Multipath Effects in GPS Receivers: A Primer
Steven Miller, Xue Zhang, Andreas Spanias
- 出版商: Morgan & Claypool
- 出版日期: 2015-12-01
- 售價: $1,410
- 貴賓價: 9.5 折 $1,340
- 語言: 英文
- 頁數: 72
- 裝訂: Paperback
- ISBN: 1627059318
- ISBN-13: 9781627059312
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商品描述
Autonomous vehicles use global navigation satellite systems (GNSS) to provide a position within a few centimeters of truth. Centimeter positioning requires accurate measurement of each satellite's direct path propagation time. Multipath corrupts the propagation time estimate by creating a time-varying bias. A GNSS receiver model is developed and the effects of multipath are investigated. MATLABtm code is provided to enable readers to run simple GNSS receiver simulations. More specifically, GNSS signal models are presented and multipath mitigation techniques are described for various multipath conditions. Appendices are included in the booklet to derive some of the basics on early minus late code synchronization methods. Details on the numerically controlled oscillator and its properties are also given in the appendix.
商品描述(中文翻譯)
自駕車使用全球導航衛星系統(GNSS)來提供幾公分的精確定位。厘米級定位需要準確測量每顆衛星的直接傳播時間。多徑效應通過產生隨時間變化的偏差來破壞傳播時間的估計。本文開發了一個GNSS接收器模型,並研究了多徑效應的影響。提供了MATLABtm代碼,以便讀者能夠運行簡單的GNSS接收器模擬。更具體地說,本文介紹了GNSS信號模型,並描述了針對各種多徑條件的多徑緩解技術。手冊中還附錄了一些早期減去晚期代碼同步方法的基本推導。附錄中還提供了數位控制振盪器及其特性的詳細資訊。