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第七届中国测试学术会议

作者： Feng Xiangchen 冯祥晨 Feng Jianhua 冯建华 Cui Xiaole 崔小乐 Department of Microelectronics Peking University Beijing 100871 Key Lab of Integrated Micro Syste 北京大学微电子学系北京100871 北京大学深圳研究生院集成微系统科学工程与应用重点实验室深圳518055 Key Lab of Integrated Micro System Science Engineering and Application Shenzhen Graduate School of 北京大学深圳研究生院集成微系统科学工程与应用重点实验室深圳518055

测试压缩下的功耗问题已经成为近期研究的热点。本文提出了一种新的低功耗广播式测试压缩结构,通过有限状态机控制一半的内部扫描链在扫描过程中接收持续的常数0,另一半的内部扫描链接收来自扫描通道的测试激励,实现了广播式压缩环境下... 详细信息

测试压缩下的功耗问题已经成为近期研究的热点。本文提出了一种新的低功耗广播式测试压缩结构,通过有限状态机控制一半的内部扫描链在扫描过程中接收持续的常数0,另一半的内部扫描链接收来自扫描通道的测试激励,实现了广播式压缩环境下对内部扫描链选通的自动动态控制。为了提高故障覆盖率,在低功耗广播扫描模式之后增加了串行扫描模式。实验结果表明扫描移位功耗和捕获功耗可降低50％-60％,故障覆盖率可达到无损,不需要对电路结构做大的修改,更适用于大规模的工业电路。

关键词：电路测试低功耗测试扫描模式有限状态机

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ISM: Intent-perceptible service migration model for IP network survivability

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Tien Tzu Hsueh Pao/Acta Electronica Sinica 2011年第12期39卷 2768-2775页

作者： Zhao, Er-Hu Yang, Xiao-Long Xu, Jie Long, Ke-Ping Zhang, Dan Research Centre for Optical Internet and Mobile Information Networks University of Electronic Science and Technology of China Chengdu Sichuan 611731 China National Key Lab. of Integrated Information System Tech. Institute of Software Chinese Acad. of Sci. Beijing 100190 China School of Computer and Communication Engineering University of Science and Technology Beijing Beijing 100083 China 706 Institute The Second Academy of China Aerospace Beijing 100854 China

The existing service migration methods bring the server cluster heavy burden, and their time spending is so high that seriously affects the service continuity. In order to enhance the survivability of IP network services, the paper puts forward an intent-perceptible service migration model (ISM). In this model, we design a novel trigger mechanism and object selecting method for service migration, and make the service migration intention perceptible for the client with the cooperation of the server. The evaluation results show that ISM model can not only ensure the service invulnerability by maintaining a high randomness of service migration, but also improve the service continuity by reducing the service gap time spending on service migration to the maximum extent. Therefore, ISM model can enhance IP network survivability efficiently.

关键词： Internet protocols

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Design and implementation of a novel programmable power monitor chip

Design and implementation of a novel programmable power moni...

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2nd Asia Pacific Conference on Postgraduate Research in microelectronics and Electronics, PrimeAsia 2010

作者： Ge, Binjie Wang, Xin'an Zhang, Xing Feng, Xiaoxing Wang, Qingqin Key Lab. of Integrated Microsystem Science and Engineering Applications Peking University Shenzhen Graduate School Shenzhen China

ISBN: (纸本)9781424467372

This paper proposes a novel programmable power monitor chip. With only three program pins and without any off-chip devices, the chip has 36-program states by taking different connections for the 3-program pins. The chip can monitor the voltage from 1.5v to 5.0v with 0.1v step. Special SH circuit and current limited digital blocks are employed to achieve ultra low quiescent power. The implementation is based on 2M1P 0.5um mixed signal process, the die area is 0.24mm2, and the quiescent current is only 3uA.

关键词： Signal processing

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Operator design methodology and implementation for H.264 entropy encoder

Operator design methodology and implementation for H.264 ent...

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International Conference on Information engineering and Computer science

作者： Hu, Ziyi Chen, Kuilin Wang, Xin'an Key Lab. of Integrated Microsystem Science and Engineering Applications Peking University Shenzhen Graduate School Shenzhen 518055 China

ISBN: (纸本)9781424479412

Currently the ASIC applications such as multimedia processing require shorter time-to-market and higher performance. Furthermore, with the IC manufacturing technology developing continually, from transistor level to logic gate level, the size of standard cells in digital circuits is increasing correspondingly. New methodology should be proposed to meet the need for shorter time-to-market IC industry, and the requirement of advanced IC manufacturing technology. This paper proposed the concept and principle of operator design methodology, then focused on the entropy coding application by the reconfigurable operator and finally gave the synthesis data. The results show that compared with the hardware design at the same cost of resources, this methodology can obtain hardware of suitable performance with regular structure. What is more, it can improve the design speed efficiently. ©2010 IEEE.

