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hwfilter_406K25.m
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% HW filter generator
% Copyright (C) 2024 Patrik Kluba <[email protected]>
%
% Permission is hereby granted, free of charge, to any person obtaining a copy
% of this software and associated documentation files (the "Software"), to deal
% in the Software without restriction, including without limitation the rights
% to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
% copies of the Software, and to permit persons to whom the Software is
% furnished to do so, subject to the following conditions:
%
% The above copyright notice and this permission notice shall be included in all
% copies or substantial portions of the Software.
%
% THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
% IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
% FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
% AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
% LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
% OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
% SOFTWARE.
%
% SPDX-License-Identifier: MIT
function [Hd, name, Fs, pbfs, sbfs] = hwfilter_406K25
Fs = 406250;
Fsout = 288000; % Fs*11615/16384
N = 28;
CEMs = {'c', 'w'};
dens = 20;
[F, A, W] = genaa(Fs, Fsout, 58650*2);
b = fircband(N, F/(Fs/2), A, W, CEMs, {dens});
b = b / 1.001373923607624894;
Hd = dfilt.dffir(b);
name = sprintf("Antialias filter for %.3f -> %.3f Ksps decimation for passband reduction", Fs/1000, Fsout/1000);
[pbfs, sbfs] = genbandranges(F, A);
% [EOF]