发布求助
文献互助 智能选刊 最新文献

2006 IEEE Radio and Wireless Symposium最新文献

筛选
英文 中文
Joint rate and data detection in variable-rate CDMA systems 可变速率CDMA系统中的联合速率和数据检测
2006 IEEE Radio and Wireless Symposium Pub Date : 2006-04-10 DOI: 10.1109/RWS.2006.1615171
S. Buzzi, S. Sardellitti
{"title":"Joint rate and data detection in variable-rate CDMA systems","authors":"S. Buzzi, S. Sardellitti","doi":"10.1109/RWS.2006.1615171","DOIUrl":"https://doi.org/10.1109/RWS.2006.1615171","url":null,"abstract":"In this paper we consider a variable bit-rate code division multiple access systems (CDMA), wherein each user may transmit at one out of a set of available data-rates. The problem of joint detection of the data-rate and of the information symbols transmitted by each user is addressed. First of all, the optimum maximum-likelihood receiver is derived. Since this receiver has a complexity exponential both in the number of users and in the length of the data packet, several suboptimum receivers are also derived. Simulation results finally show that these suboptimum receivers, while performing worse than the optimum receiver, achieve satisfactory performance with more limited computational complexity.","PeriodicalId":244560,"journal":{"name":"2006 IEEE Radio and Wireless Symposium","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128746362","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
Differential transmission lines on silicon based on periodic photonic bandgap structures 基于周期性光子带隙结构的硅差分传输线
2006 IEEE Radio and Wireless Symposium Pub Date : 2006-04-10 DOI: 10.1109/RWS.2006.1615131
S. El Rai, R. Tempel
{"title":"Differential transmission lines on silicon based on periodic photonic bandgap structures","authors":"S. El Rai, R. Tempel","doi":"10.1109/RWS.2006.1615131","DOIUrl":"https://doi.org/10.1109/RWS.2006.1615131","url":null,"abstract":"Differential transmission lines (DTL) can be synthesized by identical or different periodic structures (PS). These PS can be used not only for matching one circuit to another; also small resonators can be established serving in filters or oscillators. These new DTL - by using the proposed PS - allow characteristic impedances beyond that of classical TL and in addition at much smaller size. It is the first time that DTL structures form a real alternative for applications in MMIC design below 10 GHz.","PeriodicalId":244560,"journal":{"name":"2006 IEEE Radio and Wireless Symposium","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121702535","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 CMOS VCO with two tuning inputs applied for a wideband GFSK-modulated frequency synthesizer 用于宽带gfsk调制频率合成器的双调谐输入CMOS压控振荡器的设计
2006 IEEE Radio and Wireless Symposium Pub Date : 2006-04-10 DOI: 10.1109/RWS.2006.1615190
K. Peng, C. Huang, C. Li, T. Horng, S.F. Lee
{"title":"Design of a CMOS VCO with two tuning inputs applied for a wideband GFSK-modulated frequency synthesizer","authors":"K. Peng, C. Huang, C. Li, T. Horng, S.F. Lee","doi":"10.1109/RWS.2006.1615190","DOIUrl":"https://doi.org/10.1109/RWS.2006.1615190","url":null,"abstract":"This paper describes the design considerations of a 2.4 GHz CMOS voltage-controlled oscillator (VCO) with two tuning inputs when used in a wideband GFSK-modulated frequency synthesizer based on a two-point delta-sigma modulation (TPDSM) architecture. One tuning input is provided mainly for the fractional-TV frequency synthesis, and the other one is for the direct GFSK modulation. In the VCO design, the tuning sensitivity for GFSK modulation is optimized including the effects of digital-to-analog converter (DAC). In addition, the size of spiral inductor in the LC tank is minimized without the cost of reducing quality (Q) factor. The implemented TPDSM-based GFSK-modulated frequency synthesizer can achieve a maximum data rate of up to 2.5 Mbps with an FSK error less than 1.4% and a phase-locked loop (PLL) settling time less than 110 /spl mu/s. The modulated frequency synthesizer with such good performances has promising application potential in a low-power solution for the enhanced data rate (EDR) Bluetooth transmitters.","PeriodicalId":244560,"journal":{"name":"2006 IEEE Radio and Wireless Symposium","volume":"79 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128103730","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
Multiple-antenna systems and wireless networks 多天线系统和无线网络
2006 IEEE Radio and Wireless Symposium Pub Date : 2006-04-10 DOI: 10.1109/RWS.2006.1615095
B. Hassibi
