The dual L-class of time-frequency distributions (TFDs) is introduced. A ne
w class of TFDs is derived in which dual L-Wigner distribution (DLWD) is ge
neralised by an approach similar to the Cohen class or the L-class of TFDs
are generalised from the Wigner distribution (WD) and the L-Wigner distribu
tion (LWD), respectively. The WD, LWD and DLWD are demonstrated by using an
example in which a two-component synthetic signal is analysed.