Class of nonorthogonal transformations for signal processing
R.C. French, R.F. Mitchell · Electronics Letters · 1974
A class of nonorthogonal transformations is described in which the reference waveforms are circularly shifted versions of a single sequence. The sequence must have a 2-level auto-correlation functton: Barker and pseudonoise sequences are examples. The transformation is believed to have applications in impulsive-noise reduction.