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相关概念视频

Types of Global Positioning System Surveys01:30

Types of Global Positioning System Surveys

55
GPS surveying methods vary in application, accuracy, and data collection techniques, catering to diverse surveying and mapping needs. Static GPS, kinematic GPS, and real-time kinematic (RTK) surveying are widely used. Each technique offers distinct advantages.Static GPS involves placing one receiver at a known reference point and another at the target point. It collects exact positional data by observing multiple satellite ranges over an extended period, achieving centimeter-level accuracy for...
55
Design Example: Identifying the Locations of Monuments in the Field Using Global Positioning System Device01:30

Design Example: Identifying the Locations of Monuments in the Field Using Global Positioning System Device

27
Surveyors use Global Positioning System (GPS) technology to measure the precise location and elevation of points on Earth. In a recent survey, GPS receivers were used to determine the coordinates and elevations of two park monuments. The process involved careful mission planning, data collection, and correction to ensure accuracy. The survey began with mission planning to identify optimal satellite visibility and minimize Position Dilution of Precision (PDOP). A geodetic control point...
27
Field Application of Global Positioning System01:28

Field Application of Global Positioning System

43
The Global Positioning System (GPS) has become an indispensable tool in fieldwork, offering unparalleled precision and efficiency for surveying, navigation, and infrastructure development. By harnessing signals from a constellation of satellites, GPS receivers determine the location of objects with remarkable speed and accuracy, often completing calculations within a second.Advantages of Modern GPS TechnologyContemporary GPS receivers are designed to meet the practical demands of field...
43
Introduction to Global Positioning System01:30

Introduction to Global Positioning System

56
The Global Positioning System (GPS) revolutionized positioning on Earth, providing precise location data through satellite ranging. The GPS system was developed in 1978 by the U.S. Department of Defense  for military use, and it became available for civilian applications in 1983, transforming fields including navigation, fleet management, and time synchronization for telecommunications systems.GPS consists of satellites in medium Earth orbit, about 20,200 kilometers above the surface,...
56
Errors in Global Positioning System01:26

Errors in Global Positioning System

44
Global Positioning System (GPS) technology has revolutionized navigation and positioning, but its accuracy is often compromised by various errors. These errors, stemming from environmental, satellite, and receiver-related factors, require careful mitigation to ensure reliable performance across applications.Atmospheric ErrorsGPS signals travel through the Earth’s ionosphere and troposphere, introducing delays which affect accuracy. The ionosphere is strongly influenced by charged particles,...
44
Electronic Distance Measuring Instruments01:30

Electronic Distance Measuring Instruments

35
Electronic Distance Measuring Instruments (EDMs) are essential tools in modern surveying, offering precise distance measurements by emitting electromagnetic signals and calculating the time required for these signals to travel to a target and return. Two primary types of signals are used in EDMs — light waves and microwaves — each suited to specific environmental and distance requirements. Light-wave-based EDMs utilize either infrared or laser light, providing high accuracy over short...
35

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基于SDR的无人机定位系统的实验评估.

Cristian Codău1, Rareș-Călin Buta1, Andra Păstrăv1

  • 1Communications Department, Technical University of Cluj-Napoca, 28 Memorandumului Street, 400114 Cluj-Napoca, Romania.

Sensors (Basel, Switzerland)
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PubMed
概括

这项研究在软件定义无线电 (SDR) 系统上实现了MUSIC算法,用于无人机本地化. 该系统准确地确定无人机信号的到达角度 (AoA),这对于跟踪和控制至关重要.

关键词:
音乐算法 音乐算法特别提款权 (SDR) 是一种特别提款权.无人机通信 无人机通信在到达的角度到达的角度.寻找方向的方向探测器在本地化,本地化.信号处理 信号处理 信号处理统一的圆形阵列是一个统一的圆形阵列.

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科学领域:

  • 电气工程 电气工程
  • 信号处理 信号处理
  • 航空航天工程 航空航天工程

背景情况:

  • 无人驾驶飞行器 (UAV),特别是无人机的普及,导致人们对非法活动的担忧增加.
  • 无人机的有效定位和跟踪对于安全和控制至关重要.
  • 基于射频 (RF) 的定位技术,特别是次空间算法,为确定信号源位置提供了高精度.

研究的目的:

  • 在软件定义无线电 (SDR) 平台上实现和实验评估MUSIC算法,用于无人机本地化.
  • 评估系统在户外环境中确定目标无人机信号的到达角 (AoA) 的能力.

主要方法:

  • 在SDR系统上使用统一的圆形天线阵列实现MUSIC算法.
  • 在户外环境中进行实验部署,以捕获现实世界的无人机通信信号.
  • 获得的AoA结果与无人机应用日志文件和专业定向解决方案 (Narda SignalShark) 的比较.

主要成果:

  • 实施的基于SDR的系统成功地表示了目标无人机信号的到达角 (AoA).
  • 实验结果证明了该系统在实际户外环境中的能力.
  • 与专业设备的验证证实了MUSIC算法的本地化性能的准确性.

结论:

  • 在一个具有统一圆形天线阵列的SDR平台上实施的MUSIC算法是无人机定位的可行和准确方法.
  • 该系统确定AoA的能力对于开发有效的无人机检测和跟踪系统至关重要.
  • 进一步的研究可以探索先进的算法和数组配置,以增强无人机监控能力.