Hadamard-Walsh functions are binary orthogonal sequences, with power-of-two
lengths. They can be generated by the recursion
and M is a power of two. The rows of any instance form a mutually
orthogonal set over the inner product.
The sequences of order 8, for example, are:
The Walsh functions of order 64 are used as orthogonal cover
on the forward link channels. They are also used as orthogonal
modulation symbols in the reverse link. Although the functions
are the same, they are used for entirely different purposes
in the forward and reverse links.
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