OSNR_v1 Class Reference

Optical signal-to-noise (OSNR) loading block. More...

Inherits unit.

Public Member Functions
function	OSNR_v1 (in param)
	Class constructor. More...
function	traverse (in obj, in sig)
	Traverse function. More...
Public Member Functions inherited from unit
function	traverseNode (in obj)
	Set unique ID when creating a unit. More...
function	connectOutput (in obj, in uobj, in unitOutput, in nextUnitInput)
	Specify where signal should go next. More...
function	connectOutputs (in obj, in units, in destInputs)
	Specify where signal should go next. More...
function	writeInputBuffer (in obj, in sig, in inputId)
	write input buffer
function	horzcat (in varargin)
	horizontal concatenation
function	vertcat (in varargin)
	vertical concatenation
function	setparams (in obj, in params, in REQUIRED_PARAMS, in QUIET_PARAMS)
	set parameters More...
function	view (in obj)
	Show interactive GUI through unit_view-class.

Public Attributes
Property	OSNR
	Optical signal-to-noise ratio (OSNR) [dB].
Property	NBW
	Noise bandwidth [nm].
Property	assumeNoiseFreeEnabled
	Flag to assume the input signal is noise free (ignore SNR information)
Property	nInputs
	Number of inputs.
Property	nOutputs
	Number of outputs.
Public Attributes inherited from unit
Property	inputBuffer
	Buffer for storing inputs as we traverse the graph.
Property	nextNodes
	Children nodes.
Property	destInputs
	Destination inputs in children.
Property	results
	For storing results.
Property	label
Property	draw
	enable/disable plotting
Property	nInputs
	Number of signals traverse expects.
Property	nOutputs
	Number of outputs traverse expects.

Detailed Description

Optical signal-to-noise (OSNR) loading block.

Adds noise based on desired optical SNR (OSNR) and input signal power.

If the input signal is noisy (SNR ~= inf), a quantity of noisy required to reach the desired OSNR will be added to the noise already present. If assumeNoiseFreeEnabled is set to 1, the information on input noise are discarded and all the input power will be considered signal power.

Do not cascade many of these; Use EDFA instead (see EDFA_v1).

Example:

param = struct('OSNR', 20);
osnr = OSNR_v1(param);

param.sig.L = 10e6;
param.sig.Fs = 64e9;
param.sig.Fc = 193.1e12;
param.sig.Rs = 10e9;
param.sig.PCol = [pwr(20,{-2,'dBm'}), pwr(-inf,{-inf,'dBm'})];
E = rand(1000,2);

sIn = signal_interface(E, param.sig);
sOut = osnr.traverse(sIn);
sOut.P.getOSNR(sOut)

Author

Molly Piels

Simone Gaiarin

Version

1

Definition at line 37 of file OSNR_v1.m.

Constructor & Destructor Documentation

function OSNR_v1::OSNR_v1

(

in

param

)

Class constructor.

Construct an OSNR object that will add the amount of noise required to obtain the specified OSNR when traversed.

Parameters

param.OSNR	Desired OSNR [dB].
param.NBW	Noise bandwidth [nm]. [Default: 0.1].
param.assumeNoiseFreeEnabled	Ignore input signal SNR information. [Default: false].

Return values

obj	instance of the OSNR_v1 class

Member Function Documentation

function OSNR_v1::traverse ( in  obj, in  sig  )

virtual

Traverse function.

Adds noise based on desired optical SNR (OSNR) and input signal power. Automatically tracks power and signal SNR.

Parameters

sig	Noise free input signal

Return values

sig	Noise loaded signal

Reimplemented from unit.

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The documentation for this class was generated from the following file:

• library/ch/OSNR_v1.m