Patent ID: 6646602
Filing Date: 2003-11-11
Classification: G01S

Abstract:
A system for locating the position of an emitter, said emitter emitting a cyclostationary signal having time domain features and noise, said cyclostationary signal occupying a band within a first frequency range, said system comprising:a first platform having a first motion, said first platform located at a first range from said emitter, and a second platform having a second motion, said second platform located at a second range from said emitter, said first platform having tunable bandpass means for detecting said cyclostationary signal within said band, said band within said first frequency range, said tunable bandpass means extracting said time domain features and noise from said cyclostationary signal to obtain a result; means for thresholding said result to reduce said noise thus generating a second result; means for extracting frequency domain markers from said second result using one or more templates; means for computing said first range from said frequency domain markers; means for transmitting said frequency domain markers to said second platform using a wireless link, said second platform having means for receiving said frequency domain markers from said first platform using said wireless link, said wireless link operating within a second frequency range, said second frequency range separate and distinct from said first frequency range; and means at said second platform for using said frequency domain markers detected by said first platform to enhance detection of said cyclostationary signal and said time domain features and noise at said second platform.