发布求助
文献互助 智能选刊 最新文献

2010 IEEE Radio and Wireless Symposium (RWS)最新文献

筛选
英文 中文
A 16-element power AIPAA with a 4-bit digital LTCC phase shifter operating at the 5.8 GHz-band for wireless communication and power transmission 16元功率AIPAA, 4位数字LTCC移相器，工作在5.8 ghz频段，用于无线通信和电力传输
2010 IEEE Radio and Wireless Symposium (RWS) Pub Date : 2010-01-10 DOI: 10.1109/RWS.2010.5434181
K. Yamashita, Takeshi Yamamoto, H. Seita, E. Shimane, S. Kawasaki
{"title":"A 16-element power AIPAA with a 4-bit digital LTCC phase shifter operating at the 5.8 GHz-band for wireless communication and power transmission","authors":"K. Yamashita, Takeshi Yamamoto, H. Seita, E. Shimane, S. Kawasaki","doi":"10.1109/RWS.2010.5434181","DOIUrl":"https://doi.org/10.1109/RWS.2010.5434181","url":null,"abstract":"5.8 GHz band digital phase shifters to control a beam direction for an Active Integrated Phased Array Antenna (AIPAA) are designed. The 4-bit phase shifters with integrated GaAs FET SPDT switches are integrated with an LTCC substrate. We realized a low loss 4-bit LTCC phase shifter with the size of 10 mm × 13 mm × 0.55 mm. From the simulation results, the insertion loss of LTCC phase shifter without the switch is simulated with about 0.5dB/bit. The insertion loss of the LTCC phase shifter integrated with the GaAs FET SPDT switches and phase error are measured to be about 2.3dB/bit and less than 15°, respectively. In addition, beam scanning with angles of ±30 degrees was successfully achieved with 10 Mbps MSK signal from the 16-element active integrated phased array antenna.","PeriodicalId":334671,"journal":{"name":"2010 IEEE Radio and Wireless Symposium (RWS)","volume":"25 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121014645","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
Dynamic threshold adaptation for spectrum sensing in cognitive radio systems 认知无线电系统频谱感知的动态阈值自适应
2010 IEEE Radio and Wireless Symposium (RWS) Pub Date : 2010-01-10 DOI: 10.1109/RWS.2010.5434216
Deepak R. Joshi, D. Popescu, O. Dobre
{"title":"Dynamic threshold adaptation for spectrum sensing in cognitive radio systems","authors":"Deepak R. Joshi, D. Popescu, O. Dobre","doi":"10.1109/RWS.2010.5434216","DOIUrl":"https://doi.org/10.1109/RWS.2010.5434216","url":null,"abstract":"In this paper, we investigate dynamic adaptation of the spectrum sensing threshold in cognitive radio systems. We use a filter bank approach for spectrum sensing, in which the available spectrum is divided into sub-bands, and obtain the optimal threshold values by minimizing the corresponding spectrum sensing error subject to constraints on the probabilities of missed detection and false alarms for each sub-bands. Furthermore, we propose a gradient descent based algorithm for threshold adaptation in dynamic scenarios, and provide numerical results obtained from simulations, these show how the proposed algorithm adjusts the threshold dynamically to minimize the spectrum sensing error subject to specified constraints.","PeriodicalId":334671,"journal":{"name":"2010 IEEE Radio and Wireless Symposium (RWS)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121104935","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: 18
Cross-layer resource allocation for wireless distributed computing networks 无线分布式计算网络的跨层资源分配
2010 IEEE Radio and Wireless Symposium (RWS) Pub Date : 2010-01-10 DOI: 10.1109/RWS.2010.5434191
Xuetao Chen, S. Hasan, T. Bose, Jeffrey H. Reed
