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2005 IEEE International Conference on Ultra-Wideband最新文献

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Advanced Bayesian filtering techniques for UWB tracking systems in indoor environments 室内超宽带跟踪系统的先进贝叶斯滤波技术
2005 IEEE International Conference on Ultra-Wideband Pub Date : 2005-09-05 DOI: 10.1109/ICU.2005.1570063
B. Denis, L. Ouvry, B. Uguen, F. Tchoffo-Talom
{"title":"Advanced Bayesian filtering techniques for UWB tracking systems in indoor environments","authors":"B. Denis, L. Ouvry, B. Uguen, F. Tchoffo-Talom","doi":"10.1109/ICU.2005.1570063","DOIUrl":"https://doi.org/10.1109/ICU.2005.1570063","url":null,"abstract":"In this paper, we propose to use Bayesian filtering techniques so as to handle mobility and deal with biased times of arrivals (TOA) in indoor ultra wideband (UWB) positioning systems. More particularly, the modified extended Kalman filter (MEKF) and the modified regularized particle filter (MRPF) enable to track large biases affecting estimated radiolocation metrics due to LOS/NLOS and/or NLOS/NLOS transitions. Simulations were performed with a relevant deterministic UWB propagation model under realistic mobility assumptions. One important corollary for the appealing performances we obtained (e.g. the MEKF provides 90% of time with positioning accuracy better than 0.5 m in a \"moderate walk\" scenario) is that relaxed synchronization strategies could be adopted in UWB localizers. Indeed, the selection of secondary paths in the TOA estimation procedure, and hence, the introduction of large biases: 1) does not contradict the fine capability of UWB signals to resolve multipath profiles; 2) could enable to extend the range of UWB positioning systems in severe NLOS environments by alleviating the constraints on path detectability; and 3) does not degrade significantly the positioning accuracy if the spatial correlation of TOA biases is taken into account.","PeriodicalId":105819,"journal":{"name":"2005 IEEE International Conference on Ultra-Wideband","volume":"90 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126244025","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: 48
Nanoantennas: A concept for efficient electrically small UWB devices 纳米天线:一种高效的小型超宽带设备的概念
2005 IEEE International Conference on Ultra-Wideband Pub Date : 2005-09-05 DOI: 10.1109/ICU.2005.1569996
H. Schantz
{"title":"Nanoantennas: A concept for efficient electrically small UWB devices","authors":"H. Schantz","doi":"10.1109/ICU.2005.1569996","DOIUrl":"https://doi.org/10.1109/ICU.2005.1569996","url":null,"abstract":"This paper introduces the concept of a \"nanoantenna:\" a device that radiates UWB impulses from the discharge of a conducting enclosure antenna. By trapping exterior electrostatic energy, a nanoantenna has the potential to radiate energy more efficiently than generally believed possible, enabling efficient millimeter scale 3.1-10.6 GHz UWB devices.","PeriodicalId":105819,"journal":{"name":"2005 IEEE International Conference on Ultra-Wideband","volume":"165 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132492748","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: 10
Error analysis for a hybrid DS/TH impulse radio UWB multiple access system DS/TH混合脉冲无线电UWB多址系统误差分析
2005 IEEE International Conference on Ultra-Wideband Pub Date : 2005-09-05 DOI: 10.1109/ICU.2005.1569988
Mohammad Azizur Rahman, S. Sasaki, Jie Zhou, H. Kikuchi
{"title":"Error analysis for a hybrid DS/TH impulse radio UWB multiple access system","authors":"Mohammad Azizur Rahman, S. Sasaki, Jie Zhou, H. Kikuchi","doi":"10.1109/ICU.2005.1569988","DOIUrl":"https://doi.org/10.1109/ICU.2005.1569988","url":null,"abstract":"A hybrid direct-sequence time-hopping (DS/TH) impulse radio (IR) ultra-wideband (UWB) multiple access system is proposed and a simple error analysis is presented for the system. The error analysis facilitates to obtain simple-to-evaluate and accurate error probabilities based on Holtzman's simplified improved Gaussian approximation (SIGA), a method that has previously mainly been used in DS-CDMA. In this paper, we show that the method can also be used effectively for IR UWB multiple access systems that use signals of low duty-cycle. It is shown that despite having the same processing gain, which is the multiplication of the number of frames per bit and chips per frame, different combinations of the parameters result in different performances. System performances are presented for various duty-cycles of the signals considering equal and unequal powers of the users and the validity of standard Gaussian approximation (SGA) is examined at those situations. The theoretical results are validated by Monte Carlo simulations.","PeriodicalId":105819,"journal":{"name":"2005 IEEE International Conference on Ultra-Wideband","volume":"170 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132788636","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: 16
Ultra-wideband n-bit digitally tunable pulse generator 超宽带n位数字可调谐脉冲发生器
