Pub Date : 2011-10-24DOI: 10.1109/ICUWB.2011.6058846
L. Goratti, A. Rabbachin, S. Savazzi, M. Latva-aho
In the past ten years, ultra wideband (UWB) technology has attracted great attention from academia and industry to enable a large number of applications. Typically, UWB was candidate to deliver home connectivity, sensor networks and body area networks. As UWB enabled devices operate in unlicensed mode, standardization efforts have been carried out in different parts of the globe to regulate their use in different contexts. ECMA-368 is an industry led standard for high data rate UWB communications. One of the key managing features of this standard is the so called distributed beaconing. In this paper, we analyze the distributed beaconing mechanism of ECMA-368. We focus on the transient phase in which newcomer devices attempt to join a network by accessing the standard defined beacon period. The joining procedure with which devices access the network is modeled by means of an embedded absorbing Markov chain. The relevant issue of modeling the miss-detection of beacon frames transmitted over fading channels is also assessed. Performance evaluation of distributed beaconing is given in terms of energy consumption. The required overhead for network setup is also analyzed.
{"title":"Analysis of multi-band UWB distributed beaconing over fading channels","authors":"L. Goratti, A. Rabbachin, S. Savazzi, M. Latva-aho","doi":"10.1109/ICUWB.2011.6058846","DOIUrl":"https://doi.org/10.1109/ICUWB.2011.6058846","url":null,"abstract":"In the past ten years, ultra wideband (UWB) technology has attracted great attention from academia and industry to enable a large number of applications. Typically, UWB was candidate to deliver home connectivity, sensor networks and body area networks. As UWB enabled devices operate in unlicensed mode, standardization efforts have been carried out in different parts of the globe to regulate their use in different contexts. ECMA-368 is an industry led standard for high data rate UWB communications. One of the key managing features of this standard is the so called distributed beaconing. In this paper, we analyze the distributed beaconing mechanism of ECMA-368. We focus on the transient phase in which newcomer devices attempt to join a network by accessing the standard defined beacon period. The joining procedure with which devices access the network is modeled by means of an embedded absorbing Markov chain. The relevant issue of modeling the miss-detection of beacon frames transmitted over fading channels is also assessed. Performance evaluation of distributed beaconing is given in terms of energy consumption. The required overhead for network setup is also analyzed.","PeriodicalId":143107,"journal":{"name":"2011 IEEE International Conference on Ultra-Wideband (ICUWB)","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127256521","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}
Pub Date : 2011-10-24DOI: 10.1109/ICUWB.2011.6058809
Zheng Li, G. Gielen
This paper presents a novel method for signal acquisition in UWB-based transmit-only wireless sensor networks where concurrent transmissions are unavoidable and power control is infeasible. In such a scenario, the conventional CDMA approach where different sensor nodes have different spreading codes, suffers from the near-far effect and difficulty in code assignment. The proposed single-code method employing the low-duty-cycle DS-UWB signal turns the near-far problem to a near-far advantage and greatly simplifies the system complexity. The performance and implementation cost of our proposal are compared with other approaches, such as the CDMA approach employing the low-duty-cycle DS-UWB signal, the single-code approach employing the high-duty-cycle DS-UWB signal, the TH-UWB signal and the TH/DS-UWB signal. The results show that the proposed method has better performance and simpler implementation in the transmit-only scenario.
{"title":"UWB signal acquisition in transmit-only networks","authors":"Zheng Li, G. Gielen","doi":"10.1109/ICUWB.2011.6058809","DOIUrl":"https://doi.org/10.1109/ICUWB.2011.6058809","url":null,"abstract":"This paper presents a novel method for signal acquisition in UWB-based transmit-only wireless sensor networks where concurrent transmissions are unavoidable and power control is infeasible. In such a scenario, the conventional CDMA approach where different sensor nodes have different spreading codes, suffers from the near-far effect and difficulty in code assignment. The proposed single-code method employing the low-duty-cycle DS-UWB signal turns the near-far problem to a near-far advantage and greatly simplifies the system complexity. The performance and implementation cost of our proposal are compared with other approaches, such as the CDMA approach employing the low-duty-cycle DS-UWB signal, the single-code approach employing the high-duty-cycle DS-UWB signal, the TH-UWB signal and the TH/DS-UWB signal. The results show that the proposed method has better performance and simpler implementation in the transmit-only scenario.","PeriodicalId":143107,"journal":{"name":"2011 IEEE International Conference on Ultra-Wideband (ICUWB)","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129916493","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}
Pub Date : 2011-10-24DOI: 10.1109/ICUWB.2011.6058829
L. Zwirello, C. Heine, Xuyang Li, T. Zwick
This contribution deals with the topic of Ultra-Wideband correlation receivers and methods for their synchronization. In the first part of the paper the generic UWB transmitter and self-synchronizing correlation receiver are proposed and the measurements of the single building blocks are discussed. Further advanced synchronization scheme, allowing more efficient data transmission is proposed and finally the RF front end of the UWB transceiver is verified by the measurement in the real channel.
