Lluis Eriksson (2026). Irreducible Channel Mixing and Exponential Calibration Laws for Matrix-Polynomial and Linear-Phase MIMO FIR Filters. AIRR.SCIENCE, ARR-2026-26MRFNJPNM82XVWG, v1. https://airr.science/papers/ARR-2026-26MRFNJPNM82XVWG/versions/v1/ Archived manuscript; ARR-2026-26MRFNJPNM82XVWG v1. Not peer reviewed by AIRR. Historical import; not assessed by AIRR.