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2005 IEEE International Conference on Ultra-Wideband最新文献

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Family of time-hopping sequences with no-hit and few-hit zone for quasi-synchronous THSS-UWB systems 准同步THSS-UWB系统的无命中区和少命中区跳时序列族
2005 IEEE International Conference on Ultra-Wideband Pub Date : 2005-09-05 DOI: 10.1109/ICU.2005.1569954
Zhenyu Zhang, F. Zeng, L. Ge
{"title":"Family of time-hopping sequences with no-hit and few-hit zone for quasi-synchronous THSS-UWB systems","authors":"Zhenyu Zhang, F. Zeng, L. Ge","doi":"10.1109/ICU.2005.1569954","DOIUrl":"https://doi.org/10.1109/ICU.2005.1569954","url":null,"abstract":"In this paper, based on the known frequency-hopping (FH) sequences and conventional time-hopping (TH) sequences, three sets of TH sequences with no-hit zone (NHZ) or few-hit zone (FHZ) are proposed. Different from conventional TH sequences design, the presented NHZ and FHZ TH sequences suitable for quasi-synchronous time-hopping spread spectrum ultra wideband (QS THSS-UWB) systems can be mutually orthogonal (or almost orthogonal) within NHZ (or FHZ). The QS THSS-UWB systems employing the proposed NHZ or FHZ TH sequences can eliminate or reduce multiple-access interference (MAI) and multipath interference when the shifts between sequences are in the range of NHZ (or FHZ).","PeriodicalId":105819,"journal":{"name":"2005 IEEE International Conference on Ultra-Wideband","volume":"60 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":"129916575","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
Inter-symbol/inter-frame interference in time-hopping ultra wideband impulse radio system 跳时超宽带脉冲无线电系统中的码间/帧间干扰
2005 IEEE International Conference on Ultra-Wideband Pub Date : 2005-09-05 DOI: 10.1109/ICU.2005.1570020
A.-L. Deleuze, P. Ciblat, C. L. Le Martret
{"title":"Inter-symbol/inter-frame interference in time-hopping ultra wideband impulse radio system","authors":"A.-L. Deleuze, P. Ciblat, C. L. Le Martret","doi":"10.1109/ICU.2005.1570020","DOIUrl":"https://doi.org/10.1109/ICU.2005.1570020","url":null,"abstract":"A closed-form expression for the intersymbol/inter-frame interference variance is derived in the context of a time-hopping ultra wideband impulse radio based system. This enables us to theoretically analyze on the performance the influence of the time-hopping codes, of the rake receiver number of fingers, and of the guard-time size. Simulations sustain our claims.","PeriodicalId":105819,"journal":{"name":"2005 IEEE International Conference on Ultra-Wideband","volume":"24 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":"130848237","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
A UWB-based virtual MIMO communication architecture for beyond 3G cellular networks 一种基于uwb的虚拟MIMO通信架构，适用于超3G蜂窝网络
2005 IEEE International Conference on Ultra-Wideband Pub Date : 2005-09-05 DOI: 10.1109/ICU.2005.1570081
Qimei Cui, Xiaofeng Tao, Wen Yu, Ping Zhang
{"title":"A UWB-based virtual MIMO communication architecture for beyond 3G cellular networks","authors":"Qimei Cui, Xiaofeng Tao, Wen Yu, Ping Zhang","doi":"10.1109/ICU.2005.1570081","DOIUrl":"https://doi.org/10.1109/ICU.2005.1570081","url":null,"abstract":"This paper proposes a novel network architecture for beyond 3G (B3G) cellular networks, called UWB-based generalized virtual multiple-input multiple-output (G-VMIMO) architecture. The inherent characteristics of UWB technology bring some specifically suitable advantages to design an ad hoc network. The integration of B3G cellular networks and UWB-based wireless personal area network (WPAN) produces the virtual MIMO system. In this paper, we briefly introduce UWB-based wireless personal area network, and then describe the principle and the unique features of G-VMIMO architecture in detail. The feasibility and applicability of G-VMIMO system are validated by computer simulation. Simulation results indicate that the G-VMIMO system achieves good capacity gain. Finally, the challenges caused by the practical application of G-VMIMO system to cellular networks and wireless personal area network is analyzed.","PeriodicalId":105819,"journal":{"name":"2005 IEEE International Conference on Ultra-Wideband","volume":"2 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":"125616834","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
Multiuser interference during synchronization phase in UWB impulse radio
2005 IEEE International Conference on Ultra-Wideband Pub Date : 2005-09-05 DOI: 10.1109/ICU.2005.1570067
R. Merz, C. Botteron, P. Farine
