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System object: comm.RectangularQAMTCMModulator
Package: comm

Convolutionally encode binary data and map using rectangular QAM constellation


Y = step(H,X)
Y = step(H,X,R)



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) convolutionally encodes and modulates the input data numeric or logical column vector X, and returns the encoded and modulated data, Y. X must be 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, X, must be K×L, for some positive integer L. The step method outputs a complex column vector, Y, of length L.

Y = step(H,X,R) resets the encoder of the rectangular QAM TCM modulator object to the all-zeros state when you input a non-zero reset signal, R. R must be a double precision or logical, scalar integer. This syntax applies when you set the ResetInputPort property to true.


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. For more information on changing property values, see System Design in MATLAB Using System Objects.