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2011 IEEE International Conference on Ultra-Wideband (ICUWB)最新文献

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New UWB free-space method for the classification and characterization of dielectric objects 一种新的超宽带自由空间方法用于介质物体的分类和表征
2011 IEEE International Conference on Ultra-Wideband (ICUWB) Pub Date : 2011-10-24 DOI: 10.1109/ICUWB.2011.6058868
H. Mextorf, F. Daschner, M. Kent, R. Knoechel
{"title":"New UWB free-space method for the classification and characterization of dielectric objects","authors":"H. Mextorf, F. Daschner, M. Kent, R. Knoechel","doi":"10.1109/ICUWB.2011.6058868","DOIUrl":"https://doi.org/10.1109/ICUWB.2011.6058868","url":null,"abstract":"This paper presents a new approach for the accurate free-space characterization of irregularly shaped and arbitrarily oriented dielectric objects. The objects under test are illuminated by UWB-pulses and the scattered pulses are collected by an array of receiving antennas. The scattered pulses contain information about the geometrical properties as well as the dielectric properties; a multivariate calibration method is supposed to be able to separate these properties. A classification algorithm is applied prior to the multivariate calibration. It provides a classification into two classes, low or high permittivity. The statistical calibration method is then applied separately in each class. This leads to a significant improvement of the accuracy of the determination of the dielectric properties compared to processing without classification.","PeriodicalId":143107,"journal":{"name":"2011 IEEE International Conference on Ultra-Wideband (ICUWB)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2011-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127136569","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
A new approach to time-of-arrival estimation based on information theoretic criteria 基于信息论准则的到达时间估计新方法
2011 IEEE International Conference on Ultra-Wideband (ICUWB) Pub Date : 2011-10-24 DOI: 10.1109/ICUWB.2011.6058886
A. Giorgetti, M. Chiani
{"title":"A new approach to time-of-arrival estimation based on information theoretic criteria","authors":"A. Giorgetti, M. Chiani","doi":"10.1109/ICUWB.2011.6058886","DOIUrl":"https://doi.org/10.1109/ICUWB.2011.6058886","url":null,"abstract":"Existing energy detector (ED)-based methods for time-of-arrival (ToA) estimation in ultrawide band (UWB) impulse radios (IRs) use a threshold to discriminate the time bins containing noise from those containing signal plus noise. For these threshold crossing (TC) methods the key problem is the design of the threshold level to obtain the best possible ranging accuracy. Threshold design for TC methods is a difficult problem, and requires receiver noise power knowledge. We here propose a completely different approach, where there is no threshold and where the noise power knowledge is not required. Our blind and robust ToA estimation technique is based on information theoretic criteria (ITC). The proposed ToA algorithm is universal, in that it does not require any information about the channel or the noise power level, and it eliminates the need to set a predefined threshold. The performance of the proposed universal ToA estimator is evaluated in realistic multipath channels, revealing excellent performance and robustness.","PeriodicalId":143107,"journal":{"name":"2011 IEEE International Conference on Ultra-Wideband (ICUWB)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2011-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117229346","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
Passive network localization via UWB wireless sensor radars: The impact of TOA estimation 基于超宽带无线传感器雷达的无源网络定位:TOA估计的影响
2011 IEEE International Conference on Ultra-Wideband (ICUWB) Pub Date : 2011-10-24 DOI: 10.1109/ICUWB.2011.6058840
Stefania Bartoletti, A. Conti
