System object: comm.ConvolutionalEncoder
Package: comm
Convolutionally encode binary data
Y = step(H,X)
Y = step(H,X,INITSTATE)
Y = step(H,X,R)
[Y,FSTATE] = step(H,X)
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) encodes the binary data, X, using the
convolutional encoding that you specify in the TrellisStructure
property. It returns the encoded data, Y. Both X
and Y are column vectors of data type numeric, logical, or unsigned
fixed point of word length 1 (fi object). When the convolutional
encoder represents a rate K/N code, the length of
the input vector equals KL, for some positive integer, L.
The step method sets the length of the output vector, Y, to
LN.
Y = step(H,X,INITSTATE) uses the initial state specified in the
INITSTATE input when you set the TerminationMethod property to 'Truncated' and the InitialStateInputPort property to true.
INITSTATE must be an integer scalar.
Y = step(H,X,R) resets the internal states of the encoder when you input
a non-zero reset signal, R. R must be a double
precision or logical scalar. This syntax applies when you set the TerminationMethod
property to Continuous and the ResetInputPort property to
true.
[Y,FSTATE] = step(H,X) returns the final
state of the encoder in the integer scalar output FSTATE when
you set the FinalStateOutputPort property to true.
This syntax applies when you set the TerminationMethod property
to Continuous or Truncated.
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 (MATLAB) 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.