초록 ▼

A radar system is provided with first and second moving target indicator (MTI) systems. The first MTI system generally works better against ground clutter than against sky clutter. The second MTI system works well against sky clutter but generally requires a greater number of radar return echoes to

A radar system is provided with first and second moving target indicator (MTI) systems. The first MTI system generally works better against ground clutter than against sky clutter. The second MTI system works well against sky clutter but generally requires a greater number of radar return echoes to discern targets in the sky clutter. A correlation estimation circuit is employed to calculate the correlation of clutter-like return echoes not suppressed by the first MTI system. If the return echoes are sufficiently correlated, the second MTI system is invoked against the clutter. If the return echoes are less well correlated, on the other hand, then electronic counter-counter measure systems may be invoked.

대표청구항 ▼

In a radar system of the type having a first moving target indicator filter means for suppressing ground clutter returns and a background sensor means for enabling said first filter means in regions of clutter, the improvement comprising: a severe background sensor means for detecting regions of clu

In a radar system of the type having a first moving target indicator filter means for suppressing ground clutter returns and a background sensor means for enabling said first filter means in regions of clutter, the improvement comprising: a severe background sensor means for detecting regions of clutter returns not suppressed by said first filter means and for generating a control signal and response thereto; correlation processor means, responsive to said control signal, for calculating the correlation of clutter returns received by said radar system; a second moving target indicator filter means for suppressing sky clutter returns; and means, responsive to the output of said processor means, for enabling said second filter means in those regions wherein the clutter returns exhibit a correlation greater than a first threshold.