Pub Date : 2003-11-16DOI: 10.1109/UWBST.2003.1267842
P. Pajusco, P. Pagani
Good knowledge of transmission channel properties is necessary to study the performances of future UWB systems. Thus, efficient equipment is required to characterize and model the UWB propagation channel. This paper proposes a basic idea to convert a SIMO wideband channel sounder into an UWB channel sounder. These minor changes were applied to the France Telecom R&D channel sounder. The modified equipment enables real time measurement in the 3.1 10.6 GHz frequency band with more than 1 GHz bandwidth.
{"title":"Extension of SIMO wideband channel sounder for UWB propagation experiment","authors":"P. Pajusco, P. Pagani","doi":"10.1109/UWBST.2003.1267842","DOIUrl":"https://doi.org/10.1109/UWBST.2003.1267842","url":null,"abstract":"Good knowledge of transmission channel properties is necessary to study the performances of future UWB systems. Thus, efficient equipment is required to characterize and model the UWB propagation channel. This paper proposes a basic idea to convert a SIMO wideband channel sounder into an UWB channel sounder. These minor changes were applied to the France Telecom R&D channel sounder. The modified equipment enables real time measurement in the 3.1 10.6 GHz frequency band with more than 1 GHz bandwidth.","PeriodicalId":218975,"journal":{"name":"IEEE Conference on Ultra Wideband Systems and Technologies, 2003","volume":"107 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114541839","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 : 2003-11-16DOI: 10.1109/UWBST.2003.1267846
A. Trindade, Quang Hieu Dang, A. van der Veen
This paper presents a signal processing model for the delay-hopped transmit-reference ultra wideband communications system introduced by Hoctor and Tomlinson. In that paper, a single-user receiver based on a bank of correlators and a sliding window integrator was proposed. However, the radio propagation channel also introduces correlations, which have a significant effect not taken into account by the Hoctor-Tomlinson receiver. Here we propose an accurate signal processing model for the transmit-reference system, including the effect of the propagation channel, as well as an algorithm to estimate the resulting effective channel coefficients.
{"title":"Signal processing model for a transmit-reference UWB wireless communication system","authors":"A. Trindade, Quang Hieu Dang, A. van der Veen","doi":"10.1109/UWBST.2003.1267846","DOIUrl":"https://doi.org/10.1109/UWBST.2003.1267846","url":null,"abstract":"This paper presents a signal processing model for the delay-hopped transmit-reference ultra wideband communications system introduced by Hoctor and Tomlinson. In that paper, a single-user receiver based on a bank of correlators and a sliding window integrator was proposed. However, the radio propagation channel also introduces correlations, which have a significant effect not taken into account by the Hoctor-Tomlinson receiver. Here we propose an accurate signal processing model for the transmit-reference system, including the effect of the propagation channel, as well as an algorithm to estimate the resulting effective channel coefficients.","PeriodicalId":218975,"journal":{"name":"IEEE Conference on Ultra Wideband Systems and Technologies, 2003","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123979463","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 : 2003-11-16DOI: 10.1109/UWBST.2003.1267850
J. Kunisch, J. Pamp
We present a generic ultra-wideband (UWB) multipath radio channel model that has been designed for link-level simulations and is suited for indoor environments, e.g. for WPAN applications. It covers the FCC frequency band [FCC, Feb. 2002] and is capable of producing space-variant impulse responses (IR) and transfer functions. The model is of a hybrid type and combines a statistical approach to model dense multipath and a simple quasi-deterministic method to model strong individual echoes. These echoes are important to obtain a realistic spatial (Doppler) behavior. The architecture of the model facilitates the application to UWB MIMO analyses. For a few scenarios (e.g., intra-office and inter-office transmission), site-specific parameter profiles are given that have been derived from measured data.
{"title":"An ultra-wideband space-variant multipath indoor radio channel model","authors":"J. Kunisch, J. Pamp","doi":"10.1109/UWBST.2003.1267850","DOIUrl":"https://doi.org/10.1109/UWBST.2003.1267850","url":null,"abstract":"We present a generic ultra-wideband (UWB) multipath radio channel model that has been designed for link-level simulations and is suited for indoor environments, e.g. for WPAN applications. It covers the FCC frequency band [FCC, Feb. 2002] and is capable of producing space-variant impulse responses (IR) and transfer functions. The model is of a hybrid type and combines a statistical approach to model dense multipath and a simple quasi-deterministic method to model strong individual echoes. These echoes are important to obtain a realistic spatial (Doppler) behavior. The architecture of the model facilitates the application to UWB MIMO analyses. For a few scenarios (e.g., intra-office and inter-office transmission), site-specific parameter profiles are given that have been derived from measured data.","PeriodicalId":218975,"journal":{"name":"IEEE Conference on Ultra Wideband Systems and Technologies, 2003","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115092146","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 : 2003-11-16DOI: 10.1109/UWBST.2003.1267804
D. Zeng, A. Annamalai, A. Zaghloul
This article develops an optimal pulse shaping filter design framework, which minimizes UWB signal interference to existing (or legacy) narrow band signals, such as global positioning system (GPS), satellite communication systems, etc. A 2-stage optimal filter design procedure is proposed. In the first stage, a transmission filter is optimized to satisfy an imposed transmission mask, which minimizes UWB interference to a tolerable level. In the sub-sequent optimization stage, a recovery filter is optimized to best recover the transmitted signal. The effectiveness of this procedure is demonstrated with an example, in which FCC indoor transmission spectral mask is used to design the transmission filter. This procedure makes it possible to best recover the transmitted signal while minimizing the UWB interference to other legacy systems.
