The TT-transform stands for time-time transform and has been derived as
an inverse Fourier transform of the time-frequency S-transform. So far, it has been
proposed that the diagonal of the TT-transform can be used for signal characterisation.
We show here an alternative and simplified derivation of the TT-transform
which enables a better understanding of this transform.
Simon, C.; Dañobeitia, J.; Mànuel, A. The diagonal of the TT transform: computation and meaning. "Instrumentation viewpoint", 01 Novembre 2009, núm. 8, p. 60.