2005 IEEE International Conference on Ultra-Wideband Pub Date : 2005-09-05 DOI: 10.1109/ICU.2005.1570027
S. Yılmaz, I. Tekin
{"title":"Ultra-wideband n-bit digitally tunable pulse generator","authors":"S. Yılmaz, I. Tekin","doi":"10.1109/ICU.2005.1570027","DOIUrl":"https://doi.org/10.1109/ICU.2005.1570027","url":null,"abstract":"This paper presents a low-cost ultra-wideband (UWB) pulse generator that can vary the pulse duration digitally by using a step recovery diode (SRD), microstrip transmission lines and PIN diodes. First, a sharp edge is generated by using a SRD. Through the use of transmission lines and the PIN diodes, a pulse is formed from the sharp edge. Based on the number of transmission lines (N), the duration of the pulse can be varied in 2/sup N/ steps. The UWB pulse generator circuit is implemented on FR-4 substrate using microstrip line technology and UWB pulses with durations of 550 to 1750 psec are measured.","PeriodicalId":105819,"journal":{"name":"2005 IEEE International Conference on Ultra-Wideband","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122051673","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: 25
Synchronization, TOA and position estimation for low-complexity LDR UWB devices 低复杂度LDR UWB设备的同步、TOA和位置估计
2005 IEEE International Conference on Ultra-Wideband Pub Date : 2005-09-05 DOI: 10.1109/ICU.2005.1570035
P. Cheong, A. Rabbachin, J. Montillet, Kegen Yu, I. Oppermann
{"title":"Synchronization, TOA and position estimation for low-complexity LDR UWB devices","authors":"P. Cheong, A. Rabbachin, J. Montillet, Kegen Yu, I. Oppermann","doi":"10.1109/ICU.2005.1570035","DOIUrl":"https://doi.org/10.1109/ICU.2005.1570035","url":null,"abstract":"The paper provides an evaluation of a non-coherent UWB system, which is suitable for low complexity, cost and data rate UWB wireless sensor networks with positioning capability. Synchronization and time of arrival (TOA) estimation is performed using a non-coherent energy collection method. Coarse and fine synchronization are performed to identify the energy clusters and refine the energy collection window respectively. The effect of the integration window size is evaluated for both TOA estimation and position estimation. Direct method (DM) and Davidon-Fletcher-Powell (DFP) algorithms are implemented for position estimation. The result shows the possibility of attaining sub-meter performance using a low complexity and cost device.","PeriodicalId":105819,"journal":{"name":"2005 IEEE International Conference on Ultra-Wideband","volume":"110 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128617465","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: 42
A two-step search scheme for rapid and reliable UWB signal acquisition in multipath channels 多径信道下快速可靠的超宽带信号采集的两步搜索方案
2005 IEEE International Conference on Ultra-Wideband Pub Date : 2005-09-05 DOI: 10.1109/ICU.2005.1570013
Jaewoon Kim, Suckchel Yang, Y. Shin
{"title":"A two-step search scheme for rapid and reliable UWB signal acquisition in multipath channels","authors":"Jaewoon Kim, Suckchel Yang, Y. Shin","doi":"10.1109/ICU.2005.1570013","DOIUrl":"https://doi.org/10.1109/ICU.2005.1570013","url":null,"abstract":"We propose the two-step search scheme with linear search based second step (TSS-LS) by improving the conventional two-step search scheme with bit reversal search based second step (TSS-BS) for rapid and reliable acquisition of ultra wide band (UWB) signals in multipath channels. The proposed TSS-LS utilizes two different thresholds and search windows to achieve fast acquisition. Furthermore, unlike the TSS-BS in which the bit reversal algorithm is applied in both steps, the linear search is adopted for the second step in the proposed TSS-LS to correctly find the starting point in the range of effective delay spread of the multipath channels, and to obtain reliable bit error rate performance of the UWB systems.","PeriodicalId":105819,"journal":{"name":"2005 IEEE International Conference on Ultra-Wideband","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129941984","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: 10
UWB MAC and network solutions for low data rate with location and tracking applications UWB MAC和网络解决方案，用于低数据速率的定位和跟踪应用
2005 IEEE International Conference on Ultra-Wideband Pub Date : 2005-09-05 DOI: 10.1109/ICU.2005.1570083
G. Giancola, L. Blazevic, I. Bucaille, L. D. De Nardis, M. Di Benedetto, Y. Durand, G. Froc, B.M. Cuezva, Jean-Benoît Pierrot, P. Pirinen, N. Rinaldi
{"title":"UWB MAC and network solutions for low data rate with location and tracking applications","authors":"G. Giancola, L. Blazevic, I. Bucaille, L. D. De Nardis, M. Di Benedetto, Y. Durand, G. Froc, B.M. Cuezva, Jean-Benoît Pierrot, P. Pirinen, N. Rinaldi","doi":"10.1109/ICU.2005.1570083","DOIUrl":"https://doi.org/10.1109/ICU.2005.1570083","url":null,"abstract":"The object of this paper is to present the main results achieved during the first fifteen months of the 6th framework European Union integrated research project PULSERS [1], regarding ultra wide band (UWB) medium access control (MAC) and network layer issues for low data rate with location and tracking (LDR-LT) applications. Various intended UWB system architectures and their key requirements and parameters are introduced. For such systems, potential MAC schemes and network solutions are illustrated and discussed. New ideas about wireless UWB access, synchronization, resource allocation, and topology management are also presented.","PeriodicalId":105819,"journal":{"name":"2005 IEEE International Conference on Ultra-Wideband","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130002334","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
