Research on Real-time Free-Space Optical Transmission Experiment Demonstration based on Delta-Sigma Modulation

WANG Zhong-zhong; AO Xue-yuan; YANG Qi

doi:10.13756/j.gtxyj.2023.05.001

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Research on Real-time Free-Space Optical Transmission Experiment Demonstration based on Delta-Sigma Modulation

更新时间：2023-10-07

- Research on Real-time Free-Space Optical Transmission Experiment Demonstration based on Delta-Sigma Modulation
- Study on Optical Communications Issue 5, Pages: 1-4,15(2023)
- 作者机构：
  
  1.华中科技大学　光电信息学院，武汉　430074
  2.湖北光谷实验室，武汉　430074
- 作者简介：
- 基金信息：
- DOI：10.13756/j.gtxyj.2023.05.001
  CLC： TN929
- Published：10 October 2023，
  
  Received：15 November 2022，
  
  Revised：25 November 2022，
扫描看全文
王忠忠,敖学渊,杨奇.基于Delta-Sigma调制的实时自由空间光传输系统研究[J].光通信研究,2023(5):1-4.

Wang Z Z, Ao X Y, Yang Q.Research on Real-time Free-Space Optical Transmission Experiment Demonstration based on Delta-Sigma Modulation[J].Study on Optical Communications, 2023(5):1-4.
王忠忠,敖学渊,杨奇.基于Delta-Sigma调制的实时自由空间光传输系统研究[J].光通信研究,2023(5):1-4. DOI： 10.13756/j.gtxyj.2023.05.001.

Wang Z Z, Ao X Y, Yang Q.Research on Real-time Free-Space Optical Transmission Experiment Demonstration based on Delta-Sigma Modulation[J].Study on Optical Communications, 2023(5):1-4. DOI： 10.13756/j.gtxyj.2023.05.001.

摘要

为了简化实时相干自由空间光（FSO）/无线传输系统结构并降低成本，文章基于带通Delta-Sigma调制（DSM）技术，实现了一个低成本的FSO系统。带宽为400 MHz、速率为1.6 Gbit/s的256进制正交振幅调制（256-QAM）信号经DSM后，生成10 Gbit/s偏振复用-正交相移键控（PDM-QPSK）信号，在50 m的FSO链路中实现实时传输，且该系统的灵敏度达到-46.2 dBm。从而证明，相干检测和带通DSM的结合将是未来光无线场景的一种有前途的技术。

Abstract

To simplify the structure of real-time coherent Free-Space Optical (FSO) / wireless systems and reduce costs

this paper implements a low-cost FSO system based on bandpass Delta-Sigma Modulation (DSM) technology. A 256-ary Quadrature Amplitude Modulation (256-QAM) signal with a bandwidth of 400 MHz and a rate of 1.6 Gbit/s is generated to realize a 10 Gbit/s Polarization Division Multiplexed-Quadrature Phase Shift Keying (PDM-QPSK) signal after DSM. The real-time transmission in a 50 m FSO link with a sensitivity of -46.2 dBm is achieved. The experimental results indicate that the combination of coherent detection and DSM is a promising technology for future optical wireless scenarios.

关键词

Delta-sigma调制相干检测实时自由空间光传输

Keywords

DSMcoherent detectionreal-timeFSO transmission

references

Esmail M A, Ragheb A M, Fathallah H A, et al. 5G-28 GHz Signal Transmission over Hybrid All-optical FSO/RF Link in Dusty Weather Conditions[J]. IEEE Access, 2019, 7: 24404-24410.

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Wang J, Yu Z, Ying K, et al. Digital Mobile Fronthaul based on Delta-sigma Modulation for 32 LTE Carrier Aggregation and FBMC Signals[J]. Journal of Optical Communications and Networking, 2017, 9(2): A233-A244.

Zhong L S, Zou Y, Zhang S M, et al. An SNR-improved Transmitter of Delta-sigma Modulation Supported Ultra-High-Order QAM Signal for Fronthaul/WiFi Applications[J]. Journal of Lightwave Technology, 2022, 40(9): 2780-2790.

Chen Z, Wu Z Q, Huang J Q, et al. 4×32-Gbps Block-Wise QPSK 1 200-km SSMF Direct Detection Transmission based on Delta-Sigma Virtual Carrier Generation[J]. IEEE Photonics Journal, 2019, 11(6): 1-7.

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