关键词： Entropy

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MAC layer intelligent split-stream scheme for alleviating congestion in ad hoc networks

MAC layer intelligent split-stream scheme for alleviating co...

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2010 IEEE International Conference on Wireless Information Technology and systems, ICWITS 2010

作者： Wu, Chun Shao, Fei Wang, Lifeng Southwest University of Science and Technology Mianyang 621000 China State Key Lab. of Integrated Service Networks Xidian University Xi'an 710071 China Institute of China Electronic System Engineering Corporation Beijing 100141 China

ISBN: (纸本)9781424470914

Ad hoc networks, which are multi-hop and autonomous decentralized networks, have broad perspective in military communication, emergency communication, sensor networks and so on. Enhancing the performance of Ad hoc networks is one of the important objectives in the design of networks while congestion is a significant contributor that leads to network performance degradation. Many different congestion control strategies in transport layer, network layer, MAC layer and even cross-layer have been widely researched. Jian Liu et al. bring forward ATCP to improve traditional TCP congestion control in ad hoc networks [1]. Reference [2] proposes a MAC layer congestion control mechanism which mainly uses the congestion window to control the MAC's sending rate in 802.11 WLANs. D. Kliazovich and F. Granelli [3] research a crosslayer congestion control scheme, in which transport layer's data stream is adjust by the information of link layer, such as bandwidth and delay. The essential reason causing congestion is that user data rate exceeds link data transmit rate capability. Most of the congestion control strategies research how to control user data rate properly to achieve the goal. However, in this paper we investigate MAC layer intelligent split-stream scheme to improve data transmit rate capability for alleviating congestion in Ad hoc networks. In a practical Ad hoc network, due to terrain and interference, link qualities of the paths to some nodes are quite good while those to others are relatively bad. Single node conventionally selects good path expecting great performance of itself. However, multi-nodes all select good path often cause severe competition at MAC, which eventually lead to performance degradation of the whole network. © 2010 IEEE.

关键词： Ad hoc networks

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Dynamic Context Management for Coarse-grained Reconfigurable Array DSP Architecture

Dynamic Context Management for Coarse-grained Reconfigurable...

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IEEE 8th International Conference on ASIC

作者： Liu, Yanliang Dai, Peng Wang, Xin'an Zhang, Xing Wei, Lai Zhou, Yan Sun, Yachun Peking University Shenzhen Graduate School China Key Lab. of Integrated Microsystem Science and Engineering Applications China

ISBN: (纸本)9781424438686

This paper proposes a novel technique of dynamic context management scheme for coarse-grained reconfigurable array DSP architecture, which effectively reduces the power consumption and speedup reconfigurable process. The technique permits background loading of configuration data without interrupting the regular execution, overlapping computation with reconfiguration. And stored configurations can be switched dramatically reducing reconfiguration overhead if the next configuration is present in one of the alternate contexts. The proposed technique has been verified in ReMAP (Reconfigurable Multi-media Array Processors) with the Discrete Cosine Transform (DCT) of H.264 and its performance exceed other DSP and multimedia extension architectures by 1.2x to 6.2x. ReMAP was fabricated with SMIC's 0.18um CMOS process mainly for multi-media applications(1).

关键词： Coarse-grained Reconfigurable Array DSP Architecture Context switch Context reuse Runtime reconfiguration (RTR) Partially Reconfiguration

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Implementation of high-speed verification platform based on emulator for ReDSP and ReMAP

Implementation of high-speed verification platform based on ...

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2009 8th IEEE International Conference on ASIC, ASICON 2009

作者： Huang, Wei Wang, Xinan Dai, Peng Guo, Zheng Peking University Shenzhen Graduate School China Key Lab. of Integrated Microsystem Science and Engineering Applications China Mentor Graphics Corporation China

ISBN: (纸本)9781424438686

Verification of processors with high performance is becoming more and more time-consuming and even gradually turning into the bottleneck of the processor design. The Verification of Reconfiguralbe Multimedia Array Processor(ReMAP) we designed for multimedia processing and its internal component Reconfigurable DSP(ReDSP) is also no exception. A high-speed verification platform based on emulator is proposed for ReDSP and ReMAP. We demonstrate the hardware architecture of the platform and different verification modes it supports. A software verification model is proposed, and the evaluation results show a great acceleration rate compared to software simulation1. ©2009 IEEE.