{"title":"Pulse shaping filter design in UWB system","authors":"D. Zeng, A. Annamalai, A. Zaghloul","doi":"10.1109/UWBST.2003.1267804","DOIUrl":"https://doi.org/10.1109/UWBST.2003.1267804","url":null,"abstract":"This article develops an optimal pulse shaping filter design framework, which minimizes UWB signal interference to existing (or legacy) narrow band signals, such as global positioning system (GPS), satellite communication systems, etc. A 2-stage optimal filter design procedure is proposed. In the first stage, a transmission filter is optimized to satisfy an imposed transmission mask, which minimizes UWB interference to a tolerable level. In the sub-sequent optimization stage, a recovery filter is optimized to best recover the transmitted signal. The effectiveness of this procedure is demonstrated with an example, in which FCC indoor transmission spectral mask is used to design the transmission filter. This procedure makes it possible to best recover the transmitted signal while minimizing the UWB interference to other legacy systems.","PeriodicalId":218975,"journal":{"name":"IEEE Conference on Ultra Wideband Systems and Technologies, 2003","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115374061","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 : 2003-11-16DOI: 10.1109/UWBST.2003.1267792
H. Schantz
This paper presents an introduction to ultra-wideband (UWB) antennas, including a summary of key UWB antenna concepts, as well as system and network considerations, and fundamental limits for UWB antennas.
{"title":"Introduction to ultra-wideband antennas","authors":"H. Schantz","doi":"10.1109/UWBST.2003.1267792","DOIUrl":"https://doi.org/10.1109/UWBST.2003.1267792","url":null,"abstract":"This paper presents an introduction to ultra-wideband (UWB) antennas, including a summary of key UWB antenna concepts, as well as system and network considerations, and fundamental limits for UWB antennas.","PeriodicalId":218975,"journal":{"name":"IEEE Conference on Ultra Wideband Systems and Technologies, 2003","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115353350","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 : 2003-11-16DOI: 10.1109/UWBST.2003.1267844
B. Denis, J. Keignart
This paper proposes a general framework that allows one to retrieve accurate UWB channel parameters from band-limited vector network analyzer (VNA) measurements. It is demonstrated that a specific post-processing technique, including a passband Hermitian reconstruction (PHR) and an estimation algorithm based on the frequency domain maximum likelihood criterion (FDML), makes it possible to reach super-resolution from band-limited measurements. Whereas the short bandwidth results in a poor precision when estimating differential path delays with traditional processing, the proposed method provides much thinner temporal precision, resolution and even actual path polarity.
{"title":"Post-processing framework for enhanced UWB channel modeling from band-limited measurements","authors":"B. Denis, J. Keignart","doi":"10.1109/UWBST.2003.1267844","DOIUrl":"https://doi.org/10.1109/UWBST.2003.1267844","url":null,"abstract":"This paper proposes a general framework that allows one to retrieve accurate UWB channel parameters from band-limited vector network analyzer (VNA) measurements. It is demonstrated that a specific post-processing technique, including a passband Hermitian reconstruction (PHR) and an estimation algorithm based on the frequency domain maximum likelihood criterion (FDML), makes it possible to reach super-resolution from band-limited measurements. Whereas the short bandwidth results in a poor precision when estimating differential path delays with traditional processing, the proposed method provides much thinner temporal precision, resolution and even actual path polarity.","PeriodicalId":218975,"journal":{"name":"IEEE Conference on Ultra Wideband Systems and Technologies, 2003","volume":"76 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116402642","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 : 2003-11-16DOI: 10.1109/UWBST.2003.1267881
K. Marsden, Hyung-Jin Lee, D. Ha, Hyung-Soo Lee
In this paper we discuss the design of a CMOS based pulse generator for impulse-based UWB systems. The basic structure of our design involves a power amplifier with four control taps, which essentially decides the shape of the generated pulse. The design is versatile and may be used in a variety of UWB modulation schemes and systems. In addition, this design can also be incorporated into a multiband approach as a rectified cosine generator.
