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2007 IEEE International Conference on Portable Information Devices最新文献

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SC-FDMA Waveform Design, Performance, Power Dynamics and Evolution to MIMO SC-FDMA波形设计、性能、功率动力学及向MIMO演进
2007 IEEE International Conference on Portable Information Devices Pub Date : 2007-05-25 DOI: 10.1109/PORTABLE.2007.55
V. Jungnickel, T. Hindelang, T. Haustein, W. Zirwas
{"title":"SC-FDMA Waveform Design, Performance, Power Dynamics and Evolution to MIMO","authors":"V. Jungnickel, T. Hindelang, T. Haustein, W. Zirwas","doi":"10.1109/PORTABLE.2007.55","DOIUrl":"https://doi.org/10.1109/PORTABLE.2007.55","url":null,"abstract":"We study waveform design, performance and power dynamics of the localized form of the single-carrier frequency-division multiple access (SC-FDMA) considered for uplink in the 3GPP long-term evolution (LTE). A classical single-carrier scheme with root-raised-cosine filtering and two DFT-based schemes are considered, one with and another without a novel spectral expansion. It is shown how to design waveforms similar to the classical scheme by using this spectral expansion. The advantages are that now the transmitter and receiver can be fully specified in frequency domain and that any fraction of the total bandwidth can be assigned to a user. For constant-amplitude modulation (e.g. BPSK, QPSK), the power dynamics is reduced by 3 dB with spectral expansion. Of course, this is bought for 25% more bandwidth. The inherent power dynamics of complex QAM constellations covers part of this gain. Spectral expansion may sometimes be dispensable, e.g. for 16-QAM in the 3GPP LTE uplink. The evolution to MIMO follows directly from the receiver concept based on virtual antennas.","PeriodicalId":426585,"journal":{"name":"2007 IEEE International Conference on Portable Information Devices","volume":"114 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115407187","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 20
Printed Annular Ring Monopole Antenna for UWB Application 用于超宽带的印刷环形单极天线
2007 IEEE International Conference on Portable Information Devices Pub Date : 2007-05-25 DOI: 10.1109/PORTABLE.2007.24
K. Deodhar, P. Baxi, A. Naik, R.K. Gupta
{"title":"Printed Annular Ring Monopole Antenna for UWB Application","authors":"K. Deodhar, P. Baxi, A. Naik, R.K. Gupta","doi":"10.1109/PORTABLE.2007.24","DOIUrl":"https://doi.org/10.1109/PORTABLE.2007.24","url":null,"abstract":"This paper proposes a novel printed annular ring monopole antenna for UWB application. The proposed antenna effectively covers the 3.1 to 10.6 GHz UWB frequency band, which has been approved by the Federal Communications Commission as a commercial UWB band. Prototype of the proposed antenna is designed, fabricated and tested using feed through straight SMA connector. The proposed antenna has a VSWR < 2 over the UWB frequency band. The measured VSWR and radiation patterns indicate the suitability of this antenna for UWB applications.","PeriodicalId":426585,"journal":{"name":"2007 IEEE International Conference on Portable Information Devices","volume":"2009 24","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121009966","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 8
Power Efficient Implementation of Motion Estimation for Portable Devices 便携式设备运动估计的节能实现
2007 IEEE International Conference on Portable Information Devices Pub Date : 2007-05-25 DOI: 10.1109/PORTABLE.2007.34
Murali Manohar, P. Darák
{"title":"Power Efficient Implementation of Motion Estimation for Portable Devices","authors":"Murali Manohar, P. Darák","doi":"10.1109/PORTABLE.2007.34","DOIUrl":"https://doi.org/10.1109/PORTABLE.2007.34","url":null,"abstract":"Recently, the growth in wireless communication has led to increase in demand for high quality video telephony over portable devices. The challenge is to achieve the high quality video encoding performance at real time with minimum power consumption. Many DSP based processor architectures are targeted for the above requirement. The objective is to develop the video coding algorithms in such a way that it best utilizes the processor architecture. In this paper, we discuss power efficient implementation methods of motion estimation algorithm to suit the DSP based processor architecture. Proposed schemes are optimal pixel sub sampling pattern for SAD computation and half pixel estimation derived from SAD of integer search. Further, we suggest methods for improving the motion estimation decision capability by adjusting the SAD adaptively and improving picture quality by intelligent macroblock coding type decision.","PeriodicalId":426585,"journal":{"name":"2007 IEEE International Conference on Portable Information Devices","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129038246","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
VHF-LB Vest Antenna Simulation and Design VHF-LB背心天线仿真与设计
2007 IEEE International Conference on Portable Information Devices Pub Date : 2007-05-25 DOI: 10.1109/PORTABLE.2007.28
