step

System object: comm.GeneralQAMTCMModulator
Package: comm

Convolutionally encode binary data and map using arbitrary QAM constellation

Syntax

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

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)` convolutionally encodes and modulates the input data, `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 general 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.

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