Liang Ding, Zhiyong Wu, Yucong Gu, Zechao Gao, Jintian Hu, Shuang Ma. Key Technologies of Wireless Laser and Radio Frequency Complementary Communication System[J]. Laser & Optoelectronics Progress, 2019, 56(6): 060004
- Laser & Optoelectronics Progress
- Vol. 56, Issue 6, 060004 (2019)
Fig. 1. Block diagram of FSO and RF complementary communication system
Fig. 2. Schematic of hard switching
Fig. 3. Operation under dual FSO threshold
Fig. 4. Operation regions under dual FSO threshold
Fig. 5. Flow chart of time hysteresis algorithm
Fig. 6. Flow chart of power hysteresis algorithm
Fig. 7. Performance of trend prediction algorithm. (a) Reactive trend; (b) proactive trend
Fig. 8. Block diagram of switching system based on RMS detector
Fig. 9. Schematic of soft switching
Fig. 10. Soft-switching complementary communication system based on packet-level Raptor codes
Fig. 11. Laser communication link with adaptive optics compensation
Fig. 12. Structural diagram of optical modem
Fig. 13. Effect of OAGC on eye diagram of FSO link signal. (a) Without OAGC; (b) with OAGC
Fig. 14. Block diagram of DFE
Fig. 15. System performances before and after equalization. (a) Before equalization; (b) after equalization
Fig. 16. Improvement in SNR after adopting DFE. (a) Before equalization; (b) after equalization
Fig. 17. Optical windows
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Table 1. Key parameters of switching system based on RMS power detector
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Table 2. Characteristic analysis of main switching algorithms in complementary communication system
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Table 3. Performance comparison of systems with and without adaptive optics compensation under strong turbulence(
Cn2=1.45×10-14)
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