• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>IEEE Transactions on Vehicular Technology >Wide-band measurements and characterization at 2.1 GHz while entering in a small tunnel
【24h】

Wide-band measurements and characterization at 2.1 GHz while entering in a small tunnel

机译：进入小隧道时以2.1 GHz进行宽带测量和表征

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The wide-band complex transfer function and propagation characteristics in a small passageway tunnel for nonline-of-sight are studied in this paper. A two-dimensional wide-band model based on the uniform theory of diffraction (UTD) and geometric optics (GO) is implemented and a network analyzer is used to perform measurements. In order to obtain the power delay profile, a correction factor is used, which adjusts the deviation caused by the windowing and zero padding performed in frequency domain. The UTD model predicts quite well the averaged path loss, power delay profile, root-mean-square (rms) delay spread and coherence bandwidth, even when the curved tunnel is approximated to two straight lines. Furthermore, it is shown that the position of the transmitter is crucial in the performance of the system: the path loss slope and rms delay spread are increased when the inclination of the transmitter is increased. In all cases, the rms delay spread is lower than 40 ns, where the coherence bandwidth decreases to 20 MHz. This parameter is proposed to estimate the excitation zone inside a tunnel.
机译：本文研究了非视线小通道隧道的宽带复传递函数和传播特性。实现了基于衍射（UTD）和几何光学（GO）统一理论的二维宽带模型，并使用网络分析仪进行测量。为了获得功率延迟曲线，使用校正因子，该校正因子调整由频域中的加窗和零填充引起的偏差。 UTD模型可以很好地预测平均路径损耗，功率延迟曲线，均方根（rms）延迟扩展和相干带宽，即使弯曲隧道近似于两条直线也是如此。此外，还显示了发射机的位置对于系统的性能至关重要：当发射机的倾斜度增加时，路径损耗斜率和均方根延迟扩展也会增加。在所有情况下，均方根延迟扩展均低于40 ns，其中相干带宽降至20 MHz。建议使用此参数来估算隧道内的激发区。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号