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International Conference on Identification, Information and Knowledge in the Internet of Things (IIKI)

作者： Juan Li Hao Zhang Xuerong Cui Yongping Xiong Department of Computer and Communication Engineering China University of Petroleum (East China) Qing Dao China Department of Information Science and Engineering Ocean University of China Qing Dao China State Key Lab of Networking and Switching Tech. Beijing University of Posts and Telecommunications Beijing China

IEEE 802.11p is a new standard to support intelligent transport system (ITS) applications which is an approved amendment to the IEEE 802.11a standard to add wireless access in vehicular environments. Timing synchronization is studied a lot for IEEE 802.11a, but for IEEE 802.11p, there is few literature. Therefore, a new method is put forward and the characteristics of the timing synchronization samples are analyzed based on the additive white Gaussian noise (AWGN) and international telecommunications union (ITU) vehicular test environments. The analysis results can give help to other improvement algorithm.

关键词： Standards OFDM Synchronization Estimation Delays Wireless sensor networks

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Adaptive spectrum detecting algorithm in cognitive radio

Advances in Intelligent Systems and Computing

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Advances in Intelligent systems and Computing 2014年 215卷 461-475页

作者： Liu, Yun Peng, Qicong Sun, Fuchun Shao, Huaizong Chen, Xingfeng Wang, Ling School of Communication and Technology Engineering University of Electronic Science and Technology of China Chengdu 610054 China State Key Lab of Intelligent Technology and Systems Department of Computer Science and Technology Tsinghua University Beijing 100084 China State Key Laboratory of Remote Sensing Science Institute of Remote Sensing Applications CAS Beijing 100101 China

Cognitive radio (CR) network can make an opportunistic access of spectrum licensed to a primary user (PU). The CR must perform spectrum sensing to detect active PU, thereby avoiding interfering with it. This chapter focuses on adaptively spectrum sensing, so that negative impacts to the performance of the CR network are minimized when CR users experience both stochastic data arrival and time-varying channel. Since the frequency of the spectrum sensing has a directly impact on system throughput and the probability of collision between the PU and CR user, the PU activity is modeled based on the characteristic analysis of the PU spectrum utilization. Based on that, an efficient adaptive sensing algorithm that takes into account the system stability, collision, and throughput is proposed. The CR users can make a balance between them by utilizing a "periodic control factor" which controls the adaptive adjustment of the spectrum sensing frequency. The simulation results indicate that the proposed algorithm has excellent performance on collision probability and throughput compared with conventional periodic spectrum sensing scheme. Meanwhile, it is shown that the proposed algorithm has low implementation complexity for practical applications. © Springer-Verlag Berlin Heidelberg 2014.

关键词： Cognitive radio

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A novel spectrum sensing algorithm in cognitive radio system based on OFDM

Advances in Intelligent Systems and Computing

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Advances in Intelligent systems and Computing 2014年 215卷 131-138页

作者： Yun, Liu Peng, Qicong Sun, Fuchun Shao, Huaizong Chen, Xingfeng Wang, Ling School of Communication and Technology Engineering University of Electronic Science and Technology of China Chengdu 610054 China State Key Lab of Intelligent Technology and Systems Department of Computer Science and Technology Tsinghua University Beijing 100084 China State Key Laboratory of Remote Sensing Science Institute of Remote Sensing Applications CAS Beijing 100101 China

In cognitive radio (CR) networks, spectrum sensing which attracts a lot of interest is a significant task. Aiming at the problem that conventional spectrum sensing technique is usually focused on signal band. This paper introduces a multiband joint spectrum detection based on multiple signal classification (MUSIC) algorithm for orthogonal frequency division multiplexing (OFDM) cognitive ratio system. The proposed eigenvalue-construct method only uses signal autocorrelation of OFDM symbols and simple sorting to achieve the spectrum detection. The computer simulations show that the proposed approach has a good performance compared with the conventional energy sensing method which uses the same threshold over multiple frequency bands. © Springer-Verlag Berlin Heidelberg 2014.

关键词： Cognitive radio

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Quantum wireless multihop communication based on arbitrary Bell pairs and teleportation

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Physical Review A 2014年第2期89卷 022329-022329页

作者： Kan Wang Xu-Tao Yu Sheng-Li Lu Yan-Xiao Gong National ASIC System Engineering Research Center Southeast University Nanjing 210096 China State Key Lab. of Millimeter Waves Southeast University Nanjing 210096 China Department of Physics Southeast University Nanjing 211189 China

communication in quantum wireless multihop networks is useful in global quantum networks. We propose a scheme for faithful quantum communication in quantum wireless multihop networks, by performing quantum teleportation between two distant nodes which do not initially share entanglement with each other. The required entanglement among intermediate nodes is established through entanglement swapping based on arbitrary types of Bell pairs. All the measurement outcomes and the types of Bell pairs are sent to the destination node independently. The initial quantum state can be finally recovered by corresponding local operations. Our scheme can reduce end-to-end communication delay by using simultaneous measurements in contrast to the scheme based on sequential entanglement swapping.

关键词： QUANTUM communication WIRELESS communication systems QUANTUM teleportation QUANTUM networks (Optics) WIRELESS sensor nodes QUANTUM measurement

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A novel PAPR reduction algorithm based on precoding techniques applied in 60GHZ OFDM-RoF system

A novel PAPR reduction algorithm based on precoding techniqu...

