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2005 IEEE International Conference on Ultra-Wideband最新文献

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Modified cross-correlation back projection for UWB imaging: numerical examples 超宽带成像的改进互相关反投影:数值例子
2005 IEEE International Conference on Ultra-Wideband Pub Date : 2005-09-05 DOI: 10.1109/ICU.2005.1570065
R. Zetik, J. Sachs, R. Thoma
{"title":"Modified cross-correlation back projection for UWB imaging: numerical examples","authors":"R. Zetik, J. Sachs, R. Thoma","doi":"10.1109/ICU.2005.1570065","DOIUrl":"https://doi.org/10.1109/ICU.2005.1570065","url":null,"abstract":"The article presents a modification of cross-correlated back projection algorithm for UWB imaging. The modified algorithm has improved performance in a sense of better quality of reconstructed 2D or 3D images of the propagation environment. The performance of the new imaging algorithm is demonstrated on numerical examples.","PeriodicalId":105819,"journal":{"name":"2005 IEEE International Conference on Ultra-Wideband","volume":"47 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":"125414463","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
Optimal search strategies for ultrawide bandwidth signal acquisition 超宽带信号采集的最优搜索策略
2005 IEEE International Conference on Ultra-Wideband Pub Date : 2005-09-05 DOI: 10.1109/ICU.2005.1570012
W. Suwansantisuk, M. Win
{"title":"Optimal search strategies for ultrawide bandwidth signal acquisition","authors":"W. Suwansantisuk, M. Win","doi":"10.1109/ICU.2005.1570012","DOIUrl":"https://doi.org/10.1109/ICU.2005.1570012","url":null,"abstract":"The important task of acquiring a spread-spectrum signal in a reasonable amount of time prior to commencing communication can be quite challenging for a receiver, especially when the transmission bandwidth is large. This paper investigates search techniques that minimize and maximize the mean acquisition time (MAT), a widely used performance measure of an acquisition receiver. We prove that a fixed-step serial search, a form of non-consecutive serial search, achieves a near-optimal MAT. In addition, we prove that the conventional serial search, in which consecutive cells are tested serially, results in the maximum MAT. Since these results are valid for any signal-to-noise ratio value, any fading distribution, and any detail of the detection layer, the paper provides search strategies that acquisition receivers should employ and search strategies that acquisition receivers should avoid.","PeriodicalId":105819,"journal":{"name":"2005 IEEE International Conference on Ultra-Wideband","volume":"235 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":"127940559","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: 14
Combined M-ary code shift/differential chaos keying for low-rate UWB communications 低速率超宽带通信的组合码移/差分混沌键控
2005 IEEE International Conference on Ultra-Wideband Pub Date : 2005-09-05 DOI: 10.1109/ICU.2005.1569952
S. Erkucuk, Dong In Kim
{"title":"Combined M-ary code shift/differential chaos keying for low-rate UWB communications","authors":"S. Erkucuk, Dong In Kim","doi":"10.1109/ICU.2005.1569952","DOIUrl":"https://doi.org/10.1109/ICU.2005.1569952","url":null,"abstract":"M-ary code shift keying (MCSK) is combined with differential chaos shift keying (DCSK) for low-rate UWB communications. The combined M-ary code shift (MCS)/DCSK shifts the reference-information signal pair to the location determined by (log/sub 2/ M)-bit data, hence transmitting a (1 + log/sub 2/ M)-bit symbol for the duration of one bit transmitted using DCSK, which in turn can be used to increase the silent periods within and between transmitted signal pairs. The resulting signaling format improves the bit error probability (BEP) performance of DCSK-based systems without altering the receiver structure or increasing the computational complexity, and provides longer silent periods to combat the worse effects of multipath (MP) fading. These results can be used to improve the ranging and location capability of DCSK-based low-rate ultra wideband (UWB) communication systems.","PeriodicalId":105819,"journal":{"name":"2005 IEEE International Conference on Ultra-Wideband","volume":"1 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":"130271949","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 low cost UWB printed dipole antenna with high performance 一种低成本高性能超宽带印刷偶极子天线
2005 IEEE International Conference on Ultra-Wideband Pub Date : 2005-09-05 DOI: 10.1109/ICU.2005.1569963
E. Guéguen, F. Thudor, P. Chambelin
