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Int. J. Ultra Wideband Commun. Syst.最新文献

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Identifying and filtering noise caused by sensor set switching in UWB indoor position tracking 超宽带室内位置跟踪中传感器组切换噪声的识别与滤波
Int. J. Ultra Wideband Commun. Syst. Pub Date : 2014-05-27 DOI: 10.1504/IJUWBCS.2014.060970
Salil Banerjee, William C. Suski, A. Hoover
{"title":"Identifying and filtering noise caused by sensor set switching in UWB indoor position tracking","authors":"Salil Banerjee, William C. Suski, A. Hoover","doi":"10.1504/IJUWBCS.2014.060970","DOIUrl":"https://doi.org/10.1504/IJUWBCS.2014.060970","url":null,"abstract":"Trilateration calculations are affected by errors in distance measurements from the set of fixed points to the object of interest. When these errors are systemic, each distinct set of fixed points can be said to exhibit a unique set noise. For ultra-wideband (UWB) indoor position tracking, the set of fixed points is a set of sensors measuring the distance to a tracked tag. In this paper we develop a noise model for this sensor set noise, along with a particle filter that uses our set noise model. We test our methods on a real UWB system. Our methods showed an approximately 15% improvement in accuracy over the raw measurements.","PeriodicalId":294875,"journal":{"name":"Int. J. Ultra Wideband Commun. Syst.","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123392502","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
UWB outdoor channel environments: analysis of experimental data collection and comparison to IEEE 802.l5.4a UWB channel model UWB室外信道环境:实验数据采集分析，并与IEEE 802.l5.4a UWB信道模型进行比较
Int. J. Ultra Wideband Commun. Syst. Pub Date : 2014-05-27 DOI: 10.1504/IJUWBCS.2014.060968
P. Richardson, Weidong Xiang, Dan Shan
{"title":"UWB outdoor channel environments: analysis of experimental data collection and comparison to IEEE 802.l5.4a UWB channel model","authors":"P. Richardson, Weidong Xiang, Dan Shan","doi":"10.1504/IJUWBCS.2014.060968","DOIUrl":"https://doi.org/10.1504/IJUWBCS.2014.060968","url":null,"abstract":"The use of ultra wideband (UWB) radio technology in outdoor environments at longer ranges is gaining interest in a number of application areas. This effort presents the results of a UWB channel model study based on a data collection campaign in three outdoor channel environments: open campus, dense forest, and urban at distances up to 70 m. The aim is to present fundamental results in different channel conditions so as to lay the groundwork for developing effective outdoor UWB systems. Parameters extracted from the experimental data closely match parameters generated by the IEEE 802.15.4a UWB channel model, indicating that this model can be used to analyse properties of a wider range of outdoor channel environments than has been reported. The frequency dependent path loss and channel capacity, calculated for each channel, indicate that UWB is a feasible candidate for several longer range outdoor applications.","PeriodicalId":294875,"journal":{"name":"Int. J. Ultra Wideband Commun. Syst.","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126957867","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
Analysis of power spectral density of ultra wideband waveforms for pulse shape modulation 脉冲形状调制超宽带波形的功率谱密度分析
Int. J. Ultra Wideband Commun. Syst. Pub Date : 2014-05-27 DOI: 10.1504/IJUWBCS.2014.060978
D. Adhikari, C. Bhattacharya
{"title":"Analysis of power spectral density of ultra wideband waveforms for pulse shape modulation","authors":"D. Adhikari, C. Bhattacharya","doi":"10.1504/IJUWBCS.2014.060978","DOIUrl":"https://doi.org/10.1504/IJUWBCS.2014.060978","url":null,"abstract":"Choice of ultra wideband (UWB) pulse shapes has become an interesting challenge such that the spectral limits of the frequency band approved by the Federal Communications Commission (FCC) can be utilised efficiently. In this paper, we compare the efficiency of various UWB pulse shapes based upon their power spectral density (PSD) and autocorrelation functions (ACF). We propose a set of prolate spheroidal wave functions (PSWF) for a typical M-ary pulse shape modulation (PSM) scheme. In the process, we show closed form expressions for the ACF of PSWF-based UWB pulse shapes of different orders.","PeriodicalId":294875,"journal":{"name":"Int. J. Ultra Wideband Commun. Syst.","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121502205","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: 1
A new technique for environment identification in impulsive radio systems 脉冲无线电系统环境识别新技术
Int. J. Ultra Wideband Commun. Syst. Pub Date : 2012-12-17 DOI: 10.1504/IJUWBCS.2012.051045
L. Mucchi, T. Landi
