Laser & Optoelectronics Progress, Volume. 58, Issue 23, 2306004(2021)
Analysis of Geometric Shaping Performance of a Vector Millimeter Wave Signal
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
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Jun Liu, Feng Zhao, Jiaxin Meng, Yi Wei, Changpeng Jiang, Fanyun Wang. Analysis of Geometric Shaping Performance of a Vector Millimeter Wave Signal[J]. Laser & Optoelectronics Progress, 2021, 58(23): 2306004
Category: Fiber Optics and Optical Communications
Received: Feb. 1, 2021
Accepted: Apr. 9, 2021
Published Online: Nov. 18, 2021
The Author Email: Zhao Feng (hfengzhao@xupt.edu.cn)