检索结果-内蒙古大学图书馆

Learnable digital signal processing:a new benchmark of linearity compensation for optical fiber communications

Light(Science & Applications) 2024年第9期13卷 1931-1943页

作者： Zekun Niu Hang Yang Lyu Li Minghui Shi Guozhi Xu Weisheng Hu Lilin Yi State Key Lab of Advanced Optical Communication Systems and Networks School of Electronic Information and Electrical EngineeringShanghai Jiao Tong UniversityShanghai 200240PR China

The surge in interest regarding the next generation of optical fiber transmission has stimulated the development of digital signal processing(DSP)schemes that are highly cost-effective with both high performance and low *** benchmarks for nonlinear compensation methods,however,traditional DSP designed with block-by-block modules for linear compensations,could exhibit residual linear effects after compensation,limiting the nonlinear compensation *** we propose a high-efficient design thought for DSP based on the learnable perspectivity,called learnable DSP(LDSP).LDSP reuses the traditional DSP modules,regarding the whole DSP as a deep learning framework and optimizing the DSP parameters adaptively based on backpropagation algorithm from a global *** method not only establishes new standards in linear DSP performance but also serves as a critical benchmark for nonlinear DSP *** comparison to traditional DSP with hyperparameter optimization,a notable enhancement of approximately 1.21 dB in the Q factor for 400 Gb/s signal after 1600 km fiber transmission is experimentally demonstrated by combining LDSP and perturbation-based nonlinear compensation *** from the learnable model,LDSP can learn the best configuration adaptively with low complexity,reducing dependence on initial *** proposed approach implements a symbol-rate DSP with a small bit error rate(BER)cost in exchange for a 48%complexity reduction compared to the conventional 2 samples/symbol *** believe that LDSP represents a new and highly efficient paradigm for DSP design,which is poised to attract considerable attention across various domains of optical communications.

关键词： fiber signal optical

来源：评论

学校读者我要写书评

暂无评论

Comparison of MLSD and M-BCJR for 1.6T Data-Center Interconnects with Brick-wall Bandwidth Limitation

Comparison of MLSD and M-BCJR for 1.6T Data-Center Interconn...

引用

2024 Asia communications and Photonics Conference, ACP 2024 and International Conference on Information Photonics and optical communications, IPOC 2024

作者： Huang, Dangui Zhu, Yixiao Fang, Xiansong Hu, Yimin Zhang, Yikun Zhang, Chenbo Xie, Xiaopeng Zhang, Fan Hu, Weisheng State Key Laboratory of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong University Shanghai China State Key Laboratory of Advanced Optical Communication Systems and Networks Peking University Beijing China

ISBN: (纸本)9798350379266

We experimentally demonstrate single-wavelength 1.6-Tb/s(=8×200Gb/s) data-center interconnects over a 1-km 8-core MCF link. We compare the performance of MLSD and M-BCJR algorithms for FTN transmission under brick-wall bandwidth limitation. The MLSD algorithm achieves 10.19% BER decrease compared with M-BCJR under 40-GHz bandwidth limitation. © 2024 IEEE.

关键词： Bandwidth

来源：评论

学校读者我要写书评

暂无评论

3DPF-FBN: video inpainting by jointly 3D-patch filling and neural network refinement

引用

Science China(Information Sciences) 2022年第7期65卷 251-252页

作者： Yan HUANG Chuanchuan YANG Zhangyuan CHEN State Key Laboratory of Advanced Optical Communication Systems and Networks Department of Electronics Peking University

Dear editor, Video inpainting is a new technology of recovering the lost motion vectors or image blocks during the video sequence transmission. It aims to speculate the correct value of missing voxels from a given video to achieve the automatic inpainting and make the inpainted video frames present a natural visual effect. However, video inpainting remains challenging owing to the difficulties coming from computational complexity, complex scenarios and the high requirement on spatial and temporal consistency.

关键词： video inpainting patch-based searching optical flow neural network refinement

来源：评论

学校读者我要写书评

暂无评论

Sensitivity enhancement and Faraday Effect Compensation in dual-polarization Fiber Optic Rotational Seismometer 4

Sensitivity enhancement and Faraday Effect Compensation in d...