{"title":"Cross-layer resource allocation for wireless distributed computing networks","authors":"Xuetao Chen, S. Hasan, T. Bose, Jeffrey H. Reed","doi":"10.1109/RWS.2010.5434191","DOIUrl":"https://doi.org/10.1109/RWS.2010.5434191","url":null,"abstract":"The allocation of communication power consumption and computing rate is inherently one of the cross-layer problems in wireless distributed computing networks (WDCNs). This paper exploits a subgradient approach to choose the optimal power-rate pair for maximizing the network computing capability and minimizing the power consumption. The impact of heterogeneous channel conditions for different nodes are modeled as a penalty term in the objective function to balance the performance and power consumption, and increase the amount of the power for the computing task. Simulation results show that both energy efficiency and the distributed computing power ratio (DCPR) can be increased by considering the wireless channel conditions. These results provide some guidelines for designing the protocol dedicated to WDCNs.","PeriodicalId":334671,"journal":{"name":"2010 IEEE Radio and Wireless Symposium (RWS)","volume":"280 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121406001","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: 12
Evaluation of the reconfigurable Printed Fractal Tree antenna for enhanced pattern diversity in MIMO systems 可重构印刷分形树天线在MIMO系统中增强方向分集的评价
2010 IEEE Radio and Wireless Symposium (RWS) Pub Date : 2010-01-10 DOI: 10.1109/RWS.2010.5434232
A. Lackpour, P. Mookiah, M. Olivieri, K. Dandekar
{"title":"Evaluation of the reconfigurable Printed Fractal Tree antenna for enhanced pattern diversity in MIMO systems","authors":"A. Lackpour, P. Mookiah, M. Olivieri, K. Dandekar","doi":"10.1109/RWS.2010.5434232","DOIUrl":"https://doi.org/10.1109/RWS.2010.5434232","url":null,"abstract":"This paper evaluates the reconfigurability of a 2D fractal tree antenna to improve the capacity of a 2×2 MIMO link using pattern diversity. Each fractal tree antenna possesses several degrees of freedom: number of fractal stages, branches per stage, angle between branches, and parent-to-child branch scaling length. Simulations of various Reconfigurable Printed Fractal Tree Arrays (RPFTAs) are conducted so their spatial correlation and MIMO channel capacity can be found. Capacity improvement from two different RPFTAs are reported, assuming a perfect feedback channel.","PeriodicalId":334671,"journal":{"name":"2010 IEEE Radio and Wireless Symposium (RWS)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114263905","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
A compact high directivity coupler with ±0.15dB error under VSWR 2.5∶1 for 3×3mm2 UMTS power amplifier modules 用于3×3mm2 UMTS功率放大器模块的高指向性耦合器，在VSWR 2.5∶1下误差为±0.15dB
2010 IEEE Radio and Wireless Symposium (RWS) Pub Date : 2010-01-10 DOI: 10.1109/RWS.2010.5434159
Yang Li, D. Prikhodko, Rick Zhu, Hichem Abdallah, S. Nabokin, Maxim Batrin, Y. Tkachenko
{"title":"A compact high directivity coupler with ±0.15dB error under VSWR 2.5∶1 for 3×3mm2 UMTS power amplifier modules","authors":"Yang Li, D. Prikhodko, Rick Zhu, Hichem Abdallah, S. Nabokin, Maxim Batrin, Y. Tkachenko","doi":"10.1109/RWS.2010.5434159","DOIUrl":"https://doi.org/10.1109/RWS.2010.5434159","url":null,"abstract":"This paper presents an approach to design high directivity couplers on compact multilayer power amplifier module (PAM). Coplanar and bilevel coupled lines structures are analyzed and compared. The effects of layout are investigated. A bilevel coupled line coupler is developed and integrated into 700MHz UMTS 3×3mm2 PAM. It achieves more than 28dB directivity and the coupling factor variation of PAM is within ±0.15dB under VSWR 2.5∶1.","PeriodicalId":334671,"journal":{"name":"2010 IEEE Radio and Wireless Symposium (RWS)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126994847","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: 6
A reconfigurable UWB system for real-time through wall imaging applications 一个可重构的UWB系统，用于实时穿墙成像应用
2010 IEEE Radio and Wireless Symposium (RWS) Pub Date : 2010-01-10 DOI: 10.1109/RWS.2010.5434156
Yazhou Wang, Yunqiang Yang, A. Fathy
