System object: comm.WalshCode
Generate Walsh code from orthogonal set of codes
Y = step(H)
Y = step(H) outputs a frame of the Walsh code in column vector Y. Specify the frame length with the SamplesPerFrame property. The Walsh code corresponds to a row of an NxN Hadamard matrix, where N is a nonnegative power of 2 that you specify in the Length property. Use the Index property to choose the row of the Hadamard matrix. The output code is in a bi-polar format with 0 and 1 mapped to 1 and -1 respectively.
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.