引用

4th International Computational Imaging Conference, CITA 2024

作者： Huang, Huimin Zhu, Lanxin Wang, Wenbo Chen, Yanjun Shi, Fangshuo Li, Zhengbin The State Key Laboratory of Advanced Optical Communication Systems and Networks School of Electronics Peking University Beijing100871 China

ISBN: (纸本)9781510688834

Seismology, as a crucial field of Earth science, is dedicated to understanding the internal structure of the Earth and crustal movements. In recent decades, rotational seismometers become increasingly mature, and rotational observations have found wide applications in various fields including natural earthquakes, engineering seismology, and volcano monitoring. With over 40 years of development, IFOGs have advantages such as low cost and fully solid-state, which have been widely applied in various fields, including inertial navigation, earthquake monitoring, precision measurement, and more. Currently, the development and application of high-precision rotational seismometers based on IFOGs have become a highly researched area of interest. In order to further improve the accuracy, it is necessary to study the accuracy degradation problem of high-precision rotational seismometers based on IFOGs in complex environments and explore effective solutions. This paper aims to address the environmental adaptability and sensitivity problem of high-precision rotational seismometers based on IFOGs and proposes a new structure based on polarization multiplexing and dual optic-fiber coils. The experimental results show that the proposed configuration provides up to a 90-fold suppression of magnetic error. The new configuration sensitivity reach 4.2 × 10-8 rad/s/√Hz. This structure provides a new option for constructing rotational seismometers with superior performance and strong environmental adaptability. © 2025 SPIE.

关键词： Seismographs

来源：评论

学校读者我要写书评

暂无评论

Multi-Task Learning: Towards Low-Complexity Neural Network Nonlinearity Compensation in Coherent optical systems

Multi-Task Learning: Towards Low-Complexity Neural Network N...

引用

2024 Asia communications and Photonics Conference, ACP 2024 and International Conference on Information Photonics and optical communications, IPOC 2024

作者： Ji, Tonghui Wu, Qi Xu, Zhaopeng Ji, Honglin Yang, Yu Liu, Lulu Wang, Shangcheng Sun, Zhongliang Liang, Junpeng Fan, Linsheng Tang, Jianwei Wei, Jinlong Li, Juhao Hu, Weisheng Pengcheng Laboratory Shenzhen China State Key Lab of Advanced Optical Communication System and Networks Shanghai Jiao Tong University Shanghai China State Key Laboratory of Advanced Optical Communication Systems & Networks Peking University Beijing China

We propose multi-task learning based NN equalization for nonlinearity compensation in coherent optical system. Compared with conventional NN equalization, 30% complexity reduction is achieved in an 800-Gb/s PDM-16QAM ... 详细信息

ISBN: (纸本)9798350379266

关键词： Equalizers

来源：评论

学校读者我要写书评

暂无评论

Condition Monitoring of Distribution networks Based on Radiated Electromagnetic Signals

Condition Monitoring of Distribution Networks Based on Radia...

引用

2024 IEEE International Conference on Computational Electromagnetics, ICCEM 2024

作者： Ma, Jie Li, Lianlin School of Electronics Peking University State Key Laboratory of Advanced Optical Communication Systems and Networks Beijing China

ISBN: (纸本)9798350383317

The reliable operation of the distribution network is intricately linked to the overall stability of the power system. However, existing methodologies often fall short in precisely identifying the fault location within the electricity distribution network and providing timely warnings prior to the occurrence of faults. The development of electromagnetic sensing theory and artificial intelligence algorithms has provided a new method for the monitoring of distribution networks. To address the inverse problem, this work investigates the field distribution around the distribution network, analyzes the characteristics of the power frequency electromagnetic field and partial discharge field. Furthermore, it conducts an analysis of the feasibility of using electromagnetic sensing theory to monitor the operational status of the distribution network. © 2024 IEEE.

关键词： Electric power distribution

来源：评论

学校读者我要写书评

暂无评论

Fast and Accurate Estimation of MDL-Induced SNR Penalty in SDM Link with Non-uniform Noise Loading

Fast and Accurate Estimation of MDL-Induced SNR Penalty in S...

