Patent ID: 7696460
Filing Date: 2010-04-13
Classification: F41G,F42B,G01S

Abstract:
1. In a semiactive missile guidance system wherein a frequency modulated continuous wave signal illuminates a guided missile to provide a reference signal at such missile and also illuminates a target to provide an echo signal directed to such missile, the reference signal and the echo signal being processed in the guided missile to derive guidance signals for such missile, an arrangement for compensating for the frequency modulation on the echo signal, such arrangement comprising: (a) first means for detecting the frequency modulation on the reference signal received at the guided missile to derive a first and a second detected signal representative respectively of the phase and deviation of the frequency modulation on the reference signal; (b) second means for processing the first and the second detected signals to provide a compensation signal which is a replica of the frequency modulation on the echo signal; (c) third means for detecting the frequency modulation on the echo signal received at the guided missile to provide a guidance signal; and (d) fourth means for applying the compensation signal to the third means to null the frequency modulation on the guidance signal.