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.2003.1267812
Bo Hu, N. Beaulieu
A time-hopping sequence is used in ultra-wideband wireless systems to eliminate catastrophic collisions in multiaccess communication environments. A new analytical method based on a characteristic function technique is proposed for precisely calculating the bit error probability of time-hopping pulse position modulation ultra-wideband systems with multiple access interference. The analytical expression is verified by simulation and used to assess the accuracy of the Gaussian approximation. The Gaussian approximation is shown to be inaccurate for predicting bit error rates for medium and large signal-to-noise ratio values.
{"title":"Precise bit error rate of TH-PPM UWB systems in the presence of multiple access interference","authors":"Bo Hu, N. Beaulieu","doi":"10.1109/UWBST.2003.1267812","DOIUrl":"https://doi.org/10.1109/UWBST.2003.1267812","url":null,"abstract":"A time-hopping sequence is used in ultra-wideband wireless systems to eliminate catastrophic collisions in multiaccess communication environments. A new analytical method based on a characteristic function technique is proposed for precisely calculating the bit error probability of time-hopping pulse position modulation ultra-wideband systems with multiple access interference. The analytical expression is verified by simulation and used to assess the accuracy of the Gaussian approximation. The Gaussian approximation is shown to be inaccurate for predicting bit error rates for medium and large signal-to-noise ratio values.","PeriodicalId":218975,"journal":{"name":"IEEE Conference on Ultra Wideband Systems and Technologies, 2003","volume":"126 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":"130116755","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.2003.1267870
W. Chung, D. Ha
This paper investigates a ranging method employing ultra wideband (UWB) pulses under the existence of the line of sight (LOS) path in a multipath environment. Our method is based on the estimation of time of arrival of the first multipath. It averages the received pulses over multiple time frames, performs a correlation operation on the averaged signal, and detects the peak of the correlated signal. Our method reduces the ranging accuracy over conventional methods, and its accuracy is close to the Cramer-Rao lower bound (CRLB) on even for a low SNR.
{"title":"An accurate ultra wideband (UWB) ranging for precision asset location","authors":"W. Chung, D. Ha","doi":"10.1109/UWBST.2003.1267870","DOIUrl":"https://doi.org/10.1109/UWBST.2003.1267870","url":null,"abstract":"This paper investigates a ranging method employing ultra wideband (UWB) pulses under the existence of the line of sight (LOS) path in a multipath environment. Our method is based on the estimation of time of arrival of the first multipath. It averages the received pulses over multiple time frames, performs a correlation operation on the averaged signal, and detects the peak of the correlated signal. Our method reduces the ranging accuracy over conventional methods, and its accuracy is close to the Cramer-Rao lower bound (CRLB) on even for a low SNR.","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":"130156919","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.2003.1267809
D. McKinstry, R. Buehrer
The impact of narrowband interference on ultra-wideband (UWB) communications systems and inversely, the impact of UWB signals on narrowband systems are discussed. An analog and digital narrowband rejection system for UWB receivers is presented and evaluated. This rejection system is shown to offer significant communications system improvement in the presence of strong interferers.
{"title":"LMS analog and digital narrowband rejection system for UWB communications","authors":"D. McKinstry, R. Buehrer","doi":"10.1109/UWBST.2003.1267809","DOIUrl":"https://doi.org/10.1109/UWBST.2003.1267809","url":null,"abstract":"The impact of narrowband interference on ultra-wideband (UWB) communications systems and inversely, the impact of UWB signals on narrowband systems are discussed. An analog and digital narrowband rejection system for UWB receivers is presented and evaluated. This rejection system is shown to offer significant communications system improvement in the presence of strong interferers.","PeriodicalId":218975,"journal":{"name":"IEEE Conference on Ultra Wideband Systems and Technologies, 2003","volume":"35 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":"134424410","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.2003.1267888
G. Oßberger, T. Buchegger, K. Pourvoyeur, E. Schimback, A. Stelzer, R. Weigel
In this paper a novel method for ultra-wideband object characterization using a single A-scan is presented. The impulse response of the arrangement at a single measurement position is called an A-scan. The data of an A-scan is processed with the novel wavelet based pulse reconstruction to determine five parameters of the pulse approximation. The width of different copper plates can be characterized by the dilatation of the reconstructed pulse which is one of the five parameters. To get real radar reflection data an ultra-wideband impulse radar setup was used. The presented results testify, that there is a direct link between the parameter dilatation factor and the width of a centered copper plate. To verify the results of the measurement analysis a simulation tool was developed. The presented results of the simulation accord very good with the measurement.
