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2005 IEEE International Conference on Ultra-Wideband最新文献

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Enhancing multiband OFDM performance: capacity-approaching codes and bit loading 增强多频带OFDM性能:容量逼近码和位加载
2005 IEEE International Conference on Ultra-Wideband Pub Date : 2005-09-05 DOI: 10.1109/ICU.2005.1569955
C. Snow, L. Lampe, R. Schober
{"title":"Enhancing multiband OFDM performance: capacity-approaching codes and bit loading","authors":"C. Snow, L. Lampe, R. Schober","doi":"10.1109/ICU.2005.1569955","DOIUrl":"https://doi.org/10.1109/ICU.2005.1569955","url":null,"abstract":"In this paper we consider turbo and repeat-accumulate (RA) codes as well as bit-loading as methods of enhancing the performance of multiband OFDM, a frequency-hopping orthogonal frequency-division multiplexing system which is a strong contender for the physical layer IEEE standard for high-rate wireless personal area networks (WPANs) based on ultra-wideband (UWB) transmission. Our methodology consists of (a) development and quantification of appropriate information-theoretic performance measures, and (b) comparison of these measures with simulation results for the multiband OFDM standard proposal as well as our proposed extensions. We find that the current multiband OFDM standard proposal sufficiently exploits the frequency selectivity of the UWB channel, and that the system performs in the vicinity of the channel cutoff rate. By applying turbo codes and a reduced-complexity clustered bit-loading algorithm the system power efficiency can be improved by over 6 dB at a data rate of 480 Mbps.","PeriodicalId":105819,"journal":{"name":"2005 IEEE International Conference on Ultra-Wideband","volume":"120 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":"130853609","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: 2
A novel UWB bandpass filter and its application to UWB pulse generation 一种新型超宽带带通滤波器及其在超宽带脉冲产生中的应用
2005 IEEE International Conference on Ultra-Wideband Pub Date : 2005-09-05 DOI: 10.1109/ICU.2005.1570029
Keren Li, D. Kurita, T. Matsui
{"title":"A novel UWB bandpass filter and its application to UWB pulse generation","authors":"Keren Li, D. Kurita, T. Matsui","doi":"10.1109/ICU.2005.1570029","DOIUrl":"https://doi.org/10.1109/ICU.2005.1570029","url":null,"abstract":"This paper presented an ultra-wideband (UWB) bandpass filter using broadside-coupled microstrip-coplanar waveguide structure. The filter consists of a microstrip line coupled to a coplanar waveguide (CPW) that was fabricated on the ground of the microstrip line. The proposed filter has been simulated, fabricated and measured for UWB system. The measured results of a 3-section filter demonstrated the best UWB performance around the world; bandwidth from 3.0 GHz to 10.63 GHz ((@-10 dB); insertion loss at central frequency about 0.32 dB and very flat over the whole band; group delay, which is important to an impulse radio UWB system, about 0.42 ns over the most central bund, and less than 0.95 ns over the whole band. The filter also exhibited a good performance outside the band, both at low frequency end (to meet FCC limit) and high frequency end higher than 18 GHz with insertion loss better than 30 dB. The developed bandpass filter has been successfully applied to the UWB pulse generation. The experimental results demonstrated that a step-like negative pulse with less than 5 ps failtime, generated from a pulse generator, was reshaped through the filter as a Gaussian doublet-like UWB pulse.","PeriodicalId":105819,"journal":{"name":"2005 IEEE International Conference on Ultra-Wideband","volume":"42 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":"116287754","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: 41
Multiuser interference modeling and suppression for a multichannel differential IR-UWB system 多通道差分IR-UWB系统的多用户干扰建模与抑制
2005 IEEE International Conference on Ultra-Wideband Pub Date : 2005-09-05 DOI: 10.1109/ICU.2005.1570068
C. Steiner, K. Witrisal
{"title":"Multiuser interference modeling and suppression for a multichannel differential IR-UWB system","authors":"C. Steiner, K. Witrisal","doi":"10.1109/ICU.2005.1570068","DOIUrl":"https://doi.org/10.1109/ICU.2005.1570068","url":null,"abstract":"In a frame-differential, transmitted-reference (TR), impulse radio (IR) UWB system, operating in a dispersive multipath propagation and multi-access environment, the performance is, besides to noise, determined by the amount of inter-symbol interference (ISI) and multi-access interference (MAI). In this paper a multiuser multichannel equivalent system model accounting for ISI and MAI is derived to develop advanced detectors for these IR-UWB systems. A low complexity LMS algorithm is used to calculate optimal weighting coefficients for the fractionally-spaced, multichannel sample vectors acquired from the analog receiver front-end, to obtain an optimized decision variable. The achieved results are compared to the conventional single-channel system and to the results of a maximum likelihood sequence detection (MLSD) multiuser detection algorithm.","PeriodicalId":105819,"journal":{"name":"2005 IEEE International Conference on Ultra-Wideband","volume":"16 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":"132299581","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
