In mathematics, a Walsh matrix is a specific square matrix, with dimensions a power of 2, the entries of which are +1 or -1, and the property that the dot product of any two distinct rows (or columns) is zero.
In mathematics, a Walsh matrix is a square matrix, with dimensions a power of 2, the entries of which are +1 or -1. Since a Walsh matrix can be obtained from Hadamard matrix solely by exchanging rows it retains the property that the dot product of any two distinct rows (or columns) is zero.