{"title":"Ultra-wideband object characterization via A-scan","authors":"G. Oßberger, T. Buchegger, K. Pourvoyeur, E. Schimback, A. Stelzer, R. Weigel","doi":"10.1109/UWBST.2003.1267888","DOIUrl":"https://doi.org/10.1109/UWBST.2003.1267888","url":null,"abstract":"In this paper a novel method for ultra-wideband object characterization using a single A-scan is presented. The impulse response of the arrangement at a single measurement position is called an A-scan. The data of an A-scan is processed with the novel wavelet based pulse reconstruction to determine five parameters of the pulse approximation. The width of different copper plates can be characterized by the dilatation of the reconstructed pulse which is one of the five parameters. To get real radar reflection data an ultra-wideband impulse radar setup was used. The presented results testify, that there is a direct link between the parameter dilatation factor and the width of a centered copper plate. To verify the results of the measurement analysis a simulation tool was developed. The presented results of the simulation accord very good with the measurement.","PeriodicalId":218975,"journal":{"name":"IEEE Conference on Ultra Wideband Systems and Technologies, 2003","volume":"38 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":"121802408","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.2003.1267797
J. Schaffner, A. Schmitz, T. Hsu, D. Chang, R. Loo, D. Sievenpiper
Metal contact RF MEMS switch circuit elements have been developed to be used as building blocks for wideband signal routing. A switch element can have up to four switches fabricated monolithically on a single GaAs chip. More complicated switch circuits can be constructed by assembling multiple basic switch elements on a hybrid RF interconnection printed circuit board. In this paper, two basic types of switch functions are presented, single-pole multiple-throw switch elements and matrix switch elements. Measured insertion loss and isolation performances of these circuits are presented.
{"title":"Metal contact RF MEMS switch elements for ultra wideband RF front-end systems","authors":"J. Schaffner, A. Schmitz, T. Hsu, D. Chang, R. Loo, D. Sievenpiper","doi":"10.1109/UWBST.2003.1267797","DOIUrl":"https://doi.org/10.1109/UWBST.2003.1267797","url":null,"abstract":"Metal contact RF MEMS switch circuit elements have been developed to be used as building blocks for wideband signal routing. A switch element can have up to four switches fabricated monolithically on a single GaAs chip. More complicated switch circuits can be constructed by assembling multiple basic switch elements on a hybrid RF interconnection printed circuit board. In this paper, two basic types of switch functions are presented, single-pole multiple-throw switch elements and matrix switch elements. Measured insertion loss and isolation performances of these circuits are presented.","PeriodicalId":218975,"journal":{"name":"IEEE Conference on Ultra Wideband Systems and Technologies, 2003","volume":"178 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":"115722200","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.2003.1267882
I. S. Lu, N. Weste, S. Parameswaran
This paper presents for the first time the circuit parameter analysis of a digital multiband-UWB transceiver, encompassing a novel low-power sub-band generator. This sub-band generator is capable of producing multiple frequency bands, enabling sub-band generation from 3 to 10 GHz with nanosecond switching times. The circuit analysis of the complete transceiver is used to set parameters of components. The analysis indicate that a LNA gain of 20 dB, baseband amplifier gain of 45 dB, matched filter accuracy of five bits, ADC accuracy of two bits, a 60 dB dynamic range of the multi-frequency generator, and front end offset voltage of less than 30 mV is required to achieve a 10 dB SNR. Hspice simulation utilizing 0.35 /spl mu/m CMOS technology suggest that the power consumption of the sub-band generator is 8 mW from a 1.8 V power supply.
{"title":"A digital ultra-wideband multiband transceiver architecture with fast frequency hopping capabilities","authors":"I. S. Lu, N. Weste, S. Parameswaran","doi":"10.1109/UWBST.2003.1267882","DOIUrl":"https://doi.org/10.1109/UWBST.2003.1267882","url":null,"abstract":"This paper presents for the first time the circuit parameter analysis of a digital multiband-UWB transceiver, encompassing a novel low-power sub-band generator. This sub-band generator is capable of producing multiple frequency bands, enabling sub-band generation from 3 to 10 GHz with nanosecond switching times. The circuit analysis of the complete transceiver is used to set parameters of components. The analysis indicate that a LNA gain of 20 dB, baseband amplifier gain of 45 dB, matched filter accuracy of five bits, ADC accuracy of two bits, a 60 dB dynamic range of the multi-frequency generator, and front end offset voltage of less than 30 mV is required to achieve a 10 dB SNR. Hspice simulation utilizing 0.35 /spl mu/m CMOS technology suggest that the power consumption of the sub-band generator is 8 mW from a 1.8 V power supply.","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":"125538133","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.2003.1267808
Hyung-Jin Lee, D. Ha, Hyung-Soo Lee
In this work, we propose a new approach to process received signals in the frequency-domain, which opens the possibility for CMOS implementation of all-digital ultra wideband receivers. The key idea for the proposed method is to extract the frequency components of the received signal and to perform signal processing in the frequency domain. The proposed receiver architecture relaxes the speed requirement of analog-to-digital converters and is highly suitable for a multipath rich environment such as UWB. Our simulation results indicate that the proposed receiver improves the SNR by about 3 dB at BER=10/sup -1/ when compared with an analog receiver under multi-path channel conditions.
