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2006 IEEE Radio and Wireless Symposium最新文献

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Napping backbones: energy efficient topology control for wireless sensor networks 午睡骨干网:无线传感器网络的高能效拓扑控制
2006 IEEE Radio and Wireless Symposium Pub Date : 2006-04-10 DOI: 10.1109/RWS.2006.1615231
R. Ghosh, S. Basagni
{"title":"Napping backbones: energy efficient topology control for wireless sensor networks","authors":"R. Ghosh, S. Basagni","doi":"10.1109/RWS.2006.1615231","DOIUrl":"https://doi.org/10.1109/RWS.2006.1615231","url":null,"abstract":"In this study we have investigated the effectiveness of building \"napping backbones\" for data dissemination in wireless sensor networks. The NAPBACK protocol builds connected backbones whose nodes are endowed with a sleep/awake schedule that induces considerable energy savings, and hence prolongs the network lifetime. Via simulations on networks with up to 250 nodes we have observed increases on network lifetime up to almost 70% with respect to previous topology control protocols (S-DMAC). Increased latency is the price to pay for the improvements on lifetime, which currently makes NAPBACK a viable solution for delay-insensitive WSN applications. Multifold are the research directions opened by this initial study. We are planning to design different methods for defining the schedules of the backbone nodes. Final aims include the minimization of the latency, as well as throughput maximization. Sleep/awake scheduling methods should also be independent of nodes synchronization, and could be based on deterministic strategies, rather than the simple randomized technique used here.","PeriodicalId":244560,"journal":{"name":"2006 IEEE Radio and Wireless Symposium","volume":"19 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":"133933595","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 63 % PAE and 10:1 VSWR at 3.3 V power amplifier in 0.25 /spl mu/m SiGe BiCMOS for DCS and PCS applications 在0.25 /spl mu/m SiGe BiCMOS中，用于DCS和pc应用的63% PAE和10:1 VSWR 3.3 V功率放大器
2006 IEEE Radio and Wireless Symposium Pub Date : 2006-04-10 DOI: 10.1109/RWS.2006.1615141
M. Maiore, G. Berretta, G. Conti, E. Pirrone, C. Campisi
{"title":"A 63 % PAE and 10:1 VSWR at 3.3 V power amplifier in 0.25 /spl mu/m SiGe BiCMOS for DCS and PCS applications","authors":"M. Maiore, G. Berretta, G. Conti, E. Pirrone, C. Campisi","doi":"10.1109/RWS.2006.1615141","DOIUrl":"https://doi.org/10.1109/RWS.2006.1615141","url":null,"abstract":"A fully integrated monolithic power amplifier (PA) for DCS/PCS applications has been integrated in 0.25 /spl mu/m SiGe BiCMOS technology. The three-stages power amplifier delivers 31.8 dBm of output power (Pout) with 63% power added efficiency (PAE). A 100 /spl Omega/ differential input impedance power amplifier module (PAM) has been designed to validate the proposed circuit. The PA includes an on chip temperature compensated bias block. The bulky and expensive RF chokes normally used for the first and second stage have been integrated on-chip, in order to minimize the number of passive components into the module. The reported PA is planned to be used in an envelope elimination and restoration (EER) architecture with 3.3 V supply voltage. Furthermore, the PA can withstand up to 10:1 load voltage standing wave ratio (VSWR) at no permanent damage.","PeriodicalId":244560,"journal":{"name":"2006 IEEE Radio and Wireless Symposium","volume":"3 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":"131757135","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
Design and implementation of a new Butler matrix using slot line technology 利用槽线技术设计和实现一个新的管家矩阵
2006 IEEE Radio and Wireless Symposium Pub Date : 2006-04-10 DOI: 10.1109/RWS.2006.1615120
M. Nedil, T. Denidni, L. Talbi
{"title":"Design and implementation of a new Butler matrix using slot line technology","authors":"M. Nedil, T. Denidni, L. Talbi","doi":"10.1109/RWS.2006.1615120","DOIUrl":"https://doi.org/10.1109/RWS.2006.1615120","url":null,"abstract":"In this paper, a 4 by 4 Butler matrix beam forming network for multibeam antennas was designed at 5.8 GHz. The structure is implemented using slot line technology. The use of the slot line technology is justified by the useless of air bridges as used in the conventional CPW one. Moreover, a new hybrid coupler and cross-over were designed and fabricated to test the feasibility of each element. To examine the performances of the proposed matrix, experimental measurements were carried out. To validate our approach, a comparison between measurements and simulations are given.","PeriodicalId":244560,"journal":{"name":"2006 IEEE Radio and Wireless Symposium","volume":"49 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":"131009880","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
Site-specific MIMO channel optimization using adaptive polarization 使用自适应极化的站点特定MIMO信道优化
2006 IEEE Radio and Wireless Symposium Pub Date : 2006-04-10 DOI: 10.1109/RWS.2006.1615184
M. Elnaggar, S. Safavi-Naeini, S. Chaudhuri
