One Antenna, Twelve Radars: The Deinterleaving Problem

A receiver hands you one stream of pulses containing every radar in the sky, interleaved by arrival time and stripped of any label saying which pulse came from where. Deinterleaving is how you unshuffle that deck — and it decides whether everything downstream is truth or fiction. We build the Sequential Difference Histogram from scratch, walk into the harmonic trap that makes a 400 µs radar look like an 800 µs one, and show why validating a candidate PRI means chaining real pulses rather than trusting a peak.