{"title":"A low cost UWB printed dipole antenna with high performance","authors":"E. Guéguen, F. Thudor, P. Chambelin","doi":"10.1109/ICU.2005.1569963","DOIUrl":"https://doi.org/10.1109/ICU.2005.1569963","url":null,"abstract":"This paper introduces a new ultra-wideband (UWB) printed circular dipole antenna with a hidden feed line. The specific feeding removes any radiation pattern disturbance generally met with this kind of antenna when fed with a coaxial or a microstrip line. The dipole is smaller than a quarter-wavelength unlike more traditional dipole. For a low cost realization, the antenna has been implemented on a FR4 substrate. Measurements have been done and show good performance both in terms of matching and radiation pattern over a wide frequency bandwidth. The design and the measurements are presented hereafter.","PeriodicalId":105819,"journal":{"name":"2005 IEEE International Conference on Ultra-Wideband","volume":"146 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":"121196647","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: 38
UWB transmitted reference signaling schemes - part I: performance analysis 超宽带传输参考信令方案。第1部分:性能分析
2005 IEEE International Conference on Ultra-Wideband Pub Date : 2005-09-05 DOI: 10.1109/ICU.2005.1570054
Tony Q. S. Quek, M. Win, D. Dardari
{"title":"UWB transmitted reference signaling schemes - part I: performance analysis","authors":"Tony Q. S. Quek, M. Win, D. Dardari","doi":"10.1109/ICU.2005.1570054","DOIUrl":"https://doi.org/10.1109/ICU.2005.1570054","url":null,"abstract":"Transmitted-reference (TR) signaling, in conjunction with an autocorrelation receiver (AcR), offers a low-complexity alternative to Rake reception. Due to its simplicity, there is renewed interest in TR signaling for ultrawide bandwidth (UWB) systems. Different variations of TR signaling have been proposed and investigated, including differential TR (DTR) signaling and noise averaging at the AcR. This paper provides performance analysis of various TR schemes by developing an analytical framework based on the sampling expansion approach. Specifically, we derive uncoded bit error probability (BEP) of different TR signaling schemes such as DTR and noise averaging at the AcR for a broad class of fading channels.","PeriodicalId":105819,"journal":{"name":"2005 IEEE International Conference on Ultra-Wideband","volume":"1 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":"116276784","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: 22
Ultra wideband double-directional channel measurements in an office environment 办公室环境下的超宽带双向信道测量
2005 IEEE International Conference on Ultra-Wideband Pub Date : 2005-09-05 DOI: 10.1109/ICU.2005.1569947
Jun-Ichi Takada, F. Ohkubo, Katsuyuki Haneda, Takehiko Kobayashi
{"title":"Ultra wideband double-directional channel measurements in an office environment","authors":"Jun-Ichi Takada, F. Ohkubo, Katsuyuki Haneda, Takehiko Kobayashi","doi":"10.1109/ICU.2005.1569947","DOIUrl":"https://doi.org/10.1109/ICU.2005.1569947","url":null,"abstract":"The authors have studied the measured double directional channel properties based on the parametric model. The channel is modeled as the sum of the ray paths. Each of the paths is characterized by the direction of departure (DOD), the direction of arrival (DOA), and the delay time of arrival (DTOA). The complex amplitude of the path is modeled as a function of the frequency, and is represented by the values for subbands. These parameters are estimated by the SAGE-based algorithm. In this paper, the authors have investigated a furnished office environment. Dominant paths are particularly focused.","PeriodicalId":105819,"journal":{"name":"2005 IEEE International Conference on Ultra-Wideband","volume":"14 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":"126542836","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
Energy characteristics of UWB channel models applied to system design 超宽带信道模型的能量特性在系统设计中的应用
2005 IEEE International Conference on Ultra-Wideband Pub Date : 2005-09-05 DOI: 10.1109/ICU.2005.1569946
S. Dubouloz, M. Pelissier, B. Denis, M. Sambuq, L. Ouvry
{"title":"Energy characteristics of UWB channel models applied to system design","authors":"S. Dubouloz, M. Pelissier, B. Denis, M. Sambuq, L. Ouvry","doi":"10.1109/ICU.2005.1569946","DOIUrl":"https://doi.org/10.1109/ICU.2005.1569946","url":null,"abstract":"The propagation of ultra-wideband (UWB) signals is a critical issue, which strongly impacts and even jeopardizes system costs and applications. This paper proposes a complete overview of energy distribution in UWB IEEE channel models. At first, realistic large scale parameters, such as path loss or fading margin, are considered for an accurate link budget analysis. Then, the energy repartition in the channel is modeled so as to specify optimal integration windows and detection performances in non-coherent receiver architectures based on energy collection for both communication and ranging requirements. Moreover, the expected voltage at antenna is analyzed in order to define the receiver sensitivity as a function of range. At last, we focus on auto and cross correlation of channel impulse responses for the purpose of estimating the multi-user capability. For each of the investigated items, some illustrating samples are provided and major implications for real UWB systems are derived and discussed.","PeriodicalId":105819,"journal":{"name":"2005 IEEE International Conference on Ultra-Wideband","volume":"3 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":"126372526","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