{"title":"A frequency-domain approach for all-digital CMOS ultra wideband receivers","authors":"Hyung-Jin Lee, D. Ha, Hyung-Soo Lee","doi":"10.1109/UWBST.2003.1267808","DOIUrl":"https://doi.org/10.1109/UWBST.2003.1267808","url":null,"abstract":"In this work, we propose a new approach to process received signals in the frequency-domain, which opens the possibility for CMOS implementation of all-digital ultra wideband receivers. The key idea for the proposed method is to extract the frequency components of the received signal and to perform signal processing in the frequency domain. The proposed receiver architecture relaxes the speed requirement of analog-to-digital converters and is highly suitable for a multipath rich environment such as UWB. Our simulation results indicate that the proposed receiver improves the SNR by about 3 dB at BER=10/sup -1/ when compared with an analog receiver under multi-path channel conditions.","PeriodicalId":218975,"journal":{"name":"IEEE Conference on Ultra Wideband Systems and Technologies, 2003","volume":"12 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":"117179706","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.2003.1267838
S. de Rivaz, B. Denis, J. Keignart, M. Pezzin, N. Daniele, D. Morche
Ultra wideband (UWB) systems are characterized by the transmission of very low power spectral density signals using bandwidths from 500 MHz up to several GHz and propagating through dense multipath channels. Digital communications using UWB impulse radio concern, among others, high data rate transmissions, for instance between 1 Mbps and 1 Gbps. The aim of this analysis is to define a generic UWB model, in terms of signal shape, modulation scheme and channel representation. Then, this model is used to specify and evaluate a brand-new principle of UWB receiver based on a mono band complex processing and maximum ratio combining.
{"title":"Performances analysis of a UWB receiver using complex processing","authors":"S. de Rivaz, B. Denis, J. Keignart, M. Pezzin, N. Daniele, D. Morche","doi":"10.1109/UWBST.2003.1267838","DOIUrl":"https://doi.org/10.1109/UWBST.2003.1267838","url":null,"abstract":"Ultra wideband (UWB) systems are characterized by the transmission of very low power spectral density signals using bandwidths from 500 MHz up to several GHz and propagating through dense multipath channels. Digital communications using UWB impulse radio concern, among others, high data rate transmissions, for instance between 1 Mbps and 1 Gbps. The aim of this analysis is to define a generic UWB model, in terms of signal shape, modulation scheme and channel representation. Then, this model is used to specify and evaluate a brand-new principle of UWB receiver based on a mono band complex processing and maximum ratio combining.","PeriodicalId":218975,"journal":{"name":"IEEE Conference on Ultra Wideband Systems and Technologies, 2003","volume":"15 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":"131788653","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.2003.1267817
L. Reggiani, G. M. Maggio
UWB (ultra-wideband) is a promising technology for short-range wireless communications, like in WPAN (wireless personal area networks) applications. In the context of UWB impulse radio, one of the crucial challenges remains the acquisition of synchronization in terms of time, precision and number of operations. In this paper, we present a novel strategy for reducing the number of operations required for the coarse acquisition of pseudo-noise sequences (at the chip level), thus speeding up the overall synchronization process. Also, we discuss the trade-off between computational load and synchronization performance.
{"title":"A reduced-complexity acquisition algorithm for UWB impulse radio","authors":"L. Reggiani, G. M. Maggio","doi":"10.1109/UWBST.2003.1267817","DOIUrl":"https://doi.org/10.1109/UWBST.2003.1267817","url":null,"abstract":"UWB (ultra-wideband) is a promising technology for short-range wireless communications, like in WPAN (wireless personal area networks) applications. In the context of UWB impulse radio, one of the crucial challenges remains the acquisition of synchronization in terms of time, precision and number of operations. In this paper, we present a novel strategy for reducing the number of operations required for the coarse acquisition of pseudo-noise sequences (at the chip level), thus speeding up the overall synchronization process. Also, we discuss the trade-off between computational load and synchronization performance.","PeriodicalId":218975,"journal":{"name":"IEEE Conference on Ultra Wideband Systems and Technologies, 2003","volume":"630 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":"131621122","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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