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System object: comm.ThermalNoise
Package: comm

Add receiver thermal noise


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) adds thermal noise to the complex, baseband input signal, X, and outputs the result in Y. The input signal X must be a complex, double or single precision data type column vector or scalar.


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.