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Asia communications and Photonics Conference, ACP 2013

作者： Wang, Yanjin Li, Xinying Tao, Li Wang, Yiguang Fang, Yuan Department of Communication Science and Engineering State Key Lab of ASIC and System Fudan University Shanghai 200433 China

A 60GHz RoF system with precoded 16QAM-OFDM signals is experimentally demonstrated. The results prove that precoding can reduce the PAPR of OFDM signals by at least 2.5dB and improve receiver sensitivity by at least 2... 详细信息

ISBN: (纸本)9781557529893

关键词： Peak to average power ratio

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PAPR reduction and computational complexity analysis of interleaved segmentation in 60GHz OFDM-RoF system

PAPR reduction and computational complexity analysis of inte...

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2013 Optical Fiber communication Conference and Exposition and the National Fiber Optic Engineers Conference, OFC/NFOEC 2013

作者： Shao, Yufeng Chi, Nan Wang, Yanjin Wang, Yuanquan Jianjun, Yu. State Key Lab of ASIC and System Department of Communication Science and Engineering Fudan University Shanghai 200433 China

We demonstrate that interleaved segmentation technique provides a trade-off between PAPR and computational complexity in 60GHz RoF system with 5Gb/s 16QAM-OFDM downlink. Moreover, the receiver sensitivity is effective... 详细信息

ISBN: (纸本)9781479904570

关键词： Peak to average power ratio

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Frequency pre-distortion for coherent optical MIMO system over MMF

Frequency pre-distortion for coherent optical MIMO system ov...

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2013 18th OptoElectronics and communications Conference Held Jointly with 2013 International Conference on Photonics in Switching, OECC/PS 2013

作者： Zhang, Ziran Wang, Yuanquan Li, Rongling Fang, Wuliang Shao, Yufeng Chi, Nan Department of Communication Science and Engineering State Key Laboratory of ASIC and System Fudan University Shanghai 200433 China

ISBN: (纸本)9784885522710

In this paper, based on the prototype of a commercial OM2 multimode fiber product, tap delay lines filter model and mode spatial coupling theory, we establish a complete analytical model for coherent optical multiple-input- multiple-output (MIMO) systems over multimode fiber (MMF) with ring launching and receiving. With this model, we transmitted 10Gb/s QPSK signal with frequency pre-distortion over 2500m MMF and achieved error vector magnitude (EVM) less than 0.07 when OSNR is 24dB. © 2013 IEICE.

关键词： Multimode fibers

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Experimental demonstration for 40-km fiber and 2-m wireless transmission of 4-Gb/s OOK signals at 100-GHz carrier

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Chinese Optics Letters 2013年第2期11卷 24-26页

作者：汤禅娟李荣玲邵宇丰迟楠余建军董泽 G. K. Chang State Key Lab of ASIC and System Department of Communication Science and EngineeringFudan University The School of ECE Georgia Insititute of TechnologyAtlantaGA 30332USA

We experimentally demonstrate a 4-Gb/s radio-over-fiber （RoF） system with 40-kin fiber and 2-m wireless distance downstream at 100-GHz carrier. To the best of our knowledge, this is for the first time in China to realize optical wireless link at 100 GHz. In this letter, simple intensity modulator with direct detector （IM-DD） modulation is employed and optical power penalty afZer 40-kin single mode fiber （SMF）-28 and 2-m air link is 3.2 dB with bit-error-rate （BER） at 1 × 10- 9.

关键词： OOK RoF Experimental demonstration for 40-km fiber and 2-m wireless transmission of 4-Gb/s OOK signals at 100-GHz carrier

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An efficient routing scheme for irregular mesh NoCs

An efficient routing scheme for irregular mesh NoCs

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4th IEEE International Conference on Electronics Information and Emergency communication, ICEIEC 2013

作者： Xiao, Qingli Fu, Hongzhou Zheng, Lu Zhang, Dexue College of Information Science and Engineering Shandong University of Science and Technology Qingdao 266590 China State-Key Lab. of ASIC and System Fudan University Shanghai 200240 China

ISBN: (纸本)9781467349314

Topological structure is an important part of the design of network on chip systems. The majority of current NoC architectures employ mesh topology, but at some practical application, NoC systems often integrate a number of heterogeneous blocks, or some fabrication faults, reliability issues, may lead to the need of irregular topologies. Consequently, simplistic routing techniques such as XY scheme can not be employed in irregular topologies. This paper presents an efficient specific routing scheme for the irregular mesh network which can be guaranteed for the connection in irregular topologies. This paper applies routing tables (RT) to realize the algorithm and use OVP (Open Virtual Platforms)+ TLM (Transaction Level Modeling)+systemC to create a virtual platform, achieving a 16 x16 irregular mesh topology of heterogeneous systems. Finally the routing scheme is applied to test specific real application network instances, and the result shows its connectivity and efficiency. © 2013 IEEE.

关键词： Network-on-chip

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Frequency pre-distortion for coherent optical MIMO system over MMF

Frequency pre-distortion for coherent optical MIMO system ov...

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International Conference on Photonics in Switching (PS)

作者： Ziran Zhang Yuanquan Wang Rongling Li Wuliang Fang Yufeng Shao Nan Chi Department of Communication Science & Engineering State Key Laboratory of ASIC & System Fudan University Shanghai China

ISBN: (纸本)9784885522710

In this paper, based on the prototype of a commercial OM2 multimode fiber product, tap delay lines filter model and mode spatial coupling theory, we establish a complete analytical model for coherent optical multiple-input-multiple-output (MIMO) systems over multimode fiber (MMF) with ring launching and receiving. With this model, we transmitted 10Gb/s QPSK signal with frequency pre-distortion over 2500m MMF and achieved error vector magnitude (EVM) less than 0.07 when OSNR is 24dB.

关键词： MIMO Optical transmitters Receivers Optical fiber communication Couplings Optical fiber theory Phase shift keying

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