LogiCORE FIR Compiler - Why can I not use the multi-column support when my co-efficients are symmetrical?

AR#	22936	Search For Another Answer
Topic	IP-DSP
Last Updated	02/22/2007
Status	Active

Description

Keywords: taps, FIR compiler, DA FIR, MAC FIR, symmetrical, symmetrical, coefficient, v1.0, 2.0, 3.0

Why can I not use the multi-column support when my co-efficients are symmetrical?

Solution

This issue is a limitation of the FIR Compiler that is documented in the v2.0 and beyond Data Sheet. It becomes difficult to do folding when the co-efficients are symmetrical, and thus multi-column support was implemented for non-symmetrical coefficients only.