{"title":"A reconfigurable UWB system for real-time through wall imaging applications","authors":"Yazhou Wang, Yunqiang Yang, A. Fathy","doi":"10.1109/RWS.2010.5434156","DOIUrl":"https://doi.org/10.1109/RWS.2010.5434156","url":null,"abstract":"A reconfigurable ultra-wideband system for through wall imaging application has been developed. The radar operating frequency can be selected to cover either 2–4 GHz or 8–10 GHz UWB bands. The lower UWB band is used to minimize through wall attenuation for relatively high loss wall materials, but the upper band can be utilized to achieve high image resolution for relatively low loss walls. A synthetic aperture radar has been developed that utilizes a wideband tapered slot Vivaldi array and covers an ultra wide frequency range, extending over 2–10 GHz; thus covering both regions. The developed beam-forming algorithm is based on near field models, and accounts for wall effects. Both the wave refraction and propagation speed changes are taken into considerations to obtain accurate images of various targets. Real-time experiments have been performed through both dry-walls and brick-walls to validate the performance of the radar system.","PeriodicalId":334671,"journal":{"name":"2010 IEEE Radio and Wireless Symposium (RWS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125515931","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
Resonant based microwave biosensor for biological cells discrimination 基于共振的微波生物传感器用于生物细胞识别
2010 IEEE Radio and Wireless Symposium (RWS) Pub Date : 2010-01-10 DOI: 10.1109/RWS.2010.5434223
K. Grenier, D. Dubuc, P. Poleni, M. Kumemura, H. Toshiyoshi, T. Fujii, H. Fujita
{"title":"Resonant based microwave biosensor for biological cells discrimination","authors":"K. Grenier, D. Dubuc, P. Poleni, M. Kumemura, H. Toshiyoshi, T. Fujii, H. Fujita","doi":"10.1109/RWS.2010.5434223","DOIUrl":"https://doi.org/10.1109/RWS.2010.5434223","url":null,"abstract":"This publication deals with a resonant RF-based biosensor for in-liquid operation. Stop-band filter modeling and characterizations are investigated in order to discriminate dead and alive suspensions of human cultured cells. This proof of concept demonstrator features noticeable contrasts on both resonant frequency (7%) and amplitude (2.1 dB). Theses results consequently demonstrate that RF detection can provide a non invasive sensing technique, which is compatible with a lab-on-a-chip approach to discriminate the pathological state of cells.","PeriodicalId":334671,"journal":{"name":"2010 IEEE Radio and Wireless Symposium (RWS)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126571638","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: 33
Envelope tracking power amplifiers with reduced peak-to-average power ratio RF input signals 具有降低射频输入信号峰均功率比的包络跟踪功率放大器
2010 IEEE Radio and Wireless Symposium (RWS) Pub Date : 2010-01-10 DOI: 10.1109/RWS.2010.5434221
Jinseong Jeong, D. Kimball, M. Kwak, P. Draxler, P. Asbeck
{"title":"Envelope tracking power amplifiers with reduced peak-to-average power ratio RF input signals","authors":"Jinseong Jeong, D. Kimball, M. Kwak, P. Draxler, P. Asbeck","doi":"10.1109/RWS.2010.5434221","DOIUrl":"https://doi.org/10.1109/RWS.2010.5434221","url":null,"abstract":"This paper presents a new technique to reduce the peak-to-average power ratio (PAPR) of the RF input signals used in envelope tracking (ET) power amplifiers without degrading the linearity and efficiency performance of the RF stages. Due to heavy gain compression, ET amplifiers can suffer from inefficient driver stages. The reduced PAPR RF input signal improves the efficiency of the driver amplifier thereby potentially improving the overall efficiency of the ET amplifier. This technique is demonstrated for a single carrier WCDMA signal using a dynamic supply modulator and a RF stage based on a GaAs HVHBT. The measurement shows that a power added efficiency (PAE) of 74% can be maintained for the RF stage while the PAPR of the RF input signal is reduced from 7.6 dB to 5.2 dB. The overall PAE accounting for the supply modulator is greater than 50% with an average output power of greater than 26 W and an adjacent channel leakage ratio of less than −45 and −53 dBc at 5- and 10-MHz frequency offsets, respectively.","PeriodicalId":334671,"journal":{"name":"2010 IEEE Radio and Wireless Symposium (RWS)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126709758","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: 16
