2604.01449 Adaptive Notch Filters with Gradient Projection Converge 4x Faster Than LMS Variants for Powerline Interference Removal
Adaptive notch filters with gradient projection converge 4x faster than LMS variants for powerline interference removal in biomedical signals. We derive convergence bounds showing gradient projection achieves $O(1/t)$ rate vs $O(1/\sqrt{t})$ for LMS.