DETECTION, COPY AND LOCALIZATION OF PULSED EMITTERS USING WAVELET-BASED DOMINANT MODE PREDICTION

AN SBIR PROJECT IS PROPOSED TO APPLY THE THEORY OF WAVELETS TO DETECTION, COPY, ND LOCALIZATION (DF) OF PULSED EMITTERS USING MULTISENSOR ANTENNA ARRAYS. THE PROOSED SYSTEM COMBINES THE SIMPLIEIED EDGE REPRESENTATION PROVIDED BY WAVELET TRANSFORMS WITH THE MULTIPATH/INTERFERENCE MITIGATING DETECTION, COPY, AND DF CAPABILITIES PROVIDED BY THE RECENTLY ADVANCED DOMINANT MODE PREDICTION (DMP) ALGORITHM. THE DMP ALGORITHM HAS DEMONSTRATED THE ABILITY TO ADAPT ANTENNA ARRAYS TO DETECT AND COPY PULSED EMITTERS IN THE PRESENCE OF BOTH FULLY-COHERENT MULTIPATH AND SEVERS (> 50 DB STRONGER) CO-CHANNEL INTERFERENCE, AND TO PERFORM SUSEQUENT SUPER- RESOLUTION DF ON THE COPIED EMITTERS, BY EXPLOITING THE ABRUPT ON AND OFF TRANSITIONS (EDGES) OF THE PULSED EMITTERS. HOWEVER, THE CURRENT DMP IMPLEMENTATION HAS A FIXED TEMPORAL (EDGE) RESOLUTION, AND CAN FAIL TO DETECT EMITTERS WITH PULSE EDGES THAT ARE SPREAD OVER AN INTERVAL OF TIME THAT IS GREATER THAN THIS RESOLUTION. THE PROPOSED SYSTEM SIGNIFICANTL IMPROVES THE RESOLUTION, PERFORMANCE, AND FLEXIBILITY OF THE DMP ALGORITHM, BY USING WAVELET REPRESENTATIONS OF THE RECEIVED DATA WAVEFORM OR OUTER PRODUCT TO PROVIDE ADAPTIVE (DATA-DIRECTED) OR NONADAPTIVE (CLASS-DIRECTED) RESOLUTION OF THE PULSE EDGES. THE PROPOSED SYSTEM ALSO PROVIDES A STRAIGHTFORWARD MEANS FOR EXTENDING THE THEORY OF WAVELETS TO MULTISENSOR PROCESSING APPLICATIONS.