초록 ▼

This disclosure describes a radar clutter suppressor and target classifier that compares two or more video signals. Various signal conditioning and processing means are used for enhancing echo differences between targets and clutter caused by differences in polarization, carrier frequency, pulse len

This disclosure describes a radar clutter suppressor and target classifier that compares two or more video signals. Various signal conditioning and processing means are used for enhancing echo differences between targets and clutter caused by differences in polarization, carrier frequency, pulse length, antenna beamwidth, and antenna pointing direction. Signals are processed as if due to targets if the ratio of the video amplitudes are within a band of ratios and signals are suppressed as if due to clutter if the ratios are not within the band of ratios designated for targets. The invention includes methods for suppressing clutter caused by rain, land and sea.

대표청구항 ▼

A radar clutter suppressor comprising: a first means for providing at least three different carrier frequencies; a second means for providing at least three received signals representing said carrier frequencies wherein for each one of said carrier frequencies there is a particular one of said recei

A radar clutter suppressor comprising: a first means for providing at least three different carrier frequencies; a second means for providing at least three received signals representing said carrier frequencies wherein for each one of said carrier frequencies there is a particular one of said received signals representing said one of said carrier frequencies; a third means for providing at least three video signals in response to said received signals, wherein for each one of said received signals there is a particular one of said video signals responsive to said one of said received signals; comparator means for comparing the magnitudes of said video signals, by pairs, and for providing an output only when the ratio of the magnitudes of each pair of at least two pairs of said received signals is a ratio within one of a plurality of predetermined ranges of ratios, and each of said plurality of predetermined ranges of ratios includes unity ratio; processing means responsive to said output for providing clutter suppressed radar output and for indicating the presence of a target in the presence of said output.