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2007 European Conference on Wireless Technologies最新文献

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Analysis of Flicker Noise in a Multimode Radio for Cellular and Connectivity Applications 用于蜂窝和连接应用的多模无线电中的闪烁噪声分析
2007 European Conference on Wireless Technologies Pub Date : 2007-12-17 DOI: 10.1109/ECWT.2007.4403976
A.D. Savers, M. Jaloux
{"title":"Analysis of Flicker Noise in a Multimode Radio for Cellular and Connectivity Applications","authors":"A.D. Savers, M. Jaloux","doi":"10.1109/ECWT.2007.4403976","DOIUrl":"https://doi.org/10.1109/ECWT.2007.4403976","url":null,"abstract":"This paper describes work on a multi-mode radio receiver intended to facilitate the convergence of cellular and connectivity applications. The radio has been designed to be capable of a large number of radio modes including GSM, EDGE, UMTS and 802.11 standards. The radio consists of an RF CMOS front-end, a sigma-delta ADC and CMOS decimation circuits. A system simulator has been implemented, in order to verify the radio receiver performance in all modes. The simulation of flicker (1/f) noise is particularly important for RF CMOS front-ends. This paper analyses the effect of Flicker noise on the radio receiver, and presents the results of simulations of radio performance obtained.","PeriodicalId":448587,"journal":{"name":"2007 European Conference on Wireless Technologies","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127980669","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: 3
Review of Frequency Selectivity Parameters for Broadband Signals 宽带信号的频率选择性参数研究进展
2007 European Conference on Wireless Technologies Pub Date : 2007-12-17 DOI: 10.1109/ECWT.2007.4403974
V. Hinostroza, H. Garces, G. Flores
{"title":"Review of Frequency Selectivity Parameters for Broadband Signals","authors":"V. Hinostroza, H. Garces, G. Flores","doi":"10.1109/ECWT.2007.4403974","DOIUrl":"https://doi.org/10.1109/ECWT.2007.4403974","url":null,"abstract":"This work is about the effect of frequency selectivity on multi-carrier wideband signals in two different environments; indoors and outdoor to indoor. The investigation was made using measurements carried out with a sounder with a 300 MHz bandwidth. The main part of this work is to evaluate the contribution of several related parameters; frequency selective fading, coherence bandwidth and delay spread on the frequency selectivity of the channel. A description of the sounder parameters and the sounded environments are given. The 300 MHz bandwidth is divided in segments as small as 60 kHz to perform the evaluation of frequency selective fading. Sub channels of 20 MHz for OFDM systems and 5 MHz for WCDMA were evaluated. Graphics are provided for a number of bands, parameters and locations in the different environments. It is also shown the variation of the signal level due to frequency selective fading. The practical assumptions about the coherence bandwidth and delay spread are reviewed and a comparison is made with actual measurements. Statistical analysis was performed over some of the results.","PeriodicalId":448587,"journal":{"name":"2007 European Conference on Wireless Technologies","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122388351","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
Analysis and Estimation of Line-of-Sight Coverage in Urban Areas for Fixed Broadband Wireless Access Systems 城市固定宽带无线接入系统视距覆盖分析与估计
2007 European Conference on Wireless Technologies Pub Date : 2007-12-17 DOI: 10.1109/ECWT.2007.4403988
G. Bauer, R. Jakoby
{"title":"Analysis and Estimation of Line-of-Sight Coverage in Urban Areas for Fixed Broadband Wireless Access Systems","authors":"G. Bauer, R. Jakoby","doi":"10.1109/ECWT.2007.4403988","DOIUrl":"https://doi.org/10.1109/ECWT.2007.4403988","url":null,"abstract":"Line-of-sight (LOS) is often required in fixed broadband wireless access systems like LMDS or WiMAX. However, the percentage of customers in a cell which can be reached via a LOS link depends strongly on the environment and other scenario parameters. In this article the influence of these parameters on an introduced average LOS coverage ratio is analyzed using ray tracing calculations and approximately described by simple expressions. This makes it possible to rate, to compare and even to transfer coverage results to other scenarios, which allows a rough but easy estimation of the average LOS coverage for an arbitrary scenario based on a reference scenario.","PeriodicalId":448587,"journal":{"name":"2007 European Conference on Wireless Technologies","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122331721","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: 3
Performance Analysis of FMCW Synchronization Techniques for Indoor Radiolocation 室内无线定位FMCW同步技术性能分析
2007 European Conference on Wireless Technologies Pub Date : 2007-12-17 DOI: 10.1109/ECWT.2007.4403936
R. Gierlich, J. Huttner, A. Dabek, M. Huemer
