Disclosed is a real-time pulse sorting apparatus of a preprocessor in a pulsed radiation detection system. The apparatus, responsive to digital signals generated by a system receiver, uses the instantaneous frequency as the address input to store discrete data groups in main memory. Each data group,...http://www.google.de/patents/US7184493?utm_source=gb-gplus-sharePatent US7184493 - Pulse sorting apparatus for frequency histogramming in a radar receiver system