timeresp - Calculate time response for model object
Syntax
[y,t] = timeresp(h,u,ts)
Description
[y,t] = timeresp(h,u,ts) computes
the output signal, y, that the rfmodel object, h,
produces in response to the given input signal, u.
The input h is the handle of a model object. ts is
a positive scalar value that specifies the sample time of the input
signal.
The output y is the output signal. RF Toolbox software
computes the value of the signal at the time samples in the vector t using
the following equation.
where
and A, C, D,
and Delay are properties of the rfmodel.rational object, h.
Examples
The following example shows you how to compute the time response
of the data stored in the file default.s2p by fitting
a rational function model to the data and using the timeresp method
to compute the time response of the model.
% Define the input signal
SampleTime = 2e-11;
OverSamplingFactor = 25;
TotalSampleNumber = 2^12;
InputTime = double((1:TotalSampleNumber)')*SampleTime;
InputSignal = sign(randn(1, ...
ceil(TotalSampleNumber/OverSamplingFactor)));
InputSignal = repmat(InputSignal, [OverSamplingFactor, 1]);
InputSignal = InputSignal(:);
% Create a rational function model
orig_data=read(rfdata.data,'default.s2p');
freq=orig_data.Freq;
data=orig_data.S_Parameters(2,1,:);
fit_data=rationalfit(freq,data);
% Compute the time response
[y,t]=timeresp(fit_data,InputSignal,SampleTime);
See Also
 | smith | | write |  |
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