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2002 IEEE Conference on Ultra Wideband Systems and Technologies (IEEE Cat. No.02EX580)最新文献

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A deterministic ultra wideband channel modeling 一种确定性超宽带信道建模方法
2002 IEEE Conference on Ultra Wideband Systems and Technologies (IEEE Cat. No.02EX580) Pub Date : 2002-05-21 DOI: 10.1109/UWBST.2002.1006307
B. Uguen, E. Plouhinec, Y. Lostanlen, Gerard Chassayl
{"title":"A deterministic ultra wideband channel modeling","authors":"B. Uguen, E. Plouhinec, Y. Lostanlen, Gerard Chassayl","doi":"10.1109/UWBST.2002.1006307","DOIUrl":"https://doi.org/10.1109/UWBST.2002.1006307","url":null,"abstract":"We study the realisation of a deterministic channel modeling which allows the construction of a realistic received waveform from a wireless spread spectrum multiple-access (SSMA) using time hopping (TH) modulation. The goal is to reach the symbol decision from a simulated waveform. This paper explains how to use the uniform theory of diffraction (UTD) method combined with a ray tracing to obtain the received TH modulation waveform in indoor or outdoor environment.","PeriodicalId":272053,"journal":{"name":"2002 IEEE Conference on Ultra Wideband Systems and Technologies (IEEE Cat. No.02EX580)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124855649","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: 73
The effects of timing jitter on the performance of impulse radio 定时抖动对脉冲无线电性能的影响
2002 IEEE Conference on Ultra Wideband Systems and Technologies (IEEE Cat. No.02EX580) Pub Date : 2002-05-21 DOI: 10.1109/UWBST.2002.1006364
W. M. Lovelace, J. Townsend
{"title":"The effects of timing jitter on the performance of impulse radio","authors":"W. M. Lovelace, J. Townsend","doi":"10.1109/UWBST.2002.1006364","DOIUrl":"https://doi.org/10.1109/UWBST.2002.1006364","url":null,"abstract":"Impulse radio is a promising ultra-wideband technique for tactical military communications. Key features of time-hopping impulse radio are the very narrow pulses used to convey information. Analysis of such time-hopping schemes under a variety of assumptions have been reported in the literature. However, none of these studies to date consider the effects of timing jitter on time-hopping in a UWB setting. In this paper we consider the effects of timing jitter on the performance of binary and 4-ary UWB communications. We find that the performance of impulse radio is very sensitive to timing jitter, at least in part due to the very narrow pulses. We also find that for our detection performance criteria, the 4-ary PPM system outperforms binary offset PPM at all jitter levels in thermal and pulse noise. However, the benefit of 4-ary PPM relative to the offset binary case is diminished with increased timing jitter at these same levels.","PeriodicalId":272053,"journal":{"name":"2002 IEEE Conference on Ultra Wideband Systems and Technologies (IEEE Cat. No.02EX580)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131187928","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: 45
Ultra-wideband precision asset location system 超宽带精确资产定位系统
2002 IEEE Conference on Ultra Wideband Systems and Technologies (IEEE Cat. No.02EX580) Pub Date : 2002-05-21 DOI: 10.1109/UWBST.2002.1006336
Robert J. Foiztnm, J.
{"title":"Ultra-wideband precision asset location system","authors":"Robert J. Foiztnm, J.","doi":"10.1109/UWBST.2002.1006336","DOIUrl":"https://doi.org/10.1109/UWBST.2002.1006336","url":null,"abstract":"A prototype ultra-wideband (UWB) precision asset location (PAL) system was developed and tested aboard the SS Curtiss in Port Hueneme, California. The PAL system was developed to assess the capability of UWB geolocation to operate in severe multipath shipboard environments. The PAL system was based on an earlier UWB relative-time-of-arrival (RTOA) transceiver location system and was extended to a differential-time-of-arrival (DTOA) beacon architecture required for longer tag battery life. Testing was performed in open cargo spaces (worst-case multipath) and partially loaded cargo spaces (blockage). A reference laser surveying system was installed for comparison and accuracy tests were conducted over a cargo space. The PAL system performed to the estimated accuracy of a few feet in open cargo holds. UWB appeared to penetrate large cracks between containers, maintaining localization capability during blockage tests. This paper describes the UWB PAL system and the shipboard testing.","PeriodicalId":272053,"journal":{"name":"2002 IEEE Conference on Ultra Wideband Systems and Technologies (IEEE Cat. No.02EX580)","volume":"98 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134391445","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: 282
Ultra wideband radar systems: advantages and disadvantages 超宽带雷达系统:优点和缺点
2002 IEEE Conference on Ultra Wideband Systems and Technologies (IEEE Cat. No.02EX580) Pub Date : 2002-05-21 DOI: 10.1109/UWBST.2002.1006348
I. Immoreev, Pgs Dmih, Fedotov
