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2007 European Conference on Wireless Technologies最新文献

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A low phase noise integrated SiGe 18..20 GHz fractional-N synthesizer 低相位噪声集成SiGe 18..20GHz分数n合成器
2007 European Conference on Wireless Technologies Pub Date : 2007-12-26 DOI: 10.1109/EMICC.2007.4412699
R. Follmann, D. Kother, M. Engels, V. Heyer, K. Schmalz, F. Herzel, W. Winkler, S. Osmany, U. Jagdhold
{"title":"A low phase noise integrated SiGe 18..20 GHz fractional-N synthesizer","authors":"R. Follmann, D. Kother, M. Engels, V. Heyer, K. Schmalz, F. Herzel, W. Winkler, S. Osmany, U. Jagdhold","doi":"10.1109/EMICC.2007.4412699","DOIUrl":"https://doi.org/10.1109/EMICC.2007.4412699","url":null,"abstract":"The communication market demands broadband transmission, high density television (HDTV) and interactivity, whereby HDTV will become the leading application. All applications require a high number of individual channels, leading to a large number of up-and down-converters. These high needs can be served best with highly integrated SiGe MMICs. It has been demonstrated that the best suited RF-element to be developed is the Local Oscillator (LO) synthesizer, which fits well to the SiGe technology. The most critical building blocks of the LO are the voltage controlled oscillator (VCO) which is challenging in its phase noise behavior and the fractional-iN divider with its large influence on phase noise and spurs. This paper will describe the flexible design of a MMIC, which can be used also as a PLL circuit together with an external oscillator in a broad frequency range.","PeriodicalId":448587,"journal":{"name":"2007 European Conference on Wireless Technologies","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117066925","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
A 1.5-V 0.25-μm CMOS current-reuse up-converter for 3-5 GHz low-power WPANs 一种1.5 v 0.25 μm CMOS电流复用上变频器，用于3-5 GHz低功耗wpan
2007 European Conference on Wireless Technologies Pub Date : 2007-12-26 DOI: 10.1109/EMICC.2007.4412696
G. Sapone, G. Palmisano
{"title":"A 1.5-V 0.25-μm CMOS current-reuse up-converter for 3-5 GHz low-power WPANs","authors":"G. Sapone, G. Palmisano","doi":"10.1109/EMICC.2007.4412696","DOIUrl":"https://doi.org/10.1109/EMICC.2007.4412696","url":null,"abstract":"In this paper the measured performance of a 3-5 GHz low-power up-converter is presented. The circuit is based on a current-reuse topology with resistive load. It was implemented in a standard low-cost 0.25-μm CMOS technology. The up-converter achieves 3.8-dB of power gain, an output 1-dB compression point of -10.8 dBm, and a 8-dB single-sideband noise figure, while drawing only 2.3 mA from a 1.5-V supply voltage. An operating bandwidth of 1.5 GHz was measured. The reported comparison carried out with the state-of-the-art of wideband/low-power mixers demonstrates that excellent RF performance has been achieved. The proposed circuit is in accordance with the wideband/low-power requirements of 3-5 GHz ultra-wideband WPANs.","PeriodicalId":448587,"journal":{"name":"2007 European Conference on Wireless Technologies","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131093893","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
Characterization of UWB time reversal using circular array measurements 使用圆形阵列测量的超宽带时间反转特性
2007 European Conference on Wireless Technologies Pub Date : 2007-12-17 DOI: 10.1109/ECWT.2007.4403956
P. Pajusco, P. Pagani
{"title":"Characterization of UWB time reversal using circular array measurements","authors":"P. Pajusco, P. Pagani","doi":"10.1109/ECWT.2007.4403956","DOIUrl":"https://doi.org/10.1109/ECWT.2007.4403956","url":null,"abstract":"Time reversal is a promising technique for the improvement of future telecommunication systems. A better understanding of this capability requires more investigation on real channels. This paper presents a new scheme to characterize the space-time focusing characteristics of time reversal. An extensive UWB propagation experiment is reported. The method is applied to the experimental data. Different focusing parameters are computed in different configurations. In UWB SISO configuration, time reversal increases the power of the strongest path by up to 10 dB. The channel is focused in time but the delay spread parameter remains unchanged. The average size of the spot is about 3 lambda which is larger than the ideal case. The focusing spot is often directed inline with the transmitter. At 9 lambda far from the target, the received signal is reduced by up to 10 dB in NLOS.","PeriodicalId":448587,"journal":{"name":"2007 European Conference on Wireless Technologies","volume":"29 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":"122657509","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
A Novel Low Reflection-Loss MEMS Reconfigurable Patch Antenna 一种新型低反射损耗MEMS可重构贴片天线
2007 European Conference on Wireless Technologies Pub Date : 2007-12-17 DOI: 10.1109/EUMC.2007.4405368
P. Arcioni, L. Perregrini, G. Conciauro
