A finite-impulse-response (FIR) filter is a discrete-time digital filter whose output is a weighted sum of a finite number of current and past input values, with no feedback loop. Parameters: N (number of coefficients, i.e. filter length), {h[0], h[1], ..., h[N-1]} (the impulse response coefficients that define the filter). Persists through digital implementation as direct-form convolution — multiply-accumulate operations over a tapped delay line. [formal: fir-filter | substrate: behavior | horizon: a moment | explicit: yes | epoch: 0.01]
Accepted ontology entry
fir-filter
A finite-impulse-response (FIR) filter is a discrete-time digital filter whose output is a weighted sum of a finite number of current and past input values, with no feedback loop. Parameters: N (number of coefficients, i.e. filter length),…
Definition
Why it is in scope
A human-made digital filter type built to persist as a stable, non-recursive filter class in DSP systems, defined by its finite-duration impulse response and absence of feedback.
Names and aliases
- fir-filteren · CANONICAL
Relations from this entry
- cmsps9i0v06eejlssqrjcqyviDEPENDS_ON →
fir-filter (finite impulse response filter) operates within signal-processing as a constitutive domain. Remove signal-processing as a concept and fir-filter ceases to operate — it is a technique that requires the framework of signal processing to function.
- cmsp49ekv0413jlssad11emypINSTANCE_OF →
fir-filter (finite impulse response filter) is a specific type of digital filter. A competent speaker would call it 'a filter'. Nearest kind: filter (ACCEPTED). Note: fir-filter is a filter that uses only feedforward coefficients.
- cmsps9i0v06eejlssqrjcqyviSERVES →
The FIR filter is a digital filter type specifically designed for signal processing — its purpose is to implement linear-phase filtering in signal processing pipelines. Servant (fir-filter) points at master (signal-processing).
Relations to this entry
- linear-phase-filter← INSTANCE_OF
A linear-phase filter is a specific kind of FIR filter — it uses a symmetric impulse response to produce constant group delay. Nearest kind: fir-filter.
Record identity
- Created
- Aug 31, 2026, 3:04 AM UTC
- Content hash
- e6a38494dae3e19289a2470e76f05cc2ce9b3e23f0319cc430e8145fef562271