{"title":"Ultra wideband radar systems: advantages and disadvantages","authors":"I. Immoreev, Pgs Dmih, Fedotov","doi":"10.1109/UWBST.2002.1006348","DOIUrl":"https://doi.org/10.1109/UWBST.2002.1006348","url":null,"abstract":"This review paper discusses the differences of ultra wideband (UWB) radars from conventional narrowband radars. The features are shown of generation, radiation and processing of UWB radar signals evoked by change of signal waveform in the process of location, by appearance of the mutual dependence between signal waveform and antenna directivity and others. The opportunity of reception of the target radioimage is shown.","PeriodicalId":272053,"journal":{"name":"2002 IEEE Conference on Ultra Wideband Systems and Technologies (IEEE Cat. No.02EX580)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116132443","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: 110
Multi-user capacity of M-ary PPM ultra-wideband communications 百万分之百万分之超宽带通信的多用户容量
2002 IEEE Conference on Ultra Wideband Systems and Technologies (IEEE Cat. No.02EX580) Pub Date : 2002-05-21 DOI: 10.1109/UWBST.2002.1006341
Li Zhao, A. Haimovich
{"title":"Multi-user capacity of M-ary PPM ultra-wideband communications","authors":"Li Zhao, A. Haimovich","doi":"10.1109/UWBST.2002.1006341","DOIUrl":"https://doi.org/10.1109/UWBST.2002.1006341","url":null,"abstract":"We study the information theoretic capacity of M-ary pulse position modulation (PPM) ultra-wideband (UWB) communications for the multi-user channels. Under certain assumptions, the multiple-access interference component at the receiver is modeled as Gaussian. An expression for the signal-to-noise ratio is developed for UWB utilizing rectangular pulses. The information theoretic capacity of the UWB system is studied as a function of number of users. A closed form expression and a lower bound are found for the case of binary PPM. An upper bound on the aggregate capacity is found for the case of large number of users.","PeriodicalId":272053,"journal":{"name":"2002 IEEE Conference on Ultra Wideband Systems and Technologies (IEEE Cat. No.02EX580)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125811069","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: 47
An ultra wideband radar for micro air vehicle applications 一种用于微型飞行器的超宽带雷达
2002 IEEE Conference on Ultra Wideband Systems and Technologies (IEEE Cat. No.02EX580) Pub Date : 2002-05-21 DOI: 10.1109/UWBST.2002.1006344
Robert J. Foiitanu, Edward A. Richley, Anthoriy J. Marzdlo, Lance C. Beard, Robert, T. MuIIoy, E. J. Knight
{"title":"An ultra wideband radar for micro air vehicle applications","authors":"Robert J. Foiitanu, Edward A. Richley, Anthoriy J. Marzdlo, Lance C. Beard, Robert, T. MuIIoy, E. J. Knight","doi":"10.1109/UWBST.2002.1006344","DOIUrl":"https://doi.org/10.1109/UWBST.2002.1006344","url":null,"abstract":"The development and widespread use of micro air vehicles (MAVs) in the battlefield environment has been effectively constrained by the limitations in the MAV sensor suite. Furthermore, the extreme size, weight and power constraints imposed on the on-board electronics for such platforms have made it very difficult to utilize more conventional and commercially available technologies for this application. This paper discusses the development of an extremely small, micro-power, radar system utilizing ultra wideband (UWB) technology which addresses MAV mission requirements for collision avoidance and precision altimetry in support of autonomous vehicle operation.","PeriodicalId":272053,"journal":{"name":"2002 IEEE Conference on Ultra Wideband Systems and Technologies (IEEE Cat. No.02EX580)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124825468","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: 54
Recent progress in impulse radiating antennas 脉冲辐射天线的最新进展
2002 IEEE Conference on Ultra Wideband Systems and Technologies (IEEE Cat. No.02EX580) Pub Date : 2002-05-21 DOI: 10.1109/UWBST.2002.1006388
E. Farr, L. Bowen
{"title":"Recent progress in impulse radiating antennas","authors":"E. Farr, L. Bowen","doi":"10.1109/UWBST.2002.1006388","DOIUrl":"https://doi.org/10.1109/UWBST.2002.1006388","url":null,"abstract":"We summarize here a number of advances in impulse radiating antennas. These devices are composed of a reflector and a broadband feed. We have demonstrated improved gain and reduced crosspolarisation by using feed arms located at /spl plusmn/30/spl deg/ to the vertical, as opposed to the original design that placed the arms at /spl plusmn/45/spl deg/. We have reduced the return loss (flattened the TDR) at the splitter, at the feed point (focus), and at the resistors in the feed arms. We have added a ground plane that enhances mechanical stability and reduces crosspolarisation. We have also improved the mechanical stability of the feed point.","PeriodicalId":272053,"journal":{"name":"2002 IEEE Conference on Ultra Wideband Systems and Technologies (IEEE Cat. No.02EX580)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130136811","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
Delay-hopped transmitted-reference RF communications 延迟跳变发射参考射频通信