{"title":"Multiuser interference during synchronization phase in UWB impulse radio","authors":"R. Merz, C. Botteron, P. Farine","doi":"10.1109/ICU.2005.1570067","DOIUrl":"https://doi.org/10.1109/ICU.2005.1570067","url":null,"abstract":"This paper analyzes the receiver's ability to differentiate between multiple users in ultra-wideband (UWB) impulse radio (IR) during the initial synchronization phase after a cold start, i.e., when the receiver is not yet synchronized with the user of interest. Because of multiple access interference (MAI), the receiver may combine the pulses of other users in a partially coherent way. In this case, the receiver should be able to reject all the interfering users in order to synchronize with the user of interest. For pseudo-random time-hopping (TH) spreading codes, the expected performance of the receiver to differentiate between the user of interest and the interfering users is analyzed and some relations with the code properties are shown. Numerical results for a multipath propagation channel and MAI are provided.","PeriodicalId":105819,"journal":{"name":"2005 IEEE International Conference on Ultra-Wideband","volume":"21 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":"124266984","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
Wide band pulse matched LNA for low power architecture 用于低功耗结构的宽带脉冲匹配LNA
2005 IEEE International Conference on Ultra-Wideband Pub Date : 2005-09-05 DOI: 10.1109/ICU.2005.1570042
M. Pelissier, F. Hameau, D. Morche, J. Fournier
{"title":"Wide band pulse matched LNA for low power architecture","authors":"M. Pelissier, F. Hameau, D. Morche, J. Fournier","doi":"10.1109/ICU.2005.1570042","DOIUrl":"https://doi.org/10.1109/ICU.2005.1570042","url":null,"abstract":"New architectures, dedicated to UWB low data rate systems, such as for instance, peak detection or energy detection focus on power saving. In this context, a LNA with ideal flat gain response over the whole bandwidth [3 GHz-5 GHz] is no more mandatory. This paper proposes a new approach, which relies on a matched amplification to the input pulse. This technique enables to increase gain up to 7.7 dB for a given consumption. A simulated CMOS design based on common source amplifier with inductive degeneration is presented for illustration. Energetic gain is close to 15 dB with a minimum noise figure of 2.3 dB and an input IP1 of 11.4 dBm. Core of the LNA dissipates less than 2.6 mW.","PeriodicalId":105819,"journal":{"name":"2005 IEEE International Conference on Ultra-Wideband","volume":"6 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":"121594017","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
An internally coded partial-band DS-CDMA system and its performance analysis 一种内编码部分频带DS-CDMA系统及其性能分析
2005 IEEE International Conference on Ultra-Wideband Pub Date : 2005-09-05 DOI: 10.1109/ICU.2005.1569953
M. Mirmohseni, M. Nasiri-Kenari, M. Shayesteh
{"title":"An internally coded partial-band DS-CDMA system and its performance analysis","authors":"M. Mirmohseni, M. Nasiri-Kenari, M. Shayesteh","doi":"10.1109/ICU.2005.1569953","DOIUrl":"https://doi.org/10.1109/ICU.2005.1569953","url":null,"abstract":"We propose a new partial-band DS-CDMA scheme for UWB communication systems, which is based on frequency-hopping (FH) and direct-sequence (DS) spread spectrum techniques. The total bandwidth is divided into N/sub s/ subbands. The output of a super-orthogonal encoder and a pseudorandom (PN) sequence select one subband, in which the user's data is sent in the form of DS-CDMA signal using the second PN sequence. We consider soft detection at the receiver front end. We obtain the upper and lower bounds on the bit error rate for the proposed method. For comparison, we also consider the conventional DS-CDMA system. It is shown that the proposed multiple access method outperforms the conventional DS-CDMA system significantly without requiring any extra bandwidth.","PeriodicalId":105819,"journal":{"name":"2005 IEEE International Conference on Ultra-Wideband","volume":"39 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":"121859676","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
Pulsed multicarrier time division multiplexing structure for high data-rate ultra-wideband wireless communications 用于高数据速率超宽带无线通信的脉冲多载波时分复用结构
2005 IEEE International Conference on Ultra-Wideband Pub Date : 2005-09-05 DOI: 10.1109/ICU.2005.1570047
Bin Xu, G. Bi
{"title":"Pulsed multicarrier time division multiplexing structure for high data-rate ultra-wideband wireless communications","authors":"Bin Xu, G. Bi","doi":"10.1109/ICU.2005.1570047","DOIUrl":"https://doi.org/10.1109/ICU.2005.1570047","url":null,"abstract":"When the ratio of bandwidth to data-rate is large, the pulsed orthogonal frequency division multiplexing (pulsed-OFDM) modulation can efficiently suppress fading by exploiting multipath diversity and thus achieve a good performance for ultra-wideband (UWB) communications. In order to obtain higher data-rate with limited bandwidth, a pulsed multicarrier time division multiplexing (pulsed-MCTDM) structure, a combination of TDM schemes and pulsed-OFDM modulations, is proposed in this paper. It boosts the data-rate by transmitting multiple pulsed-OFDM streams in parallel and distinguishes different streams by chip-level time slots. By multi-stream transmission, multi-branch receiving and parallel processing, it is able to provide higher scalability in data-rate and more flexibility in system design and reconfiguration than the original pulsed-OFDM system. The theoretical analysis demonstrates that the new structure does not decrease the available multipath diversity order while scaling the data-rate.","PeriodicalId":105819,"journal":{"name":"2005 IEEE International Conference on Ultra-Wideband","volume":"88 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":"115417073","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
