Resample_v1 Class Reference

Resampling. More...

Inherits unit.

Public Member Functions
function	Resample_v1 (in params)
	Class constructor. More...
function	traverse (in obj, in sig)
	main
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	resampler (in in, in Fs, in Fs_new, in Fb)
	Resample using Gardner. More...
static function	FindRes (in var, in nom_v, in in, in t_new, in L)
	Gardner error detector. More...
static function	splineResampler (in in, in Fs, in Fs_new)

Public Attributes
Property	nInputs
	Number of inputs.
Property	nOutputs
	Number of outputs.
Property	method
	method {'matlab' | 'gardner' | 'spline'}
Property	newFs
	Sampling frequency of output signal (Hz)
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

Resampling.

RESAMPLER resamples the signal. Use normal and fast matlab (arbitrary clock phase), a clock phase based on the Gardner estimate, or spline interpolation

Author

Miguel Iglesias Olmedo

Version

1

Definition at line 14 of file Resample_v1.m.

Constructor & Destructor Documentation

function Resample_v1::Resample_v1

(

in

params

)

Class constructor.

Parameters

param.method	Resampling method ['matlab' | 'gardner'|'spline']; [default spline]
param.newFs	New sampling frequency [Hz]

Member Function Documentation

static function Resample_v1::FindRes ( in  var, in  nom_v, in  in, in  t_new, in  L  )

static

Gardner error detector.

Calculates Gardner error term for signal

Parameters

var	test timing offsets to try
nom_v	approximate number of samples per symbol
in	input signal
t_new	vector of time to interpolate to (?)
L	length of signal to consider

Return values

PD_gardner

error detector output

static function Resample_v1::resampler ( in  in, in  Fs, in  Fs_new, in  Fb  )

static

Resample using Gardner.

Resamples signal using clock phase as determined by the Gardner timing error detector. This is calculated by averaging over the first 10^4 samples, so if there is clock skew, it will be incorrect at the end of the signal. Interpolation is performed using a cubic spline.

Parameters

in	input signal
Fs	sampling frequency of input signal
Fs_new	sampling frequency of output signal
Fb	symbol rate

Return values

out	resampled output
PD_gardner	error detector output

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

• library/rx/DSP/Resample_v1.m