{"title":"Performance Analysis of FMCW Synchronization Techniques for Indoor Radiolocation","authors":"R. Gierlich, J. Huttner, A. Dabek, M. Huemer","doi":"10.1109/ECWT.2007.4403936","DOIUrl":"https://doi.org/10.1109/ECWT.2007.4403936","url":null,"abstract":"A high precision localization system (HPLS) operating in the 5.8 GHz ISM band is presented. The system principle is based on the sequential exchange of frequency modulated continuous wave (FMCW) signals between identical radar stations. The round-trip time-of-flight (RToF) localization method requires exact synchronization of all involved stations. Consequently, accurate compensation of clock frequency drift is indispensible. We analyze the impact of clock deviation on synchronization accuracy and present a precise compensation method. The synchronization technique has been tested on a prototype system. Measurements showed a 3D-position accuracy of 2.8 cm under laboratory conditions.","PeriodicalId":448587,"journal":{"name":"2007 European Conference on Wireless Technologies","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129309925","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: 22
Highly Integrated Ligthweight Dual Band Antenna with Dual or Quadruple Polarization Agility 高度集成的轻型双波段天线，具有双或四倍极化灵活性
2007 European Conference on Wireless Technologies Pub Date : 2007-12-17 DOI: 10.1109/ECWT.2007.4403959
G. Jaworski, M. Hornik, P. Gorski, T. Maleszka, D. Wydymus, P. Kabacik
{"title":"Highly Integrated Ligthweight Dual Band Antenna with Dual or Quadruple Polarization Agility","authors":"G. Jaworski, M. Hornik, P. Gorski, T. Maleszka, D. Wydymus, P. Kabacik","doi":"10.1109/ECWT.2007.4403959","DOIUrl":"https://doi.org/10.1109/ECWT.2007.4403959","url":null,"abstract":"Wireless and mobile communication often calls for dual-band antenna modules. Presently, agility in polarization properties in such antennas is getting on a sense of urgency. The antennas desired by the industry should be manufactured in the lightweight technology supporting high degree of integration between antenna elements and microwave feeding circuits. The well suited approach is use of multilayer composite panels carrying at the bottom side microwave printed circuits needed to generate at least two polarizations. This paper presents the results of our research on dual-band antenna modules with an integrated compact microwave feeding network.","PeriodicalId":448587,"journal":{"name":"2007 European Conference on Wireless Technologies","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124505611","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
Design of a [DC - 20 GHz] Buffered Track and Hold Circuit in InP DHBT Technology InP DHBT技术中[DC - 20ghz]缓冲跟踪保持电路的设计
2007 European Conference on Wireless Technologies Pub Date : 2007-12-17 DOI: 10.1109/EMICC.2007.4412698
H. El Aabbaoui, B. Gorisse, N. Rolland, A. Benlarbi-Delai, N. Fel, V. Allouche, P. Leclerc, B. Riondet, P. Rolland
{"title":"Design of a [DC - 20 GHz] Buffered Track and Hold Circuit in InP DHBT Technology","authors":"H. El Aabbaoui, B. Gorisse, N. Rolland, A. Benlarbi-Delai, N. Fel, V. Allouche, P. Leclerc, B. Riondet, P. Rolland","doi":"10.1109/EMICC.2007.4412698","DOIUrl":"https://doi.org/10.1109/EMICC.2007.4412698","url":null,"abstract":"This paper describes the design and realization of a buffered track and hold (BTH) circuit fabricated in InP-InGaAs-InP double heterojunction bipolar transistor (DHBT) technology (FT = 180 GHz). This BTH is intended for a single shot, 20 GHz bandwidth and 40 GS/s sampling frequency digitizer based on the non simultaneous spatial sampling principle. Based on a high speed switched emitter follower (SEF), the BTH can ensure 20 GHz bandwidth signal compatible with the targeted objectives. First experimental results in the frequency domain and a novel optimized architecture leading to a combination between the SEF and the Cherry Hooper design based buffer are also presented.","PeriodicalId":448587,"journal":{"name":"2007 European Conference on Wireless Technologies","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131015894","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
UMTS WCDMA Network Planning with Smart Antennas 基于智能天线的UMTS WCDMA网络规划
2007 European Conference on Wireless Technologies Pub Date : 2007-12-17 DOI: 10.1109/ECWT.2007.4403953
D. Tsilimantos, G. Tsoulos, D. Kaklamani
{"title":"UMTS WCDMA Network Planning with Smart Antennas","authors":"D. Tsilimantos, G. Tsoulos, D. Kaklamani","doi":"10.1109/ECWT.2007.4403953","DOIUrl":"https://doi.org/10.1109/ECWT.2007.4403953","url":null,"abstract":"The issue of UMTS WCDMA radio network planning with smart antennas is presented in this paper. First the complexity of 3G network planning is discussed in the context of 2G and smart antennas. Then the impact that smart antennas can have on key WCDMA network parameters, such as capacity and coverage probability is demonstrated with the help of a radio network planning tool. Results from a typical urban operational scenario show that a limited deployment of smart antennas can help significantly the performance of the overall network. Nevertheless, it is also shown that careful planning is required in order to reach an improved network solution.","PeriodicalId":448587,"journal":{"name":"2007 European Conference on Wireless Technologies","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134609372","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: 4