关键词： Verification

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A novel PAPR reduction technique by sampling partial transmit sequences

A novel PAPR reduction technique by sampling partial transmi...

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5th International Conference on Wireless Communications, Networking and Mobile Computing, WiCOM 2009

作者： Yuzhong, Jiao Xin'an, Wang Ying, Xu Xuejiao, Liu Xuewen, Ni Key Lab. of Integrated Microsystem Science and Engineering Applications A406 Shenzhen Graduate School of Peking University Xili Shenzhen 518055 China

ISBN: (纸本)9781424436934

Optimum partial transmit sequence method (OPTS), as one of the highest-performance PAPR reduction techniques, has very high computational complexity. Most sub-optimal schemes which are based on iterative PTS (IPTS), aim at balancing PAPR reduction performance and complexity by expanding the searching space of phase factor sequence with more iterative operations. A novel scheme is presented to further lower the complexity of PTS. This scheme samples every partial transmit sequence, obtains some peak-position samples with the largest magnitudes and then constructs PTS sampling sequence. A proper phase factor sequence can be got through processing PTS sampling sequences according to the principle of OPTS or sub-optimal PTS. Because PTS sampling sequences have fewer samples, the new method can achieve a low complexity. Besides, simulation results show that the new scheme has good PAPR reduction performance. ©2009 IEEE.

关键词： Orthogonal frequency division multiplexing

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Single link tracking scheme based on UWB localization

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Journal of systems engineering and Electronics 2009年第6期20卷 1207-1212页

作者： Xiao Zhu Xiong Hailiang Yu Quan Yi Kechu State Key Lab. of Integrated Service Networks Xidian Univ. Xi'an 710071 P. R. China School of Electronic Science and Engineering National Univ. of Defense Technology Changsha 410073 P. R. China Inst. of China Electronics Equipment System Engineering Corporation Beijing 100039 P. R. China

To investigate the low-complex and high-precise tracking method, a novel single link tracking scheme based on UWB localization is proposed. Two antenna arrays are settled at the fixed station （FS） to receive the UWB signal from mobile terminal （MT）, one FS is enough for the proposed scheme to track the MT. The UWB multipath detection algorithm for time difference of arrival （TDOA） estimation is presented and TDOA is thus adopted to estimate angle of arrival （AOA）, avoiding the synchronization and complicated beamforming for AOA. The impacts of localization errors, concluding multipath and non-line-of-sight （NLOS） errors are simulated for the proposed track scheme. It is demonstrated that the simulation curve can match the real target moving, and the feasibility of the proposed scheme is proved.

关键词： ultra-wide band localization single-link tracking angle of arrival estimation.

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Single link tracking scheme based on UWB localization

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Journal of systems engineering and Electronics 2009年第6期000卷

作者： Xiao Zhu Xiong Hailiang Yu Quan Yi Kechu State Key Lab. of Integrated Service Networks Xidian Univ. Xi'an 710071 P. R. China School of Electronic Science and Engineering National Univ. of Defense Technology Changsha 410073 P. R. China State Key Lab. of Integrated Service Networks Xidian Univ. Xi'an 710071 P. R. China State Key Lab. of Integrated Service Networks Xidian Univ. Xi'an 710071 P. R. China Inst. of China Electronics Equipment System Engineering Corporation Beijing 100039 P. R. China

To investigate the low-complex and high-precise tracking method, a novel single link tracking scheme based on UWB localization is proposed. Two antenna arrays are settled at the fixed station (FS) to receive the UWB signal from mobile terminal (MT), one FS is enough for the proposed scheme to track the MT. The UWB multipath detection algorithm for time difference of arrival (TDOA) estimation is presented and TDOA is thus adopted to estimate angle of arrival (AOA), avoiding the synchronization and complicated beamforming for AOA. The impacts of localization errors, concluding multipath and non-line-of-sight (NLOS) errors are simulated for the proposed track scheme. It is demonstrated that the simulation curve can match the real target moving, and the feasibility of the proposed scheme is proved.

关键词： ultra-wide band localization single-link tracking angle of arrival estimation

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