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

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Three-dimensional imaging of a moving target using an ultra-wideband radar with five antennas 利用五根天线的超宽带雷达对移动目标进行三维成像
2011 IEEE International Conference on Ultra-Wideband (ICUWB) Pub Date : 2011-10-24 DOI: 10.1109/ICUWB.2011.6058842
T. Sakamoto, Yuji Matsuki, Toru Sato
{"title":"Three-dimensional imaging of a moving target using an ultra-wideband radar with five antennas","authors":"T. Sakamoto, Yuji Matsuki, Toru Sato","doi":"10.1109/ICUWB.2011.6058842","DOIUrl":"https://doi.org/10.1109/ICUWB.2011.6058842","url":null,"abstract":"Ultra wideband (UWB) radar systems are a promising technology for surveillance systems. Many of the existing imaging algorithms are based on large-scale antenna arrays that are not necessarily practical because of their complexity and high cost. To resolve this difficulty, we had previously proposed an UWB radar imaging algorithm that estimates unknown 2-dimensional target shapes and motions using only three antennas. In this paper, we extend this method so that 3-dimensional target shapes and motions can be estimated. Some numerical simulations establish that the proposed method can accurately estimate the target shape even under extreme conditions.","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":"129241816","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
Performance of UWB backscatter modulation in multi-tag RFID scenario using experimental data 基于实验数据的UWB反向散射调制在多标签RFID场景下的性能
2011 IEEE International Conference on Ultra-Wideband (ICUWB) Pub Date : 2011-10-24 DOI: 10.1109/ICUWB.2011.6058891
Francesco Guidi, Nicoló Decarli, D. Dardari, C. Roblin, A. Sibille
{"title":"Performance of UWB backscatter modulation in multi-tag RFID scenario using experimental data","authors":"Francesco Guidi, Nicoló Decarli, D. Dardari, C. Roblin, A. Sibille","doi":"10.1109/ICUWB.2011.6058891","DOIUrl":"https://doi.org/10.1109/ICUWB.2011.6058891","url":null,"abstract":"Future advanced radio-frequency identification (RFID) systems are expected to provide both identification and high-definition localization of objects with improved reliability and security while maintaining low power consumption and cost. Ultrawide bandwidth (UWB) technology is a promising solution for next generation RFID systems to overcome most of the limitations of current narrow bandwidth RFID technology such as: reduced area coverage, insufficient ranging resolution for accurate localization, sensitivity to interference and scarce multiple access capability. In this paper, the UWB technology is applied to semi-passive RFID relying on backscatter modulation. The potential performance of backscatter RFID communication using UWB signals is investigated in terms of clutter suppression and multiple access capability using both simulated and experimental data.","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":"131215552","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
Passive location estimation using TOA measurements 使用TOA测量的被动位置估计
2011 IEEE International Conference on Ultra-Wideband (ICUWB) Pub Date : 2011-10-24 DOI: 10.1109/ICUWB.2011.6058839
Junyang Shen, A. Molisch
{"title":"Passive location estimation using TOA measurements","authors":"Junyang Shen, A. Molisch","doi":"10.1109/ICUWB.2011.6058839","DOIUrl":"https://doi.org/10.1109/ICUWB.2011.6058839","url":null,"abstract":"Ultra-wideband (UWB) radios offer highly accurate ranging, i.e., measurement of signal travel time. This is important for positioning (localization), in particular in indoor environments, where GPS is not available. This paper considers UWB-based positioning of passive objects, where one transmitter and multiple, distributed, receivers are employed. We consider the case where the transmitter and receivers can be synchronized, so that time-of-arrival (TOA) instead of time-difference-of-arrival (TDOA) information can be utilized. Assuming Gaussian errors for the range estimates, we propose a novel, Two-Step, Expectation Maximization (TSEM) based algorithm for the localization of the passive object. This algorithm achieves the Cramer-Rao Lower Bound (CRLB) of TOA algorithms. Simulation results show that the error variance of TSEM is much lower (often 30 dB) than that of the existing, TDOA-based, algorithms.","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":"121455788","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: 15
UWB network recognition based on impulsiveness of energy profiles 基于能量分布冲动性的超宽带网络识别
2011 IEEE International Conference on Ultra-Wideband (ICUWB) Pub Date : 2011-10-24 DOI: 10.1109/ICUWB.2011.6058856
S. Boldrini, G. Ferrante, M. Di Benedetto
