Figure 16 and 17 show continuous time signals obtained by the convolution of reference signals, i.e. X and Y with the defining signals respectively. The magnitude of central samples (say at 100 in Figs. 16 and 17) in the convolved waveform can act as signature in detection process. These two sets of quadsignatures are used by ML detector for estimation of data
transmitted by seeking these signatures out of received signal to estimate the transmitted CP symbol based upon suitable
thresholds in case of BCPM, QCPM or 8CPM.