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A Design Method for Wired Signal Transmission Based on Orthogonal Frequency Division Multiplexing

A technology of wired signal and design method, applied in distribution line transmission system, transmission system, digital transmission system, etc., can solve the problem of low data transmission rate restricting system performance improvement, and achieve the effect of improving reliability

Active Publication Date: 2021-10-22
XIAN MICROELECTRONICS TECH INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, 1553B bus, CAN and RS-422 / RS485 bus still play an important role in fire control, power and information systems, but the low data transmission rate of CAN, RS485 and 1553B bus has become a constraint to the improvement of system performance. bottleneck

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  • A Design Method for Wired Signal Transmission Based on Orthogonal Frequency Division Multiplexing

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Embodiment Construction

[0064] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. The described embodiments are only part of the embodiments of the present application, not all of them. All other embodiments obtained by persons of ordinary skill in the art without creative efforts belong to the protection scope of the present application.

[0065] The present invention models transmission channels, transmission cables, transformers and other related components according to the differences in signal cable transmission media and transmission modes, and analyzes the impedance and attenuation characteristics of wired transmission media to calculate the maximum attenuation of the channel; based on the extracted Physical layer parameters and data processing requirements, determine design parameters such as available bandwidth, modulation mode, OFDM symbol length, ...

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Abstract

A design method for wired signal transmission based on OFDM, including modeling, analysis, measurement and parameter calculation of relevant components, determining design parameters based on the extracted related parameters and data processing requirements, and determining the design parameters based on the overall bit error rate of the system Determine the signal-to-noise ratio and transmit power according to the indicators and the noise characteristics of the application environment, decompose the system indicators and realize the design, and ensure the reliability of the design through co-simulation verification. The present invention can be applied to different wired medium channels, can unify the physical layer implementation architecture of different protocol buses, can also be used to improve the physical layer transmission rate of low-speed buses, and realize reliable long-distance transmission; in addition, the software-hardware joint simulation verification platform Through simulation verification of system modeling, verification system architecture and design code, and index verification by building a physical prototype system, the reliability of the design is improved.

Description

technical field [0001] The invention belongs to the field of wired communication, and in particular relates to a design method for wired signal transmission based on orthogonal frequency division multiplexing. Background technique [0002] Orthogonal frequency division multiplexing (OFDM) technology originated in the 1970s. Its core technical idea is to divide a channel into several orthogonal sub-channels and convert high-speed data signals into multiple parallel sub-channels. The sub-data streams are then modulated onto each sub-channel for transmission. The advantage of OFDM technology is that the orthogonal signal can be separated by correlation receiving technology at the receiving end, and the mutual interference between sub-channels can be easily reduced; the signal bandwidth on each sub-channel is smaller than the correlation bandwidth of the channel. Therefore, fading can be regarded as flat fading, which reduces intersymbol interference; the bandwidth of each subc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B3/54H04L27/26
CPCH04B3/54H04L27/2602H04L27/2678
Inventor 黄剑雄王剑峰李海松吴龙胜
Owner XIAN MICROELECTRONICS TECH INST
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