active beam steering to camouflage transmission [was: How safe is smartphones today?]

On Sun, Apr 6, 2014 at 12:14 PM, grarpamp wrote:

... Agreed near-unlimited-width SDR has fun potential, and for cpunks some equally hard to identify/jam/locate encrypted comms that don't interfere with traditional narrow comms.

past experiments with direction finding gear has shown it very dependent on key assumptions. use of beam steering to thwart direction finding and triangulation a world of fun. relevant references solicited!