Fig. 1. Schematic of the proposed optical remote heterodyne SSB-OFDM-RoF link based on the KK receiver. S/P, serial-to-parallel; P/S, parallel-to-serial; DAC, digital-to-analog converter; PC, polarization controller; OC, optical coupler; OS, optical splitter; EDFA, erbium-doped optical fiber amplifier; ADC, analog-to-digital converter.

Fig. 2. Signal processing flow of the KK receiver. The baseband signal can be extracted from the RF signal by the KK receiver; meanwhile, the SSBI is effectively eliminated.

Fig. 3. SNR versus the CSPR, where the launch power remains constant and the ROP is fixed at 0 dBm for B2B transmission.

Fig. 4. BER versus ROP with different laser linewidths for 16-QAM and 64-QAM signals after 75 km SSMF transmission.

Fig. 5. BER versus ROP curves with different SSMF lengths with and without CDC for 16-QAM signal.

Fig. 6. BER performance comparison of the KK scheme and mixer-based scheme with 94 Gb/s 16-QAM SSB-OFDM signal. Constellation diagrams for the mixer-based scheme with CSPR of (a) 7 dB, (c) 11 dB, (e) 15 dB, and KK scheme with CSPR of (b) 7 dB, (d) 11 dB, (f) 15 dB at ROP of −5  dBm.

Fig. 7. BER versus ROP with different ENOBs of DAC and ADC.