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	Optical adaptive power control based on atmospheric channel reciprocity for mitigating turbulence disturbances in free-space optics communication
	H. Yao, W. Wang, C. Zhou, J. Cao, Q. Hao, C. Chen, K. Dong, S. Tong, Z. Liu, X. Liu and H. Jiang
	2023
发表期刊	Optics Express
ISSN	10944087
卷号	31期号:22页码:36992-37010
摘要	A continuous time-domain adaptive power model of transmitter optical and control algorithm based on atmospheric turbulence channel reciprocity are explored for mitigating the free-space optical communication (FSOC) receiver optical intensity scintillation and bit error rate (BER) deterioration. First, a transmitter optical adaptive power control (OAPC) system architecture using four wavelength optical signals based on atmospheric turbulence channel reciprocity is proposed, and electronically variable optical attenuator (EVOA) and erbium-doped fiber amplifier (EDFA) are employed as the main OAPC units for power adaptation. Moreover, a reciprocity evaluation model for gamma-gamma (G-G) continuous-time signals is generated using the autoregressive moving average (ARMA) stochastic process, which takes into account the delay time and system noise, and a reciprocity-based OPAC algorithm is proposed. Numerical simulations were also performed to analyze the signal reciprocity characteristics under different turbulence, noise, and sampling time mismatch at both ends, as well as the scintillation index (SI) performance under OAPC system operation. Simultaneously, the time-domain signals of continuous quadrature amplitude modulation -16 (QAM-16) and QAM-32 real states are fused with the gamma-gamma (G-G) reciprocal turbulence continuous signals to analyze the probability density function (PDF) and bit error ratio (BER) performance after OAPC correction. Finally, a 64 Gpbs QAM-16 OPAC communication experiment was successfully executed based on an atmospheric turbulence simulator. It is shown that the OAPC correction is carried out using reciprocity at millisecond sampling delay, the light intensity scintillation of the communication signal can be well suppressed, the signal-to-noise ratio (SNR) is greatly improved, the suppression is more obvious under strong turbulence, the overall BER reduction is greater than 2.8 orders of magnitude with the OAPC system, and this trend becomes more pronounced as the received power increases, even reach 6 orders of magnitude in some places. This work provides real time-domain continuous signal samples for real signal generation of communication signals in real turbulence environments, adaptive coding modulation using reciprocity, channel estimation, and optical wavefront adaptive suppression, which are the basis of advanced adaptive signal processing algorithms. © 2023 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement.
DOI	10.1364/OE.498103
URL	查看原文
收录类别	sci ; ei
引用统计
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/68098
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	H. Yao, W. Wang, C. Zhou, J. Cao, Q. Hao, C. Chen, K. Dong, S. Tong, Z. Liu, X. Liu and H. Jiang. Optical adaptive power control based on atmospheric channel reciprocity for mitigating turbulence disturbances in free-space optics communication[J]. Optics Express,2023,31(22):36992-37010.
APA	H. Yao, W. Wang, C. Zhou, J. Cao, Q. Hao, C. Chen, K. Dong, S. Tong, Z. Liu, X. Liu and H. Jiang.(2023).Optical adaptive power control based on atmospheric channel reciprocity for mitigating turbulence disturbances in free-space optics communication.Optics Express,31(22),36992-37010.
MLA	H. Yao, W. Wang, C. Zhou, J. Cao, Q. Hao, C. Chen, K. Dong, S. Tong, Z. Liu, X. Liu and H. Jiang."Optical adaptive power control based on atmospheric channel reciprocity for mitigating turbulence disturbances in free-space optics communication".Optics Express 31.22(2023):36992-37010.

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