step
System object: phased.LCMVBeamformer
Namespace: phased
Perform LCMV beamforming
Syntax
Y = step(H,X)
Y = step(H,X,XT)
[Y,W] = step(___)
Description
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)
performs LCMV beamforming
on the input, X
, and returns the beamformed output
in Y
. X
is an M-by-N matrix
where N is the number of elements of the sensor array. Y
is
a column vector of length M.
The size of the first dimension of the input matrix can vary to simulate a changing signal length. A size change can occur, for example, in the case of a pulse waveform with variable pulse repetition frequency.
Y = step(H,X,XT)
uses XT
as
the training samples to calculate the beamforming weights. This syntax
is available when you set the TrainingInputPort
property
to true
. XT
is a P-by-N matrix,
where N is the number of elements of the sensor array. P must be greater
than N.
The size of the first dimension of the input matrix can vary to simulate a changing signal length. A size change can occur, for example, in the case of a pulse waveform with variable pulse repetition frequency.
[Y,W] = step(___)
returns the
beamforming weights W
. This syntax is available
when you set the WeightsOutputPort
property to true
. W
is
a column vector of length N, where N is the number of elements in
the sensor array.
Note
The object performs an initialization the first time the object 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.