• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>電子情報通信学会技術研究報告 >Simulations for effects on other communication antennas by scatterd waves from a ship body for maritime satellite communications
【24h】

Simulations for effects on other communication antennas by scatterd waves from a ship body for maritime satellite communications

机译：模拟来自船体的散射波对其他通信天线的影响，用于海上卫星通信

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

In maritime mobile satellite communications, receiving satellite signal level varies due to direction and motion of a ship. To compensate fluctuation of antenna directions, a satellite following system is used for a parabolic antenna on a ship. When a structure of the ship crosses the line between the antenna and the communicating satel lite, the antenna stops transmitting for the satellite. Directivity of a parabolic antenna has certain spread. Thus it is needed to make some clearance between structures of the ship and antenna beam. It is important to estimate how structures of a ship affect on restriction of antenna direction and how much clearance actually needed for such situations. However, precise clearances between antenna beam and structures of a ship are not yet studied. In this report, the following two things are considered. Firstly when the beam of the transmitting antenna is towards a satellite, received levels by other antennas on the ship are calculated by numerical simulation. Secondary, received levels by other satellites are estimated by calculating a diffracted wave from square pillar which simulates a structure of a ship.
机译：在海上移动卫星通信中，接收卫星信号电平会因船舶的方向和运动而变化。为了补偿天线方向的波动，卫星跟踪系统用于船上的抛物面天线。当船舶的结构越过天线和通信卫星之间的线时，天线停止向卫星发射信号。抛物线天线的方向性有一定的扩展。因此，需要在船的结构和天线波束之间留出一定的间隙。重要的是估计船舶的结构如何影响天线方向的限制以及在这种情况下实际需要多少距离。但是，尚未研究天线波束与船舶结构之间的精确间隙。在此报告中，考虑了以下两件事。首先，当发射天线的波束朝向卫星时，通过数值模拟计算船上其他天线的接收电平。通过计算来自模拟船舶结构的方柱的衍射波，可以估算其他卫星接收到的次要水平。

著录项

  • 来源
    《電子情報通信学会技術研究報告》 |2012年第255期|37-42|共6页
  • 作者

    Takahiro AOYAGI; Kouhei SUZAKI; Yoshinori SUZUKI; Takashi HIROSE; Takatoshi SUGIYAMA;

  • 作者单位

    Graduate School of Decision Science and Technology, Tokyo Institute of Technology O-okayama 2-12-1-W9-110, Meguro-ku, Tokyo, 152-8552 Japan;

    NTT Access Network Service Systems Laboratories, NTT Corporation Hikarinooka 1-1, Yokosuka, Kanagawa, 239-0847 Japan;

    NTT Access Network Service Systems Laboratories, NTT Corporation Hikarinooka 1-1, Yokosuka, Kanagawa, 239-0847 Japan;

    NTT Access Network Service Systems Laboratories, NTT Corporation Hikarinooka 1-1, Yokosuka, Kanagawa, 239-0847 Japan;

    NTT Access Network Service Systems Laboratories, NTT Corporation Hikarinooka 1-1, Yokosuka, Kanagawa, 239-0847 Japan;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Satellite communications; maritime; interference; diffraction; signal level;

    机译：卫星通信;海上;干扰;衍射;信号电平;

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