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2012 IEEE International Conference on Ultra-Wideband最新文献

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Honey- bees mating algorithm applied to feasible design target space for a wide- band front- end amplifier 将蜜蜂交配算法应用于宽带前端放大器目标空间的可行设计
2012 IEEE International Conference on Ultra-Wideband Pub Date : 2012-11-12 DOI: 10.1109/ICUWB.2012.6340411
P. Mahouti, F. Güneş, S. Demirel
{"title":"Honey- bees mating algorithm applied to feasible design target space for a wide- band front- end amplifier","authors":"P. Mahouti, F. Güneş, S. Demirel","doi":"10.1109/ICUWB.2012.6340411","DOIUrl":"https://doi.org/10.1109/ICUWB.2012.6340411","url":null,"abstract":"In this article, the feasible design target space is determined for the input stage-requirements of an ultra-wide band low-noise front end design using a single transistor. The problem is set as an optimization problem where honey-bees mating have been used as search and optimization tool within in the problem domain. The primary reason to use this algorithm is ease of its use, broad applicability and global perspective. The honey-bee mating process has been considered as a typical swarm-based approach to optimization, in which the search algorithm is inspired by the process of honey-bee mating in real life. In this paper, the honey-bee mating (HBMO) algorithm is presented as a new meta-heuristic optimizationtool to determine design target space for a microwave amplifier subject to the potential performance of the employed transistor.","PeriodicalId":260071,"journal":{"name":"2012 IEEE International Conference on Ultra-Wideband","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116890757","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
Multiuser interference mitigation in time-hopped ultra-wideband Receivers 时跳超宽带接收机中的多用户干扰抑制
2012 IEEE International Conference on Ultra-Wideband Pub Date : 2012-11-12 DOI: 10.1109/ICUWB.2012.6340472
D. J. Young, N. Beaulieu
{"title":"Multiuser interference mitigation in time-hopped ultra-wideband Receivers","authors":"D. J. Young, N. Beaulieu","doi":"10.1109/ICUWB.2012.6340472","DOIUrl":"https://doi.org/10.1109/ICUWB.2012.6340472","url":null,"abstract":"Offering a large bandwidth under strict transmission power limits, UWB communications can overcome the spectral congestion and consequent performance impairment experienced by narrowband devices operating in common unlicensed frequency bands. The impulse radio (IR) class of UWB systems typically uses time-hopping (TH) and repetition codes. The TH scheme is intended to prevent catastrophic interference between TH-UWB transmissions. However, in applications where several UWB devices are located at close range, multiple-user interference (MUI) can impair uncoordinated transmissions. In particular, a conventional receiver does not properly exploit the TH code and performs poorly in the presence of strong MUI. In this paper, the properties of MUI in TH-UWB are reviewed, and two classes of techniques for mitigation of this MUI are presented. The first class uses statistical characterizations of the MUI-plus-AWGN disturbance as a basis for receiver design, leading to improved nonlinear receiver structures. The second class uses interference-sensing techniques specifically developed for TH-UWB radio, which control combining of pulse replicas at the receiver. Both methods lead to greatly improved bit error rate performance versus the conventional receiver. Different implementations are presented for each class, and the complexity and performance of each implementation is discussed. Both types of interference mitigation can be powerfully and efficiently used in a single receiver, and composite receiver designs are shown that provide superior performance.","PeriodicalId":260071,"journal":{"name":"2012 IEEE International Conference on Ultra-Wideband","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128337330","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
Bandwidth requirement for suppression of grating lobes in ultrawideband antenna arrays 超宽带天线阵列中抑制光栅瓣的带宽要求
2012 IEEE International Conference on Ultra-Wideband Pub Date : 2012-11-12 DOI: 10.1109/ICUWB.2012.6340438
V. Sipal, D. Edwards, B. Allen
{"title":"Bandwidth requirement for suppression of grating lobes in ultrawideband antenna arrays","authors":"V. Sipal, D. Edwards, B. Allen","doi":"10.1109/ICUWB.2012.6340438","DOIUrl":"https://doi.org/10.1109/ICUWB.2012.6340438","url":null,"abstract":"Sparse ultrawideband antenna arrays suppress the grating lobes due to the fact that the duration of pulses processed by individual antenna elements is too short to constructively superpose them in the time domain. Such arrays represent an attractive option for design of many low-comlexity low-cost ultrawideband systems, where narrow beamwidth is achieved by increase of element spacing. This paper empirically explores the minimum bandwidth required for suppression of the grating lobes. It is found that the relative bandwidth required to suppress grating lobes is independent on the centre frequency, element spacing, and number of elements. There is a weak dependency of the bandwidth on the type of the pulse used, but the general conclusion is that the relative bandwidth has to exceed 100% in order to suppress the grating lobes. It is, however, noted that whilst sparse array with a low number of antenna elements can suppress the grating lobes and posses a narrow beam, the compromise for this feature is a reduction of the level of spatial filtering between the main lobe and other directions, when compared to arrays where grating lobes are suppressed by dense spacing.","PeriodicalId":260071,"journal":{"name":"2012 IEEE International Conference on Ultra-Wideband","volume":"93 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124558213","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
