Fig. 1. Schematic diagram of the proposed FDSP scheme in the DMT transmission system.

Fig. 2. (a) Experimental setup. Insets are (b) the output power versus bias current and (c) the spectrum of the received DMT signal.

Fig. 3. SNR performance versus bias current for different IFFT sizes.

Fig. 4. BER performance versus bias current for different IFFT sizes.

Fig. 5. BER performance versus number of ISFA taps for different IFFT sizes.

Fig. 6. SC SNR for conventional DMT signals: (a) without TD-CLC; (b) with TD-CLC.

Fig. 7. Estimated SC SNR for three kinds of DMT signal schemes.

Fig. 8. Recovered 16QAM constellations and their EVM values: (a) conventional without ISFA; (b) conventional with ISFA; (c) FDSP without ISFA; (d) FDSP with ISFA; (e) PDSP without ISFA; (f) PDSP with ISFA.

Fig. 9. BER performance versus bias current for different DMT signals.