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Performance improvement of continuous-variable quantum key distribution via photon subtraction

Physical Review A 2013年第1期87卷 012317-012317页

作者： Peng Huang Guangqiang He Jian Fang Guihua Zeng []State Key Laboratory of Advanced Optical Communication Systems and Networks Key Lab on Navigation and Location-based Service Department of Electronic Engineering Shanghai Jiaotong University Shanghai 200240 China

It has been found that non-Gaussian operations can be applied to increase and distill entanglement between Gaussian entangled states. We propose here a method to improve the performance of entanglement-based (EB) continuous-variable quantum-key-distribution protocol by using the non-Gaussian operation, in particular, the subtraction operation, which can be implemented under current technology easily. Security analysis shows that the subtraction operation can well increase the secure distance and tolerable excess noise of the EB scheme and also the corresponding prepare-and-measure scheme.

关键词： QUANTUM theory PERFORMANCE evaluation VARIABLES (Mathematics) PHOTONS SUBTRACTION (Mathematics) QUANTUM entanglement

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Experimental demonstrations of symmetirc 40-Gb/s TWDM-PON

Experimental demonstrations of symmetirc 40-Gb/s TWDM-PON

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International Conference on Information, communications and Signal Processing

作者： Lilin Yi Zhengxuan Li Meihua Bi Hao He Wei Wei Shilin Xiao Weisheng Hu State Key Lab of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong University Shanghai China

We have experimentally demonstrated symmetric 40Gb/s TWDM-PON with long passive reach and high power budget. Directly-modulated lasers (DMLs) are used as both downstream and upstream lasers to reduce the system cost, and optical reshaping filter is used to manage the chirp of the DMLs for all the upstream and downstream channels, enabling long distance transmission without dispersion compensation. The power budget is as high as 43 dB for 100-km passive reach, supporting 64 users.

关键词： Passive optical networks optical fiber filters optical network units Chirp Sensitivity optical fibers

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Transferring planar surface plasmon resonance structures onto fiber end facets and integration with microfluidics

Transferring planar surface plasmon resonance structures ont...

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Frontiers in Optics, FIO 2013

作者： He, Xiaolong Long, Jing Yi, Hui Chen, Leng Tang, Yihe Yang, Tian Univ. of Michigan-Shanghai Jiaotong Univ. Joint Institute Natl Key Lab. of Nano/Micro Fabr. Tech. Key Laboratory for Thin Film and Microfabrication of the Ministry of Education State Key Lab of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong Univ. China

Planar arrays of gold nanoslits are efficiently transferred to the end facets of single mode fibers with high quality, using the "glue and strip" method. A microfluidics integrated fiberoptic surface plasmon... 详细信息

ISBN: (纸本)9781557529879

关键词： Microfluidics

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A novel solution to improve uplink synchronization control in OFDM-based mobile networks

A novel solution to improve uplink synchronization control i...

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IEEE Conference on Wireless communications and networking

作者： Wei Luo Anpeng Huang Linzhen Xie Tammy Chang State Key Lab of Advanced Optical Communication Systems and Networks Peking University China Department of Electrical Engineering Stanford University CA USA

ISBN: (纸本)9781467359382

In OFDM-based mobile networks, uplink synchronization is essential in order for an eNB (evolved Node Base station) to handle a variety of interference issues. To guarantee uplink synchronization control, the HARQ (Hybrid Automatic Repeat-reQuest) mechanism is applied into the process of its TAC (Timing Advance Command) transmission in current standards. But HARQ conflicts with the TAC scheduling mechanism in nature, because TAC control information is typically scheduled for transmission at the end of a synchronization period in order to save signaling overhead by reducing TAT (Time Alignment Timer) restart frequency. To handle the conflict between the extra HARQ retransmission delay and TAC scheduling mechanism, we propose a novel TO (Time Offset)-TAC solution that can remove the side effects from TAC information delivery caused by the extra delay of HARQ retransmission. We conduct system-level simulation experiments to evaluate our proposal's performance gain. Results demonstrate that our solution can avoid losing synchronization due to its TAT expiration, at a slight penalty of signaling overhead. This study is the first effort at addressing how to guarantee uplink time alignment in the control layer, which is the basis for suppressing interference from “time-staggered symbols” among multiple paths.

关键词： Synchronization Uplink Delays Mobile communication Mobile computing Proposals

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Low-Density Parity-Check Code-Based WDMOFDM-PON

Low-Density Parity-Check Code-Based WDMOFDM-PON

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2013 22nd Wireless and optical communication Conference

作者： Qinglong Luo Min Feng Chenglin Bai Hao He Weisheng Hu College of Physics Science and Information Engineering Liaocheng University State Key Lab of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong University

ISBN: (纸本)9781467356985

In this letter,a WDM-OFDM-PON architecture using LDPC code is brought up to increase transmission range and system *** optical line terminal(OLT),LDPCcoded OFDM signal at 10-Gb/s is transmitted as *** each optical network unit(ONU),the optical OFDM signal is demodulated with direct detection,and on-off keying date at 2.5Gb/s is returned as *** results show that the transmission distance could exceed 20-km with negligible penalty.

关键词： passive optical network orthogonal frequencydivision multiplexing(OFDM) low-density parity-check(LDPC)

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A Self-Adaptive Scheduling (SAS) Solution for Enhancing VoIP Service Quality in OFDM-based Mobile networks

A Self-Adaptive Scheduling (SAS) Solution for Enhancing VoIP...

