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20 April 2023 Channel equalization based on time domain spreading of Gaussian optical pulse turbulence channel transmission
Tongtong Geng, Zhi Liu, Yidi Chang, Haifeng Yao, Guiyun Zhang, Qingfang Jiang
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Proceedings Volume 12602, International Conference on Electronic Information Engineering and Computer Science (EIECS 2022); 126020S (2023) https://doi.org/10.1117/12.2668184
Event: International Conference on Electronic Information Engineering and Computer Science (EIECS 2022), 2022, Changchun, China
Abstract
The free space optical communication information transmission rate is high, which is attractive for high-speed communication scenarios. Compared with the near-Earth communication link, the satellite-to-ground laser communication link has the characteristics of long link distance, cloud layer and atmospheric turbulence. Aiming at the problem that the spread of star-to-ground laser communication pulses produces inter-code crosstalk and reduces the quality of the communication system, this paper analyzes the relationship between gauss optical pulse time domain widening and intercode crosstalk, and uses adaptive filters to balance the channels. The results show that the laser pulse broadening amount increases with the decrease of the input light pulse half wide, and the use of adaptive filter can effectively reduce the influence of code-to-code crosstalk caused by pulse broadening on the communication quality.
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Tongtong Geng, Zhi Liu, Yidi Chang, Haifeng Yao, Guiyun Zhang, and Qingfang Jiang "Channel equalization based on time domain spreading of Gaussian optical pulse turbulence channel transmission", Proc. SPIE 12602, International Conference on Electronic Information Engineering and Computer Science (EIECS 2022), 126020S (20 April 2023); https://doi.org/10.1117/12.2668184
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KEYWORDS
Crosstalk
Atmospheric turbulence
Pulsed laser operation
Digital filtering
Free space optical communications
Signal to noise ratio
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