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相关概念视频

Transmission Line Design Considerations01:23

Transmission Line Design Considerations

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Aluminum has become the material of choice for overhead transmission lines, surpassing copper due to its abundance and cost-effectiveness. The most prevalent type is the aluminum conductor, steel-reinforced (ACSR), which combines aluminum strands around a steel core. Other variants include all-aluminum conductors (AAC), all-aluminum alloy conductors (AAAC), aluminum conductor alloy-reinforced (ACAR), and aluminum-clad steel conductors. Advanced designs, such as aluminum conductors with steel...
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Propagation Speed of Electromagnetic Waves01:30

Propagation Speed of Electromagnetic Waves

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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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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...
239
Carrier Generation and Recombination01:22

Carrier Generation and Recombination

548
Carrier generation is the process by which electron-hole pairs (EHPs) are created within the semiconductor. In direct-bandgap semiconductors, such as gallium arsenide (GaAs), this occurs efficiently when energy absorption prompts valence electrons to leap into the conduction band, leaving behind holes.
This process is given by the generation rate G and is efficient due to the conservation of momentum between the valence band maximum and conduction band minimum.
Indirect generation involves an...
548
Design Example01:23

Design Example

321
The innovation of touch-tone telephony revolutionized the telecommunications industry by replacing the traditional rotary dial with a dual-tone multi-frequency (DTMF) signaling system. This system uses a matrix-style keypad with buttons arranged in four rows and three columns, creating 12 distinct signals each assigned to a pair of frequencies. Each button press results in a simultaneous generation of two sinusoidal tones – one from a low-frequency group (697 to 941 Hz) and one from a...
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Design Example: Capacitance Multiplier Circuit01:20

Design Example: Capacitance Multiplier Circuit

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In integrated circuit technology, a capacitance multiplier is often utilized to produce a larger capacitance value when a small physical capacitance falls short. This is achieved by a circuit that multiplies capacitance values by a factor of up to 1000, such that a 10-pF capacitor can replicate the performance of a 100-nF capacitor.
The circuit illustrated in Figure 1 below incorporates two op-amps, with the first operating as a voltage follower and the second acting as an inverting amplifier.
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相关实验视频

Updated: Jun 14, 2025

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
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预编码器设计用于网络大规模MIMO光学无线通信.

Zakir Ali1,2, Chen Sun1,3, Qasim Jan4

  • 1National Mobile Communications Research Laboratory, Southeast University, Nanjing 210096, China.

Sensors (Basel, Switzerland)
|August 29, 2024
PubMed
概括
此摘要是机器生成的。

本研究介绍了用于网络大规模MIMO OWC系统的新型前编码设计,以提高传输速率. 拟议的方法有效地最大化了总比率,提高了光学无线通信的整体系统性能.

关键词:
这是OWC的OWC.网络大规模的MIMO.优化的优化优化优化.预编码器设计设计汇总利率 汇总利率是什么

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相关实验视频

Last Updated: Jun 14, 2025

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09:43

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Quasi-light Storage for Optical Data Packets
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科学领域:

  • 电气工程 电气工程
  • 光学无线通信的无线通信
  • 无线通信系统无线通信系统

背景情况:

  • 预编码可以提高大规模MIMO和OWC系统的传输速率.
  • 网络大规模的MIMO OWC (NM-MIMO-OWC) 系统需要优化前编码器设计以提高性能.
  • 目前的系统面临着在功率限制下最大限度地提高总比率的挑战.

研究的目的:

  • 为NM-MIMO-OWC系统设计一个前编码器,以提高总和速率和系统性能.
  • 开发一个框架来计算NM-MIMO-OWC系统中可实现的总和率.
  • 为了解决在总功率约束下最大化总量速率的优化问题.

主要方法:

  • 网络的大规模MIMO OWC框架的开发.
  • 使用框架计算可实现的总额利率.
  • 应用Karush-Kuhn-Tucker (KKT) 条件来获得最佳的溶液特性.
  • 针对高效预编码的低复杂度算法的建议.

主要成果:

  • 使用KKT条件,获得了最佳前编码器解决方案的必要条件.
  • 提出了一个低复杂度的算法来提高预编码效率.
  • 数字结果证实了传输率的显著改善.
  • 拟议的前编码器设计有效地最大化了总率.

结论:

  • 拟议的前编码器设计显著提高了NM-MIMO-OWC系统的传输速率.
  • 该方法有效地最大化了总比率,同时遵守功率限制.
  • 开发的框架和算法为NM-MIMO-OWC预编码提供了一个有效的方法.