Y = step(H,X)
Y = step(H,X) outputs the filtered and downsampled values, Y, of the input signal, X. A Ki-by-N input matrix is treated as N independent channels. The length of each column must be a multiple of the DecimationFactor property value. The FIR decimator operates on each channel separately and generates a Ko-by-N output matrix where Ko = Ki/M with M the decimation factor. The object supports real and complex floating-point and fixed-point inputs, except for complex unsigned fixed-point inputs.
Note: The object performs an initialization the first time the step method is executed. This initialization locks nontunable properties 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.