Chinese Optics Letters, Volume. 23, Issue 5, 050602(2025)
Multiplier-free QPSK phase recovery for coherent intersatellite optical wireless communication
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Fig. 3. Simulation and experimental framework. OBPF, optical band-pass filter.
Fig. 7. Phase tracking performance of the proposed algorithm (right).
Fig. 9. BER performance under different smooth filters and tracking steps (Eb/N0 = 8 dB).
Table 1. Key System Parameters
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Parameter Value Code pattern PRBS 15 Modulation format QPSK Symbol rate 2.5 G Symbols/s Low-pass filter (LPF) bandwidth (3 dB) 4360 MHz ADC sample rate 10 GS/s ADC resolution 8 bit Wavelength 1540.56 nm Tx or Rx external cavity laser (ECL) power 10 dBm Tx or Rx ECL linewidth ≤ 10 kHz EDFA noise figure 4 dB Simulation residual frequency 200 kHz Simulation symbol numbers 30,000,000 symbols
Table 2. Computational Load Comparison
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Algorithm Real multiplier Real adder Simple adder V&V 8N 6N−1 0 Ref. [ 16 ]0 13N−1 0 Ref. [ 19 ]0 2N−1 0 Proposed 0 N N−1
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Yanhao Chen, Qianwu Zhang, Yuanzhe Qu, Kun Chen, Zhengjun Xu, Yingchun Li, Jian Chen, Junjie Zhang, "Multiplier-free QPSK phase recovery for coherent intersatellite optical wireless communication," Chin. Opt. Lett. 23, 050602 (2025)
Paper Information
Category: Fiber Optics and Optical Communications
Received: Aug. 1, 2024
Accepted: Dec. 6, 2024
Published Online: May. 9, 2025
The Author Email: Qianwu Zhang (zhangqianwu@shu.edu.cn), Junjie Zhang (zjj@staff.shu.edu.cn)
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