FIR Filter Design

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Functions list: remez(4), remez2(4).

remez(vg, vr, vw, n) Returns coefficients for a FIR filter of length n generated by the Remez exchange algorithm.

Arguments:

- vg is a real vector, a grid of frequencies between 0 and 0.5.
- vr is a real vector of values between 0 and 1, length: vg / 2. Contains the frequency response over vg.
- vw is a real vector of values between 0 and 1, the same length as vr. Contains error weight over vg.
- n is an integer, the length of the filter.

Links:

1. Based on Parks-McClellan algorithm for FIR filter design (C version) by Jake Janovetz (part of the Analysis of Functional NeuroImages - a set of C programs for processing, analyzing, and displaying functional MRI (FMRI) data).
2. Parks-McClellan filter design algorithm.




remez.sm (13,43 KiB) scaricato 1900 volta(e).
remez.pdf (48,9 KiB) scaricato 1220 volta(e).


See also:

1. Design FIR band-pass/stop filters up to length ~2000

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FIRFilterDesign. Example 1 (rus).pdf (100,06 KiB) scaricato 1131 volta(e).

Plugin updated. Please try.

Changes:

- remez2() function added.

Links:

1. Sources from tomtit
2. Test example for remez2().

Calculation of digital filter coefficients for emulation/design High-Class Audio Multi-function Digital Filter SM5842AP/APT.

High-Class Audio Multi-function Digital Filter (SM5842AP-APT).sm (26,64 KiB) scaricato 1728 volta(e).
High-Class Audio Multi-function Digital Filter (SM5842AP-APT).pdf (169,04 KiB) scaricato 1001 volta(e).
SM5842AP.pdf (218,37 KiB) scaricato 1239 volta(e).



Links:

1. The example is audiophile's "holy" NPC SM5842 8X interpolating digital filter.