Comments on 'A 70 MHz multiplierless FIR Hilbert transformer in 0.35 mu m standard CMOS library'
In this comment we point out that the mapping from carry-propagation adders to carry-save adders in the context of shift-and-add multiplication is inconsistent. Based on this it is shown that the implementation in Ref. [1] does not achieve any complexity reduction in practice.
carry-save arithmetic common subexpression elimination (cse) multiple constant multiplication (mcm) fir filters