Monte Carlo localization in dense multipath environments using UWB ranging 蒙特卡罗定位在密集的多路径环境中使用超宽带测距
2005 IEEE International Conference on Ultra-Wideband Pub Date : 2005-09-05 DOI: 10.1109/ICU.2005.1570005
D. Jourdan, J. Deyst, M. Win, N. Roy
{"title":"Monte Carlo localization in dense multipath environments using UWB ranging","authors":"D. Jourdan, J. Deyst, M. Win, N. Roy","doi":"10.1109/ICU.2005.1570005","DOIUrl":"https://doi.org/10.1109/ICU.2005.1570005","url":null,"abstract":"For most outdoor applications, systems such as GPS provide users with accurate position estimates. However, reliable range-based localization using radio signals in indoor or urban environments can be a problem due to multipath fading and line-of-sight (LOS) blockage. The measurement bias introduced by these delays causes significant localization error, even when using additional sensors such as an inertial measurement unit (IMU) to perform outlier rejection. We describe an algorithm for accurate indoor localization of a sensor in a network of known beacons. The sensor measures the range to the beacons using an Ultra-Wideband (UWB) signal and uses statistical inference to infer and correct for the bias due to LOS blockage in the range measurements. We show that a particle filter can be used to estimate the joint distribution over both pose and beacon biases. We use the particle filter estimation technique specifically to capture the non-linearity of transitions in the beacon bias as the sensor moves. Results using real-world and simulated data are presented.","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":"132353998","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: 122
Differential space-time ultra-wideband communications 差分时空超宽带通信
2005 IEEE International Conference on Ultra-Wideband Pub Date : 2005-09-05 DOI: 10.1109/ICU.2005.1569993
C. Abou-Rjeily, N. Daniele, J. Belfiore
{"title":"Differential space-time ultra-wideband communications","authors":"C. Abou-Rjeily, N. Daniele, J. Belfiore","doi":"10.1109/ICU.2005.1569993","DOIUrl":"https://doi.org/10.1109/ICU.2005.1569993","url":null,"abstract":"In this paper, we present two space-time schemes for exploiting diversity in multi-antenna impulse radio ultra wide-band (IR-UWB) systems when neither the transmitter nor the receiver has access to channel state information. The first scheme encodes the pulses of the same data symbol by a combination of differential phase shift keying and permutation codes and can be associated with any number of transmit and receive antennas. The second scheme encodes different symbols with two transmit antennas. These schemes are associated with Rake receivers and achieve full spatial and multi-path diversity with no data rate loss for constant-modulus multi-dimensional constellations. Adaptive versions of these schemes are also presented and shown to approach the performance of coherent receivers in stationary indoor channels.","PeriodicalId":105819,"journal":{"name":"2005 IEEE International Conference on Ultra-Wideband","volume":"3 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":"115382171","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
Design of a 6-bit 5.4-Gsamples/s CMOS D/A converter for DS-CDMA UWB transceivers 用于DS-CDMA超宽带收发器的6位5.4 gsamples /s CMOS D/ a转换器设计
2005 IEEE International Conference on Ultra-Wideband Pub Date : 2005-09-05 DOI: 10.1109/ICU.2005.1570009
Shen Wang, D. Ha, S. S. Choi
{"title":"Design of a 6-bit 5.4-Gsamples/s CMOS D/A converter for DS-CDMA UWB transceivers","authors":"Shen Wang, D. Ha, S. S. Choi","doi":"10.1109/ICU.2005.1570009","DOIUrl":"https://doi.org/10.1109/ICU.2005.1570009","url":null,"abstract":"This paper presents a design of a 6-bit 5.4-Gsamples/s D/A converter in IBM 0.13 /spl mu/m CMOS technology for DS-CDMA UWB transceivers. The high conversion rate and low supply voltage of 1.5 V make the design a challenge. To reduce the time constant of the circuit, we propose a two-stage current-steering topology, in which the distribution of the resistive and capacitive loads is balanced at the two stages. We also propose a folded-cascode current source cell that eliminates the need to control the crossing-points of the switch signals and minimizes the digital feedthrough. The current source cell does this without sacrificing headroom, so the circuit is suitable for a low supply voltage. Post-layout simulation has been performed to estimate performance. At the conversion rate of 5.4 Gsamples/s, the spurious free dynamic range (SFDR) is greater than 38 dB for three different signal frequencies. Both the integral nonlinearity (INL) and differential nonlinearity (DNL) stay within 0.3 LSB. The layout occupies a small active area of 110 /spl mu/m /spl times/ 90 /spl mu/m, and the D/A converter consumes only 20 mW of power.","PeriodicalId":105819,"journal":{"name":"2005 IEEE International Conference on Ultra-Wideband","volume":"320 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":"122437165","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: 12
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