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Monitoring of PON System Using Compound Surveillance Technique

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Journal of Electronic Science and Technology 2015年第2期13卷 169-173页

作者： Sun-Chien Ko Hsiu-Jung Chuang Si-Chong Chen Chih-Yih Wang Sheng-Fwu Lin telecommunication Laboratories Chunghwa Telecom Co.Ltd.

A passive optical network（PON） monitoring system combined light pulse and frequency sweep techniques is proposed and verified in a field test. The light pulse surveys over the all whole network and the frequency sweep are used to investigate any fault in the link. The field test is performed with 4 PONs. Each PON is monitored at 4 ports, one is the splitter port and the other three are arbitrary chosen multiple optical units（ONUs）. All the tested PONs are monitored in turns once per hour. Faults at the feeder and branch fiber have been observed in this field test and have been analyzed with the monitoring system.

关键词： verified arbitrary monitored splitter branch chosen reflective turns restoration realistic

Content-adaptive robust error concealment for packet-lossy H.264 video streaming

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2006年第z1期7卷 41-47页

作者： LIAO Ning YAN Dan QUAN Zi-yi MEN Ai-dong Multimedia Center School of Telecommunication Engineering Beijing University of Posts & Telecom Beijing 100876 China Multimedia Center School of Telecommunication Engineering Beijing University of Posts & Telecom Beijing 100876 China Multimedia Center School of Telecommunication Engineering Beijing University of Posts & Telecom Beijing 100876 China Multimedia Center School of Telecommunication Engineering Beijing University of Posts & Telecom Beijing 100876 China

In this paper, we present a spatio-temporal post-processing error concealment (EC) algorithm designed initially for a H.264 video-streaming scheme over packet-lossy networks. It aims at optimizing the subjective quality of the restored video under the constraints of low delay and computational complexity, which are critical to real-time applications and portable devices having limited resources. Specifically, it takes into consideration the physical property of motion field in order to achieve more meaningful perceptual video quality, in addition to the improved objective PSNR. Further, a simple bilinear spatial interpolation approach is combined with the improved boundary-match (B-M) based temporal EC approach according to texture and motion activity analysis. Finally, we propose a low complexity temporal EC method based on motion vector interpolation as a replacement of the B-M based approach in the scheme under low-computation requirement, or as a complement to further improve the scheme's performance in applications having enough computation resources. Extensive experiments demonstrated that the proposal features not only better reconstruction, objectively and subjectively, than JM benchmark, but also robustness to different video sequences.

关键词： Error concealment, Error control, H.264/AVC, Video streaming, Lossy transmission

Using the CVP Traffic Detection Model at Road-Section Applies to Traffic Information Collection and Monitor—the Case Study

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Artificial Intelligence Advances 2019年第2期1卷 38-43页

作者： Shing Tenqchen Yen-Jung Su Keng-Pin Chen chunghwa telecom telecommunication Laboratories(CHTTL)Taiwan Graduate student of Dept.of Electronic&Computer Engineering NTUST

This paper proposes a using Cellular-Based Vehicle Probe(CVP)at road-section(RS)method to detect and setup a model for traffic flow information(info)collection and *** are multiple traffic collection devices including CVP,ETC-Based Vehicle Probe(EVP),Vehicle Detector(VD),and CCTV as traffic resources to serve as road condition info for predicting the traffic jam problem,monitor and *** main project has been applied at Tai#2 Ghee-Jing roadway connects to Wan-Li section as a trial field on fiscal year of *** paper proposes a man-flow turning into traffic-flow with Long-Short Time Memory(LTSM)from recurrent neural network(RNN)*** also provide a model verification and validation methodology with RNN for cross verification of system performance.

关键词： Intelligent Transport Systems(ITS) ETC-Based Vehicle Probe(EVP) Vehicle Detector(VD) Long-Short Time Memory(LTSM) Recurrent Neural Network(RNN)

A New 2-D Digital Filter Using a Locally Broadcast Scheme and Its Cascade Form

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维普期刊数据库

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A New 2-D Digital Filter Using a Locally Broadcast Scheme an...

Inductorless Ultra-Wide Band Front-End Chip Design with Noise Cancellation Technology for Wireless Communication Applications 10

Electronic Communication Systems--The 2000 IEEE Asia-Pacific Conference on Circuits and Systems

作者： Lan-Da Van Shing Tenqchen Chi-Hong Chang Wu-Shiung Feng Lab 331 Department of Electrical EngineeringNational Taiwan University Also with chunghwa telecom telecommunication Labs. Department of Electronics Engineering Chang Gung University

ISBN: (纸本)0780362535

＜正＞In this paper,we propose a new two-dimensional（2-D） systolic-array digital filter using locally broadcast scheme that is the hybrid of a modified reordering and another systolic *** architecture occupies locally broadcast,lower quantization error and zero latency without sacrificing the number of multipliers as well as delay elements under the accepted critical *** addition,the widely used 2-D cascaded systolic digital filter can be described and reconstructed by similar methodology.

