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Offline uni  
#1 Posted : 06 May 2013 22:05:06(UTC)
uni


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Joined: 10/11/2010(UTC)
Posts: 1,324
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FIR Filter Design

SMath Studio compatibility SMath Viewer compatibility mono compatibility Extension page Sources


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 (14kb) downloaded 94 time(s).
remez.pdf (49kb) downloaded 107 time(s).


See also:

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

Edited by user 17 November 2021 23:39:52(UTC)  | Reason: Not specified

File Attachment(s):
FIRFilterDesign. Example 1 (rus).pdf (101kb) downloaded 155 time(s).
Russia ☭ forever
Viacheslav N. Mezentsev
thanks 2 users thanked uni for this useful post.
on 07/05/2013(UTC),  on 07/05/2013(UTC)
Offline uni  
#2 Posted : 17 November 2021 23:20:00(UTC)
uni


Rank: Advanced Member

Groups: Registered, Advanced Member
Joined: 10/11/2010(UTC)
Posts: 1,324
Man
Russian Federation

Was thanked: 1157 time(s) in 668 post(s)
SMath Studio compatibility

Plugin updated. Please try.

Changes:

- remez2() function added.

Links:

1. Sources from tomtit
2. Test example for remez2().
Russia ☭ forever
Viacheslav N. Mezentsev
Offline uni  
#3 Posted : 29 December 2021 20:34:56(UTC)
uni


Rank: Advanced Member

Groups: Registered, Advanced Member
Joined: 10/11/2010(UTC)
Posts: 1,324
Man
Russian Federation

Was thanked: 1157 time(s) in 668 post(s)
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 (27kb) downloaded 17 time(s).
High-Class Audio Multi-function Digital Filter (SM5842AP-APT).pdf (170kb) downloaded 16 time(s).
SM5842AP.pdf (219kb) downloaded 10 time(s).

Click to enlarge Click to enlarge

Links:

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

Edited by user 29 December 2021 22:30:42(UTC)  | Reason: Not specified

Russia ☭ forever
Viacheslav N. Mezentsev
thanks 1 user thanked uni for this useful post.
on 30/12/2021(UTC)
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