{"title":"Passive network localization via UWB wireless sensor radars: The impact of TOA estimation","authors":"Stefania Bartoletti, A. Conti","doi":"10.1109/ICUWB.2011.6058840","DOIUrl":"https://doi.org/10.1109/ICUWB.2011.6058840","url":null,"abstract":"Passive network localization via wireless sensor radars (WSRs) is rising interest for applications in civilian, commercial, and military sectors. A clear understanding on how impairments and system parameters affect detection and localization accuracy is fundamental for the WSR network design. We introduce a mathematical framework for the analysis of WSR network which allows to consider different scenarios, network topologies, and system configurations. We focus on the effects of ultra-wide bandwidth (UWB) time-of-arrival estimation on the localization accuracy. We present results for a case study of UWB monostatic radars network with application in logistics.","PeriodicalId":143107,"journal":{"name":"2011 IEEE International Conference on Ultra-Wideband (ICUWB)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2011-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117229894","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
Low-complexity MAP based channel support estimation for Impulse Radio Ultra-Wideband (IR-UWB) communications 脉冲无线电超宽带(IR-UWB)通信低复杂度MAP信道支持估计
2011 IEEE International Conference on Ultra-Wideband (ICUWB) Pub Date : 2011-10-24 DOI: 10.1109/ICUWB.2011.6058866
S. Ahmed, T. Al-Naffouri, A. Muqaibel
{"title":"Low-complexity MAP based channel support estimation for Impulse Radio Ultra-Wideband (IR-UWB) communications","authors":"S. Ahmed, T. Al-Naffouri, A. Muqaibel","doi":"10.1109/ICUWB.2011.6058866","DOIUrl":"https://doi.org/10.1109/ICUWB.2011.6058866","url":null,"abstract":"The paper addresses the problem of channel estimation in Impluse-Radio Ultra-Wideband (IR-UWB) communication system. The IEEE 802.15.4a channel model is used where the channel is assumed to be Linear Time Invariant (LTI) and thus the problem of channel estimation becomes the estimation of the sparse channel taps and their delays. Since, the bandwidth of the signal is very large, Nyquist rate sampling is impractical, therefore, we propose to estimate the channel taps from the sub-sampled versions of the received signal profile. We adopt the Bayesian framework to estimate the channel support by incorporating the a priori multipath arrival time statistics. In the first approach, we adopt a two-step method by employing Compressive Sensing to obtain coarse estimates and then refine them by applying Maximum A Posteriori (MAP) criterion. In the second approach, we develop a Low-Complexity MAP (LC-MAP) estimator. The computational complexity is reduced by identifying nearly orthogonal clusters in the received profile and by leveraging the structure of the sensing matrix.","PeriodicalId":143107,"journal":{"name":"2011 IEEE International Conference on Ultra-Wideband (ICUWB)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2011-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126811614","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
A fully integrated 19 pJ/pulse UWB transmitter for biomedical applications implemented in 65 nm CMOS technology 一个完全集成的19 pJ/脉冲超宽带发射机，用于65纳米CMOS技术实现的生物医学应用
2011 IEEE International Conference on Ultra-Wideband (ICUWB) Pub Date : 2011-10-24 DOI: 10.1109/ICUWB.2011.6058925
O. Novák, C. Charles, Richard B. Brown
{"title":"A fully integrated 19 pJ/pulse UWB transmitter for biomedical applications implemented in 65 nm CMOS technology","authors":"O. Novák, C. Charles, Richard B. Brown","doi":"10.1109/ICUWB.2011.6058925","DOIUrl":"https://doi.org/10.1109/ICUWB.2011.6058925","url":null,"abstract":"A fully integrated power-efficient CMOS pulsed ultra-wideband (I-UWB) transmitter for biomedical applications operating in the 3 – 5 GHz band is implemented in a 65 nm CMOS technology. The UWB transmitter adopts a low-complexity ring oscillator-based pulse generator architecture and pulse-position-modulation (PPM) for increased power efficiency and minimal silicon area. The transmitter consumes zero static bias power and achieves an energy efficiency of 19 pJ/pulse at 200 MHz pulse repetition frequency (PRF) while occupying 68 × 68 µm2 of silicon area.","PeriodicalId":143107,"journal":{"name":"2011 IEEE International Conference on Ultra-Wideband (ICUWB)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2011-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116860482","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
Design and implementation of advanced algorithms for MIMO-UWB wireless communications MIMO-UWB无线通信先进算法的设计与实现
