OSU ElectroScience Laboratory reports: "ElectroScience Engineers have invented a radar system that is virtually undetectable because its signal resembles random noise. The radar could have applications in law enforcement, the military and disaster rescue. Eric Walton, senior research scientist in Ohio State's ElectroScience Laboratory, said that with further development the technology could even be used for medical imaging."
I hate quoting from a press release, but this is the best information on I can find on this technology. I couldn't even find a public name for the technology. All that said, if this technology lives up to it claims it will have some amazing applications.