On the beat signal synchronisation of interferometric FMCW radars
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The authors present several beat signal synchronisation methods developed in the framework of interferometric frequency modulated continuous wave (FMCW) radars. Their purpose is to determine by post-processing the start moment of the beat signal repetition interval. An uncertainty in computing the beginning of the repetition intervals is translated in a phase error, which limits the radar's interferometric capabilities. The performances of the proposed methods are tested on real data acquired with an FMCW radar platform.