They are quite different. Wisee uses a single reciever and uses doppler shift to identify the gestures whereas this "through wall" system uses an array of transmitters and receivers that identify reflections from a position in space.
In layman's terms this system is more like a conventional camera but working in the radio spectrum whereas Wisee is like a microphone that can pick up changes in frequencies around it.
In layman's terms this system is more like a conventional camera but working in the radio spectrum whereas Wisee is like a microphone that can pick up changes in frequencies around it.