关键词： two-dimensional digital filters systolic arrays cascade networks filtering theory IIR filters FIR filters 2D digital filter local broadcast scheme cascade form systolic array architecture modified reordering quantization error zero latency multipliers delay elements

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cnki会议

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Journal of Measurement Science and Instrumentation 2010年第3期1卷 256-261页

作者：黄进芳徐铭钧刘荣宜 Department of Electronic Engineering National Taiwan University of Science and Technology Taipei 10672 Taiwan China chunghwa telecommunication Labs. Taoyuan 32601 Taiwan China

An inductorless Ultra-Wide Band （UWB） receiver frontend chip design used in wireless communications for the frequency band of 3.1 - 4.8 GHz is presented. This ho-nodyne receiver mainly consists of a diffexential Low Noise Amplifier （LNA） circuit followed by a down-converting mixer. The proposed LNA circuit with a noise canceling resistor is connected to the CMOS device＇s body to reduce the substrate thermal noise. Simulation and measuremnt results show that the chip can reduce the froat-end Noise Figure （NF） about 0.5dB and achieve the Conversion Gain （03） of 19.44-21.57 dB and double-sideband NF less than 7.8 dB. Also, the input third-order interoept point （IIP3） is - 11 dBm, and the input second-order intercept point （IIP2） is 49 dBm. Fabricated in TSMC 0.18 tan technology, this chip occupies only 0. 167 Iron2 and dissipates power 59.2 roW.

关键词： ultra-wideband UWB noise cancellation

Q-Learning-Based Inter-Networking Mobile Number Portability Congestion Control Mechanism

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China Communications 2011年第5期8卷 165-172页

作者：王安平李原林琳 School of Infirmation Engineering University of Science & Technology Beijing China Academy of telecommunication Research of MIIT

Inter-networking Mobile Number Portability(MNP) is an important way to promote the development of new telecom *** the congestion that always occurs on the MNP query nodes,this paper proposes a Q-learning-based inter-networking mobile number portability congestion control mechanism,taking the node queue delay and query service stability as the control targets,based on the optimal decision which is made over mobile user number portability query through self-adaptive connection admission *** simulation and analysis show that,compared with tail-drop,random early detection and other mechanisms,this mechanism realizes a smoother and more regular queue size when the load is relatively light;and maintains a relatively low and stable queue size with relatively small loss when the load is relatively heavy,thus improving QoS and increasing network throughput at lower cost.

关键词： inter-networking mobile number portability reinforcement learning Q-learning congestion control

A Novel telecommunication System:HAPS

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China Communications 2007年第2期4卷 79-85页

作者： Sun Zhenqiang Zhu Xuetian China telecom Beijing Res Inst Beijing Peoples R China

This paper has identified the main research and development programs in HAPS and their applications across the *** spectrum and licensing issues are presented according to the latest ITU *** make HAPS play a vital rol... 详细信息

关键词： HAPS 3G wireless access satellite airship

Design of Pipelined ADC Using Op Amp Sharing Technique

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Journal of Measurement Science and Instrumentation 2011年第1期2卷 47-51页

作者：黄进芳锺戌彦温俊瑜刘荣宜 Dept. of Electronic Engineering National Taiwan University of Science and Technology Taipei 10672 Taiwan China chunghwa telecommunication Lab. Taoyuan 32601 Taiwan China

This paper presents a 10-bit 20 MS/s pipelined Analog-to- Digital Converter（ADC） using op amp sharing approach and removing Sample and Hold Amplifier（SHA） or SHA-less technique to reach the goal of low-power constanpfion. This design was fabricated in TSMC 0.18 wn 1P6M technology. Measurement results show at supply voltage of 1.8 V, a SFDR of 42.46 dB, a SNDR of 39.45 dB, an ENOB of 6.26, and a THDof41.82 dB are at 1 MHz sinusoidal sig- nal input. In addition, the DNL and INL are 1.4 LSB and 3.23 LSB respectively. The power onstmaption is 28.8 mW. The core area is 0.595 mm2 and the chip area including pads is 1.468 mm2.

关键词： pipelined ADC analog-to-digital comverter op amp sharing SHA-less

Performance Study on Priority Strategies for WDM Packet Switches under Long-Range Dependent Traffic

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光学学报 2003年第S1期23卷 745-746页

作者： Chia-Wei Yu Chao-Chih Chang Shou-Kuo Shao Jingshown Wu Institute of Communication Engineering and Department of Electrical Engineering Taiwan University Taipei TaiwanInstitute of Communication Engineering and Department of Electrical Engineering Taiwan University Taipei TaiwanShou-Kuo Shao is also with Chunghwa Telecom Labs.Institute of Communication Engineering and Department of Electrical EngineeringTaiwan University Taipei. Taiwan.

The impact of long-range dependent (LRD) traffic on the buffer management schemes for WDM packet switches is studied by simulation. The different priority strategies are compared. The principles of efficient strategy ... 详细信息

关键词： WDM with of Performance Study on Priority Strategies for WDM Packet Switches under Long-Range Dependent Traffic PBS PLP PE for on