Higher order Σ-Δ modulation encodingfor design of multiplierless FIR filters
Chao-Liang Chen, Alan N. Willson · Electronics Letters · 1998
A technique is presented for the design of multiplierless FIR filters with canonical signed digit (CSD) coefficients based on higher-order Σ-Δ modulation with a CSD quantiser (ΣΔ-CSD). The proposed algorithm requires little computational resources and is capable of designing more types of filters and providing better performance than the previously proposed first-order method.