2002 IEEE Conference on Ultra Wideband Systems and Technologies (IEEE Cat. No.02EX580) Pub Date : 2002-05-21 DOI: 10.1109/UWBST.2002.1006368
R. Hoctor, H. Tomlinson
{"title":"Delay-hopped transmitted-reference RF communications","authors":"R. Hoctor, H. Tomlinson","doi":"10.1109/UWBST.2002.1006368","DOIUrl":"https://doi.org/10.1109/UWBST.2002.1006368","url":null,"abstract":"Previously, the authors have invented and experimented with a new radio communications scheme called delay-hopped transmitted-reference (DHTR) radio. This technique can function either as an impulse radio, or can employ a more traditional spread-spectrum carrier such as broadband noise. The DHTR method is well-suited to short-range transmissions in a high multipath environment, and, in contrast to time-modulated impulse radio, is easy to synchronize at the receiver. Finally, DHTR receivers and transmitters are not highly complex, and can be implemented in a cost-effective way.","PeriodicalId":272053,"journal":{"name":"2002 IEEE Conference on Ultra Wideband Systems and Technologies (IEEE Cat. No.02EX580)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130455200","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: 653
Assessment of stator winding insulation degradation in large generator by ultra-wideband PD detection 基于超宽带PD检测的大型发电机定子绕组绝缘退化评估
2002 IEEE Conference on Ultra Wideband Systems and Technologies (IEEE Cat. No.02EX580) Pub Date : 2002-05-21 DOI: 10.1109/UWBST.2002.1006334
Z. Jia, H. Xie
{"title":"Assessment of stator winding insulation degradation in large generator by ultra-wideband PD detection","authors":"Z. Jia, H. Xie","doi":"10.1109/UWBST.2002.1006334","DOIUrl":"https://doi.org/10.1109/UWBST.2002.1006334","url":null,"abstract":"Partial discharge (PD) can be used to study degradation processes of insulation by looking into the physics of the discharge process. This can be done by different means but a valuable technique, at least for the laboratory, is the use of ultra-wideband (UWB) PD detection systems. The UWB PD detection technique is introduced to measure the PD pulse wave of stator bar specimens during multi-stress aging tests. The data obtained are analyzed using joint time-frequency analysis (JTFA) methods, that is, short-time Fourier transform (STFT), discrete Wigner distribution (DWD) and discrete Gabor spectrogram (DGS), and finally Gabor spectrum is selected to analyze the characteristics of a single PD pulse wave. The results show that the UWB method can be used to measure a single PD pulse. The UWB PD pulse wave and its time-frequency spectrogram can indicate the degradation processes of the stator winding insulation in a large generator.","PeriodicalId":272053,"journal":{"name":"2002 IEEE Conference on Ultra Wideband Systems and Technologies (IEEE Cat. No.02EX580)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128991775","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
The low dispersion coaxial cavity as an ultra wideband antenna 低色散同轴腔作为超宽带天线
2002 IEEE Conference on Ultra Wideband Systems and Technologies (IEEE Cat. No.02EX580) Pub Date : 2002-05-21 DOI: 10.1109/UWBST.2002.1006386
T. Holzheimer
{"title":"The low dispersion coaxial cavity as an ultra wideband antenna","authors":"T. Holzheimer","doi":"10.1109/UWBST.2002.1006386","DOIUrl":"https://doi.org/10.1109/UWBST.2002.1006386","url":null,"abstract":"A coaxial cavity antenna, patent pending, has been developed by Raytheon. It exhibits low dispersion over a wide field-of-view (FOV) and multiple octaves or ultra wideband. This antenna has essentially a flat phase and amplitude response over a /spl plusmn/60 degree FOV. The design is scaleable over multiple frequency ranges and antennas have been built covering frequency ranges from 200 MHz to 44 GHz with bandwidths on the order of four and one-half octaves. The antenna is a four point feed design where the natural base polarizations are dual linear. Both senses of circular polarization can be obtained, and have been demonstrated with the addition of a hybrid. Designs have been built where any linear or circular polarization output can be switched. These antennas have been pulse tested with excellent results when compared to the input pulse for fidelity. Completed frequency measurements verify antenna performance two octaves out of band on the low side and almost one octave on the high side, for a total of four octaves of operation for a single cavity; that presents its application to ultra wideband collection. This antenna is used in interferometers and polarimeters. The flat phase and amplitude responses have proven this antenna to be an excellent choice for polarimetry. These elements are also being implemented in linear interferometers and collection systems. A typical field collection system is discussed as an application.","PeriodicalId":272053,"journal":{"name":"2002 IEEE Conference on Ultra Wideband Systems and Technologies (IEEE Cat. No.02EX580)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126856786","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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