Data rate upper bounds for UWB link with IEEE 802.15.3a channel model 采用IEEE 802.15.3a信道模型的UWB链路数据速率上限
2005 IEEE International Conference on Ultra-Wideband Pub Date : 2005-09-05 DOI: 10.1109/ICU.2005.1570084
Mohamed Kamoun, Sylvain Chaillou, J. Gosteau, Laurent Mazet, M. D. Courville, Pierre Duhamel
{"title":"Data rate upper bounds for UWB link with IEEE 802.15.3a channel model","authors":"Mohamed Kamoun, Sylvain Chaillou, J. Gosteau, Laurent Mazet, M. D. Courville, Pierre Duhamel","doi":"10.1109/ICU.2005.1570084","DOIUrl":"https://doi.org/10.1109/ICU.2005.1570084","url":null,"abstract":"In this contribution a derivation of an expression for the capacity of an ultra wide band (UWB) system is provided, taking into account both the attenuation due to the distance and some channel models proposed within the IEEE 802.15.3a task group. The goal is to get a tight upper bound on the achievable throughput with an UWB transceiver where terminals are at a given distance: the capacity converges to a given limit depending on the channel model characteristics when increasing infinitely the bandwidth.","PeriodicalId":105819,"journal":{"name":"2005 IEEE International Conference on Ultra-Wideband","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130679007","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: 6
High rate UWB transmission with range extension 具有范围扩展的高速率UWB传输
2005 IEEE International Conference on Ultra-Wideband Pub Date : 2005-09-05 DOI: 10.1109/ICU.2005.1570080
Xiaoming Peng, Khiam-Boon Png, V. Srivastava, F. Chin
{"title":"High rate UWB transmission with range extension","authors":"Xiaoming Peng, Khiam-Boon Png, V. Srivastava, F. Chin","doi":"10.1109/ICU.2005.1570080","DOIUrl":"https://doi.org/10.1109/ICU.2005.1570080","url":null,"abstract":"Extension of range is a critical factor in ultra wideband (UWB) research as the range is limited in the normal case of wireless personal area networks (WPAN) applications due to the FCC mask and power transmission level constraints. As per the IEEE 802.15.3a technical requirement, the expected range at 200 Mbps is about 4 m. The main objective of the project described in this paper is to demonstrate wireless communication at high data rate, e.g. 200 Mbps, with an enhanced range capability using UWB technology. The key deliverables are FPGA based, multi-band OFDM alliance (MBOA) standard compliant UWB transceiver prototypes - with USB interfaces - capable of high data rate UWB communications among multiple devices. An enhanced range of up to 8 m is demonstrated with a suitable video streaming application.","PeriodicalId":105819,"journal":{"name":"2005 IEEE International Conference on Ultra-Wideband","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130833310","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: 4
Effect of beampattern on directional beacon based position location algorithm for UWB systems 波束方向对超宽带定向信标定位算法的影响
2005 IEEE International Conference on Ultra-Wideband Pub Date : 2005-09-05 DOI: 10.1109/ICU.2005.1569995
S.F.A. Shah, A. Tewfik
{"title":"Effect of beampattern on directional beacon based position location algorithm for UWB systems","authors":"S.F.A. Shah, A. Tewfik","doi":"10.1109/ICU.2005.1569995","DOIUrl":"https://doi.org/10.1109/ICU.2005.1569995","url":null,"abstract":"Motivated from the results of previous studies, we aim to evaluate the effect of antenna beampattern on the performance of directional beacon based position location algorithm in this paper. We make use of earliest arrivals to detect the line of sight components. Directional beacons are generated using four element uniform linear antenna array (ULA) at the transmitting nodes. To achieve narrow beamwidth, we design the beampattern using Dolph-Chebyshev method that provides a way to tradeoff beamwidth for sidelobes level in an optimum manner. Simulation results show that the minimum error in time estimation (consequently position location) does not occur at the minimum beamwidth. The increase in range estimation error at the minimum beamwidth is due to the significant sidelobes level at this point. Through simulation results, we show that the minimum error in range estimation occurs at 0.33 rad beamwidth for 20 dB SNR case.","PeriodicalId":105819,"journal":{"name":"2005 IEEE International Conference on Ultra-Wideband","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126544660","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
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