{"title":"A Novel Low Reflection-Loss MEMS Reconfigurable Patch Antenna","authors":"P. Arcioni, L. Perregrini, G. Conciauro","doi":"10.1109/EUMC.2007.4405368","DOIUrl":"https://doi.org/10.1109/EUMC.2007.4405368","url":null,"abstract":"This paper discusses the design of a novel reconfigurable patch antenna loaded by RF Micro Electro-Mechanical Systems (MEMS) switches. Thanks to the particular disposition of the switches, the antenna maintains a very good matching, independently of the MEMS up/down states. The continuous coverage of a 1.5 GHz band centered around 20 GHz is obtained, using only five different combinations of the MEMS states, which give rise to five contiguous operating bands. The optimization of the patch layout relies on a fast and accurate new design technique, which avoids repeated time-consuming 3-D full-wave electromagnetic analyses.","PeriodicalId":448587,"journal":{"name":"2007 European Conference on Wireless Technologies","volume":"38 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":"123814902","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
Multi-stage Pulse Shrinking Time-to-Digital Converter for Time Interval Measurements 用于时间间隔测量的多级脉冲收缩时间-数字转换器
2007 European Conference on Wireless Technologies Pub Date : 2007-12-17 DOI: 10.1109/ECWT.2007.4404018
Yue Liu, U. Vollenbruch, Yangjian Chen, C. Wicpalek, Linus Maurer, Z. Boos, Robert Weigel
{"title":"Multi-stage Pulse Shrinking Time-to-Digital Converter for Time Interval Measurements","authors":"Yue Liu, U. Vollenbruch, Yangjian Chen, C. Wicpalek, Linus Maurer, Z. Boos, Robert Weigel","doi":"10.1109/ECWT.2007.4404018","DOIUrl":"https://doi.org/10.1109/ECWT.2007.4404018","url":null,"abstract":"This paper presents a new structure of Pulse Shrinking Time-to-Digital Converter (TDC) with 20 ps resolution which is implemented in Infineon 0.13 mum CMOS technology. The new interpolating multi-stage TDC with feedback loop and high speed counter accelerates the digitization of the input time interval and is appropriate as Phase Detector for Phase Locked Loop application. The interpolated multi-stage structure efficiently saves the chip area and power consumption. Its Full-Scale-Range (FSR) is about 5000 ps and its differential linearity errors are less than 0.52 LSB.","PeriodicalId":448587,"journal":{"name":"2007 European Conference on Wireless Technologies","volume":"77 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":"126312136","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: 29
Chipless Radio Frequency Identification by Remote Measurement of Complex Impedance 基于复杂阻抗远程测量的无芯片射频识别
2007 European Conference on Wireless Technologies Pub Date : 2007-12-17 DOI: 10.1109/ECWT.2007.4403993
S. Mukherjee
{"title":"Chipless Radio Frequency Identification by Remote Measurement of Complex Impedance","authors":"S. Mukherjee","doi":"10.1109/ECWT.2007.4403993","DOIUrl":"https://doi.org/10.1109/ECWT.2007.4403993","url":null,"abstract":"A novel technique for radio frequency identification devices (RFID) based on remote measurement of complex impedance at microwave frequencies is presented. The low cost read-only tags do not need semiconductor elements and can be implemented by printing a conducting pattern on a low cost dielectric substrate. Multiple tags are simultaneously illuminated by a chirped microwave signal with a bandwidth of few hundred MHz to few GHz. The composite backscatter from all tags is mixed with the transmitted chirp signal and filtered to generate an intermediate frequency (IF). The IF is further processed with a narrow detection bandwidth to select a particular tag. Next, the phase-frequency profile of the reflection coefficient (complex impedance) of the selected tag is recovered with the help of a reference channel. Phase-frequency signatures of individual tags determine the tag identity. The technique allows operation with low transmit power, provides range information and mitigates against multi-path propagation and interference.","PeriodicalId":448587,"journal":{"name":"2007 European Conference on Wireless Technologies","volume":"44 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":"131566914","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
Symbol Data Organization in a WB-CDMA Modem WB-CDMA调制解调器中的符号数据组织
2007 European Conference on Wireless Technologies Pub Date : 2007-12-17 DOI: 10.1109/ECWT.2007.4403933
W. Hein, J. Berkmann, M. Zimmermann, M. Huemer
{"title":"Symbol Data Organization in a WB-CDMA Modem","authors":"W. Hein, J. Berkmann, M. Zimmermann, M. Huemer","doi":"10.1109/ECWT.2007.4403933","DOIUrl":"https://doi.org/10.1109/ECWT.2007.4403933","url":null,"abstract":"For a System-on-Chip (SoC) implementation of mass market devices like a wireless modem user equipment it is crucial -in addition to fulfilling the standardized functional requirements -to optimize both silicon die size and power dissipation. In current VLSI technologies at 65 nm and beneath, beside an optimized logic implementation, a careful dimensioning of all memories is a must. This applies especially to those synchronous random access memories (SRAM) which have to be built on-die because the data throughput is inevitable high like in the signal processing part of a modem's physical layer. This paper presents as an example for the receive path of a WB-CDMA modem a solution for a low power data organization of the frame-wise buffered symbol-streams in between demodulators and channel decoder. This solution is self-adapting in real time to the permanent changing data rates and volume respectively.","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":"133314251","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
