MULTIPATH SUPPRESSION TECHNIQUES BASED ON HIGHER-ORDER SPECTRA

THIS PROJECT WILL ADDRESS THE DEVELOPMENT OF MULTIPATH SUPPRESSION TECHNIQUES THAT ARE NEEDED TO SUPPORT RADAR-GUIDED CLOSE-COMBAT MISSILE APPLICATIONS. UNDERSCORING THIS EFFORT ARE ADVANCED SIGNAL PROCESSING ALGORITHMS BASED ON HIGHER-ORDER SPECTRA (HOS) TECHNIQUES, SUCH AS THE BISPECTRUM. HOS-BASED TECHNIQUES HAVE SHOWN A GREAT PROMISE IN TERMS OF ACCURACY, ROBUSTNESS AND PERFORMANCEIMPROVEMENT OVER AUTOCORRELATION (OR POWER SPECTRUM)-BASED METHODS IN THE FACE OF STATISTICAL UNCERTAINTIES OF MULTIPATH ENVIRONMENTS. CONSEQUENTLY, THE DEVELOPMENT AND APPLICATION OF HOS-BASED ALGORITHMS TO THE RADAR MISSILE GUIDANCE PROBLEM HAS BECOME TIMELY. THREE DIRECTIONS ARE COVERED DURING THIS EXPLORATORY DEVELOPMENT: (1) DEVELOPMENT OF HIGHER-ORDER SPECTRA ALGORITHMS FOR IDENTIFICATION AND SUPPRESSION OF MULTIPATH WITH EMPHASIS ON BICEPSTRAL APPROACHES; (2) DEVELOPMENT OF REAL-TIME SERIAL AND PARALLEL SIGNAL FUSION TECHNIQUES TO ACHIEVE SIGNAL RECONSTRUCTION AFTER MULTIPATH SUPPRESSION; AND (3) VERIFICATION OF THE PERFORMANCE AND COMPLEXITY OF THE NEW ALGORITHMS USING REALISTIC SYNTHETIC DATA.