Euclidean Distances in Quantized Spaces with Pre-stored Components for MIMO Detection 具有预存储分量的量化空间欧几里得距离用于MIMO检测
2007 European Conference on Wireless Technologies Pub Date : 2007-12-17 DOI: 10.1109/ECWT.2007.4403968
F. A. Monteiro, I. Wassell
{"title":"Euclidean Distances in Quantized Spaces with Pre-stored Components for MIMO Detection","authors":"F. A. Monteiro, I. Wassell","doi":"10.1109/ECWT.2007.4403968","DOIUrl":"https://doi.org/10.1109/ECWT.2007.4403968","url":null,"abstract":"This paper proposes a technique to reduce the complexity involved in the maximum likelihood detection of multiple input multiple output (MIMO) spatial multiplexing systems. Both the received lattice and the components of the received signal are quantized, corresponding to a mapping into a multidimensional space divided into hypercubes. In the new space the maximum likelihood detection criterion can be applied making use of a small look-up table storing all the exact possible distance components in each dimension of the quantized space. The number of pre-stored elements can be as small as the number of quantization levels per dimension. This procedure eliminates the multiplications involved in the calculation of the squared Euclidean distances. The impact of the quantization error is assessed by means of simulations over fast flat fading channels. Near optimum performance is achieved with only 5 bits representing each dimension of the received signal.","PeriodicalId":448587,"journal":{"name":"2007 European Conference on Wireless Technologies","volume":"481 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116528948","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: 4
Enhanced Feeds in Focal Plane Imaging Array Systems: Off Focus Configurations 焦平面成像阵列系统中的增强馈源:离焦配置
2007 European Conference on Wireless Technologies Pub Date : 2007-12-17 DOI: 10.1109/EUMC.2007.4405367
M. Bonnedal, N. Llombart, A. Neto, G. Gerini, P. D. de Maagt
{"title":"Enhanced Feeds in Focal Plane Imaging Array Systems: Off Focus Configurations","authors":"M. Bonnedal, N. Llombart, A. Neto, G. Gerini, P. D. de Maagt","doi":"10.1109/EUMC.2007.4405367","DOIUrl":"https://doi.org/10.1109/EUMC.2007.4405367","url":null,"abstract":"The performances of focal plane arrays that implement multi-beam coverage from a single reflector antenna are usually reduced by conflicting requirements on the feed elements. Dense packing is required to minimize the beam separation, while typically large apertures provide the high feed directivity which in turn translates in low spill over losses from the reflector. In this paper the use of a dielectric super-layer is proposed to shape the radiation pattern of each feed so that the spill over from the reflector is reduced without increasing the dimensions of each aperture. A prototype with 19 wave-guides arranged in a hexagonal lattice has been designed. The simulated embedded patterns provide an increase of the edge of coverage gain, with respect to the free space case, of at least 1 dB in an operating bandwidth of ap 6%. Moreover when a frequency and polarization reuse scheme is adopted the increase in the edge of coverage is 2.1 dB leading to a fully efficient use of the reflector.","PeriodicalId":448587,"journal":{"name":"2007 European Conference on Wireless Technologies","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123400147","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
A Fully Integrated and High Linearity UWB LNA Implemented with Current-Reused Technique and Using Single-Biasing Voltage 采用电流复用技术和单偏置电压实现的全集成、高线性度超宽带LNA
2007 European Conference on Wireless Technologies Pub Date : 2007-12-17 DOI: 10.1109/ECWT.2007.4403954
Chin-Lung Yang, Wei-Lin Hsieh, Y. Chiang
{"title":"A Fully Integrated and High Linearity UWB LNA Implemented with Current-Reused Technique and Using Single-Biasing Voltage","authors":"Chin-Lung Yang, Wei-Lin Hsieh, Y. Chiang","doi":"10.1109/ECWT.2007.4403954","DOIUrl":"https://doi.org/10.1109/ECWT.2007.4403954","url":null,"abstract":"A fully integrated ultra-wideband (UWB) low-noise amplifier (LNA) operating in the 7.2-9.1 GHz frequency range is presented. The LNA is constructed in self-biased and current-reused configuration to eliminate the external supply voltage applied in gate to decrease the complexity of bias circuitry. A shunt-shunt feedback network is not only used to archive self-biased architecture and neutralize the miller effect, but also increase the linearity and bandwidth of the amplifier. A prototype was designed and fabricated in a TSMC 0.18-mum technology to demonstrate the proposed LNA circuit. The measurements of the prototype show the performances in the design band about 10 dB power gain, 3.9 dB noise figure, 2-dBm input-referred third-order intercept point (IIP3) and drawing 9 mA from a 1.8 V power supply.","PeriodicalId":448587,"journal":{"name":"2007 European Conference on Wireless Technologies","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130675764","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: 14
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