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相关概念视频

Introduction to Global Positioning System01:30

Introduction to Global Positioning System

61
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,...
61
Errors in Global Positioning System01:26

Errors in Global Positioning System

46
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,...
46
Field Application of Global Positioning System01:28

Field Application of Global Positioning System

46
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...
46
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

35
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...
35
Types of Global Positioning System Surveys01:30

Types of Global Positioning System Surveys

58
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...
58
GIS Software, Hardware, and Sources of GIS Data01:23

GIS Software, Hardware, and Sources of GIS Data

65
A Geographic Information System (GIS) combines specialized software and hardware to effectively manage, analyze, and present spatial and related data. GIS software includes critical functionalities such as a user interface for easy navigation, database management tools for handling spatial and attribute data, and data retrieval features for efficient access. Analytical tools transform raw data into insights, while display functions produce maps and reports in various formats for effective...
65

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Continuous-Wave Propagation Channel-Sounding Measurement System - Testing, Verification, and Measurements
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硬 SyDR:全球导航卫星系统算法的基准测试环境.

Antoine Grenier1, Jie Lei2, Hans Jakob Damsgaard1

  • 1Electrical Engineering Unit, Tampere University, 33720 Tampere, Finland.

Sensors (Basel, Switzerland)
|January 23, 2024
PubMed
概括

本研究介绍了Hard SyDR,这是开源GNSS软件定义无线电 (SDR) 的演变,以克服仅软件系统的局限性. 它可以在硬件层面进行分析,以优化全球导航卫星系统 (GNSS) 接收器,并探索近似计算 (AxC) 技术.

关键词:
基准测试 (benchmarking) 是一种比较的方法.计算复杂性 计算复杂性现场可编程门阵列 (FPGA)全球导航卫星系统 (GNSS) 是一个全球导航卫星系统.开源软件是开源软件.

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科学领域:

  • 电气工程 电气工程
  • 计算机工程 计算机工程
  • 卫星导航系统 卫星导航系统

背景情况:

  • 全球导航卫星系统 (GNSS) 对于定位和定时至关重要,它依赖于特定应用的集成电路 (ASIC).
  • 目前的GNSS ASIC缺乏透明度,阻碍了全球导航卫星系统 (GNSS) 处理链的研究,修改和优化.
  • 只有软件的全球导航卫星系统 (GNSS) 环境在分析硬件级性能指标方面存在局限性.

研究的目的:

  • 审查全球导航卫星系统 (GNSS) 处理链并确定仅在软件环境中的局限性.
  • 提出Hard SyDR,一种用于硬件级全球导航卫星系统 (GNSS) 分析的增强系统.
  • 探索对未来低功耗全球导航卫星系统 (GNSS) 接收器的近似计算 (AxC) 技术的应用.

主要方法:

  • 利用SyDR,一个开源的全球导航卫星系统 (GNSS) 软件定义无线电 (SDR),用于算法基准测试.
  • 开发了硬件SyDR,集成高层合成 (HLS) 和PYNQ平台用于硬件加速和分析.
  • 在开发过程中评估了高水平合成 (HLS) 和PYNQ平台的优势和局限性.

主要成果:

  • 强调纯粹基于软件的全球导航卫星系统 (GNSS) 处理的限制.
  • 证明了Hard SyDR的可行性,以访问硬件级别的关键性能指标 (KPIs),如功率和能源消耗.
  • 为全球导航卫星系统 (GNSS) 研究提供了高水平合成 (HLS) 和PYNQ平台集成的概述.

结论:

  • 硬式SyDR提供了一种途径,可以克服商业全球导航卫星系统 (GNSS) ASIC 的透明度限制.
  • 该系统有助于探索先进的技术,如近似计算 (AxC),用于改进全球导航卫星系统 (GNSS) 接收器设计.
  • 这项工作为开发更高效和可定制的低功耗全球导航卫星系统 (GNSS) 接收器奠定了基础.