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首页> 外文学位 >Design, development, and evaluation of a system for angle -of -arrival measurement at a UHF mobile radio base station.
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Design, development, and evaluation of a system for angle -of -arrival measurement at a UHF mobile radio base station.

机译：UHF移动无线电基站的到达角测量系统的设计，开发和评估。

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摘要

A system for angle-of-arrival (AOA) measurement at a UHF mobile radio base station is described. A seven-element "Y"-shaped array of monopoles above a ground plane is used to observe the signal from a hand-held radio transmitting at 460 MHz as the user moves through a variety of terrain conditions. A novel low-cost digitizing array receiver is used to capture the signal. Array calibration is achieved by fitting a physical model of the open-circuit impedance matrix to a small number of previous AOA measurements for known transmitter locations. The calibrated data is then analyzed using conventional AOA estimators assuming discrete AOAs. The quality of the estimate is assessed using a simple "residual power" metric which provides an indication of how well the estimate describes the data obtained from the array. The system was evaluated in both line-of-sight (LOS) and non-LOS cases. It is shown that transmitter localization to within a few degrees is usually possible. In certain cases, a higher-order estimate is used to identify significant multipaths. A few examples of complex terrain scattering are also observed, including evidence of multipath reflections from buildings. In general, this multipath is found to be weak relative to the primary path. The results also suggest that angle spread was less than 5° in LOS cases, and less than 20° in non-LOS cases, which is consistent with the findings of other field studies.
机译：描述了一种用于UHF移动无线电基站处的到达角（AOA）测量的系统。当用户在各种地形条件下移动时，在地平面上方的单极子的七元素“ Y”形阵列用于观察来自以460 MHz发射的手持无线电的信号。一种新颖的低成本数字化阵列接收器用于捕获信号。通过将开路阻抗矩阵的物理模型拟合到已知发射机位置的少量先前AOA测量中，可以实现阵列校准。然后使用假定离散AOA的常规AOA估计器分析校准后的数据。使用简单的“剩余功率”度量来评估估计的质量，该度量提供了估计如何很好地描述了从阵列获得的数据的指示。在视距（LOS）和非LOS情况下都对系统进行了评估。结果表明，通常可以将发射机定位在几度以内。在某些情况下，高阶估计用于标识重要的多径。还观察到了一些复杂的地形散射的例子，包括建筑物多径反射的证据。通常，发现此多路径相对于主路径较弱。结果还表明，在LOS病例中角展度小于5°，在非LOS病例中角展度小于20°，这与其他现场研究的结果一致。

著录项

  • 作者

    Ellingson, Steven William.;

  • 作者单位

    The Ohio State University.;

  • 授予单位 The Ohio State University.;
  • 学科 Engineering Electronics and Electrical.
  • 学位 Ph.D.
  • 年度 2000
  • 页码 175 p.
  • 总页数 175
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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