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2007 European Conference on Wireless Technologies最新文献

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A Low Noise Amplifier for an Ultra Wideband Receiver 一种用于超宽带接收机的低噪声放大器
2007 European Conference on Wireless Technologies Pub Date : 2007-12-17 DOI: 10.1109/ECWT.2007.4403977
T. Waliwander, J. Barrett
{"title":"A Low Noise Amplifier for an Ultra Wideband Receiver","authors":"T. Waliwander, J. Barrett","doi":"10.1109/ECWT.2007.4403977","DOIUrl":"https://doi.org/10.1109/ECWT.2007.4403977","url":null,"abstract":"This paper presents the design and performance of the Low Noise Amplifier for a UWB Receiver. The amplifier utilizes commercially available components using a balanced microstrip structure. It provides an overall gain around 10 dB over the entire UWB band (3.1-10.6 GHz). The input and the output reflection coefficients are better than -13 and -20 dB, respectively. The noise figure of the amplifier is 3 dB over the frequency band.","PeriodicalId":448587,"journal":{"name":"2007 European Conference on Wireless Technologies","volume":"40 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":"125270507","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
Broadband Low Noise Amplifier with High Linearity for Software-Defined Radios 用于软件无线电的高线性度宽带低噪声放大器
2007 European Conference on Wireless Technologies Pub Date : 2007-12-17 DOI: 10.1109/ECWT.2007.4404012
M. Kawashima, Y. Yamaguchi, K. Nishikawa, K. Uehara
{"title":"Broadband Low Noise Amplifier with High Linearity for Software-Defined Radios","authors":"M. Kawashima, Y. Yamaguchi, K. Nishikawa, K. Uehara","doi":"10.1109/ECWT.2007.4404012","DOIUrl":"https://doi.org/10.1109/ECWT.2007.4404012","url":null,"abstract":"We propose a broadband low noise amplifier with high linearity performance. The amplifier achieves broadband, low noise performance and high linearity using a bias circuit with high impedance. The bias circuit consists of an inductor, a resistor, and a current source. The circuit obtains high impedance using a high resistive component. From 0.8 to 5 GHz, the low noise amplifier shows an S21 of 20plusmn1 dB and an Sll of less than -9 dB. The noise figure is 1.5-2.7 dB for frequencies from 0.5 to 5 GHz. The output 1-dB compression point at 2 GHz is +6.3 dBm.","PeriodicalId":448587,"journal":{"name":"2007 European Conference on Wireless Technologies","volume":"14 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":"130777855","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: 11
Adaptive time mismatches identification and correction in polar transmitter architecture 极性发射机结构中的自适应时错配识别与校正
2007 European Conference on Wireless Technologies Pub Date : 2007-12-17 DOI: 10.1109/ECWT.2007.4403950
J. Bercher, C. Berland
{"title":"Adaptive time mismatches identification and correction in polar transmitter architecture","authors":"J. Bercher, C. Berland","doi":"10.1109/ECWT.2007.4403950","DOIUrl":"https://doi.org/10.1109/ECWT.2007.4403950","url":null,"abstract":"This paper deals with synchronization in EER type of transmitter architecture, illustrated in the context of 3GPP standard. Firstly, we point out the sensitivity of such architecture to delay mismatch between the two signals path. This sensitivity can be observed on EVM and output spectrum performances. To correct this default, two algorithms are studied. Both are based on the comparison between the emitted signal and the digitally generated one but with the difference that the first algorithm needs I/Q demodulation whereas the second one only needs the in-phase component of the transmitted signal. We demonstrate that the quality of the interpolator used is crucial. Implementation details are given. We present simulation results realised with HPADS and draw attention to the enhancement of the transmitter performances using such algorithm.","PeriodicalId":448587,"journal":{"name":"2007 European Conference on Wireless Technologies","volume":"68 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":"128101303","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
Coexistence Method to Mitigate Interference from IMT-Advanced to Fixed Satellite Service 抑制IMT-Advanced对固定卫星业务干扰的共存方法
2007 European Conference on Wireless Technologies Pub Date : 2007-12-17 DOI: 10.1109/ECWT.2007.4403970
Han-Shin Jo, H. Yoon, Jae-Woo Lim, Youn-Hyun Park, J. Yook