Design considerations and effect of manufacturing process variations on UWB transceiver specifications 设计考虑和制造工艺变化对超宽带收发器规格的影响
2005 IEEE International Conference on Ultra-Wideband Pub Date : 2005-09-05 DOI: 10.1109/ICU.2005.1570048
R. Senguttuvan, S. Bhattacharya, A. Chatterjee
{"title":"Design considerations and effect of manufacturing process variations on UWB transceiver specifications","authors":"R. Senguttuvan, S. Bhattacharya, A. Chatterjee","doi":"10.1109/ICU.2005.1570048","DOIUrl":"https://doi.org/10.1109/ICU.2005.1570048","url":null,"abstract":"The emergence of ultra-wideband (UWB) standard for short-range communications (cable replacement in home/office environment) has drawn significant attention from the semiconductor industry. Due to the wide band of operation, designing and manufacturing efficient/cost-effective UWB devices while maintaining a tight bound on the specifications is a tough challenge. Although present day designers have access to very mature manufacturing processes (0.13 /spl mu/m), unless compensated otherwise, the inherent variations in the manufacturing process parameters can set the specifications off beyond the designed limits. This paper studies the effect of inherent process variations due to manufacturing and design choices on transceiver specifications (EVM and BER). Studies presented in this paper show that these variations can cause significant degradation in overall system performance.","PeriodicalId":105819,"journal":{"name":"2005 IEEE International Conference on Ultra-Wideband","volume":"13 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":"133747939","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
Time synchronization in UWB ad hoc networks using TOA estimation 基于TOA估计的超宽带自组网时间同步
2005 IEEE International Conference on Ultra-Wideband Pub Date : 2005-09-05 DOI: 10.1109/ICU.2005.1570031
Jean-Benoît Pierrot
{"title":"Time synchronization in UWB ad hoc networks using TOA estimation","authors":"Jean-Benoît Pierrot","doi":"10.1109/ICU.2005.1570031","DOIUrl":"https://doi.org/10.1109/ICU.2005.1570031","url":null,"abstract":"The paper deals with a synchronization scheme for ad hoc network. The proposal is a distributed synchronization algorithm based on the convergence of nodes clock parameters to a mean reference using a diffusion method. The protocol measures time of arrival (TOA) of localization techniques using pulsed UWB modulation to estimate the delays and drifts values.","PeriodicalId":105819,"journal":{"name":"2005 IEEE International Conference on Ultra-Wideband","volume":"42 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":"116922907","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
Space time MSINR-SRAKE receiver with finger assignment strategies in UWB multipath channels UWB多径信道中具有手指分配策略的空时MSINR-SRAKE接收机
2005 IEEE International Conference on Ultra-Wideband Pub Date : 2005-09-05 DOI: 10.1109/ICU.2005.1569992
Tsung-Hui Chang, Yu-jung Chang, C. Peng, Yu-Hang Lin, Chong-Yung Chi
{"title":"Space time MSINR-SRAKE receiver with finger assignment strategies in UWB multipath channels","authors":"Tsung-Hui Chang, Yu-jung Chang, C. Peng, Yu-Hang Lin, Chong-Yung Chi","doi":"10.1109/ICU.2005.1569992","DOIUrl":"https://doi.org/10.1109/ICU.2005.1569992","url":null,"abstract":"This paper proposes a space time selective RAKE (SRAKE) receiver by maximizing signal to interference-plus-noise ratio (MSINR) for ultra wideband (UWB) communications in the presence of narrowband interference (NBI) and multiple access interference. For effectively extracting the UWB signal of interest with low complexity, two finger assignment strategies (FASs), the energy-based FAS and the constrained energy-based FAS, are considered by the proposed space time MSINR-SRAKE receiver. By analysis and simulation, we show that the proposed space time MSINR-SRAKE receiver can provide larger system capacity and have better immunity to strong NBI than the existing time-only SRAKE receivers and space time SRAKE receivers.","PeriodicalId":105819,"journal":{"name":"2005 IEEE International Conference on Ultra-Wideband","volume":"18 5-6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132237991","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: 7
A novel stepped fat monopole antenna for precision location system using impulse waveform 一种用于脉冲波形精确定位系统的新型阶梯式胖单极天线
2005 IEEE International Conference on Ultra-Wideband Pub Date : 2005-09-05 DOI: 10.1109/ICU.2005.1569962
Youngjin Park, Jong-Hwa Song, Kwan-Ho Kim
{"title":"A novel stepped fat monopole antenna for precision location system using impulse waveform","authors":"Youngjin Park, Jong-Hwa Song, Kwan-Ho Kim","doi":"10.1109/ICU.2005.1569962","DOIUrl":"https://doi.org/10.1109/ICU.2005.1569962","url":null,"abstract":"This paper presents a novel planar stepped fat monopole antenna for ultra wideband (UWB) applications. A drawback of a planar fat monopole antenna, relatively narrow bandwidth is overcome using stepped arms, and then UWB behavior of the antenna is obtained. For an easy feeding, a coplanar waveguide technique is used. For optimum design in terms of return losses and constant gain, the antenna is simulated with a commercial EM simulation tool. For verification, a prototype antenna is fabricated. From the numerical and measured results, the antenna has better than 10 dB return loss in the bandwidth between 2.2 GHz and 7 GHz.","PeriodicalId":105819,"journal":{"name":"2005 IEEE International Conference on Ultra-Wideband","volume":"42 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":"132187960","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
