System object: comm.DifferentialDecoder
Package: comm

Decode binary signal using differential decoding


Y = 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) decodes the differentially encoded input data, X, and returns the decoded data, Y. The input X must be a column vector of data type logical, numeric, or fixed-point ( objects). Y has the same data type as X. The object treats non-binary inputs as binary signals. The object computes the initial output value by performing an Xor operation of the value in the InitialCondition property and the first element of the vector you input the first time you call the step method.


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.