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Sub carrier distribution method for orthogonal frequency division multiplexing power line carrier communication system

A power line carrier and sub-carrier allocation technology, which is applied in the sub-carrier allocation and data transmission fields to improve the effect of countermeasures

Active Publication Date: 2015-04-22
SOI MICRO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention aims at the problem of strong interference and strong attenuation brought by the power line channel environment to the OFDM power line carrier communication system, and provides a subcarrier allocation method for the OFDM power line carrier communication system

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  • Sub carrier distribution method for orthogonal frequency division multiplexing power line carrier communication system
  • Sub carrier distribution method for orthogonal frequency division multiplexing power line carrier communication system
  • Sub carrier distribution method for orthogonal frequency division multiplexing power line carrier communication system

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Embodiment Construction

[0025] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0026] Such as figure 1 as shown, figure 1 It is a flow chart of the subcarrier allocation method of the OFDM power line carrier communication system according to the present invention, the method comprising the following steps:

[0027] Step 101: Determine the parameters of the subcarrier allocation of the OFDM power line carrier communication system;

[0028] The parameters of subcarrier allocation in the OFDM power line carrier communication system in step 101 include at least the total number of subcarriers, the number of pilots, the interval between pilots, the number of data subcarriers, the number of frequency spreading and the number of subcarrier rotations.

[0029] Wherein, the total number of subcarriers=the ...

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Abstract

The invention discloses a sub carrier distribution method for an orthogonal frequency division multiplexing (OFDM) power line carrier communication system. The method comprises the following steps of: determining all parameters of sub carrier distribution of the OFDM power line carrier communication system; interpolating known pilots into an occupied frequency band at equal intervals according to the number of pilots, and reserving residual sub carriers to data sub carriers; and interpolating the data sub carriers according to a formula Ck(n)=mod(n+(k-1)*s, n) to finish sub carrier distribution, wherein n is between 0 and N-1. By the method, strong-interference resistance and the strong attenuation resistance of the OFDM power line carrier communication system can be effectively improved.

Description

technical field [0001] The present invention relates to the field of data transmission, in particular to the technical field of subcarrier allocation in an Orthogonal Frequency Division Multiplexing (OFDM) power line carrier communication system. Background technique [0002] The sum of all end devices needed to communicate information is called a communication system. Generally speaking, people will formulate different communication protocols or standards according to the environment in which the communication system is applied to regulate the communication system in this application field. The formulation of the communication protocol is the premise of the standardization of the communication system and the basis for the implementation and application of the subsequent communication system, so it is of great significance. [0003] The formulation of the communication system protocol requires a very in-depth study of the application environment of the communication system ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26H04B3/54
Inventor 黑勇李春阳乔树山
Owner SOI MICRO CO LTD