information

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Problems solved by technology

[0005] 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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  • Method for reducing narrowband noise interference in power line carrier communication
  • Method for reducing narrowband noise interference in power line carrier communication

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Embodiment Construction

[0025] In order to make the objectives, technical solutions, and advantages of the present invention clearer, the following further describes the present invention in detail with reference to specific embodiments and drawings.

[0026] figure 1 It is the flow chart of the method for reducing the narrow-band noise interference in power line carrier communication provided by the present invention. figure 1 The process shown starts from the subband division 101 of effective subcarriers and ends with data decoding and verification 108. figure 2 Is the subcarrier distribution and data frequency domain mapping, starting from C n1 Subcarrier to C n2 The number sub-carriers are valid sub-carriers, and the remaining sub-carriers are virtual sub-carriers that are shielded.

[0027] The method for reducing narrowband noise interference in power line carrier communication provided by the present invention is implemented based on OFDM technology and is suitable for anti-narrowband noise interfer...

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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

Technical field [0001] The present invention relates to the technical field of power line carrier communication, and in particular to a method for reducing narrowband noise interference in power line carrier communication. Background technique [0002] Advanced Metering Infrastructure (AMI) is an important part of the smart grid, and power line communication is the foundation 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, at different times, and at different locations, especially in low frequency bands. Narrowband noise interference is very serious, which brings great challenges to system design. Orthogonal frequency division multiplexing (OFDM) technology is a kind of multi-carrier modulation (MCM) technology, which has good anti-multipath and anti-noise characteristics, and has high spectrum utilization efficiency. It can not only improve the spectrum ut...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00H04L27/26H04B3/54
Inventor 郭斌
Owner BEIJING SMART NETWORKS NENGDA TECH