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相关概念视频

Design Example: Resistive Touchscreen01:14

Design Example: Resistive Touchscreen

303
A device engineer plays a crucial role in designing user interfaces for mobile devices. One such interface is the resistive touchscreen, which fundamentally consists of two metallic layers: a flexible upper layer and a rigid lower layer, separated by a narrow gap. The high resistance between these two layers is a key characteristic of this design.
When a user touches the screen, the two layers make contact at a specific point known as the touchpoint. This contact reduces the resistance between...
303
Design Example01:23

Design Example

324
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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相关实验视频

Updated: Jun 23, 2025

Large Scale Energy Efficient Sensor Network Routing Using a Quantum Processor Unit
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Published on: September 8, 2023

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可重新配置的智能表面辅助D2D系统的定位性能分析和算法设计.

Mengke Wang1, Tiejun Lv1, Pingmu Huang2

  • 1School of Information and Communication Engineering, Beijing University of Posts and Telecommunications (BUPT), Beijing 100876, China.

Sensors (Basel, Switzerland)
|June 19, 2024
PubMed
概括
此摘要是机器生成的。

本研究介绍了一种使用可重新配置智能表面 (RIS) 的合作定位系统,用于在毫米波 (mmWave) 频段中高精度定位. 该系统在降低传输功率的情况下达到厘米级准确度,克服阻塞挑战.

关键词:
梁成形设计的设计设备对设备 (D2D) 的关系毫米波是一种毫米波.定位错误局限 定位错误局限可重新配置的智能表面.

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科学领域:

  • 无线通信无线通信
  • 局部化系统 局部化系统
  • 信号处理 信号处理

背景情况:

  • 在毫米波 (mmWave) 频段中高精度定位至关重要,但受到信号阻塞的挑战.
  • 现有的本地化方法在复杂环境中难以获得可靠性.
  • 设备对设备 (D2D) 通信为增强本地化提供了潜力.

研究的目的:

  • 为用户设备 (UE) 提出一个新的合作本地化系统,其辅助是可重新配置的智能表面 (RIS).
  • 为了应对在本地化任务中毫米波信号阻塞所带来的挑战.
  • 为了优化系统的厘米级定位精度和能源效率.

主要方法:

  • 开发一个合作本地化模型,将RIS集成为点和UE.
  • 导出定位误差限制 (PEB) 作为一个关键性能指标.
  • 设计UE-RIS通信的联合光束形成策略,以优化通道状态信息 (CSI) 并最大限度地减少PEB.

主要成果:

  • 拟议的RIS辅助合作本地化系统可以达到厘米级的精度.
  • 与RIS辅助的基站定位相比,该系统表现出卓越的性能.
  • 在保持高精度的同时,实现了10dBm的传输功率减少.

结论:

  • 拟议的UE-RIS合作本地化系统有效地克服了毫米波阻塞问题.
  • 联合束形设计显著提高了定位精度和效率.
  • 这种方法为未来高精度,全场景本地化提供了一个有希望的解决方案.