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.
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http://iet.metastore.ingenta.com/content/journals/10.1049/el_19981617
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content/journals/10.1049/el_19981617
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