Solidot: 利用Wi-Fi看穿墙壁

Solidot

奇客的资讯，重要的东西

利用Wi-Fi看穿墙壁
http://solidot.org.feedsportal.com/c/33236/f/556826/s/2e164600/l/0L0Ssolidot0Borg0Cstory0Dsid0F35417/story01.htm
Jul 2nd 2013, 11:05

MIT教授Dina Katabi和研究生Fadel Adib研发出名叫Wi-Vi的系统（论文），利用Wi-Fi信号可视化墙壁背后的物体运动。其工作原理类似雷达和声纳，但更廉价：Wi-Vi发射两束Wi-Fi信号，其中一束与另一束可逆。当一束信号碰到一个固定物体，另一束会与之相互抵消。但由于信号编码的方式，它们不会对移动物体相互抵消，从而可以在墙壁或门后看到人体运动的可视化形式。Wi-Vi可以整合到手机或手持设备中，用于搜救或执法任务。Katabi表示他们正在研究更高分辨率的系统。This entry passed through the Full-Text RSS service — if this is your content and you're reading it on someone else's site, please read the FAQ at fivefilters.org/content-only/faq.php#publishers. Five Filters recommends: 'You Say What You Like, Because They Like What You Say' - http://www.medialens.org/index.php/alerts/alert-archive/alerts-2013/731-you-say-what-you-like-because-they-like-what-you-say.html



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