A. Jafargholi, M. Kamyab, L. Farhoudi
{"title":"VHF-LB Vest Antenna Simulation and Design","authors":"A. Jafargholi, M. Kamyab, L. Farhoudi","doi":"10.1109/PORTABLE.2007.28","DOIUrl":"https://doi.org/10.1109/PORTABLE.2007.28","url":null,"abstract":"In this paper we proposed two vest VHF-LB antenna designs and compare it with whip antenna. We simulated the variety of situations for user, such as standing, sitting and lying on the earth. Measurements results of prototype implementation confirm the simulations.","PeriodicalId":426585,"journal":{"name":"2007 IEEE International Conference on Portable Information Devices","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130204182","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Dynamic Interface Selection in Portable Multi-Interface Terminals 便携式多接口终端的动态接口选择
2007 IEEE International Conference on Portable Information Devices Pub Date : 2007-05-25 DOI: 10.1109/PORTABLE.2007.43
M.K. Sowmia Devi, P. Agrawal
{"title":"Dynamic Interface Selection in Portable Multi-Interface Terminals","authors":"M.K. Sowmia Devi, P. Agrawal","doi":"10.1109/PORTABLE.2007.43","DOIUrl":"https://doi.org/10.1109/PORTABLE.2007.43","url":null,"abstract":"This paper addresses the problem of dynamic interface selection in a terminal embedded with multiple interfaces. A mathematical model, to select the best interface for a particular application at a given instant, is described. It takes into consideration the available access networks and their characteristics. A handoff algorithm, for transparently switching active sessions between interfaces, is proposed.","PeriodicalId":426585,"journal":{"name":"2007 IEEE International Conference on Portable Information Devices","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133124696","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 18
Invasion of Inductor and Capacitor Chips in the Design of Antennas and Platform Integrations 电感和电容芯片在天线和平台集成设计中的入侵
2007 IEEE International Conference on Portable Information Devices Pub Date : 2007-05-25 DOI: 10.1109/PORTABLE.2007.25
Bing A. Chiang, T. Liu
{"title":"Invasion of Inductor and Capacitor Chips in the Design of Antennas and Platform Integrations","authors":"Bing A. Chiang, T. Liu","doi":"10.1109/PORTABLE.2007.25","DOIUrl":"https://doi.org/10.1109/PORTABLE.2007.25","url":null,"abstract":"Inductor and capacitor chips have found new applications in the antenna domain. Antennas can be designed faster utilizing these chips. Examples are given to show how chips are used on single antennas, smart antennas, Shelton-Butler matrix MIMO antenna feed networks, platform integration, and simplifying of manufacturing setups. The invasion impacts two important metrics of the wireless business: reducing cost, and minimizing the time to market.","PeriodicalId":426585,"journal":{"name":"2007 IEEE International Conference on Portable Information Devices","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131642148","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Package Size Reduction & Solder Joint Reliability for High Density Semiconductor Packaging 高密度半导体封装的封装尺寸减小与焊点可靠性
2007 IEEE International Conference on Portable Information Devices Pub Date : 2007-05-25 DOI: 10.1109/PORTABLE.2007.50
J. C. Barrett, M. J. Reynolds
{"title":"Package Size Reduction & Solder Joint Reliability for High Density Semiconductor Packaging","authors":"J. C. Barrett, M. J. Reynolds","doi":"10.1109/PORTABLE.2007.50","DOIUrl":"https://doi.org/10.1109/PORTABLE.2007.50","url":null,"abstract":"Semiconductor packaging development for high volume consumer products poses many unique challenges across several technical disciplines in order to deliver the performance, cost, and reliability targets demanded in today's markets. In this paper, we will focus on the challenges around implementing compact Plastic Ball Grid Array (PBGA) package solutions for semiconductor devices considering the interdependencies of printed circuit motherboard technology, motherboard assembly processes, and reliability requirements for the mobile personal computer market segment. The focus will be on interconnect density, package size and product requirements and strategies for balancing each of these considerations. The discussion includes an examination of the trade offs around various strategies for package size reduction and how they apply to different markets.","PeriodicalId":426585,"journal":{"name":"2007 IEEE International Conference on Portable Information Devices","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115328984","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Interactive Multitask Credit Card Technology 交互式多任务信用卡技术
2007 IEEE International Conference on Portable Information Devices Pub Date : 2007-05-25 DOI: 10.1109/PORTABLE.2007.66
M. Rippen, H. Braunstein, C. Nelson, C. Schuck, P. Guillaud, P. Blott
