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A power line OFDM modulation method and device

A modulation method and power line technology, applied in distribution line transmission systems, electrical components, phase modulation carrier systems, etc., can solve the problems of weak anti-interference ability, poor effect, and low data rate of narrow-band modulation technology, and achieve high quality and high quality. The effect of rate communication

Active Publication Date: 2016-09-28
深圳市力合微电子股份有限公司
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  • Application Information

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Problems solved by technology

However, these traditional modulation techniques have the following disadvantages: 1) The anti-interference ability is relatively weak; 2) The data rate of the narrowband modulation technique is very low
[0007] However, a series of field tests have shown that applying foreign technology or products to China's power lines has very poor results

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  • A power line OFDM modulation method and device
  • A power line OFDM modulation method and device
  • A power line OFDM modulation method and device

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Embodiment Construction

[0046] The description will be further elaborated below in conjunction with specific embodiments. It should be understood that this embodiment is only used to illustrate the present invention but not to limit the scope of the present invention. For those of ordinary skill in the technical field of the present invention, without departing from the concept of the present invention, some simple deduction or replacement can be made, which should be regarded as belonging to the protection scope of the present invention.

[0047] figure 1 Schematic diagram of multi-carrier spectrum modulated by OFDM multi-carrier, figure 2 It is a flowchart of a specific embodiment of the power line OFDM modulation method of the present invention and includes the following steps:

[0048] A data encoding step, encoding the original data;

[0049] A time domain interleaving step, interleaving the coded data in the time domain;

[0050] The constellation mapping step is to map the interleaved bit...

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Abstract

The invention discloses a power line OFDM modulation method and device. The method comprises the step of data coding: coding original bit data, the step of time domain interleaving: interleaving the coded data on a time domain, the step of constellation mapping: mapping the interleaved bit data into frequency domain symbols on a frequency domain, the step of frequency domain interleaving: interleaving the frequency domain symbols on the frequency domain, and the step of inverse discrete Fourier transform: carrying out inverse discrete Fourier transform on the frequency domain symbols and changing the frequency domain symbols into OFDM time domain signals. The power line OFDM modulation method and device have the advantages that under the electric power environment with strong electromagnetic interference, communication with high quality and high speed rate is achieved, and communication requirements of the Chinese electric power environment and other electric power environments similar to the Chinese electric power environment are met.

Description

【Technical field】 [0001] The invention belongs to the field of power line carrier communication, and in particular relates to a power line OFDM modulation method and device. 【Background technique】 [0002] Power Line Carrier (PLC) communication technology is referred to as PLC, which refers to a communication method that uses power lines as an information transmission medium for data transmission. It can make full use of the existing power distribution network infrastructure and provide users with data communication services without any wiring. Using the existing power line to realize data communication can greatly save the construction cost of the communication network. With the continuous rise of domestic smart grid and smart home network, power line carrier communication has won a period of rapid development. [0003] But there are many factors that affect and restrict the development of power line carrier communication, the most important one is the complex channel on ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/20H04L27/34H04L5/00H04B3/54
Inventor 不公告发明人
Owner 深圳市力合微电子股份有限公司