Abstract
Symmetric FIR filters, which provide linear phase, are frequently used in digital signal processing. This paper presents a study of structures which take into account the particularities of the symmetry. A novel systolic structure is proposed. An efficient design is presented for the basic module which computes(x±y)h+G and which is only specific to symmetric filters. Special applications of carry-save or signed-digit notations, and tree-type multi-operand adders are shown to significantly enhance the computational speed of symmetric FIR filters.
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