Fig. 1. Composition and structure of CO-FBMC/OQAM system

Fig. 2. Schematic of the frame and the designed preamble structure in CO-FBMC/OQAM system

Fig. 3. Numerical simulation configuration and spectra of CO-FBMC/OQAM system

Fig. 4. (a) Relative estimated errors of four preambles in back-to-back scenario; (b) EVM value versus laser frequencyoffset in back-to-back scenario (TS4, OSNR at receiver is 20 dB)

Fig. 5. BER performance versus OSNR of CO-FBMC/OQAM system with different laser frequency offsets (a) in back-to-back scenario and (b) after 1500 km transmission; (c) OSNR penalty required at RBE=4×10-3 after 1500 km transmission versus different laser frequency offsets

Fig. 6. Constellations of demodulated signals with different laser frequency offsets after 1500 km transmission at OSNR of 21 dB. (a) CFO is 1 MHz; (b) CFO is 3 MHz; (c) CFO is 5 MHz