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IEEE International Conference on communications

作者： Tammy Chang Yang Wang Anpeng Huang Department of Electrical Engineering Stanford University California United States Institute of Network Computing and Information Systems Peking University Beijing China State Key Lab of Advanced Optical Communication Systems and Networks Peking University Beijing China

To save signaling overhead, Serai-Persistent Scheduling (SPS) is the standard for delivering Voice-over-IP (VoIP) in OFDM-based mobile networks. But uncompressed or variable-size compressed VoIP packets are problematic for SPS because they spill over the assigned semi-persistent resource whenever the ROHC (Robust Header Compression) mechanism is in an initialization or reset period, propagating system latency and accumulating unnecessary signaling overhead. In response, we propose a Self-Adaptive Scheduling (SAS) algorithm, where dynamic scheduling is used as an adaptive mechanism to assist in scheduling oversized packets, triggered by buffer information already known to the system, without requiring dedicated signaling. To analyze the performance of our proposal in theory, we created a novel theoretical model to describe VoIP traffic considering the uncompressed voice state. This is, to our best knowledge, the first effort to model the effect of uncompressed packets on VoIP performance in mobile networks from the system-level point of view. Theoretical analysis and simulation experiments validate our proposal, demonstrating its ability to enhance the VoIP user experience for a minor signaling overhead cost.

关键词： Decision support systems Quality of service Reliability

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Dynamic bandwidth allocation& guarantee for virtualized networks in cloud

Dynamic bandwidth allocation& guarantee for virtualized netw...

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International Conference on Information, communications and Signal Processing

作者： Xuan Luo Pengfei Zhang Tong Ye Yaohui Jin Jianping Wang Network and Information Center Shanghai Jiaotong University State Key Laboratory of Advanced Optical Communication Systems & Networks Shanghai Jiaotong University Department of Computer Science City University of Hong Kong

ISBN: (纸本)9781479904327

Among all SLAs(Service Level Agreements) about network resources in the cloud, a critical problem would be achieving bandwidth guarantee under all communication environment (e.g., when misbehaved VMs exist) while keeping acceptable bandwidth utility and system scalability. In this paper, we present an architecture of dynamic bandwidth allocation and guarantee on resource fairness, to provide network performance isolation and protocol independent bandwidth guarantees. In this paper, we first discuss the business model of bandwidth guarantee for Infrastructure-as-a-Service (IaaS) cloud, and a bandwidth allocation algorithm based on redefined fairness model is proposed and realized under the novel architecture, and finally experiment shows satisfying results under various communication scenarios.

关键词： Bandwidth Switches Protocols Integrated circuits

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A bidirectional multi-band 60-GHz wireless-over-fiber transmission system with compacted base station and mobile terminal using a robust mm-Wave LO free technique

A bidirectional multi-band 60-GHz wireless-over-fiber transm...

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optical Fiber communication (OFC) Conference

作者： Chenhui Ye Liang Zhang Ming Zhu Anlin Yi Lan Rao Jianjun Yu Yikai Su Sailing He Gee-Kung Chang School of Electrical and Computer Engineering Georgia Institute of Technology Atlanta GA USA State Key Laboratory of Modern Optical Instrumentation Zhejiang University Hangzhou China State Key Lab of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong University Shanghai China

For the first time, bidirectional multi-band multi-gigabit wireless-over-fiber transmission at 60-GHz mm-wave band has been accomplished with centrally supplied LO service. It does not require mm-wave LO devices in ea... 详细信息

ISBN: (纸本)9781557529626

关键词： Uplink Downlink optical fibers Wireless communication optical receivers optical mixing

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High-peak-power femtosecond pulse generation using graphene as saturated absorber and dispersion compensator

High-peak-power femtosecond pulse generation using graphene ...

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39th European Conference and Exhibition on optical communication, ECOC 2013

作者： Yi, Lilin Li, Zhengxuan Zheng, Ran Ni, Zhenhua Nan, Haiyan Liang, Zheng Ding, Rong Hu, Weisheng State Key Lab of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong University Shanghai 200240 China Department of Physics Southeast University Nanjing China Graphene Research and Characterize Center Taizhou Sunano New Energy Corporation Taizhou China

We demonstrate a passively mode-locked Erbium-doped fibre laser by using CVD fabricated graphene as both saturated absorber and dispersion compensator to achieve a 12-nJ energy pulse with 303-fs width, resulting in a ... 详细信息

ISBN: (纸本)9781849197595

关键词： Graphene

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Experimental demonstration of subband switching in Tb/s elastic optical network based on optical SCFDM superchannel

Experimental demonstration of subband switching in Tb/s elas...

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2012 17th Opto-Electronics and communications Conference, OECC 2012

作者： Zhong, Yucheng Li, Juhao Chen, Yuanxiang Zhao, Chunxu He, Yongqi Chen, Zhangyuan State Key Lab. of Advanced Optical Communication Systems and Networks Peking University Beijing 100871 China

We experimentally demonstrate subband switching with a frequency spacing of 10-GHz in a Tb/s elastic optical network based on optical single-carrier frequency-division-multiplexing (SCFDM) superchannel. © 2012 IEEE.

ISBN: (纸本)9781467309776

关键词： Fiber optic networks

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