System object: comm.PhaseFrequencyOffset
Package: comm
Apply phase and frequency offsets to input signal
Y = step(H,X)
Y = step(H,X,FRQ)
Note
Starting in R2016b, instead of using the step method to perform the operation defined by the System object™, you can call the object with arguments, as if it were a function. For example, y = step(obj,x) and y = obj(x) perform equivalent operations.
Y = step(H,X) applies phase and frequency
offsets to input X, and returns Y.
The input X is a double or single precision matrix X,
of dimensions MxN. M is the number of time samples in the input signals
and N is number of channels. Both M and N can be equal to 1. The object
adds phase and frequency offsets independently to each column of X.
The data type and dimensions of X and Y are
the same.
Y = step(H,X,FRQ) uses FRQ as
the frequency offset that the object applies to input X when
you set the FrequencyOffsetSource property to 'Input
port'. When the X input is an MxN matrix, the value
for FRQ can be a numeric scalar, an Mx1 or 1xN
numeric vector, or an MxN numeric matrix. When the FRQ input
is a scalar, the object applies a constant frequency offset, FRQ,
to each column of X. When the FRQ input
is an Mx1 vector, the object applies time varying frequency offsets,
which are specified in the FRQ vector, to each
column of X. When the FRQ input
is a 1xN vector, the object applies the ith constant frequency offset
in FRQ to the ith column of X.
When the FRQ input is an MxN matrix, the object
applies the ith time varying frequency offsets, specified in the ith
column of FRQ, to the ith column of X.
Note
obj specifies the System object on
which to run this step method.
The object performs an initialization the first time the step method
is executed. This initialization locks nontunable
properties and input specifications, such as dimensions,
complexity, and data type of the input data. If you change a nontunable
property or an input specification, the System object issues an
error. To change nontunable properties or inputs, you must first call
the release method to unlock the object.