Through-wall imaging method based on wifi signal

Abstract

The invention discloses a through-wall imaging method based on WiFi signals. The hardware equipment cost of the through-wall imaging method proposed by the present invention is extremely low, and the WiFi signal generated by the general wireless router can be used as the transmission signal of the imaging system, and the wireless router has been widely distributed in families, banks, shopping malls, office buildings and hotels, etc. The large number of places provides a rich signal source for the through-wall imaging system; the WiFi signal generated by the wireless router used has a wide bandwidth, which theoretically ensures the high resolution of the imaging; the WiFi signal frequency band generated by the wireless router used conforms to IEEE standard, common all over the world, and this frequency band is a free frequency band, no need to pay frequency band usage fees; the required hardware equipment is small in size, compared with traditional wall-penetrating radars, only a reference receiving antenna and a detection receiving antenna need to be configured; it is suitable for any penetrating radar Wall radar imaging method; the through-wall imaging method based on WiFi signals proposed by the present invention can realize through-wall imaging at low cost and high efficiency, and lays the foundation for effectively and quickly solving indoor emergencies.

Description

technical field [0001] The invention relates to the technical field of radar through wall imaging, in particular to a method for high-resolution through wall imaging based on WiFi (wireless identity) signal. Background technology [0002] With the development of low-cost public security, it has become an important topic in the world. In the event of bank robbery and other indoor emergencies, the bandits will first destroy the indoor optical monitor and do concealment work to the greatest extent to increase the difficulty of rescue. In the face of such public emergencies, once the indoor conditions cannot be controlled, the police officers will fall into a passive situation. [0003] Through wall imaging technology uses RF sensors to penetrate the wall to obtain target information. Therefore, through wall imaging system has unique advantages in the fields of monitoring, street fighting, search, dealing with indoor emergencies and so on. [0004] At present, police officers can det...

AI Technical Summary

Problems solved by technology

[0004] At present, police officers can use wall-penetrating radar to detect indoor conditions, but there are many problems in the current wall-penetrating radar system: such as high cost, the current simple wall-penetrating radar system costs hundreds of thousands or even millions of RMB The price means that not all departments can be equipped; the resolution is low, the current through-the-wall radar system can only be used for indoor positioning, and the specific status of the target cannot be accurately known; the volume is huge, and most of the current through-the-wall radars are active radars, so it must take into account the launch and receiving function, resulting in bulky and inconvenient operation

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