A physically compact, wideband signal activity identification, demodulation and characterization, and direction finding device incorporates multiple and cascadable digital signal processing modules operating in asynchronous real time. The digital signal processing modules include a device for data buffering,...http://www.google.de/patents/US6898235?utm_source=gb-gplus-sharePatent US6898235 - Wideband communication intercept and direction finding device using hyperchannelization
