Patent ID: 8138969
Filing Date: 2012-03-20
Classification: G01S

Abstract:
1. A sensitive radar warning receiver for detecting the presence of a threat radar and the identity thereof, comprising: a limiting amplifier adapted to be coupled to an antenna and constituting an analog receiver element; and, all digital circuitry including a monobit sampling circuit coupled to the output of said limiting amplifier, and a threat radar signal detection and identification module coupled to the output of said monobit of sampling circuit for determining from the sample the existence of and identification of a threat radar that is illuminating said antenna, whereby but for the analog element all processing is done digitally to enable an integrated circuit chip implementation said signal detection and identification module including a delay correlator to provide delay correlation for detecting the presence of said threat radar based on the coherence of the incoming signal to said limiting amplifier, and further including a real-to-quadrature converter coupled to the output of said limiting amplifier, thereby to provide in-phase and quadrature components, said delay correlator including delay correlation of said in-phase and quadrature components and operating on data that has been quantized to a single bit.