New square wave transform for digital signal processing
John Pender, David N. Covey · IEEE Transactions on Signal Processing · 1992
A novel transform for spectral decomposition that uses regular square waves as the basis functions is presented. The digital transform requires order N operations. The transform possesses unusually symmetry properties which may prove useful in many applications. In particular, it can act as a generalized frequency filter that only depends on the periodicity of the data.>