{"title":"On the validity domain of a hybrid FDTD/UTD method for indoor channel modeling","authors":"S. Reynaud, A. Reineix, R. Vauzelle, C. Guiffaut","doi":"10.1109/ECWT.2006.280442","DOIUrl":"https://doi.org/10.1109/ECWT.2006.280442","url":null,"abstract":"Classical theories such as the uniform theory of diffraction (UTD) use analytical expressions for diffraction coefficients. These methods are widely used in radio communications to predict the channel behaviour. Indeed, they are very fast and applicable as long as the objects which interact during the wave propagation are canonical (dihedral for example) and much greater than the wavelength. For more complex and smaller scattering structures, rigorous methods as the finite difference time domain method (FDTD) is more suited. In this paper, we present an original approach, combining the advantages of these two complementary methods, in order to accurately characterise the propagation channel","PeriodicalId":217349,"journal":{"name":"2006 European Conference on Wireless Technology","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114537460","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}
{"title":"A Reconfigurable Radio Architecture for Cognitive Radio in Emergency Networks","authors":"Q. Zhang, A. Kokkeler, G. Smit","doi":"10.1109/ECWT.2006.280428","DOIUrl":"https://doi.org/10.1109/ECWT.2006.280428","url":null,"abstract":"Cognitive radio has been proposed as a promising technology to solve today's spectrum scarcity problem. Cognitive radio is able to sense the spectrum to find the free spectrum, which can be optimally used by cognitive radio without causing interference to the licensed user. In the scope of the adaptive ad-hoc freeband (AAF) project, an emergency network built on top of cognitive radio is proposed. New functional requirements and system specifications for cognitive radio have to be supported by a reconfigurable architecture. In this paper, we propose a heterogenous reconfigurable system-on-chip (SoC) architecture to enable the evolution from the traditional software defined radio to cognitive radio","PeriodicalId":217349,"journal":{"name":"2006 European Conference on Wireless Technology","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124994207","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}
{"title":"On the Application of Multimode Diversity Reception using Miniaturized Wideband Log.-Per. Planar Antennas","authors":"O. Klemp, H. Eul","doi":"10.1109/ECWT.2006.280431","DOIUrl":"https://doi.org/10.1109/ECWT.2006.280431","url":null,"abstract":"Multimode antennas offering orthogonal operational modes can be applied at the mobile terminal in order to enhance signal reliability by diversity reception. Compared to conventional antenna techniques focusing on spatial diversity concepts, multimode antennas can be realized with reduced size requirements. In this paper a novel, multimode log.-per. planar antenna is presented that achieves the same diversity order as a spatial diversity configuration consisting of four antenna elements by providing dual-mode- and dual-linear polarized operation. With the advent of self-complementary geometries, the realized antenna covers a frequency range from 1 GHz to 6 GHz and is therefore well suited for multiradio applications","PeriodicalId":217349,"journal":{"name":"2006 European Conference on Wireless Technology","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116913966","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}
{"title":"Sigma-Delta ADC Clock Jitter in Digitally Implemented Receiver Architectures.","authors":"P. van Zeijl, R. van Veldhoven, Peter Nuijten","doi":"10.1109/ECWT.2006.280423","DOIUrl":"https://doi.org/10.1109/ECWT.2006.280423","url":null,"abstract":"The analog-to-digital (AD) converter in modern multi-band multi-mode software defined radios plays a very important role. This paper will show how the specifications for the clock of a sigma-delta AD-converters can be derived. In contrast to literature, where clock jitter (in psrms) is specified, a different approach will be taken, in which the frequency dependent spurious of the clock signal can be calculated in the case of a GSM receiver","PeriodicalId":217349,"journal":{"name":"2006 European Conference on Wireless Technology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115535984","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}
{"title":"Single-chip RF Front-end with T/R Switch on Standard Silicon Technology for 5-GHz WLANs","authors":"D. Zito, B. Neri","doi":"10.1109/ECWT.2006.280513","DOIUrl":"https://doi.org/10.1109/ECWT.2006.280513","url":null,"abstract":"A fully integrated RF front-end on standard silicon technology for 5-GHz indoor WLAN applications is presented. It includes an innovative T/R antenna switch which does not require any additional technological steps and provides better performance (the measured insertion losses are 0.2 and 0.9 dB, in R and T modes respectively) with respect to those obtained by using PIN diodes as switching elements","PeriodicalId":217349,"journal":{"name":"2006 European Conference on Wireless Technology","volume":"1081 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122894874","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}
