Introduction:radarelectronicbackscattering;radarsignals;radarambiguityfunctionandmatchedfilter;syntheticapertureradarimaging.Time-frequencytransforms:lineartransforms;bilineartransforms.Detectionandextractionofsignalnoise:time-varyingfrequencyfiltering;SNRimprovementintime-frequencydomain;CFARdet