• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议> >D2D discovery approach based on spreading technique for public safety
【24h】

D2D discovery approach based on spreading technique for public safety

机译：基于扩展技术的公共安全D2D发现方法

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

Geological processes such tornados, avalanches or earthquakes can unleash adverse effects especially life losses, when we miss detect the presence of victims in devastated area. Statistics prove that death toll caused by natural hazards is becoming more prevalent from year to another. Meanwhile, telecommunications are booming with arising broadband networks. Besides, new wireless applications lead to the necessity of emerging a new communication fashion, especially in sensitive situation like public safety. Device to Device (D2D) communication, is one of promising alternative to circumvent public safety and to enhance emergency communications capabilities. The non assisted peer discovery concept over LTE raises some significant challenges so that in this paper, we propose a new approach that relies on spreading technique using orthogonal codes. Every victim signal will be spreaded by a code drawn from an orthogonal matrix called Hadamard matrix. Doing so, we improve the probability of successful detection of victims while keeping very low the probability of False Alarm thanks to the strengthening of signal by the spread process. The reliability of our proposal scheme is underlying by numerical simulations. Detection decision considers a correlation coefficient between the amount of received signal and the expected one spreaded to every orthogonal code. The coefficient is compared to a threshold in order to conclude a peer presence.
机译：当我们错过在受灾地区发现受害者的存在时，龙卷风，雪崩或地震等地质过程可能会带来不利影响，尤其是生命损失。统计数字证明，自然灾害造成的死亡人数在一年之中越来越普遍。同时，随着宽带网络的兴起，电信业也蓬勃发展。此外，新的无线应用导致出现一种新的通信方式的必要性，特别是在诸如公共安全之类的敏感情况下。设备到设备（D2D）通信，是规避公共安全并增强紧急通信功能的有希望的替代方法之一。 LTE上的非辅助对等点发现概念提出了一些重大挑战，因此在本文中，我们提出了一种新方法，该方法依赖于使用正交码的扩频技术。每个受害信号将通过从称为Hadamard矩阵的正交矩阵提取的代码进行扩展。这样做，由于传播过程增强了信号，因此我们提高了成功检测受害者的可能性，同时将误报的可能性保持在非常低的水平。我们的建议方案的可靠性取决于数值模拟。检测决策考虑接收信号量与扩展到每个正交码的预期信号之间的相关系数。将该系数与阈值进行比较，以得出对等存在。

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