Method for frequency domain information extension of data symbols in power line carrier communication

A power line carrier and data symbol technology, which is applied in the field of frequency domain information expansion, can solve the problems of reducing reliability and increasing receiving errors, and achieve the effect of simplifying processing circuits and improving communication reliability

Active Publication Date: 2020-04-24
WU QI TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Usually, the power line channel shows obvious time-varying characteristics. When ROBO expansion is used to generate data symbols, the same information bit is mapped to different symbols, which will increase the probability of receiving errors and reduce reliability.

Method used

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  • Method for frequency domain information extension of data symbols in power line carrier communication
  • Method for frequency domain information extension of data symbols in power line carrier communication
  • Method for frequency domain information extension of data symbols in power line carrier communication

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Embodiment Construction

[0035] based on the following Figure 1 to Figure 5 , specifically explain the preferred embodiment of the present invention.

[0036] Such as Figure 4 As shown, the present invention provides a method for generating data symbols in power line carrier communication, which specifically includes the following steps:

[0037] Step S1, performing scrambling processing on the data to be transmitted;

[0038] Step S2, performing turbo encoding on the scrambled data;

[0039] Step S3, performing channel interleaving on the Turbo coded data;

[0040] Step S4 , performing frequency-domain information diversity expansion on the data after channel interleaving multiple times in the same symbol to generate data symbols.

[0041] Such as Figure 5 As shown, in step S4, the step of performing frequency-domain information diversity expansion multiple times specifically includes:

[0042] The N information bits are grouped according to the number of diversity extensions B×M, and each g...

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Abstract

A method for extending frequency domain information on data symbols in power line carrier communication, when generating data symbols in power line carrier communication, the original ROBO expansion is replaced by multiple times of frequency domain information diversity expansion, and the diversity expansion has nothing to do with the time-varying nature of the channel, It is only related to the characteristics of the channel, and the diversity extension is completed in the same symbol, which is beneficial to simplify the processing circuit in the frequency domain and improve communication reliability at the same time.

Description

technical field [0001] The invention relates to a method for expanding frequency domain information on data symbols in power line carrier communication. Background technique [0002] With the application of power line carrier communication technology more and more widely, people have more and more strict requirements on the reliability of information transmission through power line media, and the national grid power line transmission standard was born (hereinafter referred to as the national grid standard). Such as figure 1 As shown, it is a schematic diagram of the communication frame format in the technical standard of the State Grid Corporation of China. The order of the communication frame in terms of time is: at the beginning there are 13 leading symbols, followed by 4 or 12 frame control character symbols, and finally the transmission data symbol. Such as figure 2 As shown, it is the description of the generation method of the frame control character in the nationa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/34H04L27/26H04B3/54
CPCH04B3/54H04L27/2602H04L27/2605H04L27/34H03M13/27H03M13/2957H04L5/0044H03M13/2771
Inventor 韦韧古强李洪兵陈佰儒曾安辉
Owner WU QI TECH INC
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