User Reference:IIRBandpass - Revision history

Mellinger: /* Synopsis */

2025-10-16T19:35:37Z

Synopsis

← Older revision		Revision as of 19:35, 16 October 2025
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	==Synopsis==		==Synopsis==
	Design an IIR filter consisting of up to three parts (high-pass, low-pass and notch) and apply it as part of the signal-processing chain. To use it as a bandpass, specify the desired lower end of the band as a high-pass corner, and the desired upper end of the band as a low-pass corner.		Design an IIR filter consisting of up to three parts (high-pass, low-pass and notch) and apply it as part of the signal-processing chain. To use it as a bandpass, specify the desired lower end of the band as a high-pass corner, and the desired upper end of the band as a low-pass corner.

			The filters are implemented as a Butterworth filters of the specified order.

	==Authors==		==Authors==

2023-01-04T11:29:12Z

Downsample

← Older revision		Revision as of 11:29, 4 January 2023
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	===Downsample===		===Downsample===

	If ''LowPassCorner'' is set, downsample to a sampling rate of 4*''LowPassCorner'' provided that is smaller than the current sampling rate.		If ''LowPassCorner'' is set, downsample to a sampling rate of circa 4''LowPassCorner'' provided that is smaller than the current sampling rate. Downsampling is always is done by an integer factor such that the resulting sampling rate is close to (and larger than) 4''LowPassCorner''.

	The default is 1 (do downsampling).		The default is 1 (do downsampling).

2023-01-04T11:26:41Z

Rectification

← Older revision		Revision as of 11:26, 4 January 2023
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	===Rectification===		===Rectification===

	If set to 1, negative values will be replaced with zeros (Half-Wave). If set to 2, negative values will be replaced with their absolute values (Full-Wave). Set to 0 to disable rectification. Note that rectification is done ''after'' bandpass filtering, so another low pass filter is likely required to obtain an amplitude estimate.		If set to 1, negative values will be replaced with zeros (Half-Wave). If set to 2, negative values will be replaced with their absolute values (Full-Wave). Set to 0 (the default) to disable rectification. Note that rectification is done ''after'' bandpass filtering, so another low pass filter is likely required to obtain an amplitude estimate.

	==States==		==States==

2023-01-04T11:25:53Z

Downsample

← Older revision		Revision as of 11:25, 4 January 2023
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	The default is 1 (do downsampling).		The default is 1 (do downsampling).

			===Rectification===

			If set to 1, negative values will be replaced with zeros (Half-Wave). If set to 2, negative values will be replaced with their absolute values (Full-Wave). Set to 0 to disable rectification. Note that rectification is done ''after'' bandpass filtering, so another low pass filter is likely required to obtain an amplitude estimate.

	==States==		==States==

2023-01-04T11:11:58Z

Downsample

← Older revision		Revision as of 11:11, 4 January 2023
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	If ''LowPassCorner'' is set, downsample to a sampling rate of 4*''LowPassCorner'' provided that is smaller than the current sampling rate.		If ''LowPassCorner'' is set, downsample to a sampling rate of 4*''LowPassCorner'' provided that is smaller than the current sampling rate.

			The default is 1 (do downsampling).

	==States==		==States==

2023-01-04T11:01:48Z

Parameters

← Older revision		Revision as of 11:01, 4 January 2023
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	Filter order for the notch. The default is 4. A value of 0 disables the notch filter.		Filter order for the notch. The default is 4. A value of 0 disables the notch filter.

			===Downsample===

			If ''LowPassCorner'' is set, downsample to a sampling rate of 4*''LowPassCorner'' provided that is smaller than the current sampling rate.

	==States==		==States==

2014-05-23T18:56:19Z

Parameters

← Older revision		Revision as of 18:56, 23 May 2014
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	Filter order for the notch. The default is 4. A value of 0 disables the notch filter.		Filter order for the notch. The default is 4. A value of 0 disables the notch filter.

	~~===UnfilteredChannels===~~

	~~This is a list of indices to the channels should be left unfiltered (for example, hardware triggers and other auxiliary channels).~~

	==States==		==States==

2014-05-23T18:55:57Z

Parameters

← Older revision		Revision as of 18:55, 23 May 2014
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	Filter order for the notch. The default is 4. A value of 0 disables the notch filter.		Filter order for the notch. The default is 4. A value of 0 disables the notch filter.

			===UnfilteredChannels===

			This is a list of indices to the channels should be left unfiltered (for example, hardware triggers and other auxiliary channels).

	==States==		==States==

2012-06-21T15:27:28Z

← Older revision		Revision as of 15:27, 21 June 2012
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	Design an IIR filter consisting of up to three parts (high-pass, low-pass and notch) and apply it as part of the signal-processing chain. To use it as a bandpass, specify the desired lower end of the band as a high-pass corner, and the desired upper end of the band as a low-pass corner.		Design an IIR filter consisting of up to three parts (high-pass, low-pass and notch) and apply it as part of the signal-processing chain. To use it as a bandpass, specify the desired lower end of the band as a high-pass corner, and the desired upper end of the band as a low-pass corner.

	~~==Location==~~		==Authors==
	~~http://{{SERVERNAME}}/svn/trunk/src/contrib/SignalProcessing/HilbertSignalProcessing/CustomIIRFilter.cpp~~

	~~==Versioning==~~
	===Authors===
	Jeremy Hill		Jeremy Hill

2012-06-21T15:26:56Z

Synopsis

← Older revision		Revision as of 15:26, 21 June 2012
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	==Synopsis==		==Synopsis==
			Design an IIR filter consisting of up to three parts (high-pass, low-pass and notch) and apply it as part of the signal-processing chain. To use it as a bandpass, specify the desired lower end of the band as a high-pass corner, and the desired upper end of the band as a low-pass corner.
	Design an IIR filter consisting of up to three parts (high-pass, low-pass and notch) and apply it as part of the signal-processing chain.

	==Location==		==Location==