{"title":"UWB network recognition based on impulsiveness of energy profiles","authors":"S. Boldrini, G. Ferrante, M. Di Benedetto","doi":"10.1109/ICUWB.2011.6058856","DOIUrl":"https://doi.org/10.1109/ICUWB.2011.6058856","url":null,"abstract":"Two important functionalities in cognitive networking are network detection and recognition. Previous investigations showed that MAC sub-layer technology-specific features may offer a simple and direct way of performing such tasks; in particular, they allow to by-pass complex physical layer feature extraction based on a simple energy detection scheme, capable of producing a time-varying profile reflecting the presence vs. absence of packets over the air interface. Beyond summarizing previous experimental evidence that confirmed the validity of the approach for technologies in the ISM band, the purpose of this work is to investigate the possibility of extending the network recognition concept to underlay networks such as Ultra Wide Band. Preliminary results of experiments on UWB signals indicate that short-term energy profiles may highlight the peculiar impulsive characteristic of IEEE 802.15.4a-like signals. Continuous vs. impulsive signals may be correctly classified based on a simple but relevant feature such as short-term energy statistics. Moreover, short-term energy statistical features, as a function of increased window duration, seem to highlight a multi-static vs. continuous behavior for impulse vs. continuous-wave radio transmissions.","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":"127111837","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 study on cooperative interference detection for UWB systems 超宽带系统协同干扰检测研究
2011 IEEE International Conference on Ultra-Wideband (ICUWB) Pub Date : 2011-10-24 DOI: 10.1109/ICUWB.2011.6058895
Takurou Hozumi, M. Fujii, Yu Watanabe
{"title":"A study on cooperative interference detection for UWB systems","authors":"Takurou Hozumi, M. Fujii, Yu Watanabe","doi":"10.1109/ICUWB.2011.6058895","DOIUrl":"https://doi.org/10.1109/ICUWB.2011.6058895","url":null,"abstract":"Ultra-WideBand (UWB) system shares the same frequency band with the other wireless communication systems. It is, however, necessary to detect the presence of the other wireless systems as primary systems in order to avoid interference to them. For this purpose, the energy detection method detects the presence of the primary system based on the observed energy at individual UWB device. On the other hand, in the cooperative-detection method, a master UWB device gathers the received signals from slave UWB devices and detects the presence of the primary system by combining the signals. However, the cooperative method does not consider spacial positions of the UWB devices and the primary system. In this paper, we propose a new detection method based on a combination of the received signals at more than two UWB devices. Although the conventional cooperative-detector provides one result, the proposed detector can provide some results for each UWB device. By computer simulations, we show an availability of the proposed method by comparing with the conventional one.","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":"127335522","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 flexible back-end with optimum threshold estimation for OOK based energy detection IR-UWB receivers 基于OOK的能量检测IR-UWB接收机的灵活后端优化阈值估计
2011 IEEE International Conference on Ultra-Wideband (ICUWB) Pub Date : 2011-10-24 DOI: 10.1109/ICUWB.2011.6058811
Qin Zhou, Z. Zou, F. Jonsson, Lirong Zheng
{"title":"A flexible back-end with optimum threshold estimation for OOK based energy detection IR-UWB receivers","authors":"Qin Zhou, Z. Zou, F. Jonsson, Lirong Zheng","doi":"10.1109/ICUWB.2011.6058811","DOIUrl":"https://doi.org/10.1109/ICUWB.2011.6058811","url":null,"abstract":"Impulse Radio Ultra-Wideband (IR-UWB) exhibits strong advantages in low power and low cost applications such as RFID and Wireless Sensor Networks. This paper presents an on-off keying (OOK) based energy detection IR-UWB receiver with focus on the back-end design. In order to optimize the receiver performance according to different multi-path environment, variable integration interval and adaptive threshold optimization are considered in the proposed back-end which is composed by a programmable timing circuit and a reconfigurable baseband processor. The timing circuit is able to generate multi-phased integration windows with wide-range variable integration interval and is implemented in 90 nm CMOS process. Novel schemes on synchronization and optimum threshold estimation are suggested for baseband processing. The proposed synchronization scheme is based on maximum energy variance (between symbol ‘0’ and ‘1’) detection, covering both the pulse level and symbol level synchronization. And the scheme for optimum threshold estimation is based on look up table, enabling low complexity implementation. System simulation with IEEE 802.15.4a channel models shows an appreciable improvement on the bit error rate (BER) performance compared with the conventional scheme.","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":"125614864","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
Exploiting pulse compression to generate an IEEE 802.15.4a-compliant UWB IR pulse with increased energy per bit 利用脉冲压缩产生符合IEEE 802.15.4a标准的超宽带红外脉冲，增加了每比特的能量
2011 IEEE International Conference on Ultra-Wideband (ICUWB) Pub Date : 2011-10-24 DOI: 10.1109/ICUWB.2011.6058879
Tamás Krébesz, G. Kolumbán, C. M. Józsa