引用

2024 Asia communications and Photonics Conference, ACP 2024 and International Conference on Information Photonics and optical communications, IPOC 2024

We propose a fast and accurate estimation method of MDL-induced SNR penalty with non-uniform noise loading in SDM *** proposed approach substantially saves the time cost while maintaining an estimation error within 0.... 详细信息

ISBN: (纸本)9798350379266

关键词： Signal to noise ratio

来源：评论

学校读者我要写书评

暂无评论

Performance analysis of quantum key distribution using polarized coherent-states in free-space channel

引用

Chinese Physics B 2023年第3期32卷 111-119页

作者：郑增特陈子扬黄露雨王翔宇喻松 State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and TelecommunicationsBeijing 100876China State Key Laboratory of Advanced Optical Communication Systems and Networks School of Electronicsand Center for Quantum Information TechnologyPeking UniversityBeijing 100871China

In free space channel,continuous-variable quantum key distribution(CV-QKD)using polarized coherent-states can not only make the signal state more stable and less susceptible to interference based on the polarization non-sensitive of the free-space channel,but also reduce the noise introduced by phase ***,arbitrary continuous modulation can not be carried out in the past polarization coding,resulting in that the signal state can not obtain arbitrary continuous value in Poincare space,and the security analysis of CV-QKD using polarized coherent-states in free space is not *** we propose a new modulation method to extend the modulation range of signal states with an optical-fiber-based polarization *** particular,in terms of the main influence factors in the free-space channel,we utilize the beam extinction and elliptical model when considering the transmittance and adopt the formulation of secret key *** addition,the performance of the proposed scheme under foggy weather is also taken into consideration to reveal the influence of severe *** simulation shows that the proposed scheme is seriously affected by attenuation under foggy *** protocol fails when visibility is less than 1 *** the same time,the wavelength can affect the performance of the proposed ***,under foggy weather,the longer the wavelength,the smaller the attenuation coefficient,and the better the transmission *** proposed scheme can expand the modulation range of signal state,and supplement the security research of the scheme in the free-space channel,thus can provide theoretical support for subsequent experiments.

关键词： polarized coherent-states free-space channel performance analysis

来源：评论

学校读者我要写书评

暂无评论

Correction for phase-generated carrier algorithm demodulation errors caused by uneven frequency response

Correction for phase-generated carrier algorithm demodulatio...

引用

2023 advanced Fiber Laser Conference, AFL 2023

作者： Zhu, Lanxin Huang, Huimin Cao, Xinyu Li, Zhengbin State Key Laboratory of Advanced Optical Communication Systems and Networks School of Electronics Peking University Beijing100871 China

ISBN: (纸本)9781510677661

The phase-generated carrier (PGC) algorithm is one of the most commonly employed demodulation schemes in optical fiber sensors. It exhibits high sensitivity in detecting weak signal and is less susceptible to fluctuations in light source intensity. However, the inevitable uneven frequency response of photoelectric detection will lead to distortion in the harmonic amplitudes, subsequently resulting in demodulation errors in the PGC scheme. This significantly jeopardizes the precision and accuracy of optical fiber sensors. This paper analyzes the demodulation errors in the PGC algorithm caused by non-uniform frequency response and proposes a correction method. In this method, only a correction factor is introduced in the final step of the PGC algorithm, without introducing additional complex computations. In comparison to conventional correction algorithms such as linear regression, function fitting, and neural networks, this method is simple, effective, and resource-friendly for DSP systems with limited resources. Experimental validation of this method is conducted using a fiber optic gyroscope prototype. The results demonstrate a remarkable reduction of 33-fold in demodulation error within the measurement range of-6 to +6 radian, reducing it from 610 parts per million (ppm) to a mere 18.3 ppm. © COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.

关键词： Demodulation

来源：评论

学校读者我要写书评

暂无评论

Compensation of Scale Factor Error for Open-loop Fiber Optic Gyroscopes

Compensation of Scale Factor Error for Open-loop Fiber Optic...

引用

2024 Conference on Lasers and Electro-Optics, CLEO 2024

作者： Zhu, Lanxin Huang, Huimin Cao, Xinyu Chen, Yanjun Li, Zhengbin State Key Laboratory of Advanced Optical Communication Systems and Networks School of Electronics Peking University Beijing100871 China

Theoretical analysis of the scale factor nonlinearity (SFN) in open-loop fiber optic gyroscopes is conducted. A k-factor compensation method is introduced, effectively reducing SFN to 2.5 ppm over the range of -300 to... 详细信息

ISBN: (纸本)9781957171395

关键词： Gyroscopes

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：