Decimating FIR Filter: Difference between revisions
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: [https://github.com/gnuradio/gnuradio | : [https://github.com/gnuradio/gnuradio/blob/main/gr-filter/lib/fir_filter.cc fir_filter.cc] | ||
; Public header files | ; Public header files | ||
: [https://github.com/gnuradio/gnuradio | : [https://github.com/gnuradio/gnuradio/blob/main/gr-filter/include/gnuradio/filter/fir_filter.h fir_filter.h] | ||
; Block definition | ; Block definition | ||
: [https://github.com/gnuradio/gnuradio/blob/ | : [https://github.com/gnuradio/gnuradio/blob/main/gr-filter/grc/filter_fir_filter_xxx.block.yml filter_fir_filter_xxx.block.yml] | ||
Latest revision as of 15:21, 27 October 2023
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
- fir_filter.cc
- Public header files
- fir_filter.h
- Block definition
- filter_fir_filter_xxx.block.yml