Preliminary study on noncooperative positioning using UWB impulse radio 超宽带脉冲无线电非合作定位的初步研究
2012 IEEE International Conference on Ultra-Wideband Pub Date : 2012-11-12 DOI: 10.1109/ICUWB.2012.6340443
Wenyan Liu, Hong Ding, Xiaotao Huang, Xiangyang Li, Jibing Yuan
{"title":"Preliminary study on noncooperative positioning using UWB impulse radio","authors":"Wenyan Liu, Hong Ding, Xiaotao Huang, Xiangyang Li, Jibing Yuan","doi":"10.1109/ICUWB.2012.6340443","DOIUrl":"https://doi.org/10.1109/ICUWB.2012.6340443","url":null,"abstract":"Impulse radio ultra wideband (IR UWB) is a promising technology for positioning. Many papers about UWB positioning focus on cooperative target. The study considers UWB positioning for noncooperative target, which means that the target is passive and does not transmit signal. There are few papers in the literature on the field. Existing papers place great emphasis on positioning algorithms instead of time based ranging techniques. In addition, they do not pay much attention on the propagation characteristics of the IR UWB signal in the special usage scenario, which is different from that in cooperative positioning. In the study, we present our understanding on the field. First, we point the importance of TOA estimation in noncooperative positioning. Then, we propose a novel UWB channel to explore the signal propagation characteristics. It is a two-stage cascade multipath channel. In the simulation, energy detection receiver is used to estimate the TOA of the special direct path.","PeriodicalId":260071,"journal":{"name":"2012 IEEE International Conference on Ultra-Wideband","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120955842","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
On the range of Wimedia OFDM UWB wireless 关于Wimedia OFDM UWB无线的范围
2012 IEEE International Conference on Ultra-Wideband Pub Date : 2012-11-12 DOI: 10.1109/ICUWB.2012.6340440
V. Sipal, D. Edwards, B. Allen
{"title":"On the range of Wimedia OFDM UWB wireless","authors":"V. Sipal, D. Edwards, B. Allen","doi":"10.1109/ICUWB.2012.6340440","DOIUrl":"https://doi.org/10.1109/ICUWB.2012.6340440","url":null,"abstract":"We show a significant discrepancy between the range estimates and the actual performance of an ultrawideband wireless system based on the Wimedia standard. We also show this discrepancy to be linked to the combination of frequency selectivity of the ultrawideband channel and the low dynamic range available to ultrawideband receiver. We propose an alternative means of range estimation combining the statistics of frequency selective fading and the path-loss and we show that this algorithm provides significantly more accurate estimation.","PeriodicalId":260071,"journal":{"name":"2012 IEEE International Conference on Ultra-Wideband","volume":"83 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117102290","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 Compact CPW fed ultra-wideband antenna with a band-notch characteristic 一种具有带陷波特性的紧凑CPW馈电超宽带天线
2012 IEEE International Conference on Ultra-Wideband Pub Date : 2012-11-12 DOI: 10.1109/ICUWB.2012.6340416
O. Haraz, A. Sebak, K. Jamil
{"title":"A Compact CPW fed ultra-wideband antenna with a band-notch characteristic","authors":"O. Haraz, A. Sebak, K. Jamil","doi":"10.1109/ICUWB.2012.6340416","DOIUrl":"https://doi.org/10.1109/ICUWB.2012.6340416","url":null,"abstract":"A Compact coplanar waveguide (CPW) fed ultrawideband (UWB) antenna is presented. The antenna consists of a corrugated half circular disc radiator and a notched CPW ground plane which are used to improve the impedance bandwidth and also to reduce the overall size to only 0.22 × 0.22 λ2 at 3GHz. The calculated impedance bandwidth of the proposed antenna ranges from 3.5GHz to 11GHz for a reflection coefficient (S11) less than -10dB. The proposed antenna has a relatively stable radiation patterns over its whole frequency band of interest. A U-shaped slot is embedded to obtain the band-notched characteristic in the 5.0-6.0 GHz wireless local area network (WLAN) band.","PeriodicalId":260071,"journal":{"name":"2012 IEEE International Conference on Ultra-Wideband","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121111257","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
Design and performance of a digital polar transmitter system for multiband-OFDM Ultra-WideBand 一种多波段ofdm超宽带数字极极发射机系统的设计与性能
2012 IEEE International Conference on Ultra-Wideband Pub Date : 2012-11-12 DOI: 10.1109/ICUWB.2012.6340504
K. Seah, M. Chia
{"title":"Design and performance of a digital polar transmitter system for multiband-OFDM Ultra-WideBand","authors":"K. Seah, M. Chia","doi":"10.1109/ICUWB.2012.6340504","DOIUrl":"https://doi.org/10.1109/ICUWB.2012.6340504","url":null,"abstract":"A low-voltage 3-bit Digital Polar Amplifier for MB-OFDM UWB is proposed, which comprises 7 parallel RF amplifiers driven by a constant RF phase-modulated signal and 7 cascode transistors (connected in series) digitally controlled by a 3-bit digitized amplitude signal to reconstruct the UWB signal at the output. Our DPA was able to achieve an EVM of -22 dB and drain efficiency of 21.0% while delivering 5.5 dBm of output power and consuming 17 mW of power using IBM 130-nm CMOS technology.","PeriodicalId":260071,"journal":{"name":"2012 IEEE International Conference on Ultra-Wideband","volume":"120 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127428189","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
