Simulation and Experimental Research of Multimodulation Format Compatible Space Laser High-Speed Communication Modulation

He Zhao; Peng Zhang; Zhiqun Yang; Ju Ouyang; Dongsheng Tian; Zhuang Liu; Dashuai Wang; Huilin Jiang

doi:10.3788/CJL202149.0706004

Chinese Journal of Lasers, Volume. 49, Issue 7, 0706004(2022)

Simulation and Experimental Research of Multimodulation Format Compatible Space Laser High-Speed Communication Modulation

He Zhao¹, Peng Zhang^1,2、*, Zhiqun Yang³, Ju Ouyang¹, Dongsheng Tian¹, Zhuang Liu¹, Dashuai Wang², and Huilin Jiang¹

Author Affiliations

¹School of Electro-Optical Engineering, Changchun University of Science and Technology, Changchun, Jilin 130012, China

²School of Electronic Information Engineering, Changchun University of Science and Technology, Changchun, Jilin 130012, China

³School of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, China

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Figures & Tables(16)

Fig. 1. Structure of multi-modulator-format compatible transmitter

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Fig. 2. Schematic of IQ modulator (including differential encoder)

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Fig. 3. Schematic of muti-modulation format compatible transmitter system simulation

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Fig. 4. Simulation results of OOK format. (a) Spectrum of single I(Q) path; (b) IQ-modulator output spectrum；(c) eye diagram after data recovery of OOK format

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Fig. 5. Simulation results of BPSK format. (a) Eye diagram; (b) constellation diagram

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Fig. 6. Simulation results of QPSK format. (a) Eye diagram; (b) constellation diagram

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Fig. 7. Simulation results of DPSK and DQPSK formats. (a) Eye diagram of DPSK format; (b) eye diagram of DQPSK format

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Fig. 8. Block diagram of experimental system

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Fig. 9. Physical map of experimental system

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Fig. 10. Test results of different modulation formats. (a) Eye diagram of OOK modulation format; (b) constellation diagram of BPSK modulation format; (c) constellation diagram of QPSK modulation format; (d) constellation diagram of PM-DQPSK modulation format

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Fig. 11. Sensitivity curves of PM-DQPSK modulation format at different communication rates

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Table 1. BPSK modulation information
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Table 1. BPSK modulation information
Electrical signal Q_k＝0 Q_k＝1
I_k＝0 Φ ＝ π/4 -
I_k＝1 - Φ＝π＋π/4

Table 2. QPSK modulation information
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Table 2. QPSK modulation information
Electrical signal Q_k＝0 Q_k＝1
I_k＝0 Φ＝ π/4 Φ＝3π/4
I_k＝1 Φ＝7π/4 Φ＝5π/4

Table 3. Simulation results of different modulation formats
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Table 3. Simulation results of different modulation formats
Modulation format Q EVM /%
OOK 35.15 －
BPSK 13.68 10.33
QPSK 8.93 15.57
DPSK 15.98 8.85
DQPSK 10.24 14.76

Table 4. Experimental results of different modulation formats
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Table 4. Experimental results of different modulation formats
Modulation format Q EVM /%
OOK 19.2351 -
BPSK 18.5422 10.79
QPSK 15.6265 12.80
PM-DQPSK 13.5421 14.77

Table 5. Communication rates corresponding to transmission rates for five formats　unit：Gbit/s
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Table 5. Communication rates corresponding to transmission rates for five formats　unit：Gbit/s
Modulation format 2.5 GBaud 5 GBaud 10 GBaud
OOK 2.5 5 10
BPSK/DPSK 2.5 5 10
QPSK 5 10 20
PM-DQPSK 10 20 40

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He Zhao, Peng Zhang, Zhiqun Yang, Ju Ouyang, Dongsheng Tian, Zhuang Liu, Dashuai Wang, Huilin Jiang. Simulation and Experimental Research of Multimodulation Format Compatible Space Laser High-Speed Communication Modulation[J]. Chinese Journal of Lasers, 2022, 49(7): 0706004

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