Potentialities and challenges of WiFi-based passive radar

In recent years the use of passive bistatic radar (PBR) for surveillance purposes has received renewed interest. A number of studies have looked at the use of different analogue signals such as FM radio and UHF television broadcasts, as well as digital transmissions such as DAB, DVB, and GSM. In the above applications, PBR is rapidly reaching a point of maturity. Basically, even though there are still many challenges to be solved involving both technology development and processing techniques, PBR practical feasibility for long-range surveillance purposes has been well established.