Figure 3
From: Orthogonal-band-multiplexed offset-QAM optical superchannel generation and coherent detection
OBM-OQAM receiver scheme.
(a) Receiving principle. Since the subbands are orthogonal to each other, we can use a down-convertor and a matched filter to demodulate the signal. Two detection scheme: (b) full-band detection: Treat the superchannel as an OFDM/OQAM signal and perform full-band receiving with the help of FFT module and frequency domain equalization; and (c) detection of only one or several subbands with conventional MC-OQAM receiver.
