Drift-Aware Tonal Interference Suppression in Real DSP Systems
Introduction In real systems, tonal interference rarely stays stationary. It drifts with: temperature load / RPM supply variation sampling clock error mechanical wear Engineers usually feel this problem as: “my notch worked yesterday but fails today” “the spur moves and the filter misses it” “if I tighten Q it becomes unstable or fragile” This is not a filter-design problem first. It is a detection + modeling + synthesis architecture problem. ...