ResampleSkewJitter_v1 Class Reference

Resampler, rectangular anti-aliasing, and timing impairments insertion. More...

Inherits unit.

Public Member Functions
function	ResampleSkewJitter_v1 (in param)
	Class constructor. More...
function	traverse (in obj, in in)
	Main function call.
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	nOutputs
	Number of outputs.
Property	nInputs
	Number of inputs.
Property	resamplingRate
	Downsampling Rate.
Property	outputSamplingRate
	Output Sampling Rate.
Property	skew
	Skew.
Property	jitterVariance
	Jitter Variance.
Property	clockError
	Clock deviation.
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

Resampler, rectangular anti-aliasing, and timing impairments insertion.

This function resample the input signal doing anti-aliasing in a signal. It also inserts timing impairments such as jitter, skew and clock deviance.

Observations The input signal shall be a complex signal_interface signal.

Example

param.resamp.reamplingRate = 0.5;
resamp = ResampleSkewJitter_v1(param.resamp);

param.sig.Fs = 64e9;
param.sig.Fc = 0;
param.sig.Rs = 32e9;
param.sig.PCol = [pwr(20,{-2,'dBm'}), pwr(-inf,{-inf,'dBm'})];
Ein = upsample((randi(2,1000,1)-1.5)*2 + 1j*(randi(2,1000,1)-1.5)*2,2);
sigIn = signal_interface(Ein, param.sig);

sigOut = resample.traverse(sigIn);

Advanced Example

param.resamp.outputSamplingRate = 128e9;
param.resamp.skew = [0 0.5];
param.resamp.jitterVariance = 1e-8;
param.resamp.clockError = 5e-6;
upsamp = ResampleSkewJitter_v1(param.resamp);

param.sig.Fs = 64e9;
param.sig.Fc = 0;
param.sig.Rs = 32e9;
param.sig.PCol = [pwr(20,{-2,'dBm'}), pwr(-inf,{-inf,'dBm'})];
Ein = upsample((randi(2,1000,1)-1.5)*2 + 1j*(randi(2,1000,1)-1.5)*2,2);
sigIn = signal_interface(Ein, param.sig);

sigOut = resample.traverse(sigIn);

Author

jcesardiniz

Version

1

Definition at line 48 of file ResampleSkewJitter_v1.m.

Constructor & Destructor Documentation

function ResampleSkewJitter_v1::ResampleSkewJitter_v1

(

in

param

)

Class constructor.

• properties

Parameters

param.skew	Skew - A vector with skews: [I1, Q1, I2, Q2, ...]. Normalized by symbol period.
param.jitterVariance	JitterVariance - The variance of a random walk Jitter.
param.clockError	ClockError - The clock deviance. E.g. 1e-6 means 1 ppm.
param.outputSamplingRate	OutputSamplingRate - The sampling rate of output signal. It will calculate automatically the resamplingRate if defined. It also has priority over resamplingRate.
param.resamplingRate	ResamplingRate - This is a downsampling rate. E.g. if the number of samples per symbol of input is 6 and the resampling rate is 3, the output will have 2 samples per symbol. If you need to do upsampling you need to define the inverse of upsampling rate. E.g. if the number of samples is 6 and the resampling rate is 0.5, the output will have 12 samples per symbol.

Return values

obj	An instance of the class ResampleSkewJitter_v1

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

• library/ResampleSkewJitter_v1.m