{"title":"A new technique for environment identification in impulsive radio systems","authors":"L. Mucchi, T. Landi","doi":"10.1504/IJUWBCS.2012.051045","DOIUrl":"https://doi.org/10.1504/IJUWBCS.2012.051045","url":null,"abstract":"Current wireless communication systems strongly need to know whether a line-of-sight (LOS) or non-LOS (NLOS) path is present between transmitter and receiver. The next generation wireless communication and localisation systems will require a more accurate environment identification in order to ensure a given level of QoS. In this paper we introduce a new environment identification technique which is able to identify not only the LOS/NLOS condition but also the typology of environment in which the transmitter and receiver operate: this allows both a more accurate localisation of all the users and a proper configuration of the receiver to best adapt to the propagation (cognitive approach) or network (cooperative approach) conditions. Unlike the techniques previously discussed in the literature, the one herein proposed does not require any estimation (ex. of channel parameters), while it is only based on a statistical analysis of the raw received UWB probe signal.","PeriodicalId":294875,"journal":{"name":"Int. J. Ultra Wideband Commun. Syst.","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127310629","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
Genetic algorithm-based energy-efficient protocol for wireless sensor networks 基于遗传算法的无线传感器网络节能协议
Int. J. Ultra Wideband Commun. Syst. Pub Date : 2012-12-17 DOI: 10.1504/IJUWBCS.2012.051042
D. Karia, V. Godbole
{"title":"Genetic algorithm-based energy-efficient protocol for wireless sensor networks","authors":"D. Karia, V. Godbole","doi":"10.1504/IJUWBCS.2012.051042","DOIUrl":"https://doi.org/10.1504/IJUWBCS.2012.051042","url":null,"abstract":"The development of genetic algorithm (GA) to improve the performance of low energy adaptive clustering hierarchy (LEACH) is presented in this paper. In the proposed protocol initialisation, population, crossover, mutation and fitness functions are calculated. In this proposed protocol, GA facilitates the process of selecting the optimal cluster head. We employ that a set of the cluster head is a chromosome. As time evolves, these chromosomes are given different chances to reproduce according to their fitness. In the reproduction, one chromosome will probably mutate or two chromosomes can crossover. After many generations, one expects the optimum chromosomes or solutions that will emerge from the population. Simulation results show that the proposed genetic-algorithm-based protocol effectively produces optimal energy consumption for the wireless sensor networks, and resulting in an extension of lifetime for the network.","PeriodicalId":294875,"journal":{"name":"Int. J. Ultra Wideband Commun. Syst.","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130370750","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
Performance of constrained blind adaptive DS-CDMA UWB multiuser detector in multipath channel with IEEE 802.11a interference IEEE 802.11a干扰下约束盲自适应DS-CDMA超宽带多用户检测器性能研究
Int. J. Ultra Wideband Commun. Syst. Pub Date : 2012-12-17 DOI: 10.1504/IJUWBCS.2012.051044
G. Biradar, S. Merchant, U. Desai
{"title":"Performance of constrained blind adaptive DS-CDMA UWB multiuser detector in multipath channel with IEEE 802.11a interference","authors":"G. Biradar, S. Merchant, U. Desai","doi":"10.1504/IJUWBCS.2012.051044","DOIUrl":"https://doi.org/10.1504/IJUWBCS.2012.051044","url":null,"abstract":"Ultra wideband wireless systems are supposed to coexist with other spectrally overlapping narrowband wireless systems especially IEEE 802.11a wireless LAN. Presence of narrowband interference degrades the performance of UWB. In this paper we study bit error probability performance of the constrained blind DS-CDMA UWB multi-user detection algorithms in the presence of IEEE 802.11a OFDM narrowband interference. The constrained blind adaptive algorithm is implemented using both least mean square and recursive least square algorithm and the bit error probability performance is compared with Rake matched filter receiver. The constrained blind receiver does not require spreading code knowledge of all users other than that of the user of interest. Simulation results show that the constrained blind detector cancels IEEE 802.11a interference significantly in comparison with that of the Rake matched filter in the UWB multipath channel.","PeriodicalId":294875,"journal":{"name":"Int. J. Ultra Wideband Commun. Syst.","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129126464","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
Analysis of ultra wideband generator based on transient response of notch filter 基于陷波滤波器瞬态响应的超宽带发生器分析
Int. J. Ultra Wideband Commun. Syst. Pub Date : 2012-12-17 DOI: 10.1504/IJUWBCS.2012.051048
R. Thai-Singama, F. Burck
{"title":"Analysis of ultra wideband generator based on transient response of notch filter","authors":"R. Thai-Singama, F. Burck","doi":"10.1504/IJUWBCS.2012.051048","DOIUrl":"https://doi.org/10.1504/IJUWBCS.2012.051048","url":null,"abstract":"A short pulse generator based on a notch filter centred at the carrier frequency of a local oscillator is analysed. Two approaches are investigated to achieve adaptation to Federal Communication Commission (FCC) indoor frequency mask. In the first approach, the pulse spectrum respects the mask at high frequencies and a high-pass filter is used for adaptation at low-frequencies. A 3rd-order Butterworth filter is a good compromise between circuit complexity, adaptation to the mask and pulse duration. Duration of 350 ps at 5% is achievable. In the second approach, the pulse spectral width is greater than the frequency mask and a band-pass filter is used. Various filters are studied and a prototype is made with a 3rd-order Hourglass filter. This approach, less sensitive to practical limitations can be applied to any frequency mask as it is experimentally demonstrated for the mask imposed by the European Telecommunication Standards Institute (ETSI).","PeriodicalId":294875,"journal":{"name":"Int. J. Ultra Wideband Commun. Syst.","volume":"117 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124338891","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: 1
