Y = step(H,X)
Y = step(H,X) outputs the upsampled and interpolated values, Y , of the input signal X . A K-by-N input matrix is treated as N independent channels. The FIR interpolator object interpolates each channel over the first dimension and generates a M-by-N output matrix, where M is the product of K and the upsampling factor, L.
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.