2011 IEEE International Conference on Ultra-Wideband (ICUWB) Pub Date : 2011-10-24 DOI: 10.1109/ICUWB.2011.6058847
E. Dimitrov, C. Kupferschmidt, T. Kaiser, J. Korpi, R. Nordman, A. Anttonen, A. Giorgetti, M. Chiani
{"title":"Design and implementation of advanced algorithms for MIMO-UWB wireless communications","authors":"E. Dimitrov, C. Kupferschmidt, T. Kaiser, J. Korpi, R. Nordman, A. Anttonen, A. Giorgetti, M. Chiani","doi":"10.1109/ICUWB.2011.6058847","DOIUrl":"https://doi.org/10.1109/ICUWB.2011.6058847","url":null,"abstract":"This paper describes the design and implementation of low-complexity multiple-input multiple-output (MIMO) signal processing techniques suitable for ultra-wideband (UWB) wireless communications. It provides the general system concept, description of the measurement set-up and modular FPGA platform for test and verification of the proposed multiple antenna schemes under real air-interface environment. We validate the performance of selected spatial multiplexing and diversity approaches applied to Multi-Band Orthogonal Frequency Division Multiplexing (MB-OFDM) and demonstrate the enhancements in capacity and link reliability of existing WiMedia devices through algorithm- and implementation-level investigations.","PeriodicalId":143107,"journal":{"name":"2011 IEEE International Conference on Ultra-Wideband (ICUWB)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2011-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114043148","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
Multiuser and multipath interference mitigation in UWB TOA estimation 超宽带TOA估计中的多用户和多径干扰抑制
2011 IEEE International Conference on Ultra-Wideband (ICUWB) Pub Date : 2011-10-24 DOI: 10.1109/ICUWB.2011.6058887
Adria Gusi Amigo, A. Mallat, L. Vandendorpe
{"title":"Multiuser and multipath interference mitigation in UWB TOA estimation","authors":"Adria Gusi Amigo, A. Mallat, L. Vandendorpe","doi":"10.1109/ICUWB.2011.6058887","DOIUrl":"https://doi.org/10.1109/ICUWB.2011.6058887","url":null,"abstract":"In this paper we consider the impact of MUI (multiuser interference) on coherent TOA (time of arrival) estimation. We consider TH-PPM (time-hopping pulse position modulation). We propose estimators based on the ML (maximum likelihood) criterion together with interference cancellation. We propose algorithms for SP (single-path) and MP (multipath) communication channels. We report simulation results and we conclude that the proposed estimators obtain smaller variance than the per-user ML estimator. Moreover, with well-chosen signature parameters, it is possible to reach the CRB (Cramèr-Rao bound) when multiple sources are transmitting in SP channels and values close to the CRB in MP channels. We also show that the interference cancellation technique makes the estimation robust against near-far situations.","PeriodicalId":143107,"journal":{"name":"2011 IEEE International Conference on Ultra-Wideband (ICUWB)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2011-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121830126","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
UWB radar imaging based multipath delay prediction for NLOS position estimation 基于超宽带雷达成像的NLOS位置多径延迟预测
2011 IEEE International Conference on Ultra-Wideband (ICUWB) Pub Date : 2011-10-24 DOI: 10.1109/ICUWB.2011.6058804
H. Luecken, A. Wittneben
{"title":"UWB radar imaging based multipath delay prediction for NLOS position estimation","authors":"H. Luecken, A. Wittneben","doi":"10.1109/ICUWB.2011.6058804","DOIUrl":"https://doi.org/10.1109/ICUWB.2011.6058804","url":null,"abstract":"Conventional Time-of-Arrival (ToA) based Ultra-Wideband (UWB) positioning suffers strongly from multipath. Harsh propagation environments or non-line-of-sight (NLOS) situations lead to biased position estimates with high estimation errors. To overcome this problem, we propose a radar imaging based method to predict delays of dominant propagation paths. This is done in a three-step approach: First, a radar image of the environment is created using measured training data. We generate a scattering coefficient map with the large synthetic aperture of distributed and moving antennas. The training data can easily be obtained from channel estimates of a UWB communication system with mobile nodes. Second, the radar image is used to reconstruct path