Performance Analysis of Multi-Aperture Coherent Optical Receiver for Satellite-to-Ground Downlink

Xiaoyu Zhang; Sheng Cui; Deming Liu; Yang Jiang

doi:10.3788/LOP56.210101

Journals >Laser & Optoelectronics Progress >Volume 56 >Issue 21 >Page 210101 > Article

Laser & Optoelectronics Progress
Vol. 56, Issue 21, 210101 (2019)

Performance Analysis of Multi-Aperture Coherent Optical Receiver for Satellite-to-Ground Downlink

Xiaoyu Zhang¹, Sheng Cui^2、*, Deming Liu², and Yang Jiang^1、**

Author Affiliations

¹College of Physics, Guizhou University, Guiyang, Guizhou 550025, China

²School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China

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DOI: 10.3788/LOP56.210101 Cite this Article Set citation alerts

Xiaoyu Zhang, Sheng Cui, Deming Liu, Yang Jiang. Performance Analysis of Multi-Aperture Coherent Optical Receiver for Satellite-to-Ground Downlink[J]. Laser & Optoelectronics Progress, 2019, 56(21): 210101 Copy Citation Text

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Fig. 1. Structure diagram of multi-aperture coherent optical receiver for downlink free space optical (FSO)communication

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Fig. 2. Relationship between average received power and BER for EGC coherent point receiver model under clean air condition in weak turbulence

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Fig. 3. Relationship between average received power and BER for EGC coherent point receiver modelunder clean air condition in strong turbulence

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Fig. 4. Relationship between receiving antenna diameter D and Rytov variance σR2

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Fig. 5. Relationship between average received power and BER for L-channel EGC coherent optical receiver model with diameter of D under different fog conditions in weak turbulence. (a) Clean air; (b) light fog; (c) moderate fog; (d) thick fog; (e) dense fog

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Fig. 6. Relationship between average received power and BER for L-channel with EGC coherent optical receiver model with diameter of D under different fog conditions in strong turbulence. (a) Clean air; (b) light fog; (c) moderate fog; (d) thick fog; (e) dense fog

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Type of fog	Visibility /m	Transmittance h_l
Light fog	1000	0.94
Moderate fog	500	0.85
Thick fog	250	0.67
Dense fog	70	0.36

Table 1. Weather condition parameters for 1550-nm wavelength signal

Parameter	Value
Height from receiver to ground h₀ m	0
Satellite altitude H/km	38000
Wavelength λ/nm	1550
Wind velocity ω/(m·s^-1)	21
Refractive index parameter A₀/(10^-14m^-2/3)	1.7
Zenith angle ζ	0-π/2

Table 2. Simulation parameters of satellite-to-ground downlink

Turbulence condition	Average received power /dBm
Turbulence condition	L=1, Aperturearea of A	L=2, Aperturearea of A/2	L=3, Aperturearea of A/3	L=4, Aperturearea of A/4
Weak turbulence	-45.60	-46.89(1.29)	-47.41(1.81)	-47.52(1.92)
Strong turbulence	-26.85	-37.64(10.79)	-41.13(14.28)	-42.72(15.87)

Table 3. Sensitivity for coherent point receiver model under clean air condition in weak turbulence and strong turbulence (BER is 10-6)

Turbulencecondition	Weathercondition	Sensitivity /dBm
Turbulencecondition	Weathercondition	L=1, D=12 cm	L=2, D=6 $\begin{matrix} \sqrt[]{2} \end{matrix}$ cm	L=3, D=4 $\begin{matrix} \sqrt[]{3} \end{matrix}$ cm	L=4, D=6 cm
Weakturbulence	Clear air	-47.25	-50.60(3.35)	-52.45(5.20)	-53.87(6.62)
	Light fog	-46.96	-50.35(3.39)	-52.29(5.33)	-53.58(6.62)
	Moderate fog	-46.57	-49.89(3.32)	-51.80(5.23)	-53.19(6.62)
	Thick fog	-45.54	-48.88(3.34)	-50.77(5.23)	-52.13(6.59)
	Dense fog	-42.82	-46.21(3.39)	-48.07(5.25)	-49.43(6.61)
Strongturbulence	Clear air	-32.54	-42.52(9.98)	-46.86(14.32)	-49.39(16.85)
	Light fog	-32.27	-42.24(9.97)	-46.61(14.34)	-49.12(16.85)
	Moderate fog	-31.83	-41.79(9.96)	-46.17(14.34)	-48.69(16.86)
	Thick fog	-30.80	-40.76(9.96)	-45.13(14.33)	-47.65(16.85)
	Dense fog	-28.10	-38.08(9.98)	-42.43(14.33)	-44.95(16.85)

Table 4. Sensitivity for L-channel coherent optical receiver model with diameter of D under different fog conditions in weak turbulence and strong turbulence (BER is 10-6)

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