{"title":"Transmitter Reconfigurable Platform for Software Radio","authors":"N. Dmitriev, A. Babkovsky, N. Seleznev","doi":"10.1109/ECWT.2006.280483","DOIUrl":"https://doi.org/10.1109/ECWT.2006.280483","url":null,"abstract":"Universal reconfigurable platform is proposed for organizing a transmitting path for communication, radiolocation, satellite, navigation and measuring equipment. The proposed universal transmitting platform may be used in various wireless devices into the hardware as well as in signal simulators for monitoring the said systems only due to introducing changes into the software of the controlling microcontroller","PeriodicalId":217349,"journal":{"name":"2006 European Conference on Wireless Technology","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124558655","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}
{"title":"Interleaving Distances Spectrum Comparison between Turbo-codes Interleavers","authors":"H. Balta, S. El Assad","doi":"10.1109/ECWT.2006.280459","DOIUrl":"https://doi.org/10.1109/ECWT.2006.280459","url":null,"abstract":"In this paper the interleaving distances spectrum (IDS) is defined. The IDSs for random, block and pseudorandom interleavers are established. The theoretical IDSs for the random and square block interleavers are calculated. On the basis of the IDS, some parameters like the minimum interleaving distance and the spreading degree are defined and calculated. These parameters allow us to make a comparison between different and also same type interleavers","PeriodicalId":217349,"journal":{"name":"2006 European Conference on Wireless Technology","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130603403","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}
{"title":"Comparison of circular, Uniform- and non Uniform Y-Shaped Array Antenna for DOA Estimation using Music Algorithm","authors":"M. Hajian, C. Coman, L. Ligthart","doi":"10.1109/ECWT.2006.280455","DOIUrl":"https://doi.org/10.1109/ECWT.2006.280455","url":null,"abstract":"For accurate estimation of AOA of multiple sources an antenna array can be used. In this paper a comparison between the directions finding capability of three array geometries circular array, uniform- and non-uniform Y-shaped array are presented. The center frequency is 2.25 GHz with a bandwidth of 100 MHz. The antenna element is the skirt monopole. The antenna array performance is severely affected by the mutual coupling (MC). The direction finding capabilities of the music algorithm for three arrays is then analyzed using the data with- and without MC. It is concluded that the circular array outperformed the other two array configurations. The performance of the circular array is then evaluated in noisy environment. A method to calibrate the algorithm for MC is presented. The performance of the algorithms is evaluated for different number of sources, and SNR","PeriodicalId":217349,"journal":{"name":"2006 European Conference on Wireless Technology","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123514914","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}
{"title":"Experimental Study of Radiated and Conducted UWB Interference and its Impact on the Throughput of 5-GHz WLAN Receivers","authors":"I. Haroun, S. Palaninathan, W. Lauber","doi":"10.1109/ECWT.2006.280445","DOIUrl":"https://doi.org/10.1109/ECWT.2006.280445","url":null,"abstract":"This paper discusses and reports the measured throughput of a 5-GHz WLAN receiver in the presence of ultra-wideband (UWB) interference signals. Two different experimental scenarios are considered: 1) conducted interference where the UWB signal was injected directly into the victim receiver, and 2) radiated interference where the UWB signal was radiated from an antenna in close proximity to the victim receiver. In each scenario, the performance of the victim receiver was evaluated by measuring the average throughput (average over sending a file 10 times). The measured throughput as a function of the signal-to-interference ratio SIR indicates that, a throughput of 7.8 Mbps can be achieved with SIR of 3.5 dB at the input of the receiver. However, this achieved throughput represents 50% performance degradation. The results also indicate that, having two UWB interference sources as close as 20 cm to the victim receiver could degrade the receiver performance significantly depending on the received signal level. A separation of at least 0.5 meter between the antennas of the victim and offending devices would satisfy the system requirement for throughput greater than 7 Mbps","PeriodicalId":217349,"journal":{"name":"2006 European Conference on Wireless Technology","volume":"15 9","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120920351","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}
{"title":"System and Circuit Models for Microwave Antennas","authors":"M. Sobhy, B. Sanz-Izquierdo, J. Batchelor","doi":"10.1109/ECWT.2006.280490","DOIUrl":"https://doi.org/10.1109/ECWT.2006.280490","url":null,"abstract":"Computer aided procedures have been developed to derive system and circuit models to match measured responses of the reflection coefficient of microwave antennas. System models are used to study the effect of the antenna on digital signals in digital communication systems. Circuit models are used as an aid to designing the antenna and relating the antenna performance to its physical structure","PeriodicalId":217349,"journal":{"name":"2006 European Conference on Wireless Technology","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121787919","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}