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Detection and Minimisation of Sky-wave Interference in Loran-C Receivers

机译：Loran-C接收机中天波干扰的检测和最小化

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摘要

Sky-wave interference commonly affects Loran-C receivers' performance. The sky-wavernrejection methods employed in current designs of receivers are not optimal because they usernfixed, worst-case, sample timing. This paper reports on novel signal processing techniquesrnfor measuring in real time the delay and strength of the sky-wave components of a Loran-Crnsignal relative to the ground-wave pulse. Their merits and limitations will be discussed. Therneffectiveness of these techniques will be assessed by theoretical analysis, computer simulationrnunder a range of realistic conditions, and finally, by the use of real-time off-air signals in arnprototype receiver. This work establishes a basis on which to design a Loran-C receiverrncapable of adjusting its sampling point adaptively to the optimal value in a constantlychangingrnsky-wave environment. Such receivers promise to improve significantly thernaccuracy and reliability of positioning under adverse operational conditions.
机译：天波干扰通常会影响Loran-C接收机的性能。当前接收机设计中采用的天波抑制方法不是最佳的，因为它们是用户固定的，最坏的情况下的采样定时。本文报道了用于实时测量Loran-Crnsignal的天波分量相对于地波脉冲的延迟和强度的新型信号处理技术。将讨论它们的优缺点。这些技术的有效性将通过理论分析，在一系列实际条件下的计算机仿真以及最终在arnprototype接收机中使用实时广播信号来评估。这项工作为设计Loran-C接收机奠定了基础，该接收机能够在不断变化的天波环境中自适应地将其采样点调整为最佳值。这样的接收器有望在不利的工作条件下显着提高定位的准确性和可靠性。

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  • 来源
  • 会议地点 London(GB);London(GB);London(GB)
  • 作者

    Abbas Mohammed; David Last;

  • 作者单位

    Department of Telecommunications and Signal Processing,University of Karlskrona/Rormeby, 372 25 Ronneby, Sweden.Mohammed@its.hk-r.se;

    School of Electronic Engineering and Computer Systems,University of Wales, Dean Street, Bangor, LL57 1UT, UK.;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 无线电导航;
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