{"title":"An UWB correlation receiver for performance assessment of synchronization algorithms","authors":"L. Zwirello, C. Heine, Xuyang Li, T. Zwick","doi":"10.1109/ICUWB.2011.6058829","DOIUrl":"https://doi.org/10.1109/ICUWB.2011.6058829","url":null,"abstract":"This contribution deals with the topic of Ultra-Wideband correlation receivers and methods for their synchronization. In the first part of the paper the generic UWB transmitter and self-synchronizing correlation receiver are proposed and the measurements of the single building blocks are discussed. Further advanced synchronization scheme, allowing more efficient data transmission is proposed and finally the RF front end of the UWB transceiver is verified by the measurement in the real channel.","PeriodicalId":143107,"journal":{"name":"2011 IEEE International Conference on Ultra-Wideband (ICUWB)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126464771","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}
Pub Date : 2011-10-24DOI: 10.1109/ICUWB.2011.6058896
Leila Bousbia, M. Mabrouk
In this paper, a miniature planar ultra-wideband (UWB) bandpass filter has been proposed and simulated by using loop resonators. The occupied size of the proposed filter is 123 mm2 The studied filter is not only compact but also delivers excellent scattering parameters with magnitude of insertion loss, S21 lower than 0.09dB and return loss found better than 20 dB. The bandpass filter has 3-dB fractional bandwidth of 65% of center frequency (5.46 GHz), in the range of 3.7 GHz to 7.22GHz. A new feature of the loop resonator filter is constructed by ring resonator and T-shaped stub loaded at the line center.
{"title":"A miniaturized UWB bandpass filter using open stub T- shaped line loaded resonators","authors":"Leila Bousbia, M. Mabrouk","doi":"10.1109/ICUWB.2011.6058896","DOIUrl":"https://doi.org/10.1109/ICUWB.2011.6058896","url":null,"abstract":"In this paper, a miniature planar ultra-wideband (UWB) bandpass filter has been proposed and simulated by using loop resonators. The occupied size of the proposed filter is 123 mm2 The studied filter is not only compact but also delivers excellent scattering parameters with magnitude of insertion loss, S21 lower than 0.09dB and return loss found better than 20 dB. The bandpass filter has 3-dB fractional bandwidth of 65% of center frequency (5.46 GHz), in the range of 3.7 GHz to 7.22GHz. A new feature of the loop resonator filter is constructed by ring resonator and T-shaped stub loaded at the line center.","PeriodicalId":143107,"journal":{"name":"2011 IEEE International Conference on Ultra-Wideband (ICUWB)","volume":"28 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120917135","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}
Pub Date : 2011-10-24DOI: 10.1109/ICUWB.2011.6058880
Rshdee Alhakim, K. Raoof, E. Simeu, Y. Serrestou
Timing acquisition represents a major challenge in carrying out highly efficient ultra-wideband (UWB) communications. The timing with dirty template (TDT) approach is a promising candidate, which is low-complexity high-performance timing acquisition. In this paper, we describe the dirty template (DT) technique, in order to develop and test timing algorithms in Data Aided (DA) mode. In addition, we derive the Cramer-Rao low bound, which is used as fundamental performance limit for any timing estimator. Next, the TDT acquisition estimator is achieved by using Maximum Likelihood (ML) concept. Simulation results confirm that the timing estimation performance is improved with either the signal-to-noise ratio (SNR) or the training sequence number increases.
{"title":"Data-aided timing estimation in UWB communication systems using dirty templates","authors":"Rshdee Alhakim, K. Raoof, E. Simeu, Y. Serrestou","doi":"10.1109/ICUWB.2011.6058880","DOIUrl":"https://doi.org/10.1109/ICUWB.2011.6058880","url":null,"abstract":"Timing acquisition represents a major challenge in carrying out highly efficient ultra-wideband (UWB) communications. The timing with dirty template (TDT) approach is a promising candidate, which is low-complexity high-performance timing acquisition. In this paper, we describe the dirty template (DT) technique, in order to develop and test timing algorithms in Data Aided (DA) mode. In addition, we derive the Cramer-Rao low bound, which is used as fundamental performance limit for any timing estimator. Next, the TDT acquisition estimator is achieved by using Maximum Likelihood (ML) concept. Simulation results confirm that the timing estimation performance is improved with either the signal-to-noise ratio (SNR) or the training sequence number increases.","PeriodicalId":143107,"journal":{"name":"2011 IEEE International Conference on Ultra-Wideband (ICUWB)","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116227634","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}
Pub Date : 2011-10-24DOI: 10.1109/ICUWB.2011.6058906
S. Hashemi
A novel super compact microwave ultra-wideband (UWB) bandpass passive filter (BPF) is proposed using S-shape broadside-coupled striplines. A theoretical model is presented to analyze the scattering and coupling mechanism of the suggested filter. To eliminate interference, a tunable integrated notched-band filter is also introduced using a new technique. A group delay of 0.08 ns within the passband is observed. Experiments carried out over the designed examples and the measurement and simulation results are compared. The physical volume of the filter is 1.5 mm × 1.8 mm × 1.5 mm.