Synthesis of pulsed frequency modulated ultra wideband radar signals based on stepped phase shifting 基于阶跃移相的脉冲调频超宽带雷达信号合成
2012 IEEE International Conference on Ultra-Wideband Pub Date : 2012-11-12 DOI: 10.1109/ICUWB.2012.6340471
C. Carlowitz, M. Vossiek, A. Esswein, R. Weigel
{"title":"Synthesis of pulsed frequency modulated ultra wideband radar signals based on stepped phase shifting","authors":"C. Carlowitz, M. Vossiek, A. Esswein, R. Weigel","doi":"10.1109/ICUWB.2012.6340471","DOIUrl":"https://doi.org/10.1109/ICUWB.2012.6340471","url":null,"abstract":"The current paper introduces a novel concept for low complexity and low power synthesis of pulsed frequency modulated ultra wideband (PFM UWB) signals. Instead of using a VCO-based synthesizer, we employ a simple digitally tuned phase modulator that varies the phase of a high order harmonic of a fixed frequency LO signal. The phase modulated harmonic is then injected into a switched injection locked pulse oscillator. Based on this concept, an arbitrary sequence of phase samples - i.e. UWB pulses where each pulse has a predefined carrier phase - can be generated. This sampled pulse sequence can be used for the generation of angle modulation schemes for communication signals and also for the generation of pulsed linear frequency modulated radar signals. The capability of the proposed concept is experimentally demonstrated for the synthesis of 6 to 8 GHz UWB pulsed frequency sweeps. Measurement results verify that this novel approach delivers a performance comparable to much more complex pulsed frequency modulation implementations.","PeriodicalId":260071,"journal":{"name":"2012 IEEE International Conference on Ultra-Wideband","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127189233","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: 1
Conformal microwave tomography using a broadband non-contacting monopole antenna array 使用宽带非接触单极天线阵列的共形微波层析成像
2012 IEEE International Conference on Ultra-Wideband Pub Date : 2012-11-12 DOI: 10.1109/ICUWB.2012.6340462
N. Epstein, Amir H. Golnabi, P. Meaney, K. Paulsen
{"title":"Conformal microwave tomography using a broadband non-contacting monopole antenna array","authors":"N. Epstein, Amir H. Golnabi, P. Meaney, K. Paulsen","doi":"10.1109/ICUWB.2012.6340462","DOIUrl":"https://doi.org/10.1109/ICUWB.2012.6340462","url":null,"abstract":"Microwave imaging has shown clinical value based on its ability to detect a wide range of dielectric properties. Tomographic microwave images are traditionally reconstructed using a uniform mesh. Dartmouth College's microwave tomographic imaging system requires that imaged volumes be submerged in the system's coupling medium. Due to the fact that the electrical properties of the coupling medium are known, we have investigated a conformal imaging technique that deploys the reconstruction mesh directly to the imaged zone, such that all reconstruction nodes lie on or within the volume of interest. The broadband nature of the system [.5-3 GHz] allows the use of a frequency-hopping, phase-unwrapping technique, where low frequency phase information is used to guide the phase unwrapping at higher frequencies. In this paper we present the results from a simulation and phantom experiment to verify the use of conformal microwave imaging with our current imaging system.","PeriodicalId":260071,"journal":{"name":"2012 IEEE International Conference on Ultra-Wideband","volume":"292 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132196078","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
Ultrawideband double-sided printed dipole arrays 超宽带双面印刷偶极子阵列
2012 IEEE International Conference on Ultra-Wideband Pub Date : 2012-11-12 DOI: 10.1109/ICUWB.2012.6340415
S. Barrette, S. Podilchak, Y. Antar
{"title":"Ultrawideband double-sided printed dipole arrays","authors":"S. Barrette, S. Podilchak, Y. Antar","doi":"10.1109/ICUWB.2012.6340415","DOIUrl":"https://doi.org/10.1109/ICUWB.2012.6340415","url":null,"abstract":"This paper introduces two ultrawideband (UWB) antennas that use a printed array of 16 antipodal elements which are defined by full- and partial-ellipses. Measured gain values are greater than 10 dB from 3.1 to 11 GHz for both designs. The proposed UWB arrays use balanced, double-sided stripline corporate feed networks with the antipodal elements mounted above a reflecting ground plane to increase gain in the forward direction. The antennas are compact (140 mm × 133 mm × 16.6 mm) with a 50-Ω feed line and offer a very simple geometry suitable for low cost fabrication and straightforward printed circuit board integration. Measured and simulated return loss values are in agreement along with the beam patterns and antenna gain as a function of frequency. The time domain behavior of the studied antennas is also examined.","PeriodicalId":260071,"journal":{"name":"2012 IEEE International Conference on Ultra-Wideband","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133772504","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
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