winlowpass

Windowed low-pass FIR filter

Syntax

Sout = winlowpass(S,Fstop,Fpass,Fsamp)
[Sout,H] = winlowpass(S,Fstop,Fpass,Fsamp)
[Sout,H] = winlowpass(___,'Property',Value)
Parameters
  • S - Signal (N-element array)
  • Fstop - Stop-band frequency (scalar)
  • Fpass - Pass-band frequency (scalar)
  • Fsamp - Sampling frequency (scalar)
Returns
  • Sout - Filtered signal (N-element array)
  • H - Filter transfer function parameters (array)

Description

Sout = winlowpass(S,Fstop,Fpass,Fsamp)

Filters the N-point signal S using a Kaiser-windowed lowpass FIR filter with a transition band given by the pass-band Fpass and stop-band Fstop frequencies in Hz. The filter is then constructed according to the sampling rate Fsamp of the signal in Hz.

[Sout,H] = winlowpass(S,Fstop,Fpass,Fsamp)

The filter transfer function parameters H requested as a second output argument.

Additional Settings

Additional settings can be specified via name-value pairs. All property names are case insensitive and the property-value pairs can be passed in any order after the required input arguments have been passed.

P = winlowpass(___,'Property1',Value1,'Property2',Value2,___)
  • 'MinimalAttenuation' - Minimal sidelobe attenuation

    Minimal attenuation level [dB] of the first sidelobe after the stop-band.

    Default: 50

    Example:

    P = selregparam(___,'MinimalAttenuation',60)
  • ForwardBackward' - Forward-backward filtering

    Enables/disables forward-backward filtering of the signal for zero-phase filtering.

    Default: true

    Example:

    P = selregparam(___,'ForwardBackward',false)