3D Mapping: The truth behind 2G 3G 4G 5G WIFI WIGIG

“Wireless data transmission systems such as wi-fi or Bluetooth emit coherent light—electromagnetic waves with a precisely known amplitude and phase. Propagating in space, this radiation forms a hologram—a two-dimensional wave front encoding a three-dimensional view of all objects traversed by the light beam. Here we demonstrate a scheme to record this hologram in a phase-coherent fashion across a meter-sized imaging region. We recover three-dimensional views of objects and emitters by feeding the resulting data into digital reconstruction algorithms. Employing a digital implementation of dark-field propagation to suppress multipath reflection, we significantly enhance the quality of the resulting images. We numerically simulate the hologram of a 10-m-sized building, finding that both localization of emitters and 3D tomography of absorptive objects could be feasible by this technique.”

Visualisation below proves what RF and WIFI can be used for: DARPA is also developing new visualization tools for SC2 to enable analysis and commentary on CIRNperformance.  For the first time ever, these tools make it possible to comprehend the RF spectrum and complex behaviors such as how the CIRNs are using the radio spectrum and how they interfere with each other. Researchers can quickly scrub back and forth through time in RF scenarios while focusing on different 3D views of the radios and their interactions both spatially and in the RF spectrum. The visualizations also provide a valuable way for spectators of the SC2 competition to understand what is happening so they can engage with the new CIRN technology.