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Error correction encoding method for power line communication

A technology of power line communication and error correction coding, which is applied in the field of error correction coding of power line communication, and can solve the problems of high hardware implementation complexity, large differences, and difficulty in overall optimization

Active Publication Date: 2014-01-29
STATE GRID INFORMATION & TELECOMM BRANCH +1
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Problems solved by technology

In traditional multi-code-length coding schemes, the H matrices of LDPC codes with different code lengths are often relatively independent, with large differences. High hardware implementation complexity
[0008] At present, in the field of power line communication, there is no error correction coding method that can adapt to various business modes and various channel conditions

Method used

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  • Error correction encoding method for power line communication
  • Error correction encoding method for power line communication
  • Error correction encoding method for power line communication

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Embodiment Construction

[0034] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0035] figure 1 It is a flow chart of the error correction coding method for power line communication described in the embodiment of the present invention. Such as figure 1 As shown, the method includes the steps of:

[0036] S100: Group the binary digital information that needs to be transmitted through the power line into groups of 128 bits, and multiply the 128 bits in each group of binary digital information by the generation matrix G corresponding to LDPC (512, 128) qc2 Perform LDPC encoding to obtain a code word C with a code length of 512 bits qc2 .

[0037] LDPC(N, K) represents an abbreviated form of an LDPC code whose code length is N and information bit len...

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Abstract

The invention discloses an error correction encoding method for power line communication, and relates to the field of digital communication. The method comprises the following steps of: grouping binary digital information to be transmitted by a power line, and performing low density parity check (LDPC) encoding on the binary digital information of each group to obtain codewords corresponding to the binary digital information of each group; grouping the codewords, and mapping the codewords of each group to obtain digital signals corresponding to the codewords of each group; performing orthogonal frequency division multiplexing modulation on the digital signals to obtain the data parts of frame signals; adding leader sequences and frame control information to the data parts to obtain complete frame signals; and performing digital-to-analogue conversion on the complete frame signals, transmitting the converted frame signals to a power line channel for transmission, and decoding the complete frame signals according to a preset check matrix at a receiver. The error correction encoding method can be adapted to a plurality of service modes and a plurality of channel conditions, and has vast application prospect.

Description

technical field [0001] The invention relates to the technical field of digital communication, in particular to an error correction coding method for power line communication. Background technique [0002] Power line communication refers to a communication technology that uses power lines as a carrier for data transmission. The power line communication system can provide transmission channels for automatic meter reading, power distribution automation, load control, demand side management, etc. of power companies, and can also be used in smart homes to realize remote control of various smart home appliances. Due to the existence of various noises such as burst noise, colored background noise, and interference from other electrical equipment in the power line channel, it is very necessary to perform error control coding on the information to be transmitted. [0003] LDPC (Low Density Parity Check, Low Density Parity Check) code is a kind of special linear block code based on s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00H04B3/54
Inventor 刘建明赵丙镇王一蓉耿亮袁洲宋健张奇杨昉
Owner STATE GRID INFORMATION & TELECOMM BRANCH
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