Science Fiction
Dictionary
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
 |
See Through Walls With Wireless Networks
See through walls by using the way signal strength varies in wireless networks? It ought to be possible and now researchers at the University of Utah say that they can do it with variance-based radio tomographic imaging (VRTI).
According to their paper, VRTI images movement, not static changes in attenuation. In the image below, a human subject is taking small steps randomly around and through the space marked as (17.6, 21.3) in the graph shown below. The white spot shows where VRTI 'sees' the subject.
(Wireless network spying with variance-based radio tomographic imaging )
The basic idea is straightforward. The signal strength at any point in a network is the sum of all the paths the radio waves can take to get to the receiver. Any change in the volume of space through which the signals pass, for example caused by the movement of a person, makes the signal strength vary. So by "interrogating" this volume of space with many signals, picked up by multiple receivers, it is possible to build up a picture of the movement within it.In tests with a 34-node network set up outside a standard living room, Wilson and Patwari say they were able to locate moving objects in the room to within a meter or so.
Interested in seeing through walls? Take a look at four different technologies - Prism 200, LEXID handheld, LifeReader and the DARPA Radar Scope.
Science fiction fans have enjoyed various versions of this technology for many years. Consider the Subphoton Search Ray from The Shining One (1937), the Probability Time Wave Tube from Elimination (1936) and the X-Beam Projector from Diamond Planetoid (1937).
From Through-Wall Motion Tracking Using Variance-Based Radio Tomography Networks via MIT's Technology Review.
Scroll down for more stories in the same category. (Story submitted 10/1/2009)
Follow this kind of news @Technovelgy.| Email | RSS | Blog It | Stumble | del.icio.us | Digg | Reddit |
Would
you like to contribute a story tip?
It's easy:
Get the URL of the story, and the related sf author, and add
it here.
Comment/Join discussion ( 0 )
Related News Stories - (" Surveillance ")
Goodness Gracious Me! Google Tries Face Recognition Security
'The actuating mechanism that should have operated by the imprint of her image on the telephoto cell...' - Schachner and Zagat, 1931.
Live Stream With Meta-Ban Multimodal Smart Glasses
'...the bug-eyed, opaque gape of her True-Vu lenses.' - David Brin, 1990.
Brin's 1990 Novel Earth Still Full Of Predictions
'... making the point that their likenesses, every move they made, were being transmitted.' - David Brin, 1990.
Amazon One Is Frank Herbert's Palm Lock
'A palm lock must be keyed to one individual's hand shape and palm lines.' - Frank Herbert, 1965.
Technovelgy (that's tech-novel-gee!) is devoted to the creative science inventions and ideas of sf authors. Look for the Invention Category that interests you, the Glossary, the Invention Timeline, or see what's New.
Science Fiction
Timeline
1600-1899
1900-1939
1940's 1950's
1960's 1970's
1980's 1990's
2000's 2010's
Current News
Biohybrid Robots Made Of Living And Synthetic Materials
'If the biological robots were not living creatures, they were certainly very good imitations.'
Drug Induces Hibernation-Like State In Humans
'... drugged and chilled and stowed in sleep tanks.'
Poul Anderson's 'Brain Wave'
"Everybody and his dog, it seemed, wanted to live out in the country; transportation and communication were no longer isolating factors."
AI Note-Taking From Google Meet
'... the new typewriter that could be talked to, and which transposed the spoken sound into typed words.'
Qore IcePlates Are Personal Cooling Suits
'... underneath they consisted of networks of cooling tubes against the skin.'
P1 Just The Latest Robot To Take A Beating From Humans
'...we mere people come second.'
Waymo Cars Shout At Each Other, Autonomously
'My cars talk to one another. I have no doubt about it...'
Your Solar Electric Paint Is Ready, Larry Niven
'...you spray it on.'
How Long Till We Have These Tattoos?
Truth or fiction?
Seeing Faces On Grains Of Sand (AI Pareidolia)
'... the imprint of her image on the telephoto cell.'
Lunar Biorepository Proposed For Cryo-Preservation Of Earth Species
'...there was no one alive who had ever seen them. But they existed in the Life Bank.'
Tele-Driving Offers Jobs For Tele-Drivers, Not AIs
''...some bored drone pusher in a remote driving centre...'
Autonomous Robotic Dentist - Would You Say 'Ahhh'?
You might be surprised at how much more efficient this could be.
GM Scraps Cruise Origin Robotaxi With No Steering Wheel
'Ames tinkered around with something on the instrument board when he got in; and in a few moments we were off.'
Taza Aya Air-Curtain Tech Protects Turkey Workers
'I'm going to have to buy a filter-mask.'
Torobo Humanoid Robot Hammers A Nail
7-axis dual arms, 3-axis waist (pitch, pitch, yaw), 3-axis neck (yaw, pitch, roll), and 4-axis undercarriage!
