Fading Model: Difference between revisions

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[[Category:Block Docs]]
[[Category:Block Docs]]
[[Category:Stub Docs]]
This block implements a basic fading model simulator that can be used to help evaluate, design, and test various signals, waveforms, and algorithms.
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.
This algorithm implements the method described in
      Compact Rayleigh and Rician fading simulator based on random walk processes
      A. Alimohammad S.F. Fard B.F. Cockburn C. Schlegel
      26th November 2008


== 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'')
; Num Sinusoids (SoS model)
: 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).
: The number of sinusoids to use in simulating the channel; 8 is a good value


; Param 2
; Normalized Max Doppler (fD*Ts) (''R'')
: blah blah blah
: Normalized maximum Doppler frequency, fD * Ts
 
; LOS Model
: Include Line-of-Site path? selects between Rayleigh (NLOS) and Rician (LOS) models
 
; Rician factor (K) (''R'')
: Rician factor (ratio of the specular power to the scattered power)
 
; Seed
: Number to seed the noise generators


== 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 can be found at [https://raw.githubusercontent.com/gnuradio/gnuradio/master/gr-channels/examples/channel_tone_response.grc]
 
[[File:Channel_tone_response_fg.png|800px]]
 
== Example Output ==
 
[[File:Channel_tone_response_out.png|622px]]


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


; C++ files
; C++ files
: [https://github.com/gnuradio/gnuradio TODO]
: [https://github.com/gnuradio/gnuradio/blob/master/gr-channels/lib/fading_model_impl.cc]


; Header files
; Header files
: [https://github.com/gnuradio/gnuradio TODO]
: [https://github.com/gnuradio/gnuradio/blob/master/gr-channels/lib/fading_model_impl.h]


; Public header files
; Public header files
: [https://github.com/gnuradio/gnuradio TODO]
: [https://github.com/gnuradio/gnuradio/blob/master/gr-channels/include/gnuradio/channels/fading_model.h]


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

Latest revision as of 12:16, 19 December 2021

This block implements a basic fading model simulator that can be used to help evaluate, design, and test various signals, waveforms, and algorithms.

This algorithm implements the method described in 

      Compact Rayleigh and Rician fading simulator based on random walk processes
      A. Alimohammad S.F. Fard B.F. Cockburn C. Schlegel
      26th November 2008

Parameters

(R): Run-time adjustable

Num Sinusoids (SoS model)
The number of sinusoids to use in simulating the channel; 8 is a good value
Normalized Max Doppler (fD*Ts) (R)
Normalized maximum Doppler frequency, fD * Ts
LOS Model
Include Line-of-Site path? selects between Rayleigh (NLOS) and Rician (LOS) models
Rician factor (K) (R)
Rician factor (ratio of the specular power to the scattered power)
Seed
Number to seed the noise generators

Example Flowgraph

This flowgraph can be found at [1]

Channel tone response fg.png

Example Output

Channel tone response out.png

Source Files

C++ files
[2]
Header files
[3]
Public header files
[4]
Block definition
[5]
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