Broadband power line carrier communication physical layer signal processing method based on OFDM

A broadband power line and carrier communication technology, applied in baseband systems, modulated carrier systems, distribution line transmission systems, etc., can solve problems such as strong signal attenuation, complex interference noise, and small line impedance

Active Publication Date: 2017-04-26
CHINA ELECTRIC POWER RES INST +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The low-voltage power grid is not designed to transmit high-speed data. The components that make up the power grid are designed to minimize the loss of power transmission and ensure reliable transmission

Method used

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  • Broadband power line carrier communication physical layer signal processing method based on OFDM
  • Broadband power line carrier communication physical layer signal processing method based on OFDM
  • Broadband power line carrier communication physical layer signal processing method based on OFDM

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[0087] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention, but the cited embodiments are not intended to limit the present invention.

[0088] OFDM converts a group of high-speed serial data streams into low-speed parallel data streams, and then modulates these parallel data on mutually orthogonal sub-carriers to achieve parallel data transmission. OFDM technology has the advantages of strong anti-inter-symbol interference, strong anti-fading ability, strong anti-burst noise ability, and high spectrum utilization. According to the characteristics of power line channels, OFDM technology can be used in power line communications to counter the attenuation of power line channels and the various noise and interference introduced to meet the requirements of smart grids in terms of reliability, safety, and timeliness.

[0089...

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Abstract

The invention discloses a broadband power line carrier communication physical layer emission signal processing method based on OFDM. The method includes: receiving data from a link layer, and dividing the data into frame control data and load data; performing channel coding on the frame control data and the load data, and modulating the frame control data and the load data after channel coding to subcarriers; performing inverse Fourier transform on the modulated frame control data and the load data, performing power control, and generating a time domain frame control symbol and a time domain load symbol; and adding a cyclic prefix to the time domain frame control symbol and the time domain load symbol, adding a time domain leading symbol, performing windowing processing, and generating physical layer emission signals. According to the method, the utilization rate of the frequency band is high, the transmission rate is high, and the intersymbol interference resistance and the channel fading resistance are excellent.

Description

technical field [0001] The present invention relates to the technical field of power line carrier communication, specifically, a method for generating a physical layer transmission signal of a PLC (Power Line Communication, broadband power line carrier communication) based on OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing), It can be used in power line carrier communication system. Background technique [0002] Power line carrier communication is a wired communication technology that utilizes power wiring to transmit and receive communication signals. Due to the wide distribution of power line networks, using power lines as communication media does not require indoor perforated wiring to rebuild communication networks. It has the advantages of low cost and convenient connection, and has attracted more and more attention in smart grid and broadband access. [0003] The communication channel is the basis of communication. Like wir...

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Application Information

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IPC IPC(8): H04L27/26H04L1/00H04B3/54
CPCH04B3/542H04L1/0071H04L27/2601H04L27/2627H04L27/2628H04L25/03834H04L27/2602H04L27/2613H04L27/2663H04L1/0041H04L1/0066H04L1/04H04L27/26412H04B2203/54H04L27/0008H04L27/2634
Inventor 张海龙刘宣唐悦章欣赵兵闫梓桐
Owner CHINA ELECTRIC POWER RES INST
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