Channel modelling and performance evaluation of UWB-based wireless body area networks 基于uwb的无线体域网络信道建模与性能评估
Int. J. Ultra Wideband Commun. Syst. Pub Date : 2012-12-17 DOI: 10.1504/IJUWBCS.2012.051053
K. Takizawa, T. Aoyagi, K. Hamaguchi, R. Kohno
{"title":"Channel modelling and performance evaluation of UWB-based wireless body area networks","authors":"K. Takizawa, T. Aoyagi, K. Hamaguchi, R. Kohno","doi":"10.1504/IJUWBCS.2012.051053","DOIUrl":"https://doi.org/10.1504/IJUWBCS.2012.051053","url":null,"abstract":"This paper provides channel models for wireless body area network (WBAN) in UWB frequency band, and also presents performance evaluation using the derived channel models. The channel model is given by a statistical model in which parameters are derived from actually measured channel transfer function in a hospital room environment. These models enable us to evaluate performance of UWB-based WBAN. In this paper, bit error ratio (BER) and packet error ratio (PER) are shown for UWB-based WBAN which employs a signalling scheme among OOK, BPPM, BPSK, and DPSK. The results show that both OOK and BPPM which generally uses a non-coherent receiver provide severe performance when the target PER is set to 10–2 under the packet size of 128 bytes. The other signalling schemes achieve the required performance from the viewpoint of such error ratio.","PeriodicalId":294875,"journal":{"name":"Int. J. Ultra Wideband Commun. Syst.","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116699803","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: 5
Application of IEEE 802.15.6 IR-UWB physical layer for medical BAN IEEE 802.15.6 IR-UWB物理层在医用BAN中的应用
Int. J. Ultra Wideband Commun. Syst. Pub Date : 2011-12-01 DOI: 10.1504/IJUWBCS.2011.044602
I. Dotlic, R. Kohno
{"title":"Application of IEEE 802.15.6 IR-UWB physical layer for medical BAN","authors":"I. Dotlic, R. Kohno","doi":"10.1504/IJUWBCS.2011.044602","DOIUrl":"https://doi.org/10.1504/IJUWBCS.2011.044602","url":null,"abstract":"In this paper, several aspects of IEEE 802.15.6 DPSK IR-UWB physical layer for usage in the medical BAN are examined. First, the types of the waveforms used in the standard are given. After that we describe the packet structure. We also provide mathematical analysis of two receiver structures: the duty-cycled sampling receiver and the chirp receiver is provided with suitable digital detection methods definitions and analysis. The paper continues with developing a method of synchronisation for preamble structure described in the standard draft together with the synchronisation frame delimiter (SFD) detection method. Preamble structure itself is discussed together with offering an alternative that has better performance with less computational complexity. The performances of receivers designed according to specifications given in the paper are simulated in multi-BAN environments in order to verify robustness of such BAN devices to interference from co-located BANs, essential for the application of this physical layer in the medical BAN.","PeriodicalId":294875,"journal":{"name":"Int. J. Ultra Wideband Commun. Syst.","volume":"317 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114743926","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: 1
Preliminary UWB channel study for wireless body area networks in medical applications 医用无线体域网UWB信道初步研究
Int. J. Ultra Wideband Commun. Syst. Pub Date : 2011-02-18 DOI: 10.1504/IJUWBCS.2011.038632
A. Taparugssanagorn, C. Pomalaza-ráez, A. Isola, R. Tesi, M. Hämäläinen, J. Iinatti
{"title":"Preliminary UWB channel study for wireless body area networks in medical applications","authors":"A. Taparugssanagorn, C. Pomalaza-ráez, A. Isola, R. Tesi, M. Hämäläinen, J. Iinatti","doi":"10.1504/IJUWBCS.2011.038632","DOIUrl":"https://doi.org/10.1504/IJUWBCS.2011.038632","url":null,"abstract":"Ultra wideband (UWB) communications is a promising technology for wireless body area networks (WBAN) due to its very low power emission and robustness against multipath fading characteristics. The use of WBANs in the areas of healthcare and telemedicine is being seriously considered as a way of increasing the quality of medical services and of keeping under control the associated costs. Because the human body has a complex shape and consists of different tissues it is expected that the propagation of electromagnetic signals will have different characteristics than the ones found in other environments, e.g., offices, streets, etc. The contribution of the work described in this paper is to expand the knowledge of the UWB channel, for WBAN applications, in the frequency range of 3-11 GHz under scenarios expected to be found in the medical care field. The experimental measurements are used to develop UWB channel models which can then be applied to the design of efficient communications protocols.","PeriodicalId":294875,"journal":{"name":"Int. J. Ultra Wideband Commun. Syst.","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114280621","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: 17
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