{"title":"Coexistence Method to Mitigate Interference from IMT-Advanced to Fixed Satellite Service","authors":"Han-Shin Jo, H. Yoon, Jae-Woo Lim, Youn-Hyun Park, J. Yook","doi":"10.1109/ECWT.2007.4403970","DOIUrl":"https://doi.org/10.1109/ECWT.2007.4403970","url":null,"abstract":"In this paper, we propose an efficient and robust interference mitigation technique based on a nullsteering multiuser multiple-input multiple-output (MU-MIMO) spatial division multiple access (SDMA) scheme for frequency sharing between IMT-Advanced and fixed satellite service (FSS). In the proposed technique, the conventional precoding matrix for SDMA unitary preceded (UPC) MIMO proposed by the authors is modified to construct nulls in the spatial spectrum corresponding to the direction angles of the victim FSS earth station (ES). The frequency sharing results are given in terms of interference power and minimum separation distance in the co-channel. Simulation results shows that our mitigation technique reduces interfering power by about 60 dB and can meet the maximum permissible interference power condition in almost separation distances. Therefore it can be concluded that the proposed mitigation technique in this paper is highly efficient in terms of reducing the separation distance as well as robust against DOE estimation errors.","PeriodicalId":448587,"journal":{"name":"2007 European Conference on Wireless Technologies","volume":"11 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":"126359192","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
Innovative Dielectric Resonator Conformal Antenna for Wi-Fi Applications 创新的介电谐振共形天线用于Wi-Fi应用
2007 European Conference on Wireless Technologies Pub Date : 2007-12-17 DOI: 10.1109/ECWT.2007.4403958
F. Ricci, V. Boffa, S. Germani, S. Passi, B. Piovano, R. Vallauri
{"title":"Innovative Dielectric Resonator Conformal Antenna for Wi-Fi Applications","authors":"F. Ricci, V. Boffa, S. Germani, S. Passi, B. Piovano, R. Vallauri","doi":"10.1109/ECWT.2007.4403958","DOIUrl":"https://doi.org/10.1109/ECWT.2007.4403958","url":null,"abstract":"This paper describes the design of an innovative dielectric resonator conformal antenna for Wi-Fi access gateways. The conformal antennas are made of an advanced RF high performance-low loss polymeric composite material that provides better mechanical robustness compared to conventional ceramic materials. This work aims mainly to demonstrate the possibility of designing antennas based on low cost, high performance materials, which can be produced with standard compounding and moulding technologies, thus introducing a new class of conformal antennas incorporated into electronic equipment housings.","PeriodicalId":448587,"journal":{"name":"2007 European Conference on Wireless Technologies","volume":"39 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":"121380199","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
System Architectures in Multi-Mode Mobile Terminals 多模移动终端的系统架构
2007 European Conference on Wireless Technologies Pub Date : 2007-12-17 DOI: 10.1109/ECWT.2007.4403934
D. Wenzel
{"title":"System Architectures in Multi-Mode Mobile Terminals","authors":"D. Wenzel","doi":"10.1109/ECWT.2007.4403934","DOIUrl":"https://doi.org/10.1109/ECWT.2007.4403934","url":null,"abstract":"This paper focuses on the architecture partitioning for baseband ICs and RF transceivers in multi-mode and multi-band 3.5 G mobile terminals and gives an overview on the various influences and boundary conditions affecting the system architectures in today's solutions. The different and partly contradicting aspects which have to be considered for architectural decisions are explained, resulting questions are summarized and solutions are illustrated with examples. Furthermore, the evolution of multi-mode architectures is shown from the past up to actual implementations and an outlook on future trends is also given. The actual partitioning strategy between baseband and RF transceiver is explained in detail and the status of the interface definition and standardization is presented.","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":"128608003","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
Noise Reduction for SC/FDE Systems by Pre- and Post Processing 通过前后处理降低SC/FDE系统的噪声
2007 European Conference on Wireless Technologies Pub Date : 2007-12-17 DOI: 10.1109/ECWT.2007.4403937
H. Witschnig, M. Petit, A. Springer, M. Huemer
{"title":"Noise Reduction for SC/FDE Systems by Pre- and Post Processing","authors":"H. Witschnig, M. Petit, A. Springer, M. Huemer","doi":"10.1109/ECWT.2007.4403937","DOIUrl":"https://doi.org/10.1109/ECWT.2007.4403937","url":null,"abstract":"Noise represents a major performance limiting factor for wireless communication systems. Pre-and post processing of the transmitted information enables to reduce the influence of noise significantly, leading to a severe performance gain. We apply the derivation of an optimal pre-and post processing to a single carrier system with frequency domain equalization (SC/FDE). Comparisons between the standard SC/FDE system with a zero-forcing equalizer and the enhanced system show a performance gain of up to 8 dB at a bit error rate of 10-5.","PeriodicalId":448587,"journal":{"name":"2007 European Conference on Wireless Technologies","volume":"39 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":"116303470","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
