...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>IEEE Communications Magazine >Unlicensed cognitive sharing of TV spectrum: the controversy at the Federal Communications Commission
【24h】

Unlicensed cognitive sharing of TV spectrum: the controversy at the Federal Communications Commission

机译：电视频谱的无牌认知共享：联邦通信委员会的争议

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

As societies become increasingly mobile and more dependent on information technologies, their radio spectrum also needs change. The basic spectrum management structure in all countries was developed over a long period, and much of the basic framework has remained stable for decades. The FCC is interested in making more spectrum available to unlicensed devices because of the explosive growth of IEEE 802.11/Wi-Fi unlicensed wireless LAN technology, and because the FCC recognizes that there is a great deal of "white space" that could be exploited by unlicensed devices. The FCC proposal selected the TV bands as an initial home for cognitive radio based on several factors. First, the frequencies used for TV can give greater range in rural areas than the microwave frequencies used for Wi-Fi, and can also give better building penetration than Wi-Fi in all areas. Second, TV broadcast systems usually use high antennas, and the intended receivers need greater than 10 dB signal-to-noise ratio (SNR) to function. A variety of controversial issues have emerged from public comments. One concern is that the confusion resulting from the proposal might discourage purchase of new digital televisions and hence delay the transition from analog to digital televisions. This would also delay the transfer of some current TV spectrum to new mobile uses, including public safety.
机译：随着社会变得越来越移动，越来越依赖信息技术，它们的无线电频谱也需要改变。所有国家的基本频谱管理结构都是经过长期发展的，而且许多基本框架在过去几十年中一直保持稳定。 FCC感兴趣的是，由于IEEE 802.11 / Wi-Fi无执照无线LAN技术的爆炸性增长，并且FCC认识到有很多“空白”可以被未授权设备使用，因此有兴趣向未授权设备提供更多频谱。未经许可的设备。 FCC提案基于几个因素，将电视频段选择为认知广播的最初场所。首先，在农村地区，电视使用的频率范围比Wi-Fi使用的微波频率范围更大，并且在所有地区都比Wi-Fi提供更好的建筑物穿透性。其次，电视广播系统通常使用高天线，并且预期的接收器需要大于10 dB的信噪比（SNR）才能起作用。公众评论中出现了许多有争议的问题。一个担忧是，该提案引起的混乱可能会阻止购买新的数字电视，从而延迟从模拟电视到数字电视的过渡。这也将延迟将某些当前电视频谱向包括公共安全在内的新移动用途的转移。

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