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1 September 2000Target position extraction based on instantaneous frequency estimation in a fixed-reticle seeker
To extract a precise target position in the presence of infrared countermeasures and significant noise, we propose a new algorithm based on the instantaneous frequency (IF) estimation of the sinusoidal frequency modulation (SFM) signals for a fixed-reticle seeker. To estimate the IF for target position extraction, the proposed algorithm maps the multicomponent sFm signal into the time-frequency plane to examine its time-frequency distribution, and then applies the Hough transform. The simulation results show that the proposed algorithm can extract the target position efficiently in the presence of flare countermeasures and noise.
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Sung-Hyun Han, HyunKi Hong, SurngGabb Jahng, DongSun Seo, Jong Soo Choi, "Target position extraction based on instantaneous frequency estimation in a fixed-reticle seeker," Opt. Eng. 39(9) (1 September 2000) https://doi.org/10.1117/1.1287390