Fig. 1. Schematic of vector mm-wave signal generation based on push-pull modulator. (a) Baseband signal spectrum diagram; (b) simplified optical spectra detected after ECL; (c) simplified optical spectra detected after push-pull modulator; (d) simplified optical spectra detected after optical filter; (e) carrier signal suppressed by optical filter

Fig. 2. MI curves and constellation diagrams. (a) 8PSK/GS-8PSK; (b) 8QAM/GS-8QAM; (c) 16QAM/GS-16QAM

Fig. 3. Generation and transmission simulation system of 80 GHz vector mm-wave signal

Fig. 4. VPI simulation results. (a) R signal spectrum; (b) signal spectrum after push-pull modulator; (c) signal spectrum after FBG filter; (d) signal spectrum after PD

Fig. 5. Received 8PSK/GS-8PSK constellations at the baud rate of 8-Gbaud. 8PSK: (a) After down conversion and resample; (b) after GSOP; (c) after CMMA equalization; (d) after frequency-offset estimation and carrier phase estimation. GS-8PSK: (e) after down conversion and resample; (f) after GSOP; (g) after CMMA equalization; (h) after BPS

Fig. 6. Relationship between signal BER of 8-Gbaud 8PSK/GS-8PSK and input optical power into PD

Fig. 7. Bit error rate curves of 8-Gbaud 8PSK/GS-8PSK signal after transmitting 150 km SMF and constellation diagrams. (a) Constellation of 8PSK signal after carrier phase estimation; (b) constellation of GS-8PSK signal after BPS

Fig. 8. Relationship between signal BER of 16-Gbaud 8QAM/GS-8QAM and input optical power into PD