Carrier-based UWB impulse radio: simplicity, flexibility, and pulser implementation in 0.18-micron CMOS 基于载波的超宽带脉冲无线电:简单，灵活，脉冲实现在0.18微米CMOS
2005 IEEE International Conference on Ultra-Wideband Pub Date : 2005-09-05 DOI: 10.1109/ICU.2005.1570026
J. Ryckaert, M. Badaroglu, C. Desset, V. De Heyn, G. ven der Plas, P. Wambacq, B. van Poucke, S. Donnay
{"title":"Carrier-based UWB impulse radio: simplicity, flexibility, and pulser implementation in 0.18-micron CMOS","authors":"J. Ryckaert, M. Badaroglu, C. Desset, V. De Heyn, G. ven der Plas, P. Wambacq, B. van Poucke, S. Donnay","doi":"10.1109/ICU.2005.1570026","DOIUrl":"https://doi.org/10.1109/ICU.2005.1570026","url":null,"abstract":"Emerging impulse-based ultra-wideband (UWB) technology shows strong advantages for the implementation of low-power transceivers. In this paper we propose a carrier-based UWB system that brings two distinctive advantages over other UWB systems: 1) lower power operation due to the fact that signal processing is optimally partitioned between analog and digital baseband; 2) better spectrum utilization enabling spectrum diversity and multi-user systems. One of the core blocks in this UWB system is the pulser that serves as the transmitter RF front-end and that serves as the template generator in the receiver. We demonstrate a carrier-based low-cost and low-power UWB pulser ASIC fabricated in a 0.18 /spl mu/m CMOS digital process. The power measurements indicate that our UWB pulser ASIC outperforms the other low-data rate solutions due to its lower baseline power consumption.","PeriodicalId":105819,"journal":{"name":"2005 IEEE International Conference on Ultra-Wideband","volume":"17 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":"133960092","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: 34
Ultra-wideband technology for defence applications 用于国防的超宽带技术
2005 IEEE International Conference on Ultra-Wideband Pub Date : 2005-09-05 DOI: 10.1109/ICU.2005.1570059
Sylvain Colson, Harold Hoff
{"title":"Ultra-wideband technology for defence applications","authors":"Sylvain Colson, Harold Hoff","doi":"10.1109/ICU.2005.1570059","DOIUrl":"https://doi.org/10.1109/ICU.2005.1570059","url":null,"abstract":"This paper deals with the use of ultra-wideband technology (restricted to impulse radio UWB) for military purpose related to radar, telecommunication or localisation. After defining what a UWB signal is, its physical features are described, as well as a few constraints relevant with the future systems. From this, some particular military applications are inferred and depicted thanks to the current work carried out at CELAR. Keeping in mind these potential applications, operational missions are presented, for which UWB technology may bring advantages. Finally, some prospects concerning studies at the DGA are considered.","PeriodicalId":105819,"journal":{"name":"2005 IEEE International Conference on Ultra-Wideband","volume":" 12","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113948428","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: 13
A novel joint channel and multi-user interference statistics estimator for UWB-IR based on Gaussian mixture model 一种基于高斯混合模型的UWB-IR联合信道和多用户干扰统计估计方法
2005 IEEE International Conference on Ultra-Wideband Pub Date : 2005-09-05 DOI: 10.1109/ICU.2005.1570066
V. Cellini, G. Doná
{"title":"A novel joint channel and multi-user interference statistics estimator for UWB-IR based on Gaussian mixture model","authors":"V. Cellini, G. Doná","doi":"10.1109/ICU.2005.1570066","DOIUrl":"https://doi.org/10.1109/ICU.2005.1570066","url":null,"abstract":"Ultra-wideband impulse radio communications have been growing rapidly over the last few years, as a promising technique for high bit-rate and multi-user transmissions over the 3-10 GHz unlicensed spectrum. In literature, multi-user interference is often approximated with a white Gaussian process and embodied in the overall noise term. However, it has been found that, in typical indoor environments, such approximation is inadequate. In this paper, we propose a new approach to characterize the interference, based on the Gaussian mixture model, which allows to derive a joint channel and multi-user interference statistics estimator, based on the iterative space-alternating generalized expectation maximization algorithm. The effectiveness of the proposed estimator is shown by means of numerical examples.","PeriodicalId":105819,"journal":{"name":"2005 IEEE International Conference on Ultra-Wideband","volume":"164 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":"124586645","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: 37
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