{"title":"Low power CMOS re-programmable pulse generator for UWB systems","authors":"K. Marsden, Hyung-Jin Lee, D. Ha, Hyung-Soo Lee","doi":"10.1109/UWBST.2003.1267881","DOIUrl":"https://doi.org/10.1109/UWBST.2003.1267881","url":null,"abstract":"In this paper we discuss the design of a CMOS based pulse generator for impulse-based UWB systems. The basic structure of our design involves a power amplifier with four control taps, which essentially decides the shape of the generated pulse. The design is versatile and may be used in a variety of UWB modulation schemes and systems. In addition, this design can also be incorporated into a multiband approach as a rectified cosine generator.","PeriodicalId":218975,"journal":{"name":"IEEE Conference on Ultra Wideband Systems and Technologies, 2003","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115616265","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 : 2003-11-16DOI: 10.1109/UWBST.2003.1267871
N. Correal, S. Kyperountas, Qicai Shi, M. Welborn
This paper describes an UWB location system that employs relative location principles to provide enhanced location performance in wireless networks. The system takes advantage of peer-to-peer range measurements between the devices and their neighbors. The collective range information is used to jointly estimate the location of the devices in the network providing enhanced performance.
{"title":"An UWB relative location system","authors":"N. Correal, S. Kyperountas, Qicai Shi, M. Welborn","doi":"10.1109/UWBST.2003.1267871","DOIUrl":"https://doi.org/10.1109/UWBST.2003.1267871","url":null,"abstract":"This paper describes an UWB location system that employs relative location principles to provide enhanced location performance in wireless networks. The system takes advantage of peer-to-peer range measurements between the devices and their neighbors. The collective range information is used to jointly estimate the location of the devices in the network providing enhanced performance.","PeriodicalId":218975,"journal":{"name":"IEEE Conference on Ultra Wideband Systems and Technologies, 2003","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121348394","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 : 2003-11-16DOI: 10.1109/UWBST.2003.1267832
L. D. De Nardis, G. Giancola, M. Di Benedetto
In this paper a position based routing strategy which exploits the high precision ranging capabilities offered by ultra-wide band (UWB) is presented. It is shown that if a position-aware routing protocol and a power-aware routing metric based on ranging measurements are adopted, emitted power levels as well as multi-user interference are significantly reduced. The position-aware strategy is compared with standard solutions based on the minimization of the number of hops and on-demand routing. Results are presented for various transmission ranges, i.e. network connectivity conditions. Both power efficiency and routing performance are taken into account in the analysis and trade-offs between these two features are finally discussed.
{"title":"A position based routing strategy for UWB networks","authors":"L. D. De Nardis, G. Giancola, M. Di Benedetto","doi":"10.1109/UWBST.2003.1267832","DOIUrl":"https://doi.org/10.1109/UWBST.2003.1267832","url":null,"abstract":"In this paper a position based routing strategy which exploits the high precision ranging capabilities offered by ultra-wide band (UWB) is presented. It is shown that if a position-aware routing protocol and a power-aware routing metric based on ranging measurements are adopted, emitted power levels as well as multi-user interference are significantly reduced. The position-aware strategy is compared with standard solutions based on the minimization of the number of hops and on-demand routing. Results are presented for various transmission ranges, i.e. network connectivity conditions. Both power efficiency and routing performance are taken into account in the analysis and trade-offs between these two features are finally discussed.","PeriodicalId":218975,"journal":{"name":"IEEE Conference on Ultra Wideband Systems and Technologies, 2003","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126483091","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 : 2003-11-16DOI: 10.1109/UWBST.2003.1267796
R. Buehrer, W. Davis, A. Safaai-Jazi, D. Sweeney
This paper provides an overview and preliminary results from an ultra-wideband (UWB) channel measurement and modeling campaign performed at Virginia Tech as part of DARPA's "Networking in extreme environments (NETEX)" program. The project includes large scale and small scale channel measurements using various antennas. The environments examined include indoor, outdoor, and indoor-to-outdoor although only the former are discussed here.
{"title":"Characterization of the ultra-wideband channel","authors":"R. Buehrer, W. Davis, A. Safaai-Jazi, D. Sweeney","doi":"10.1109/UWBST.2003.1267796","DOIUrl":"https://doi.org/10.1109/UWBST.2003.1267796","url":null,"abstract":"This paper provides an overview and preliminary results from an ultra-wideband (UWB) channel measurement and modeling campaign performed at Virginia Tech as part of DARPA's \"Networking in extreme environments (NETEX)\" program. The project includes large scale and small scale channel measurements using various antennas. The environments examined include indoor, outdoor, and indoor-to-outdoor although only the former are discussed here.","PeriodicalId":218975,"journal":{"name":"IEEE Conference on Ultra Wideband Systems and Technologies, 2003","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121618380","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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