{"title":"Multiple-antenna systems and wireless networks","authors":"B. Hassibi","doi":"10.1109/RWS.2006.1615095","DOIUrl":"https://doi.org/10.1109/RWS.2006.1615095","url":null,"abstract":"The use of multiple antennas, at the transmitter, receiver or both, promises both higher data rates as well as greater reliability in point-to-point communication channels. While this is now well understood, it is only recently that the impact of multiple antenna systems in a wireless network is being systematically assessed. In this paper, using the example of the downlink of a cellular system, we review some of the issues related to throughput, delay and scheduling that arise when multiple antennas are deployed at the base station or at the user terminals.","PeriodicalId":244560,"journal":{"name":"2006 IEEE Radio and Wireless Symposium","volume":"724 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133753197","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
Large-signal characterization and modeling approach suitable for the design of actively load-modulated amplifiers 适用于主动负载调制放大器设计的大信号表征和建模方法
2006 IEEE Radio and Wireless Symposium Pub Date : 2006-04-10 DOI: 10.1109/RWS.2006.1615211
J. Sirois, S. Boumaiza, F. Ghannouchi
{"title":"Large-signal characterization and modeling approach suitable for the design of actively load-modulated amplifiers","authors":"J. Sirois, S. Boumaiza, F. Ghannouchi","doi":"10.1109/RWS.2006.1615211","DOIUrl":"https://doi.org/10.1109/RWS.2006.1615211","url":null,"abstract":"An active load pull based large signal modeling approach suitable for designing and optimizing load modulated amplifiers, such as Doherty or LINC based amplifiers, is proposed. The dynamic loads seen by the amplifier's transistor was optimized using a large signal load pull based behavior model built into a CAD software. The simulation versus measurement results demonstrated the strong ability of the constructed model to predict the nonlinear behavior of actively loaded amplifiers. The developed approach was used to optimize the design of 16 watts peak-envelope power Doherty amplifier in terms of power added efficiency, AM/AM and AM/PM distortions.","PeriodicalId":244560,"journal":{"name":"2006 IEEE Radio and Wireless Symposium","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133932778","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
1.7 GHz/2.1 GHz dual-band feed-forward amplifier 1.7 GHz/2.1 GHz双频前馈放大器
2006 IEEE Radio and Wireless Symposium Pub Date : 2006-04-10 DOI: 10.1109/RWS.2006.1615145
Y. Suzuki, S. Narahashi
{"title":"1.7 GHz/2.1 GHz dual-band feed-forward amplifier","authors":"Y. Suzuki, S. Narahashi","doi":"10.1109/RWS.2006.1615145","DOIUrl":"https://doi.org/10.1109/RWS.2006.1615145","url":null,"abstract":"This paper proposes a new feed-forward amplifier configuration that simultaneously compensates for the intermodulation distortion components in each band, when signals of different frequency bands are input. The signal cancellation loop and distortion cancellation loop in the proposed feed-forward configuration have a filter and vector regulator for each band. The filter only selects the desired frequency band component from the input signals. Employing the filters means that the whole bandwidth of the input signals is converted to an operable bandwidth for the vector regulators. Therefore, the vector regulator can sufficiently adjust the amplitude and phase of the selected frequency band component. The proposed configuration achieves sufficient intermodulation distortion compensation for each band. A 1.7 GHz/2.1 GHz dual-band, 1-W class feed-forward amplifier is investigated. The third-order intermodulation distortion is less than -70 dBc when the output power is 22 dBm for each band. The saturation output power at 1.7 GHz and 2.1 GHz is 28 dBm and 30 dBm, respectively. These experimental results confirm the validity of the proposed feed-forward amplifier configuration.","PeriodicalId":244560,"journal":{"name":"2006 IEEE Radio and Wireless Symposium","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132627916","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-standard wireless receiver utilizing reconfigurable antennas and RF front ends 采用可重构天线和射频前端的多标准无线接收机
2006 IEEE Radio and Wireless Symposium Pub Date : 2006-04-10 DOI: 10.1109/RWS.2006.1615179
Chunna Zhang, Yongping Han, Songnan Yang, A. Fathy, S. El-Ghazaly, V. Nair
{"title":"Multi-standard wireless receiver utilizing reconfigurable antennas and RF front ends","authors":"Chunna Zhang, Yongping Han, Songnan Yang, A. Fathy, S. El-Ghazaly, V. Nair","doi":"10.1109/RWS.2006.1615179","DOIUrl":"https://doi.org/10.1109/RWS.2006.1615179","url":null,"abstract":"Reconfigurable RF front ends and antennas have been considered for the development of a universal wireless receiver. Examples of reconfigurable circuits and antenna structures are presented here. The reconfigurable performance can be realized by replacing hardwire connections with multitude of switches.","PeriodicalId":244560,"journal":{"name":"2006 IEEE Radio and Wireless Symposium","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133647840","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
