Difference between revisions of "Decimating FIR Filter"

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; Block definition
 
; Block definition
 
: [https://github.com/gnuradio/gnuradio/blob/0cb3f2a03d4e9320b7882251ed14876db07249d2/gr-filter/grc/filter_fir_filter_xxx.block.yml GRC File]
 
: [https://github.com/gnuradio/gnuradio/blob/0cb3f2a03d4e9320b7882251ed14876db07249d2/gr-filter/grc/filter_fir_filter_xxx.block.yml GRC File]
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== Outside References ==
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:  [http://blog.sdr.hu/grblocks/xlating-fir.html|Frequency Xlating FIR Filter]

Revision as of 05:51, 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.

USRP FM stereo fg.png

Source Files

C++ files
TODO
Header files
TODO
Public header files
TODO
Block definition
GRC File


Outside References

Xlating FIR Filter