Impulsive interference might increase the number of false alarms in a surve
illance radar. The sidelobe-blanking (SLB) device, used in connection with
the radar system, reduces the number of false alarms when the interference
impinges on the antenna sidelobes. The paper describes how to design an SLB
system operating in correlated Gaussian clutter with known Doppler spectru
m plus white Gaussian thermal noise and impulsive interference. Closed-form
expressions of the probability of false alarm, the probability of blanking
a target received in the main lobe, and the probability of blanking a cohe
rent repeater interference (CRT) are also derived for two statistical model
s of target/CRI, namely: Swerling-0 (known amplitude and random phase), and
Swerling-I (random amplitude and random phase).