PulseShaper_v1 Class Reference

Pulse shaper. More...

Inherits unit.

Public Member Functions
function	PulseShaper_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.

Static Public Member Functions
static function	ps (in in, in samplesPerSymbol, in filterCoeffs)
	Class traverse function.

Public Attributes
Property	nOutputs
	Number of outputs.
Property	nInputs
	Number of inputs.
Property	samplesPerSymbol
	Output samples per symbol.
Property	symbolRate
	Output sample rate (Does not need to be defined) [Default 1].
Property	pulseShape
	Pulse shaping.
Property	filterSymbolLength
	Symbol length of Raised Cosine or Root Raised Cosine filters.
Property	rollOff
	Rolloff for Raised Cosine or Root Raised Cosine filters.
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.

Private Attributes
Property	filterCoeffs
	Filter Coefficients.

Detailed Description

Pulse shaper.

This function converts the input signal in an upsampled pulse shaped signal.

Observations

The input signal shall be an 1 sample per symbol complex signal_interface signal.

'rc' - Raised Cosine, a.k.a. Nyquist Shaping (when using rollOff = 0). 'rrc' - Root Raised Cosine. 'nrz' - Non Return to Zero. 'rz33' - Return to Zero with 1/3 duty cycle. 'rz50' - Return to Zero with 1/2 duty cycle. 'rz66' - Return to Zero with 2/3 duty cycle.

Example

param.ps.samplesPerSymbol = 8;
param.ps.pulseShape = 'rz33';
pulseshaper = PulseShaper_v1(param.quantizer);

param.sig.Fs = 32e9;
param.sig.Fc = 0;
param.sig.Rs = 32e9;
param.sig.PCol = [pwr(20,{-2,'dBm'}), pwr(-inf,{-inf,'dBm'})];
Ein = upsample((randi(2,10000,1)-1.5)*2 + 1j*(randi(2,10000,1)-1.5)*2,2);
sigIn = signal_interface(Ein, param.sig);

sigOut = pulseshaper.traverse(sigIn);

Advanced Example

param.ps.samplesPerSymbol = 8;
param.ps.pulseShape = 'rc';
param.ps.rollOff = 0.1;
param.ps.filterSymbolLength = 101;
pulseshaper = PulseShaper_v1(param.quantizer);

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(2,10000,1)-1.5)*2 + 1j*(randi(2,10000,1)-1.5)*2,2);
sigIn = signal_interface(Ein, param.sig);

sigOut = pulseshaper.traverse(sigIn);

Author

Júlio Diniz

Version

2

Definition at line 56 of file PulseShaper_v1.m.

Constructor & Destructor Documentation

function PulseShaper_v1::PulseShaper_v1

(

in

param

)

Class constructor.

Parameters

param.samplesPerSymbol	SamplesPerSymbol - It is the desired output number of samples per symbol.
param.pulseShape	PulseShape - Choose among 'rc', 'rrc', 'rz33', 'rz50', 'rz67', 'nrz' or 'custom';
param.filterCoeffs	FilterCoeffs - You should define this as a vector if you chose 'custom' 'pulseShape'.
param.filterSymbolLength	FilterSymbolLength - You should define a symbol length for 'rc' or 'rrc' filters. The default value is 202.
param.rollOff	RollOff - The Roll-Off factor. You should define this value if you are using 'rc' or 'rrc' shapings. Usually, this number varies from 0 to 1.
param.symbolRate	SymbolRate - You are able to define a symbol rate for your signal here. The output sample frequency will be define as symbolRate*samplesPerSymbol.

Return values

obj	An instance of the class PulseShaper_v1.

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

• library/tx/PulseShaper_v1.m