Analytical approach to I/Q imbalance in OFDM, CDMA and MC-CDMA based systems 基于OFDM、CDMA和MC-CDMA系统的I/Q不平衡分析方法
2006 IEEE Radio and Wireless Symposium Pub Date : 2006-04-10 DOI: 10.1109/RWS.2006.1615217
P. Rykaczewski, M. Valkama, M. Renfors
{"title":"Analytical approach to I/Q imbalance in OFDM, CDMA and MC-CDMA based systems","authors":"P. Rykaczewski, M. Valkama, M. Renfors","doi":"10.1109/RWS.2006.1615217","DOIUrl":"https://doi.org/10.1109/RWS.2006.1615217","url":null,"abstract":"Growing requirements set upon communications transceivers lead to high sensitivity to non-idealities of analog front-end components. Mismatches in the amplitudes and phases of the I and Q signal branches is one of the major concerns resulting in insufficient rejection of the image frequency band. This paper presents a novel analytical model of I/Q imbalance in OFDM, CDMA and MC-CDMA based communications systems. According to the obtained results, I/Q imbalance effects depend heavily on the applied spreading code class and cell load in case of CDMA and MC-CDMA, which should be taken into account in the system and receiver design. Outcomes of the theoretical studies are verified by extensive system simulations.","PeriodicalId":244560,"journal":{"name":"2006 IEEE Radio and Wireless Symposium","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125118856","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: 13
Route selection using retransmission packets for video streaming on ad hoc networks 基于重传分组的自组织网络视频流路由选择
2006 IEEE Radio and Wireless Symposium Pub Date : 2006-04-10 DOI: 10.1109/RWS.2006.1615230
H. Fujisawa, H. Minami, M. Yamamoto, Y. Izumi, Y. Fujita
{"title":"Route selection using retransmission packets for video streaming on ad hoc networks","authors":"H. Fujisawa, H. Minami, M. Yamamoto, Y. Izumi, Y. Fujita","doi":"10.1109/RWS.2006.1615230","DOIUrl":"https://doi.org/10.1109/RWS.2006.1615230","url":null,"abstract":"An ad hoc network system can be deployed rapidly and easily. However, transmitting a real-time video stream over an ad hoc network create a video interruption issue because wireless links in an ad hoc network are broken frequently due to noise signals, attenuation, shadowing effect and nodes mobility. This paper studies a video transport scheme that creates multi-path route, which consists of a main route for video streaming and sub routes for retransmission packets generated by data link layer ARQ to complement the packet loss of main route, and selects the suitable main route from these routes according to the network condition. Furthermore, we report an experiment using a camera as a mobile video source and notebook computers as ad hoc nodes. The results show that this scheme can select a route that has sufficient throughput for video streaming, and when the camera moves, the route can be changed seamlessly without video interruption.","PeriodicalId":244560,"journal":{"name":"2006 IEEE Radio and Wireless Symposium","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123882250","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 of OFDM modem with alternative basis functions 可选基函数OFDM调制解调器的性能
2006 IEEE Radio and Wireless Symposium Pub Date : 2006-04-10 DOI: 10.1109/RWS.2006.1615216
C. Tang, G. Mandyam
{"title":"Performance of OFDM modem with alternative basis functions","authors":"C. Tang, G. Mandyam","doi":"10.1109/RWS.2006.1615216","DOIUrl":"https://doi.org/10.1109/RWS.2006.1615216","url":null,"abstract":"Conventional orthogonal frequency division multiplexing (OFDM) systems use discrete Fourier transform (DFT) as the basis function. Recently, it was shown that it is possible to use other sinusoidal transforms, e.g. discrete cosine transform (DCT), as OFDM basis functions. However, relative little is known regarding the performance of these alternative basis functions and how they compare with traditional DFT. This paper investigates the performance of OFDM modems employing alternative basis functions under different fading channel models in both double sideband and single sideband operation modes. A semi-analytical approach is also developed to predict and compare the error performance between different basis functions. The predicted results are close to the simulations thus verifying the simulation model. It was found that in general DFT has a better error performance, but interspersed basis is capable of offering a higher net throughout under certain channel conditions.","PeriodicalId":244560,"journal":{"name":"2006 IEEE Radio and Wireless Symposium","volume":"168 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120886317","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
首页 上一页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：604180095
Book学术官方微信