Research on Highly Reliable Transmission based on Delta-sigma Modulation for Power Communication

ZHANG Jun; RUI Wenjun; Lü Na

doi:10.13756/j.gtxyj.2025.230156

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Research on Highly Reliable Transmission based on Delta-sigma Modulation for Power Communication

更新时间：2025-02-17

- Research on Highly Reliable Transmission based on Delta-sigma Modulation for Power Communication
- Study on Optical Communications Issue 1, (2025)
- 作者机构：
  
  1.中国电力工程顾问集团华东电力设计院有限公司，上海　 200063
  2.国家能源集团泰州发电有限公司，江苏　泰州　 225327
- 作者简介：
- 基金信息：
- DOI：10.13756/j.gtxyj.2025.230156
  CLC： TN929
- Published：10 February 2025，
  
  Received：18 October 2023，
  
  Revised：27 November 2023，
- 稿件说明：
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张俊，芮文君，吕娜. 面向电力通信的Delta-sigma调制高可靠传输研究[J]. 光通信研究，2025(1): 230156.

Zhang J, Rui W J, Lü N. Research on Highly Reliable Transmission based on Delta-sigma Modulation for Power Communication[J]. Study on Optical Communications, 2025(1): 230156.
张俊，芮文君，吕娜. 面向电力通信的Delta-sigma调制高可靠传输研究[J]. 光通信研究，2025(1): 230156. DOI： 10.13756/j.gtxyj.2025.230156.

Zhang J, Rui W J, Lü N. Research on Highly Reliable Transmission based on Delta-sigma Modulation for Power Communication[J]. Study on Optical Communications, 2025(1): 230156. DOI： 10.13756/j.gtxyj.2025.230156.

摘要

【目的】

电力通信专网用于电力系统的调度、运营和管理，其重要特点是高度的可靠性和实时性。当前电力通信专网的典型中继距离为40 km，为了进一步提升其可靠性，可以增加单光口传输距离和减少光放大器数量，从而减少潜在故障点。

【方法】

文章提出了一种基于Delta-sigma调制的高保真度数字传输方法，在发射端利用过采样、噪声整形和两电平量化等方法，将原始高阶调制信号转化成正交相移键控（QPSK）的光域波形，以大幅提升传输过程中对链路噪声和非线性的抵抗能力。在接收端通过符号判决移除链路噪声，再利用低通滤波器消除整形后的带外量化噪声，最终实现原始信号的低复杂度解调。

【结果】

在验证性离线实验中，经过160 km标准单模光纤的无中继传输和相干检测后，50 GBaud偏振复用QPSK光域波形可以实现无误码传输。解调后的原始高阶调制信号在9倍过采样下，恢复信噪比（SNR）可以达到33.0 dB，达到32.0 dB的SNR门限，能够支持1 024进制正交幅度调制（1 024-QAM）信号的高保真传输，单波长比特率为111 Gbit/s。

【结论】

实验结果表明，Delta-sigma调制方案能够以带宽展宽获取SNR提升，从而有效拓展传输跨距和传输性能，为下一代低成本和高可靠性电力专网提供了潜在的解决方案。

Abstract

【Objective】

The dedicated power communication network is used for the dispatch

operation

and management of power systems

with its key characteristics being high reliability and real-time performance. At present

the typical relay distance of the power communication network is 40 km. In order to further improve its reliability

the number of optical amplifiers can be reduced by increasing the transmission distance between two optical nodes

which reduces the potential fault points as well.

【Methods】

In this work

a high-fidelity digital transmission scheme based on Delta-sigma modulation is proposed. At the transmitter

over-sampling

noise shaping

and two-level quantization are used to map the original high-order modulation signal into Quadrature Phase Shift Keying (QPSK) optical waveform

which improves the tolerance of the link noise and fiber nonlinearity. At the receiver

the link noise is removed by symbol decision

and then the out-of-band quantization noise is suppressed by a low-complexity low-pass filter for the demodulation of the original signal.

【Results】

In the proof-of-concept experiment

after unrepeated transmission through 160 km standard single-mode fiber and coherent detection

50 GBaud polarization-division-multiplexed QPSK optical waveform can achieve error-free transmission. At 9-times over-sampling

the recovered Signal-to-Noise Ratio (SNR) of original signal can reach 33.0 dB

which satisfies the 32.0 dB SNR threshold and supports high-fidelity transmission of 1 024-Quadrature Amplitude Modulation (1 024-QAM) signals with a single-wavelength bitrate of 111 Gbit/s.

【Conclusion】

Experimental results demonstrate that the Delta-sigma modulation scheme can achieve an improvement in SNR through bandwidth broadening

effectively extending transmission reach and performance. This provides a potential solution for the next generation of low-cost and high-reliability dedicated power communication networks.

关键词

Keywords

references

GB/T 38438-2019，电力通信网运行评估指标体系 [S ] .

GB/T 38438-2019, Operational Evaluation Index System for Electric Power Communication Network [S ] .

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 .

Wang J , Jia Z , Campos L A , et al . Delta-sigma Digitization and Optical Coherent Transmission of DOCSIS 3.1 Signals in Hybrid Fiber Coax Networks [J ] . Jour-nal of Lightwave Technology , 2018 , 36 ( 2 ): 568 － 579 .

Wang J , Jia Z , Campos L A , et al . Delta-sigma Modulation for Next Generation Fronthaul Interface [J ] . Journal of Lightwave Technology , 2019 , 37 ( 12 ): 2838 － 2850 .

Li H , Verplaetse M , Verbist J , et al . Real-time 100-GS/s Sigma-delta Modulator for All-digital Radio-over-fiber Transmission [J ] . Journal of Lightwave Technology , 2020 , 38 ( 2 ): 386 － 393 .

Zhong L , Zou Y , Zhang S , 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 .

敬天成 , 段红光 , 赵旭 , 等 . 电力线载波通信中基于深度学习的信道估计 [J ] . 光通信研究 , 2024 ( 2 ): 220058 .

Jing T C , Duan H G , Zhao X , et al . Deep Learning based Channel Estimation in PLC Communication [J ] . Study on Optical Communications , 2024 ( 2 ): 220058 .

Schreier R , Pavan S , Temes G C . Understanding Del-ta-sigma Data Converters [M ] . Online : Wiley , 2017 .

Pfau T , Hoffmann S , Noe R . Hardware-efficient Coherent Digital Receiver Concept with Feedforward Carrier Recovery for M -QAM Constellations [J ] . Journal of Lightwave Technology , 2009 , 27 ( 8 ): 989 － 999 .

Che D . Digital SNR Adaptation of Analog Radio-over-fiber Links Carrying up to 1048 576-QAM Signals [C ] // 2020 European Conference on Optical Communications (ECOC) . Brussels, Belgium : IEEE , 2020 : 9333307 .

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