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相关概念视频

Maximum Power Transfer01:16

Maximum Power Transfer

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Numerous practical applications within engineering disciplines, such as telecommunications, necessitate optimizing power delivery to a connected load. This pursuit, however, entails inherent internal losses, which can either equal or exceed the power supplied to the load. The Thevenin equivalent circuit is helpful in finding the maximum power a linear circuit can deliver to a load. It is assumed in this context that the load resistance can be adjusted.
By substituting the entire circuit with...
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Receiver Operating Characteristic Plot01:15

Receiver Operating Characteristic Plot

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A ROC (Receiver Operating Characteristic) plot is a graphical tool used to assess the performance of a binary classification model by illustrating the trade-off between sensitivity (true positive rate) and specificity (false positive rate). By plotting sensitivity against 1 - specificity across various threshold settings, the ROC curve shows how well the model distinguishes between classes, with a curve closer to the top-left corner indicating a more accurate model. The area under the ROC curve...
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Frequency-Domain Interpretation of PD Control01:24

Frequency-Domain Interpretation of PD Control

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Proportional-Derivative (PD) controllers are widely used in fan control systems to improve stability and performance. A fan control system can be effectively represented using a Bode plot to illustrate the impact of a PD controller through its transfer function. The Bode plot visually conveys how PD control modifies the fan's response across various frequencies, providing a frequency domain interpretation of the controller's behavior.
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Operon Model01:23

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The operon model represents a fundamental mechanism of gene regulation in prokaryotes, enabling coordinated expression of genes involved in related metabolic or functional pathways. Operons consist of structural genes, a promoter, and an operator, with transcription regulated by repressors, activators, and small effector molecules.Structure and Function of OperonsAn operon is a cluster of structural genes transcribed together under the control of a single promoter. The promoter region...
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Characteristics of OpAmp01:17

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The operational amplifier, commonly known as an op-amp, is a specially designed electronic circuit component. Its purpose is to work in conjunction with other circuit elements to execute a defined signal-processing operation. Consider an equivalent circuit model of an op-amp, as depicted in Figure 1; the output section comprises a voltage-controlled source in parallel with the output resistance Ro.
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Electromagnetic waves are consistent with Ampere's law. Assuming there is no conduction current Ampere's law is given as:
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相关实验视频

Updated: Jan 13, 2026

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
09:43

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一个适应速率的MAC协议,用于灵活的OFDM-PON.

Zhe Zheng1, Yingying Chi1, Xin Wang2

  • 1Beijing Smartchip Microelectronics Technology Company Ltd., Beijing 100192, China.

Sensors (Basel, Switzerland)
|January 10, 2026
PubMed
概括

本研究介绍了一种用于正角频率分割多重复合被动光学网络 (OFDM-PONs) 的新型中等接入网络 (MAC) 协议. 该协议允许灵活,适应速率的数据传输,克服部署的挑战.

关键词:
这是MAC协议,MAC协议是MAC协议.在OFDM-PON中.适应性调整率 - 适应性调整率

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科学领域:

  • 光学通信是指光学通信.
  • 网络协议 网络协议
  • 电信工程 电信工程 电信工程

背景情况:

  • 正角频率分割复杂化被动光学网络 (OFDM-PON) 提供高光谱效率,但面临着部署的挑战.
  • 现有的中型接入网络 (MAC) 协议不能充分支持OFDM-PON的灵活,取决于距离的数据速率.

研究的目的:

  • 为OFDM-PON系统提出和验证一种基于时间分割多重复合 (TDM) 的新型速率适应性MAC协议.
  • 为满足在多光网络单元 (multi-ONU) 环境中对异质数据速率的高效管理需求.

主要方法:

  • 设计一个三层标题框架结构,用于多ONU数据调度,具有异质的速率配置文件.
  • 在光学网络单元 (ONU) 激活期间实施独特的通道探测机制,用于动态速率的确定.
  • 在Xilinx VCU118 FPGA上硬件实现光线终端 (OLT) MAC协议,具有自定义环缓冲池.

主要成果:

  • 在OFDM-PON系统中展示了强大的上游和下游数据传输.
  • 在下行链路上实现了灵活的净数据速率切换,从8.1 Gbit/s到32.8 Gbit/s.
  • 验证了多个ONU数据的高效管理,具有异质的速率配置文件.

结论:

  • 拟议的基于TDM的MAC协议有效支持在OFDM-PON中灵活,适应速率的数据传输.
  • 新型头部结构和通道探测机制增强了多ONU数据调度和动态速率调整.
  • 成功的硬件实现证实了该协议对于OFDM-PON部署的实用性.