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OFDM (Orthogonal Frequency Division Multiplexing) modulation-based single-twisted-pair Ethernet transmission system and method

A transmission system, F-OFDM technology, applied in the field of single-pair twisted-pair Ethernet transmission system, can solve the problems of poor anti-interference, short transmission distance, etc., to ensure real-time and deterministic, improve system transmission bandwidth and transmission effect of distance

Active Publication Date: 2022-03-04
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the traditional industrial Ethernet communication physical layer is based on the single-carrier modulation technology of PAM (Pulse Amplitude Modulation, Pulse Amplitude Modulation). Disadvantages such as poor interference

Method used

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  • OFDM (Orthogonal Frequency Division Multiplexing) modulation-based single-twisted-pair Ethernet transmission system and method
  • OFDM (Orthogonal Frequency Division Multiplexing) modulation-based single-twisted-pair Ethernet transmission system and method
  • OFDM (Orthogonal Frequency Division Multiplexing) modulation-based single-twisted-pair Ethernet transmission system and method

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Embodiment 1

[0031] In order to solve the problems existing in the prior art, the present invention provides the following solutions:

[0032] In the single-pair twisted-pair Ethernet transmission system based on OFDM modulation proposed by the present invention, OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing) technology is innovatively used in the single-pair twisted-pair Ethernet physical layer, Compared with the traditional single-carrier modulation technology, this technology can greatly improve the utilization rate of the Ethernet frequency band and improve the anti-interference ability during channel transmission, especially suitable for industrial Ethernet environments. At the same time, it will not reduce the bandwidth while increasing the Ethernet data transmission distance, especially for industrial Ethernet sites with medium-distance and high-bandwidth requirements.

[0033] like figure 1 as shown, figure 1 It is a structural diagr...

Embodiment 2

[0062] The present invention also provides a single-pair twisted-pair Ethernet transmission method based on OFDM modulation:

[0063] Figure 4 It is a flow chart of the steps of the method for implementing OFDM modulation-based single-pair twisted-pair Ethernet transmission in the present invention. like Figure 4 As shown, the present invention realizes the single-pair twisted-pair Ethernet transmission system based on OFDM modulation, comprising the steps:

[0064] Firstly, the MPDU (Media Protocol Data Unit, Media Protocol Data Unit) is obtained from the MAC chip through the GMII interface, and the data unit is distributed to four channels of different frequency bands as required;

[0065] The data in each channel is first scrambled, then forward-coded by a cascaded coding system, and then interleaved and coded to obtain coded data units.

[0066] The coded data unit needs to be modulated at a higher order. According to the channel conditions, the data of different subc...

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Abstract

The invention discloses a single twisted pair Ethernet transmission system and method based on OFDM modulation, and the system comprises a transmitter and a receiver. Wherein the transmitter is used for receiving data transmitted by the Ethernet, segmenting the transmitted data into data frames, respectively sending the data frames into different channels, respectively carrying out data processing and digital-to-analog conversion on the data frames under the different channels, generating analog signals, and coupling the analog signals into a single twisted pair for transmission; the receiver is used for receiving analog signals in the single twisted pair, performing analog-to-digital conversion on the analog signals to obtain OFDM digital signals, performing synchronization and channel estimation and equalization processing on the OFDM digital signals under different channels to obtain signals before decoding, and performing data processing on the signals before decoding to obtain correct data; and correct data under different channels are transmitted to the Ethernet. According to the invention, the transmission bandwidth and the transmission distance of the system can be improved, and the real-time performance and the certainty of Ethernet data transmission are ensured.

Description

technical field [0001] The invention relates to the technical field of signal transmission, in particular to a single-pair twisted-pair Ethernet transmission system and method based on OFDM modulation. Background technique [0002] As an efficient local area network, industrial Ethernet is a key part of the modern industrial automation system and the basis for the construction of intelligent factories. Because the two-wire Ethernet uses a single twisted pair to transmit data and power supply, it can reduce the hardware cost of the network system and increase the wiring capacity per unit volume, which is the development trend of industrial Ethernet. At present, there are problems such as insufficient standards, lack of dedicated chips, and few industrial application scenarios. [0003] For the field of industrial communication, real-time and deterministic are the direction of development, and high bandwidth and long-distance transmission are also application requirements. A...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/00H04L27/26
CPCH04L27/0006H04L27/2601
Inventor 严伟吴鹏飞王博王雪迪时广轶
Owner PEKING UNIV
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