Acta Optica Sinica, Volume. 42, Issue 24, 2425001(2022)
Large-Scale Multi-Antenna and One-Receiver GNSS-over-Fiber Differential Positioning System Using Silicon On-Chip Optical Routing
Figures & Tables(14)
Fig. 1. Large-scale multi-antenna and one-receiver GNSS-over-fiber differential positioning system using silicon on-chip optical-routing
Fig. 3. Structure of 1×8 silicon optical switch chip. (a) Topological structure; (b) unit structure of MZI optical switch
Fig. 4. Fabricated 1×8 silicon optical switch chip. (a) Optical microscope image; (b) packaged physical drawing
Fig. 5. Design diagram of one channel for multi-channel numerical control voltage source
Fig. 6. Measured transmission spectra of optical switch chip channels. (a) I-O1; (b) I-O2; (c) I-O3; (d) I-O4; (e) I-O5; (f) I-O6
Fig. 7. Result of switching speed of optical switching chip. (a) Rising edge; (b) falling edge
Fig. 9. Layout of experiment. (a) Distribution of outdoor remote GNSS points; (b) picture of photonic radio frequency front end; (c) experimental setup of indoor local end; (d) inside view of silicon optical switch chip packaged module
Fig. 10. Baseline lengths of five monitoring points. (a) Measured baseline lengths for five GNSS antennas in chronological order; (b) monitoring point 1; (c) monitoring point 2; (d) monitoring point 3; (e) monitoring point 4; (f) monitoring point 5
Fig. 11. CNR of G02, G05, C10 and C13 satellites corresponding to five monitoring points
Table 1. Parameter definition of carrier phase observation equation
View tableTable 1. Parameter definition of carrier phase observation equation
Parameter Definition Carrier phase observation from antenna i to satellite u Carrier wavelength with satellite frequency L1 Geometric distance from antenna i to satellite u Clock difference of antenna i received by receiver Clock difference of satellite u Ephemeris error of satellite u Integer ambiguity of carrier phase in process of satellite u transmitting to antenna i Ionosphere deviation from satellite u to antenna i Tropospheric deviation from satellite u to antenna i Carrier phase observation noise from satellite u to antenna i Delay of antenna i after introducing optical fiber
Table 2. Test voltage of chip channel
View tableTable 2. Test voltage of chip channel
Channel（port） CH 1 /V CH 2 /V CH 3 /V E1-E2-E4（I-O1） 3.99 5.89 7.80 E1-E2-E4（I-O2） 4.29 5.79 4.80 E1-E2-E5（I-O3） 3.99 8.29 7.50 E1-E2-E5（I-O4） 4.09 8.29 7.50 E1-E3-E6（I-O5） 7.39 8.19 7.70 E1-E3-E6（I-O6） 7.39 8.19 4.70 E1-E3-E7（I-O7） 7.29 5.59 8.00 E1-E3-E7（I-O8） 7.69 5.59 5.00
Table 3. Mean value and standard deviation in E, N and U directions of monitoring point 1 to 5
View tableTable 3. Mean value and standard deviation in E, N and U directions of monitoring point 1 to 5
Monitoring point No. Index E direction N direction U direction Base length 1 Mean value /m +25.590 +14.133 +0.034 29.233 Standard deviation /mm 3.5 2.4 3.4 3.1 2 Mean value /m +34.129 +2.723 -0.037 34.238 Standard deviation /mm 2.5 1.3 1.8 1.5 3 Mean value /m +16.910 +6.129 +0.207 17.987 Standard deviation /mm 2.4 2.1 3.5 2.7 4 Mean value /m +10.672 +5.721 +0.334 11.790 Standard deviation /mm 3.0 2.8 1.7 1.9 5 Mean value /m +35.172 +4.884 -1.195 35.559 Standard deviation /mm 1.7 2.7 2.4 2.5
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Wu Xu, Xihua Zou, Peixuan Li, Linjie Zhou, Wei Pan, Lianshan Yan, Yang Li, Di Zheng, Yongliang Peng. Large-Scale Multi-Antenna and One-Receiver GNSS-over-Fiber Differential Positioning System Using Silicon On-Chip Optical Routing[J]. Acta Optica Sinica, 2022, 42(24): 2425001
Paper Information
Category: OPTOELECTRONICS
Received: May. 17, 2022
Accepted: Jun. 20, 2022
Published Online: Dec. 14, 2022
The Author Email: Li Peixuan (lipeixuan@swjtu.edu.cn)
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