Rational Resampler: Difference between revisions

From GNU Radio
Jump to navigation Jump to search
(Created page with "Category:Block Docs Category:Stub Docs This is the template for the "Page-per-block Docs". This first section should describe what the block...")
 
 
(4 intermediate revisions by 3 users not shown)
Line 1: Line 1:
[[Category:Block Docs]]
[[Category:Block Docs]]
[[Category:Stub Docs]]
Rational resampling polyphase FIR filter.
This is the template for the [[:Category:Block_Docs|"Page-per-block Docs"]].  This first section should describe what the block does and how to use it, using however many paragraphs necessary.  Note that the title of the wiki page should match the block's name in GRC, i.e. the one defined in the block's .grc file.  Look at the [[FFT]] Block for a good example.


As this is a basic template, it's also in the [[:Category:Stub_Docs|"Stub Docs category"]]. Please improve it.
Either taps or fractional_bw may be specified, but not both.
 
If neither is specified, a reasonable default, 0.4, is used as the fractional_bw.
 
This block only works when the output language of the flowgraph is Python.


== 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>


; Param 1 (''R'')
; Interpolation
: Description of parameter, provide any tips or recommended values.  Note that the name of the parameter above should match the param's label that shows up in grc (e.g. Sample Rate).
: Interpolation factor (integer > 0)
 
; Decimation
: Decimation factor (integer > 0)
 
; Taps (''R'')
: Optional filter coefficients (sequence)


; Param 2
; Fractional BW
: blah blah blah
: Fractional bandwidth in (0, 0.5), measured at final freq (use 0.4) (float). In GNU Radio 3.8, the default value is 0, which should either be changed to a value 'between' 0 and 0.5; or just removed. Removing the value of fractional bandwidth will cause the block to use the default value of 0.4.


== Example Flowgraph ==
== Example Flowgraph ==


Insert description of flowgraph here, then show a screenshot of the flowgraph and the output if there is an interesting GUI.  Currently we have no standard method of uploading the actual flowgraph to the wiki or git repo, unfortunately. The plan is to have an example flowgraph showing how the block might be used, for every block, and the flowgraphs will live in the git repo.
This flowgraph shows a Rational Resampler block changing the sample rate from 960 to 500.
 
[[File:RTTY_rcv.png|800px]]


== Source Files ==
== Source Files ==


; C++ files
; C++ files
: [https://github.com/gnuradio/gnuradio TODO]
: [https://github.com/gnuradio/gnuradio/blob/main/gr-filter/lib/rational_resampler_impl.cc]


; Header files
; Header files
: [https://github.com/gnuradio/gnuradio TODO]
: [https://github.com/gnuradio/gnuradio/blob/main/gr-filter/lib/rational_resampler_impl.h]
 
; Public header files
: [https://github.com/gnuradio/gnuradio TODO]


; Block definition
; Block definition
: [https://github.com/gnuradio/gnuradio TODO]
: [https://github.com/gnuradio/gnuradio/blob/master/gr-filter/grc/filter_rational_resampler_xxx.block.yml]

Latest revision as of 13:35, 3 May 2023

Rational resampling polyphase FIR filter.

Either taps or fractional_bw may be specified, but not both.

If neither is specified, a reasonable default, 0.4, is used as the fractional_bw.

This block only works when the output language of the flowgraph is Python.

Parameters

(R): Run-time adjustable

Interpolation
Interpolation factor (integer > 0)
Decimation
Decimation factor (integer > 0)
Taps (R)
Optional filter coefficients (sequence)
Fractional BW
Fractional bandwidth in (0, 0.5), measured at final freq (use 0.4) (float). In GNU Radio 3.8, the default value is 0, which should either be changed to a value 'between' 0 and 0.5; or just removed. Removing the value of fractional bandwidth will cause the block to use the default value of 0.4.

Example Flowgraph

This flowgraph shows a Rational Resampler block changing the sample rate from 960 to 500.

RTTY rcv.png

Source Files

C++ files
[1]
Header files
[2]
Block definition
[3]
Retrieved from "https://wiki.gnuradio.org/index.php?title=Rational_Resampler&oldid=13111"