{"title":"Exploiting pulse compression to generate an IEEE 802.15.4a-compliant UWB IR pulse with increased energy per bit","authors":"Tamás Krébesz, G. Kolumbán, C. M. Józsa","doi":"10.1109/ICUWB.2011.6058879","DOIUrl":"https://doi.org/10.1109/ICUWB.2011.6058879","url":null,"abstract":"The radio coverage is limited by the energy per bit transmitted. UWB pulses used in impulse radio are extremely short and, consequently, carry a very little energy per bit that results in an unacceptable short radio coverage. The energy per bit could be increased by enlarging the duration of UWB carrier pulse, however, this solution cannot be used because the correlation of received pulse envelope with a reference pulse defined in IEEE Std. 802.15.4a has to exceed a prescribed value. To solve the problem the pulse compression approach is proposed here where the duration of radiated UWB carrier pulse is enlarged considerably to get enough energy per bit and the duration of received UWB pulse is compressed by a matched filter at the receiver. The increased energy per bit increases the radio coverage and the envelope of compressed UWB pulse satisfies the requirements of IEEE Std. 802.15.4a. The gains in energy per bit are about 18 dB and 22 dB when the UWB pulse durations are set to 100 ns and 300 ns, respectively.","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":"124565212","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
Multiple-access interference management in TH-PPM UWB systems with pulse width randomisation 脉冲宽度随机化TH-PPM超宽带系统中的多址干扰管理
2011 IEEE International Conference on Ultra-Wideband (ICUWB) Pub Date : 2011-10-24 DOI: 10.1109/ICUWB.2011.6058818
K. Kouassi, L. Clavier, I. Doumbia, P. Rolland
{"title":"Multiple-access interference management in TH-PPM UWB systems with pulse width randomisation","authors":"K. Kouassi, L. Clavier, I. Doumbia, P. Rolland","doi":"10.1109/ICUWB.2011.6058818","DOIUrl":"https://doi.org/10.1109/ICUWB.2011.6058818","url":null,"abstract":"A new scheme to enhance the random aspect of information symbols in Time Hopping Pulse Position Modulation is proposed to reduce the catastrophic effect of collisions in multiple access. It is evaluated through analytical expressions and simulations. Multiple access interference modeling methods have been proposed in the recent literature to carry out accurately the bit error performance of these systems. The characteristic function method has been used here to derive the analytical expressions. Monte-Carlo simulations help to confirm the accuracy of the obtained expressions. The performances of this scheme and of the classical case are compared in term of Bit-error rates. The results show that the proposed scheme is a good candidate to enhance MAI avoidance.","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":"133217535","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
Lumped-element equivalent circuit models for multilayer ring resonators filters 多层环形谐振器滤波器的集总元等效电路模型
2011 IEEE International Conference on Ultra-Wideband (ICUWB) Pub Date : 2011-10-24 DOI: 10.1109/ICUWB.2011.6058898
S. Hashemi
{"title":"Lumped-element equivalent circuit models for multilayer ring resonators filters","authors":"S. Hashemi","doi":"10.1109/ICUWB.2011.6058898","DOIUrl":"https://doi.org/10.1109/ICUWB.2011.6058898","url":null,"abstract":"Cascaded block filters are proposed for ultra-wideband (UWB) applications. This class of microwave bandpass filters (BPF) is based on multilayer ring resonators (MRR) structure. The novelty of this configuration, with respect to MRR, is to improve the selectivity of the filters and introduce high order super-compact circuits. For the first time, lumped-element equivalent circuit models are introduced for both MRR structures and cascaded block filters. The mathematical model derived from the lumped circuit shows a close match with the filters frequency responses. Admittance matrix is derived and given for the analysis. Low-temperature co-fired ceramic (LTCC) is a suitable technology to implement these types of filters. Various prototypes are introduced and their frequency responses are demonstrated using electromagnetic simulation software.","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":"130414822","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
Bounds for OFDM ranging accuracy in multipath channels 多径信道OFDM测距精度边界
2011 IEEE International Conference on Ultra-Wideband (ICUWB) Pub Date : 2011-10-24 DOI: 10.1109/ICUWB.2011.6058884
Tianheng Wang, Yuan Shen, S. Mazuelas, M. Win
{"title":"Bounds for OFDM ranging accuracy in multipath channels","authors":"Tianheng Wang, Yuan Shen, S. Mazuelas, M. Win","doi":"10.1109/ICUWB.2011.6058884","DOIUrl":"https://doi.org/10.1109/ICUWB.2011.6058884","url":null,"abstract":"The performance of wireless ranging depends on both the transmission technique and the propagation channel. Understanding such dependencies is critical to the design of high-accuracy ranging algorithms for multipath propagation environments. In this paper, we focus on orthogonal frequency-division multiplexing (OFDM) systems and derive the bounds for OFDM ranging accuracy in multipath channels based on Fisher information analysis. In particular, we obtain the equivalent Fisher information (EFI) for ranging and quantify the effects of signal and channel parameters on the ranging accuracy. We then evaluate the ranging performance through numerical examples.","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":"130575359","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
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