{"id":10465,"date":"2013-06-29T15:14:18","date_gmt":"2013-06-29T20:14:18","guid":{"rendered":"http:\/\/bucktownbell.com\/?p=10465"},"modified":"2013-06-29T15:14:18","modified_gmt":"2013-06-29T20:14:18","slug":"mit-researchers-can-see-through-walls-using-wi-vi","status":"publish","type":"post","link":"http:\/\/bucktownbell.com\/?p=10465","title":{"rendered":"MIT researchers can see through walls using &#8216;Wi-Vi&#8217;"},"content":{"rendered":"<blockquote><p>Every time a Wi-Fi signal is reflected off an object, the shape and makeup of that object affects the signal that comes back. But when Wi-Fi hits a wall, most of the signal gets reflected off the wall and only a faint bit of it reflects off the people on the other side.<\/p>\n<p>To get around this, Wi-Vi transmits two Wi-Fi signals, one of which is the inverse of the other. When one signal hits a stationary object, the other cancels it out. But because of the way the signals are encoded, they don&#8217;t cancel each other out for moving objects. That makes the reflections from a moving person visible despite the wall between that person and the Wi-Vi device. Wi-Vi can translate those faint reflections into a real-time display of the person&#8217;s movements.<\/p><\/blockquote>\n<p>via <a href=\"http:\/\/www.itworld.com\/mobile-wireless\/363027\/mit-researchers-can-see-through-walls-using-wi-vi\">MIT researchers can see through walls using &#8216;Wi-Vi&#8217; | ITworld<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Every time a Wi-Fi signal is reflected off an object, the shape and makeup of that object affects the signal that comes back. But when Wi-Fi hits a wall, most of the signal gets reflected off the wall and only &hellip; <a href=\"http:\/\/bucktownbell.com\/?p=10465\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[737],"tags":[100,387,188,78],"class_list":["post-10465","post","type-post","status-publish","format-standard","hentry","category-stem","tag-interesting-research","tag-mit","tag-privacy","tag-wifi"],"_links":{"self":[{"href":"http:\/\/bucktownbell.com\/index.php?rest_route=\/wp\/v2\/posts\/10465","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/bucktownbell.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/bucktownbell.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/bucktownbell.com\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"http:\/\/bucktownbell.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=10465"}],"version-history":[{"count":0,"href":"http:\/\/bucktownbell.com\/index.php?rest_route=\/wp\/v2\/posts\/10465\/revisions"}],"wp:attachment":[{"href":"http:\/\/bucktownbell.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=10465"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/bucktownbell.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=10465"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/bucktownbell.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=10465"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}