Characterization of the UWB channel based on random partially known frequency responses 基于随机部分已知频率响应的UWB信道特性
2005 IEEE International Conference on Ultra-Wideband Pub Date : 2005-09-05 DOI: 10.1109/ICU.2005.1569966
Z. Irahhauten, G. Janssen, H. Nikookar
{"title":"Characterization of the UWB channel based on random partially known frequency responses","authors":"Z. Irahhauten, G. Janssen, H. Nikookar","doi":"10.1109/ICU.2005.1569966","DOIUrl":"https://doi.org/10.1109/ICU.2005.1569966","url":null,"abstract":"In this paper, a new method for UWB channel characterization is introduced. This method is based on the knowledge of the frequency response of several (but not all) randomly selected portions (chunks) of the UWB band. Employing this method, estimation of the root mean square (rms) delay spread (RDS) is investigated. The results for different scenarios are compared to the case when the complete UWB channel is known. Wideband indoor channel measurement data at 2.4, 4.75 and 11.5 GHz of G. Janssen et al. (1996), which fulfils the UWB criteria, is evaluated using the introduced method. The results show that the RDS of the UWB channel can be estimated when the frequency response of the UWB channel is only partially known.","PeriodicalId":105819,"journal":{"name":"2005 IEEE International Conference on Ultra-Wideband","volume":"7 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":"122705044","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 narrowband interference in transmitted reference UWB receivers 发射参考超宽带接收机窄带干扰研究
2005 IEEE International Conference on Ultra-Wideband Pub Date : 2005-09-05 DOI: 10.1109/ICU.2005.1570051
M. Pausini, G. Janssen
{"title":"On the narrowband interference in transmitted reference UWB receivers","authors":"M. Pausini, G. Janssen","doi":"10.1109/ICU.2005.1570051","DOIUrl":"https://doi.org/10.1109/ICU.2005.1570051","url":null,"abstract":"In this paper, we study the performance of a transmitted reference (TR) system corrupted by a single tone interferer in a multipath noise-free channel. It is shown that the auto-correlation of the narrowband interferer, arising from the dirty template adopted in the signal demodulation, can be modelled as a bias term. The magnitude of this term depends on the frequency of the tone interferer, and it can enormously affect the receiver performance. However this kind of interference can be completely suppressed by designing a simple delay and chip code, without requiring any information on the frequency of the interferer. The cross-correlation between the UWB and the narrowband signals can be modelled as a random variable, for which we derive the analytical probability density function. The statistic of this term also depends on the carrier frequency of the tone interferer, and a method is proposed to mitigate its effects.","PeriodicalId":105819,"journal":{"name":"2005 IEEE International Conference on Ultra-Wideband","volume":"113 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":"124740429","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: 27
Link performance evaluation of a TH-PPM UWB system in the presence of multi-user interference 多用户干扰下TH-PPM超宽带系统的链路性能评估
2005 IEEE International Conference on Ultra-Wideband Pub Date : 2005-09-05 DOI: 10.1109/ICU.2005.1570069
Min Jeong Kim, J. Chung, C. Y. Jung, J. Chong, D. Sung
{"title":"Link performance evaluation of a TH-PPM UWB system in the presence of multi-user interference","authors":"Min Jeong Kim, J. Chung, C. Y. Jung, J. Chong, D. Sung","doi":"10.1109/ICU.2005.1570069","DOIUrl":"https://doi.org/10.1109/ICU.2005.1570069","url":null,"abstract":"The link performance of a TH-PPM UWB system is evaluated through a more realistic multi-user interference (MUI) model. Instead of unrealistic assumptions such as perfect interference power control and Gaussian MUI distribution, the received power and the propagation delay of each interference signal at a receiver are obtained from the distance between the receiver and an interfering user. Based on the proposed MUI model, a semi-analytical approach of the receiver link performance is also introduced. The estimated E/sub b//(I/sub o/ + N/sub o/) and the bit error probability for a given number of interfering users are numerically obtained by the proposed semi-analytical approach and the results are compared with the simulation results.","PeriodicalId":105819,"journal":{"name":"2005 IEEE International Conference on Ultra-Wideband","volume":"58 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":"123616445","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
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