Decimation Filter Details (Gen 3/DFE) - 2.6 English - PG269

Zynq UltraScale+ RFSoC RF Data Converter v2.6 Gen 1/2/3/DFE LogiCORE IP Product Guide (PG269)

Document ID
PG269
Release Date
2024-11-13
Version
2.6 English

The following lists the coefficients and frequency response plots of all decimation filters. These are all half-band filters, so only the center tap value and the first half are listed.

FIR 1a (2x)

Center Tap: 65536
First Half: 5,0,-17,0,44,0,-96,0,187,0,-335,0,565,0,-906,0,1401,0,-2112,0,3145,0,-4723,0,7415,0,-13331,0,41526

FIR 1b (3x)

Center Tap: 174763
2,6,0,-17,-27,0,57,79,0,-143,-187,0,307,385,0,-590,-721,0,1050,1254,0,-1757,-2063,0,2807,3256,0,-4339,-4991,0,6579,7549,0,-9975,-11517,0,15633,18486,0,-27325,-34856,0,71618,144204
Figure 1. FIR 1a and FIR 1b Frequency Response (Gen 3/DFE)

FIR 1c (5x)

Center Tap: 104858
First Half: 2,0,-4,-10,-13,-11,0,17,35,43,32,0,-47,-91,-107,-78,0,106,198,228,162,0,-210,-386,-437,-304,0,383,693,772,531,0,-652,-1166,-1286,-875,0,1056,1872,2049,1384,0,-1648,-2905,-3163,-2127,0,2514,4421,4804,3227,0,-3819,-6731,-7340,-4956,0,5956,10615,11742,8070,0,-10195,-18821,-21778,-15872,0,24203,52516,79099,98013
Figure 2. FIR 1c (5x) Frequency Response (Gen 3/DFE)

FIR 2 (2x) Coefficients:

Center Tap: 16384
First Half: -12,0,84,0,-337,0,1008,0,-2693,0,10142

FIR 3/4 (2x) Coefficients

Note: FIR 3 and 4 have the same coefficients.
Center Tap: 2048
First Half: -6,0,54,0,-254,0,1230
Figure 3. FIR 2, 3 and 4 Frequency Response (Gen 3/DFE)