Documentation

Fixed-Point Filters

Fixed-point filter design

System Objects

dsp.AllpoleFilter IIR Filter with no zeros
dsp.BiquadFilter IIR filter using biquadratic structures
dsp.CICDecimator Decimate input using Cascaded Integrator-Comb filter
dsp.CICInterpolator Interpolate signal using Cascaded Integrator-Comb filter
dsp.FIRDecimator Polyphase FIR decimator
dsp.FIRInterpolator Polyphase FIR interpolator
dsp.FIRFilter Static or time-varying FIR filter
dsp.FIRRateConverter Sample rate converter
dsp.IIRFilter Infinite Impulse Response (IIR) filter
dsp.LMSFilter LMS adaptive filter
dsp.SubbandAnalysisFilter Decompose signal into high-frequency and low-frequency subbands
dsp.SubbandSynthesisFilter Reconstruct signal from high-frequency and low-frequency subbands

Functions

autoscale Automatic dynamic range scaling
freqrespest Frequency response estimate via filtering
freqrespopts Options for filter frequency response analysis
freqz Frequency response of filter
impz Filter impulse response
isstable Determine whether filter is stable
limitcycle Response of single-rate, fixed-point IIR filter
noisepsd Power spectral density of filter output due to roundoff noise
noisepsdopts Options for running filter output noise PSD
qreport Most recent fixed-point filtering operation report
scale Scale sections of SOS filter
set2int Configure filter for integer filtering
specifyall Fixed-point scaling modes in direct-form FIR filter
zplane Zero-poles plots for filters

Blocks

Biquad Filter Model biquadratic IIR (SOS) filters
CIC Decimation Decimate signal using Cascaded Integrator-Comb filter
CIC Interpolation Interpolate signal using Cascaded Integrator-Comb filter
Discrete Filter Model Infinite Impulse Response (IIR) filters
Discrete FIR Filter Model FIR filters
Filter Realization Wizard Construct filter realizations using digital filter blocks or Sum, Gain, and Delay blocks
FIR Decimation Filter and downsample input signals
FIR Interpolation Upsample and filter input signals
FIR Rate Conversion Upsample, filter, and downsample input signals
LMS Filter Compute output, error, and weights using LMS adaptive algorithm
Two-Channel Analysis Subband Filter Decompose signal into high-frequency and low-frequency subbands
Two-Channel Analysis Subband Filter Decompose signal into high-frequency and low-frequency subbands
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