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相关概念视频

Field Application of Global Positioning System01:28

Field Application of Global Positioning System

45
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...
45
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
Introduction to Global Positioning System01:30

Introduction to Global Positioning System

59
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,...
59
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

30
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...
30
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

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实现一个高灵敏度的全球导航卫星系统接收器在一个系统上芯片的现场可编程门阵列平台上.

Marc Majoral1, Javier Arribas1, Carles Fernández-Prades1

  • 1Centre Tecnològic de Telecomunicacions de Catalunya (CTTC/CERCA), Parc Mediterrani de la Tecnologia, Building B4, Av. Carl Friedrich Gauss 7, 08860 Castelldefels, Spain.

Sensors (Basel, Switzerland)
|March 13, 2024
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概括

这项研究介绍了一种负担得起的,高灵敏度的全球导航卫星系统 (GNSS) 接收器,能够跟踪弱的利略信号. 新的System-on-Chip Field-Programmable Gate Array设计能够在具有挑战性的低信号对噪声环境中提供强大的性能.

关键词:
在FPGA中,FPGA是指FPGA.在GNSS中使用GNSS.这就是 SoC-FPGA.高灵敏度的GNSS接收器软件定义无线电 软件定义无线电在芯片上的系统.

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科学领域:

  • 电气工程 电气工程
  • 卫星导航系统 卫星导航系统
  • 信号处理 信号处理

背景情况:

  • 传统的全球导航卫星系统 (GNSS) 接收器在信号采集方面很弱,特别是在具有高信号衰减的具有挑战性的环境中.
  • 在GNSS信号处理算法的进步对于提高接收器性能和扩大应用领域至关重要.
  • 软件定义无线电 (SDR) 概念与硬件加速的整合为开发更高效,更适应性的GNSS接收器提供了有希望的途径.

研究的目的:

  • 设计和实施一个实惠的,实时的高灵敏度 (HS) GNSS接收器.
  • 特别是为了能够捕获和跟踪微弱的利略E1b/c信号.
  • 为在低信号对噪声环境中研究先进的GNSS信号处理算法提供一个平台.

主要方法:

  • 使用了系统在芯片上的可编程门阵列 (SoC-FPGA) 技术,将SDR灵活性与FPGA硬件处理合并.
  • 在SoC-FPGA架构内开发了一个模块化的GNSS基带处理引擎.
  • 在各种信号强度条件下,用实时利略信号测试了接收器.

主要成果:

  • 证明了接收器能够获取和跟踪微弱的利略E1b/c信号的能力.
  • 取得成功的导航解决方案,即使在载波与噪声密度比率 (C/N0) 低至20dB-Hz.
  • 与传统的基于处理器的设计相比,展示了增强的功率效率.

结论:

  • 开发的HS GNSS接收器是一个可行的,低成本的解决方案,用于研究先进的信号处理.
  • SoC-FPGA架构为嵌入式软件定义接收器提供了一种节能且可适应的平台.
  • 这项工作有助于在具有挑战性的环境中开发,测试和验证实验性GNSS信号处理技术.