{"title":"Interactive Multitask Credit Card Technology","authors":"M. Rippen, H. Braunstein, C. Nelson, C. Schuck, P. Guillaud, P. Blott","doi":"10.1109/PORTABLE.2007.66","DOIUrl":"https://doi.org/10.1109/PORTABLE.2007.66","url":null,"abstract":"The convergence of several technologies has allowed the electronics industry to introduce the next generation of interactive multi-tasking financial transaction cards, with embedded power and processing capabilities. The credit card started as a magnetized data plate carrying the owners name, the account number, and the store(s) where it could be used. Several generations of credit cards have come and gone since then. The next generation of credit card-smart cards-incorporate micro processing and data storage capability and provide enhanced security for financial transactions. Smart Cards have not yet gained significant market share in the United States (U.S.). This lack of market penetration is due, in part, for the need to provide power and communications from the card reader to access the smart chip, as well as the perceived lack of apparent value added, given the cost to upgrade an extensive network of card readers to facilitate that functionality. This paper will deal with the next generation credit card. Advances in robust micro-circuitry, nanotechnology, displays, speakers, switches, and battery technology have led to the development of credit/debit cards with significantly enhanced capabilities. By introducing an embedded power source, a credit card can be used to provide novel modes of communication, such as the ability to play audio files or produce complex audio encrypted data and validate the authenticity of the transaction.","PeriodicalId":426585,"journal":{"name":"2007 IEEE International Conference on Portable Information Devices","volume":"122 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115883131","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Wireless Wearable Embedded System for Logistics Based On IEEE 802.15.4. 基于IEEE 802.15.4的无线可穿戴嵌入式物流系统。
2007 IEEE International Conference on Portable Information Devices Pub Date : 2007-05-25 DOI: 10.1109/PORTABLE.2007.29
F. Bonizzi, L. Sedoni, D. Sganzerla, U. Manzoli, P. Pavan
{"title":"A Wireless Wearable Embedded System for Logistics Based On IEEE 802.15.4.","authors":"F. Bonizzi, L. Sedoni, D. Sganzerla, U. Manzoli, P. Pavan","doi":"10.1109/PORTABLE.2007.29","DOIUrl":"https://doi.org/10.1109/PORTABLE.2007.29","url":null,"abstract":"In this paper we present the new prototype of a portable appliance to be used for logistic operations in production warehouses. It is based on a novel and innovative wireless embedded system able to read products codes; it can also guide users through the different phases of warehouse's everyday life; the system can wirelessly transfer data, service and control/command messages to and from its coupled system server. Retail markets, pharmacies, transport and logistic activities are preferred application environments. From intensive picking to packing, from load of goods from lines to lists and warehouse checks, this system enables the user to work more efficiently and ergonomically.","PeriodicalId":426585,"journal":{"name":"2007 IEEE International Conference on Portable Information Devices","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116916120","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Transcoding Server for the Home Domain 主域的转码服务器
2007 IEEE International Conference on Portable Information Devices Pub Date : 2007-05-25 DOI: 10.1109/PORTABLE.2007.46
François Caron, S. Coulombe, Tao Wu
{"title":"A Transcoding Server for the Home Domain","authors":"François Caron, S. Coulombe, Tao Wu","doi":"10.1109/PORTABLE.2007.46","DOIUrl":"https://doi.org/10.1109/PORTABLE.2007.46","url":null,"abstract":"This paper discusses the implementation of a video transcoding service for the Home Domain. The Home Domain is composed of personal computers, consumer electronics and mobile devices that communicate with each other via an IP network. However, due to the diversity of the capabilities of these devices (formats supported, memory, processing power, etc.), interoperability is a challenge. For instance, set-top boxes and DVD players support the MPEG-2 video format while mobile phones only support H.263 and/or MPEG-4. Adding a video transcoding service, acting as an intermediate between a digital media server and various digital media players, would allow transparent sharing of the media content within the network. This study has two main objectives. Firstly to insert transparently a transcoding service within the existing Home Domain architecture; and secondly to implement such a service using only open source software components. An FFmpeg-based video transcoding server for the Home Domain was implemented.","PeriodicalId":426585,"journal":{"name":"2007 IEEE International Conference on Portable Information Devices","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128314854","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
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