Decimating FIR Filter: Difference between revisions
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For a large number of taps, consider using an [[FFT Filter]], see [http://www.trondeau.com/blog/2014/2/27/to-use-or-not-to-use-fft-filters.html] | For a large number of taps, consider using an [[FFT Filter]], see [http://www.trondeau.com/blog/2014/2/27/to-use-or-not-to-use-fft-filters.html] | ||
For standard filters such as lowpass, highpass, bandpass, etc., the filter.firdes and filter.optfir classes provide convenient generating methods. | |||
== Parameters == | == Parameters == | ||
(''R''): <span class="plainlinks">[https://wiki.gnuradio.org/index.php/GNURadioCompanion#Variable_Controls ''Run-time adjustable'']</span> | (''R''): <span class="plainlinks">[https://wiki.gnuradio.org/index.php/GNURadioCompanion#Variable_Controls ''Run-time adjustable'']</span> | ||
; | ; Decimation | ||
: | : Decimation rate. The output stream will have this decimation applied to it. A decimation rate of 1 simply means no decimation. If decimation is set higher than 1, make sure the filter will remove energy outside of the "output region", i.e. -Fs/2 to Fs/2 where Fs is the input sample rate divided by the decimation rate. | ||
; | ; Taps (''R'') | ||
: | : Taps to use in FIR filter. | ||
; Sample Delay | |||
: Additional samples to delay by, default is 0 or no delay. | |||
== Example Flowgraph == | == Example Flowgraph == | ||
This flowgraph implements a Broadcast FM stereo receiver using basic blocks. | |||
[[File:USRP_FM_stereo_fg.png|644px]] | |||
== Source Files == | == Source Files == |
Revision as of 14:22, 29 November 2020
This is GNU Radio's "normal" FIR Filter.
For a large number of taps, consider using an FFT Filter, see [1]
For standard filters such as lowpass, highpass, bandpass, etc., the filter.firdes and filter.optfir classes provide convenient generating methods.
Parameters
(R): Run-time adjustable
- Decimation
- Decimation rate. The output stream will have this decimation applied to it. A decimation rate of 1 simply means no decimation. If decimation is set higher than 1, make sure the filter will remove energy outside of the "output region", i.e. -Fs/2 to Fs/2 where Fs is the input sample rate divided by the decimation rate.
- Taps (R)
- Taps to use in FIR filter.
- Sample Delay
- Additional samples to delay by, default is 0 or no delay.
Example Flowgraph
This flowgraph implements a Broadcast FM stereo receiver using basic blocks.
Source Files
- C++ files
- TODO
- Header files
- TODO
- Public header files
- TODO
- Block definition
- GRC File