Development of the first "Wi-Fi radar" detector of objects behind walls

Able to detect moving targets and standing and sitting in the same precision.
British engineers developed the University of London, "University College London" The first model for a new radar is able to detect and track the movement of objects located behind the walls through signals "Wi-Fi" wireless.
Was based on the researchers, "Karl Woodbridge", Department of Electrical and Electronic Engineering, and "Kevin Chetty",
Department of Criminology and Security, the phenomenon of Doppler Effect ", which is a change a virtual frequency or wavelength of the waves when monitored by an observer moving for the source waveform, and so device works It monitors changes in frequency resulting from the radio waves reflected issued by the moving objects, when moving the body behind the wall changes the frequency result of relative movement between the source and the observer, if approached Source "person" of the observer "radar Wi-Fi" increasing frequency, and vice versa if it is removed source observer be less frequency.


The apparatus consists of a "radar Wi-Fi", which comes in the size of a small handbag, of the two antennas "antenna" and the unity of signal processing and control system to measure the frequencies of Wi-Fi within the region to monitor changes caused by moving objects behind walls.


According to the researchers, the device has proven itself to locate the person and the speed and direction behind the thick wall, and from the device itself emits radio waves, and thus it is difficult to detect the possibility of him.


He noted researchers to the possibility of using this device in multiple applications are in the household uses in the detection of criminals and carry out a survey of buildings in case of murder or bank robbery, in addition to the importance of using this device in the military.


At the great importance of this research by the Ministry of Defence (MoD), so I decided to finance and conduct extensive testing shows it can be used in a survey of buildings during a "war of the cities."


Abizaid and Woodbridge, the team still faces challenges, as it requires the device to further amendments and improvements to increase the sensitivity to allow capture and detection of people sitting or standing behind the walls, not a mover only, through the capture and detection process of breathing and the movements of inhalation and exhalation to such persons.


According to the research company "Strategy Analytics", was found signals Wi-Fi wireless all over the world, according to a new study conducted by the company recently, it was found that approximately 439 million house where there network waves Wi-Fi wireless until the end of 2011, ie about 25 per cent in each place in the world. The report predicts that the number of homes around the world equipped with Wi-Fi nearly 800 million by the year 2016, an increase of 42 per cent from last year.

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