A decoupling technique for compact antenna arrays in handheld terminals 手持终端紧凑型天线阵列的去耦技术
2010 IEEE Radio and Wireless Symposium (RWS) Pub Date : 2010-01-10 DOI: 10.1109/RWS.2010.5434195
L. Yeung, Y. Wang
{"title":"A decoupling technique for compact antenna arrays in handheld terminals","authors":"L. Yeung, Y. Wang","doi":"10.1109/RWS.2010.5434195","DOIUrl":"https://doi.org/10.1109/RWS.2010.5434195","url":null,"abstract":"A practical method for decoupling small-form two- and four-element antenna arrays is discussed. This method is generic in the sense that it works on any types of antenna elements as long as they are identical and symmetrically arranged. The basic principle is to use a passive multi-port network to separate out various orthogonal radiation modes of a highly-coupled array for transmission and reception. In other words, the array as a whole, rather than each element, is treated as a single radiation entity. As these mutually orthogonal modes are uncorrelated and have no real energy exchange among them, the network ports associated with these modes are well isolated from each other. Therefore, problems on impedance matching and signal correlation due to close spacing of elements in traditional compact arrays can be avoided. Experimental arrays of four-element with around 0.1λ element-to-element separation have been fabricated and tested to demonstrate the practicability of the idea. Measurement results are in good agreement with expectations, showing promising potential of the proposed approach for miniaturized arrays in handheld terminals.","PeriodicalId":334671,"journal":{"name":"2010 IEEE Radio and Wireless Symposium (RWS)","volume":"236 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132160794","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
Experimental evaluation of high speed parallel data transmission technology for wireless repeater system 无线中继器系统高速并行数据传输技术的实验评价
2010 IEEE Radio and Wireless Symposium (RWS) Pub Date : 2010-01-10 DOI: 10.1109/RWS.2010.5434178
T. Seki, K. Nishimori, K. Hiraga, K. Nishikawa
{"title":"Experimental evaluation of high speed parallel data transmission technology for wireless repeater system","authors":"T. Seki, K. Nishimori, K. Hiraga, K. Nishikawa","doi":"10.1109/RWS.2010.5434178","DOIUrl":"https://doi.org/10.1109/RWS.2010.5434178","url":null,"abstract":"System studies are being conducted at millimeter-wave frequency for high-speed wireless communications such as several Gbit/s. However, the highly rectilinear propagation characteristics of these systems, created by the millimeter-wave frequencies, place significant limitations on the applications and the usage environments. To address this problem, we already proposed the adoption of a high data-rate relay system using short range multi input multi output (MIMO) transmission technology. This paper reports the results of experiments conducted to verify the simulation method. We evaluate 4x4 MIMO transmission, using the signal specified by IEEE 802.11n, and confirm that the optimal array spacing. The measured and simulated frequency utilization rates of 4×4 MIMO transmission are in good agreement. Frequency utilization of over 20 bits/s/Hz can be achieved: 800Mbps/1.6Gbps transmission can be realized when the bandwidth of 40/80 MHz is assumed. Moreover, the measured and simulated results indicate higher frequency utilization rates than found in the i.i.d. channel.","PeriodicalId":334671,"journal":{"name":"2010 IEEE Radio and Wireless Symposium (RWS)","volume":"145 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133767939","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: 6
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：481959085
Book学术官方微信