提出了一种新型的超紧凑微波超宽带(UWB)带通无源滤波器(BPF)，该滤波器采用s型宽带耦合带状线。提出了一个理论模型来分析该滤波器的散射和耦合机理。为了消除干扰，采用一种新技术，引入了可调谐集成陷波带滤波器。在通带内观察到0.08 ns的群延迟。通过设计算例进行了实验，并对测量和仿真结果进行了比较。过滤器的物理体积为1.5 mm × 1.8 mm × 1.5 mm。
{"title":"Ultra small ultra-wideband bandpass filter using broadside coupled S-shape striplines with built-in tunable notched band","authors":"S. Hashemi","doi":"10.1109/ICUWB.2011.6058906","DOIUrl":"https://doi.org/10.1109/ICUWB.2011.6058906","url":null,"abstract":"A novel super compact microwave ultra-wideband (UWB) bandpass passive filter (BPF) is proposed using S-shape broadside-coupled striplines. A theoretical model is presented to analyze the scattering and coupling mechanism of the suggested filter. To eliminate interference, a tunable integrated notched-band filter is also introduced using a new technique. A group delay of 0.08 ns within the passband is observed. Experiments carried out over the designed examples and the measurement and simulation results are compared. The physical volume of the filter is 1.5 mm × 1.8 mm × 1.5 mm.","PeriodicalId":143107,"journal":{"name":"2011 IEEE International Conference on Ultra-Wideband (ICUWB)","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116558878","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}
Pub Date : 2011-10-24DOI: 10.1109/ICUWB.2011.6058821
S. Manohar, T. Srikanth, Viswanath Ganapathy
Ultra-wideband (UWB) transmissions have well-documented advantages for low-power, peer-to-peer, and multiple-access communications. In this paper, we present novel linear receiver algorithms for multiuser detection (MUD) based on minimum mean square error (MMSE) for diversity enhancing UWB multiuser communication systems. The algorithms exploit inherent multipath diversity and mitigate the effects of both inter symbol interference (ISI) and multiuser interference (MUI). Further more, the receiver algorithms also optimally exploit diversity. We also propose a coded transmission scheme for the MIMO-UWB system for exploiting transmit diversity. We provide performance evaluation of the detectors through detailed analysis and simulations for synchronous and asynchronous users. An analytical framework for obtaining closed form expression for the bit error rate (BER) of the above schemes is also discussed.
{"title":"Multiuser detection based receivers for diversity enhancing UWB systems","authors":"S. Manohar, T. Srikanth, Viswanath Ganapathy","doi":"10.1109/ICUWB.2011.6058821","DOIUrl":"https://doi.org/10.1109/ICUWB.2011.6058821","url":null,"abstract":"Ultra-wideband (UWB) transmissions have well-documented advantages for low-power, peer-to-peer, and multiple-access communications. In this paper, we present novel linear receiver algorithms for multiuser detection (MUD) based on minimum mean square error (MMSE) for diversity enhancing UWB multiuser communication systems. The algorithms exploit inherent multipath diversity and mitigate the effects of both inter symbol interference (ISI) and multiuser interference (MUI). Further more, the receiver algorithms also optimally exploit diversity. We also propose a coded transmission scheme for the MIMO-UWB system for exploiting transmit diversity. We provide performance evaluation of the detectors through detailed analysis and simulations for synchronous and asynchronous users. An analytical framework for obtaining closed form expression for the bit error rate (BER) of the above schemes is also discussed.","PeriodicalId":143107,"journal":{"name":"2011 IEEE International Conference on Ultra-Wideband (ICUWB)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131120622","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}
Pub Date : 2011-10-24DOI: 10.1109/ICUWB.2011.6058834
M. Hamalainen, V. Niemela, J. Iinatti, R. Kohno
This paper gives a performance overview of different types of ultra wideband (UWB) receivers that can be used in wireless body area network (WBAN) applications. The studied receivers are based on both coherent and non-coherent detections. The signal structure is following the IEEE 802.15.4a standard and the channel models used in the simulations are based on the experimental studies carried out at a real hospital environment. Two different links are used; on-body link and a link from body to external access point. Otherwise, the transceiver chain is kept the same all the time to distinguish the differences between studied cases, thus different channels.
