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Enhanced Detection of Weak GNSS Signals Using Spatial Combining

机译：使用空间组合增强对弱GNSS信号的检测

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摘要

Detection of global navigation satellite systems (GNSS) signals is limited in indoor environments due to signal attenuation and multipath fading. Longer signal integration intervals are traditionally used to overcome fading losses. Another possibility, explored herein, is to use spatial combining of multiple antenna elements to provide both array and diversity gain. Physical constraints of handheld device implementation limit the practical number of antennas to two. Consequently in this paper, the diversity gain achievable through spatial combining of a pair of antennas is considered from a theoretical perspective, demonstrating gains in excess of 6 dB for typical cases. Experimental verification of the theoretical predictions of the processing gain is provided based on a two-element antenna configuration. Indoor GPS signal measurements were made to determine the statistics of the diversity gain of the two-antenna system relative to the equivalent single antenna system. These measurements corroborate the relative diversity gains determined theoretically.
机译：由于信号衰减和多径衰落，在室内环境中，全球导航卫星系统（GNSS）信号的检测受到限制。传统上，较长的信号积分间隔用于克服衰落损耗。本文探讨的另一种可能性是使用多个天线元件的空间组合来提供阵列增益和分集增益。手持设备实施的物理限制将天线的实际数量限制为两个。因此，在本文中，从理论的角度考虑了通过一对天线的空间组合可获得的分集增益，在典型情况下，其增益超过6 dB。基于两元素天线配置，对处理增益的理论预测进行了实验验证。进行室内GPS信号测量以确定相对于等效单天线系统的两天线系统分集增益的统计量。这些测量结果证实了理论上确定的相对分集增益。

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  • 来源
    《Navigation》 |2009年第2期|83-95|共13页
  • 作者

    JOHN NIELSEN; SURENDRAN K. SHANMUGAM; M. UPAL MAHFUZ; GERARD LACHAPELLE;

  • 作者单位

    University of Calgary, Calgary, Alberta, Canada T2N 1N4;

    University of Calgary, Calgary, Alberta, Canada T2N 1N4;

    University of Calgary, Calgary, Alberta, Canada T2N 1N4;

    University of Calgary, Calgary, Alberta, Canada T2N 1N4;

  • 收录信息 美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
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