Patent ID: 6388604
Filing Date: 2002-05-14
Classification: G01S

Abstract:
A pulse/LPI signal discriminator comprising:(a) a series circuit connected to an input of a threshold detector that produces a trigger signal when an input to the detector is above a predetermined threshold; (b) an input to the series circuit being connected to an input of an IF amplifier that soft-limits any high-peak short-pulse IF signals in a received IF signal; (c) a successive detector logarithmic video amplifier (SDLVA) in the series circuit being connected to an output of the IF amplifier; (d) an output from an integrator located after the amplifiers in the series circuit being connected to an input of the threshold detector, the integrator integrating signals in the series circuit over a predetermined period of time and producing a high output signal when a LPI signal is present in the IF signal; and (e) a high output from the integrator to the threshold detector resulting in said trigger signal being created.