Fast Noise Source: Difference between revisions
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Similar to the Noise Source block, except it uses less CPU by pre-generating a pool of random variates taken from the specified distribution. At runtime, samples are then uniform randomly chosen from this pool which is a very fast operation. | [[Category:Block Docs]] | ||
Similar to the [[Noise Source]] block, except it uses less CPU by pre-generating a pool of random variates taken from the specified distribution. At runtime, samples are then uniform randomly chosen from this pool which is a very fast operation. | |||
Supports output of type complex, float, int, short | Supports output of type complex, float, int, short | ||
== Parameters == | |||
; Noise Type | |||
: The random distribution to use, only Gaussian and Uniform are supported | |||
; Amplitude | |||
: The standard deviation of a 1-d noise process. If this is the complex source, this parameter is split among the real and imaginary parts | |||
; Seed | |||
: Seed for random generators. Note that for uniform and Gaussian distributions, this should be a negative number. | |||
; Variate Pool Size | |||
: Number of samples to pre-generate | |||
== 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. | |||
== Source Files == | |||
; C++ files | |||
: [https://github.com/gnuradio/gnuradio/blob/main/gr-analog/lib/fastnoise_source_impl.cc] | |||
; Header files | |||
: [https://github.com/gnuradio/gnuradio/blob/main/gr-analog/lib/fastnoise_source_impl.h] | |||
; Public header files | |||
: [https://github.com/gnuradio/gnuradio/blob/main/gr-analog/include/gnuradio/analog/fastnoise_source.h] | |||
; Block definition | |||
: [https://github.com/gnuradio/gnuradio/blob/main/gr-analog/grc/analog_fastnoise_source_x.block.yml] | |||
Latest revision as of 17:22, 5 March 2024
Similar to the Noise Source block, except it uses less CPU by pre-generating a pool of random variates taken from the specified distribution. At runtime, samples are then uniform randomly chosen from this pool which is a very fast operation.
Supports output of type complex, float, int, short
Parameters
- Noise Type
- The random distribution to use, only Gaussian and Uniform are supported
- Amplitude
- The standard deviation of a 1-d noise process. If this is the complex source, this parameter is split among the real and imaginary parts
- Seed
- Seed for random generators. Note that for uniform and Gaussian distributions, this should be a negative number.
- Variate Pool Size
- Number of samples to pre-generate
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.
Source Files
- C++ files
- [1]
- Header files
- [2]
- Public header files
- [3]
- Block definition
- [4]