Impact of Sievenpiper High Impedance Surfaces on the Performance of Planar Cross-Dipole Polarization Diversity Antennas Sievenpiper高阻抗表面对平面交叉偶极极化分集天线性能的影响
2007 European Conference on Wireless Technologies Pub Date : 2007-12-17 DOI: 10.1109/ECWT.2007.4403960
O. Schmitz, S. Hampel, I. Rolfes, H. Eul
{"title":"Impact of Sievenpiper High Impedance Surfaces on the Performance of Planar Cross-Dipole Polarization Diversity Antennas","authors":"O. Schmitz, S. Hampel, I. Rolfes, H. Eul","doi":"10.1109/ECWT.2007.4403960","DOIUrl":"https://doi.org/10.1109/ECWT.2007.4403960","url":null,"abstract":"This paper examines the influence of so called Sievenpiper High Impedance Surfaces (HIS) on the diversity performance of planar dual linear-polarized cross-dipole antennas in the ISM-band at 5.5 GHz. Starting from uncoupled free-space considerations we investigate characteristic performance criteria such as Mean Effective Gain (MEG), power imbalance, spatial correlation and diversity gain of different antenna configurations by means of full-wave electromagnetic analysis. Diversity analysis is performed via Monte-Carlo simulations applying statistical channel models. The obtained results show that the application of Sievenpiper High Impedance Surfaces to planar diversity antennas enables equivalent diversity performance when compared to configurations with plain ground metalizations at the same time reducing the overall-height substantially.","PeriodicalId":448587,"journal":{"name":"2007 European Conference on Wireless Technologies","volume":"152 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":"124518334","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
An OFDM MIMO Transmitter for Wireless Gigabit with Advanced Multimedia (WIGWAM) 无线千兆位先进多媒体(WIGWAM) OFDM MIMO发射机
2007 European Conference on Wireless Technologies Pub Date : 2007-12-17 DOI: 10.1109/ECWT.2007.4403964
M. Simon, S. Winter, U. Klepser, R. Weigel
{"title":"An OFDM MIMO Transmitter for Wireless Gigabit with Advanced Multimedia (WIGWAM)","authors":"M. Simon, S. Winter, U. Klepser, R. Weigel","doi":"10.1109/ECWT.2007.4403964","DOIUrl":"https://doi.org/10.1109/ECWT.2007.4403964","url":null,"abstract":"A fully integrated high linearity low power and low cost transmitter in 120 nm CMOS technology with 2 RF-paths and integrated balun for broadband OFDM MIMO application is presented. The transmitter is used for the Wireless Gigabit with Advanced Multimedia (WIGWAM) research project. A maximum datarate of 970 Mbit/s can be achieved by transmitting a 256QAM OFDM MIMO signal with 80 MHz bandwidth and 7/8 code rate. The Error Vector Magnitude is only -28 dB due to low phase noise and high linearity. The RF coupling between the 2 MIMO TX paths is 32 dB. The carrier and sideband of the vector modulator are calibrated with an integrated down-conversion mixer.","PeriodicalId":448587,"journal":{"name":"2007 European Conference on Wireless Technologies","volume":"63 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":"117248342","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
Study and integration of a wideband antenna working in the millimeter-wave band (D-band) 一种工作在毫米波(d)波段的宽带天线的研究与集成
2007 European Conference on Wireless Technologies Pub Date : 2007-12-17 DOI: 10.1109/ECWT.2007.4403943
N. Vannod, C. Algani, F. Deshours, G. Alquié
{"title":"Study and integration of a wideband antenna working in the millimeter-wave band (D-band)","authors":"N. Vannod, C. Algani, F. Deshours, G. Alquié","doi":"10.1109/ECWT.2007.4403943","DOIUrl":"https://doi.org/10.1109/ECWT.2007.4403943","url":null,"abstract":"This paper presents the simulation and experimental investigation of a wideband square slot antenna, the theoretical behavior and the origin of the second resonance in the bandwidth of this antenna is approached. The measurement of the first antenna, working in the UWB band shows a bandwidth of 48% as in electromagnetic simulations. Introducing this kind of antenna in the millimeter-wave domain could be the good choice for both a low cost fabrication and an easier integration to an active circuit. Electromagnetic simulations are under progress to design and to integrate such an antenna to an active MMIC circuit using bonding-wire technique inside a metallic box, in the D-band (110-190GHz).","PeriodicalId":448587,"journal":{"name":"2007 European Conference on Wireless Technologies","volume":"105 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":"121917040","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
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