Wirelessly-Powered Wireless Sensor Platform 无线供电无线传感器平台
2007 European Conference on Wireless Technologies Pub Date : 2007-12-17 DOI: 10.1109/EUMC.2007.4405364
T. Paing, J. Morroni, A. Dolgov, J. Shin, J. Brannan, R. Zane, Z. Popovic
{"title":"Wirelessly-Powered Wireless Sensor Platform","authors":"T. Paing, J. Morroni, A. Dolgov, J. Shin, J. Brannan, R. Zane, Z. Popovic","doi":"10.1109/EUMC.2007.4405364","DOIUrl":"https://doi.org/10.1109/EUMC.2007.4405364","url":null,"abstract":"This paper presents a low-power (~10 muW) 2.45-GHz wireless sensor platform consisting of a three-axis accelerometer, thermometer and skin conductivity sensor. The sensor is powered wirelessly from a distance of around 3-4 m with narrowband 2.45-GHz dual-polarized low power density radiation of around 100 muW/cm2. Efficient power management enables the powering function to be independent of the wireless transmission and sensor data gathering. The sensor platform does not require battery replacements, and is intended for low-maintenance assistive technology, elder-care and medical applications.","PeriodicalId":448587,"journal":{"name":"2007 European Conference on Wireless Technologies","volume":"4 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":"115540824","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: 66
Diversity-Multiplexing Tradeoff in MIMO System with Finite SNR 有限信噪比MIMO系统中的分集-复用权衡
2007 European Conference on Wireless Technologies Pub Date : 2007-12-17 DOI: 10.1109/ECWT.2007.4403967
H. Ebrahimzad, Abbas Mohammadi
{"title":"Diversity-Multiplexing Tradeoff in MIMO System with Finite SNR","authors":"H. Ebrahimzad, Abbas Mohammadi","doi":"10.1109/ECWT.2007.4403967","DOIUrl":"https://doi.org/10.1109/ECWT.2007.4403967","url":null,"abstract":"In this paper, the diversity-multiplexing tradeoff (DMT) for a multiple-input multiple-output (MIMO) channel with two transmitter and two receiver antennas (2times2 MIMO) at finite signal to noise ratio (SNR) has been studied. To characterize the trade-off, the outage probability of the mutual information between transmitted and received signals versus SNR is extracted. The diversity gain is the slope of the outage probability versus SNR curve at a particular SNR while the multiplexing gain is the ratio of the system spectral efficiency to the capacity of an additive white Gaussian noise (AWGN) channel. This paper provides a useful tool to examine the diversity-multiplexing trade-off at the 2times2 MIMO system in practical (finite SNR) situation.","PeriodicalId":448587,"journal":{"name":"2007 European Conference on Wireless Technologies","volume":"17 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":"121982897","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: 10
A Novel Method for Direction of Departure Estimation Using a Linear Frequency Modulated Signal 基于线性调频信号的出发方向估计新方法
2007 European Conference on Wireless Technologies Pub Date : 2007-12-17 DOI: 10.1109/ECWT.2007.4403969
S. M. Lopez, B. Huyart, H. Elarja
{"title":"A Novel Method for Direction of Departure Estimation Using a Linear Frequency Modulated Signal","authors":"S. M. Lopez, B. Huyart, H. Elarja","doi":"10.1109/ECWT.2007.4403969","DOIUrl":"https://doi.org/10.1109/ECWT.2007.4403969","url":null,"abstract":"A novel method for the Direction of Departure (DoD) estimation with a parallel transmitter array is presented. It requires the use of a signal which frequency increases linearly in time, regardless of whether this variation is discrete or continuous in time. Due to the properties of these signals, adding different delays to the signals transmitted by each of the antennas enables to separate them at the receiver. The advantages of this novel method are fast real-time measurements, simplicity and low hardware cost. Once separated, the signals can be treated with a high-resolution algorithm to estimate the DoD. In order to validate the capability of this method, simulation results and preliminary real measurements are presented.","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":"121772746","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
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