{"title":"Performance comparison of the different IR-UWB receivers in wireless body area networks","authors":"M. Hamalainen, V. Niemela, J. Iinatti, R. Kohno","doi":"10.1109/ICUWB.2011.6058834","DOIUrl":"https://doi.org/10.1109/ICUWB.2011.6058834","url":null,"abstract":"This paper gives a performance overview of different types of ultra wideband (UWB) receivers that can be used in wireless body area network (WBAN) applications. The studied receivers are based on both coherent and non-coherent detections. The signal structure is following the IEEE 802.15.4a standard and the channel models used in the simulations are based on the experimental studies carried out at a real hospital environment. Two different links are used; on-body link and a link from body to external access point. Otherwise, the transceiver chain is kept the same all the time to distinguish the differences between studied cases, thus different channels.","PeriodicalId":143107,"journal":{"name":"2011 IEEE International Conference on Ultra-Wideband (ICUWB)","volume":"95 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114377215","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}
Pub Date : 2011-10-24DOI: 10.1109/ICUWB.2011.6058913
Huilin Xu, Wenshu Zhang, Liuqing Yang
Due to the huge bandwidth, ultra-wideband (UWB) signals can provide much higher localization and ranging accuracy in comparison to traditional narrowband signals. In order to exploit this capability, various UWB based localization and ranging techniques have been proposed and investigated in recent years. In this paper, these techniques are briefly introduced and compared to provide an overview of UWB based localization and ranging techniques.
{"title":"Wireless localization and ranging with ultra-wideband signals","authors":"Huilin Xu, Wenshu Zhang, Liuqing Yang","doi":"10.1109/ICUWB.2011.6058913","DOIUrl":"https://doi.org/10.1109/ICUWB.2011.6058913","url":null,"abstract":"Due to the huge bandwidth, ultra-wideband (UWB) signals can provide much higher localization and ranging accuracy in comparison to traditional narrowband signals. In order to exploit this capability, various UWB based localization and ranging techniques have been proposed and investigated in recent years. In this paper, these techniques are briefly introduced and compared to provide an overview of UWB based localization and ranging techniques.","PeriodicalId":143107,"journal":{"name":"2011 IEEE International Conference on Ultra-Wideband (ICUWB)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114801791","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}
Pub Date : 2011-10-24DOI: 10.1109/ICUWB.2011.6058812
J. Chong, Hyundong Shin, M. Win
In this paper, we analyze and model the operation of prioritized contention access (PCA) devices in the presence of the distributed reservation protocol (DRP) devices in high rate WiMedia networks. The analysis model is basically based on a Markov chain concept, yet the Markov chain concept itself has a limitation that the dependency among Markov chains, representing PCA devices, caused by PCA transmission deferment during DRP intervals cannot be reflected in it. We analyze this deferment phenomenon of PCA transmissions due to the existence of intermittent DRP intervals, mathematically formulate it, and supplement the Markov chain-based model by this formulation. Analytical results obtained from the proposed model agree more precisely with simulation results compared to those from conventional one and show that the saturated throughput of PCA devices decrease as the intermittent DRP intervals occur frequently.
{"title":"WiMedia networks in the presence of hard DRP devices","authors":"J. Chong, Hyundong Shin, M. Win","doi":"10.1109/ICUWB.2011.6058812","DOIUrl":"https://doi.org/10.1109/ICUWB.2011.6058812","url":null,"abstract":"In this paper, we analyze and model the operation of prioritized contention access (PCA) devices in the presence of the distributed reservation protocol (DRP) devices in high rate WiMedia networks. The analysis model is basically based on a Markov chain concept, yet the Markov chain concept itself has a limitation that the dependency among Markov chains, representing PCA devices, caused by PCA transmission deferment during DRP intervals cannot be reflected in it. We analyze this deferment phenomenon of PCA transmissions due to the existence of intermittent DRP intervals, mathematically formulate it, and supplement the Markov chain-based model by this formulation. Analytical results obtained from the proposed model agree more precisely with simulation results compared to those from conventional one and show that the saturated throughput of PCA devices decrease as the intermittent DRP intervals occur frequently.","PeriodicalId":143107,"journal":{"name":"2011 IEEE International Conference on Ultra-Wideband (ICUWB)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123018253","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}
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