gains and path delays. Thus, the channel response is predicted for arbitrary transmitter and receiver positions. Finally, dominant multipath delays are extracted using WRELAX. The proposed algorithm is validated by anechoic chamber measurements with controlled reflectors. Moreover, an extensive measurement campaign in a laboratory/office environment shows that strong paths can be predicted with nanosecond accuracy in a real world scenario.","PeriodicalId":143107,"journal":{"name":"2011 IEEE International Conference on Ultra-Wideband (ICUWB)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2011-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123399432","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: 11
Performance investigation of MMSE-based interference alignment for multiuser MIMO UWB 基于mmse的多用户MIMO超宽带干扰对准性能研究
2011 IEEE International Conference on Ultra-Wideband (ICUWB) Pub Date : 2011-10-24 DOI: 10.1109/ICUWB.2011.6058820
C. Le, E. Dimitrov, S. Moghaddamnia, T. Kaiser
{"title":"Performance investigation of MMSE-based interference alignment for multiuser MIMO UWB","authors":"C. Le, E. Dimitrov, S. Moghaddamnia, T. Kaiser","doi":"10.1109/ICUWB.2011.6058820","DOIUrl":"https://doi.org/10.1109/ICUWB.2011.6058820","url":null,"abstract":"To achieve the full multiplexing gains or the degrees of freedom of the K-multiuser MIMO interference channel, the interference alignment technique has been proposed and investigated. The main idea of interference alignment is to design the pre-coder at each transmitter, so that each receiver can align all interference from undesired transmitters in interference subspaces by exploiting knowledge of the channel state information (CSI) of all transmission links. Currently, a closed-form solution for the pre-coding filters exists only for the case of up to three users and provides poor sum-rate performance compared to iterative algorithms. Furthermore, all available algorithms for interference alignment were investigated only for the case, where each transmitter sends only one data stream. In this paper, the MMSE-based interference alignment is exploited to improve the BER and sum-rate performance of the system especially in the low SNR regime. This paper focuses on a multiuser MIMO UWB system based on MB-OFDM with arbitrary number of independent data streams per user. The simulation results confirm that the MMSE-based interference alignment provides sum-rate and BER superior to Orthogonal Frequency-Division Multiple Access (OFDMA) at marginal performance degradation.","PeriodicalId":143107,"journal":{"name":"2011 IEEE International Conference on Ultra-Wideband (ICUWB)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2011-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130006129","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
Joint antenna-channel statistical modelling of UWB backscattering RFID UWB后向散射RFID联合天线信道统计建模
2011 IEEE International Conference on Ultra-Wideband (ICUWB) Pub Date : 2011-10-24 DOI: 10.1109/ICUWB.2011.6058889
A. Sibille, M. Sacko, Z. Mhanna, Francesco Guidi, C. Roblin
{"title":"Joint antenna-channel statistical modelling of UWB backscattering RFID","authors":"A. Sibille, M. Sacko, Z. Mhanna, Francesco Guidi, C. Roblin","doi":"10.1109/ICUWB.2011.6058889","DOIUrl":"https://doi.org/10.1109/ICUWB.2011.6058889","url":null,"abstract":"ultra wide band semi-passive RFID based on a backscattering principle promise an excellent trade-off in terms of cost, range and localization capability. However, this trade-off will be deeply impacted by the characteristics of the backscattering, which involves both the propagation channel and the tag antenna mode behaviour. This work addresses the joint modelling of both, starting from rigorous electromagnetic principles. It highlights the necessity to combine the tag randomness with that of the channel, especially in the angular and polarization domains. It also sketches some routes towards this modelling.","PeriodicalId":143107,"journal":{"name":"2011 IEEE International Conference on Ultra-Wideband (ICUWB)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2011-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124140685","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: 9
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