{"title":"Site-specific MIMO channel optimization using adaptive polarization","authors":"M. Elnaggar, S. Safavi-Naeini, S. Chaudhuri","doi":"10.1109/RWS.2006.1615184","DOIUrl":"https://doi.org/10.1109/RWS.2006.1615184","url":null,"abstract":"We investigate the channel capacity improvement using adaptive polarization for a site-specific (4,4) multiple-input multiple-output (MIMO) system in a corridor. The physical arrays are linear equally spaced /spl lambda//2-dipoles (/spl lambda//2 separated, vertically polarized at the static end and dually-polarized at the adaptive moving end). A switching network at the moving end makes several polarization combinations and, accordingly, can adaptively enhance the channel capacity. We consider a rank-deficient scenario (array axis parallel to the corridor length at both ends) assuming a narrow-band time-invariant frequency-flat reciprocal channel, which is deterministically predicted through image ray tracing (IRT) simulations at 2.4 GHz.","PeriodicalId":244560,"journal":{"name":"2006 IEEE Radio and Wireless Symposium","volume":"22 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":"130956669","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
A new design of carrier interferometry OFDM with FFT as spreading codes 一种以FFT为扩频码的载波干涉OFDM新设计
2006 IEEE Radio and Wireless Symposium Pub Date : 2006-04-10 DOI: 10.1109/RWS.2006.1615214
K. Anwar, H. Yamamoto
{"title":"A new design of carrier interferometry OFDM with FFT as spreading codes","authors":"K. Anwar, H. Yamamoto","doi":"10.1109/RWS.2006.1615214","DOIUrl":"https://doi.org/10.1109/RWS.2006.1615214","url":null,"abstract":"In this paper, we propose a new design of efficient carrier interferometry orthogonal frequency division multiplexing (CI/OFDM) by using fast Fourier transform (FFT) as spreading codes. First, we propose the use of both positive and negative frequency of the IFFT rather than only using the positive part as in conventional method. It results new CI/OFDM waveforms which only requires a half of FFT points. Second, we replace CI spreading with FFT for achieving lower complexity because complexity of CI is similar to that of discrete Fourier transform (DFT). Our results confirm that the proposed design is capable of achieving high efficiency and low complexity while providing high performance.","PeriodicalId":244560,"journal":{"name":"2006 IEEE Radio and Wireless Symposium","volume":"241 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":"133558327","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
A novel reconfigurable maze antenna for multi-service wireless universal receivers 一种用于多业务无线通用接收机的新型可重构迷宫天线
2006 IEEE Radio and Wireless Symposium Pub Date : 2006-04-10 DOI: 10.1109/RWS.2006.1615128
Songnan Yang, H. Pan, A. Fathy, S. El-Ghazaly, V. Nair
{"title":"A novel reconfigurable maze antenna for multi-service wireless universal receivers","authors":"Songnan Yang, H. Pan, A. Fathy, S. El-Ghazaly, V. Nair","doi":"10.1109/RWS.2006.1615128","DOIUrl":"https://doi.org/10.1109/RWS.2006.1615128","url":null,"abstract":"A novel design of multi-band multi-service reconfigurable antenna has been developed, and is comprised of multi-segment printed loop structure. The developed antenna looks like a maze and can be easily configured by altering its multi-segment interconnectivity using multitude of switches. Modeled and measured results including the effects of the switching elements will be presented here in details.","PeriodicalId":244560,"journal":{"name":"2006 IEEE Radio and Wireless Symposium","volume":"24 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":"132183054","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: 15
MIMO capacity improvement using smart passive receive antennas 使用智能无源接收天线提高MIMO容量
2006 IEEE Radio and Wireless Symposium Pub Date : 2006-04-10 DOI: 10.1109/RWS.2006.1615097
J. Ahmadi-shokouh, S. H. Jamali, S. Safavi-Naeini, S. Nikneshan
{"title":"MIMO capacity improvement using smart passive receive antennas","authors":"J. Ahmadi-shokouh, S. H. Jamali, S. Safavi-Naeini, S. Nikneshan","doi":"10.1109/RWS.2006.1615097","DOIUrl":"https://doi.org/10.1109/RWS.2006.1615097","url":null,"abstract":"This paper presents a novel structure to enhance the capacity of multi-input and multi-output (MIMO) systems using the passive smart antenna concept. The proposed structure consists of a large number of receive antenna elements (n/sub s/) and a passive weighting process. This process selects n/sub r/ < n/sub s/ out of n/sub s/ antennas after weighting them properly in such a way that to enhance the capacity. The simulation results show that when the number of the receive antenna elements increases beyond a limit, the capacity improves significantly. Furthermore, the same performance as full-complexity MIMO structure can be achieved using the passive receive beamformer but with less radio frequency (RF) chains.","PeriodicalId":244560,"journal":{"name":"2006 IEEE Radio and Wireless Symposium","volume":"118 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":"133199649","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
An ultra-wideband low power consumption differential low noise amplifier in SiGe:C BiCMOS technology 一种基于SiGe:C BiCMOS技术的超宽带低功耗差分低噪声放大器
2006 IEEE Radio and Wireless Symposium Pub Date : 2006-04-10 DOI: 10.1109/RWS.2006.1615106
P. K. Datta, G. Fischer
{"title":"An ultra-wideband low power consumption differential low noise amplifier in SiGe:C BiCMOS technology","authors":"P. K. Datta, G. Fischer","doi":"10.1109/RWS.2006.1615106","DOIUrl":"https://doi.org/10.1109/RWS.2006.1615106","url":null,"abstract":"A differential low noise amplifier (LNA) for ultra-wideband (UWB) applications is presented. The LNA has a -3 dB bandwidth of more than 2 to 12 GHz. The maximum gain is 14.5 dB with fairly flat characteristics. In the UWB frequency range of 3.1 to 10.6 GHz the gain ripple is less than 1.3 dB. Good impedance matching is obtained with |S/sub 11/| below -6.7 dB and |S/sub 22/| below -7.1 dB in the whole UWB range. The LNA consumes quite low dc power. The current consumption is 6.5 mA from a 2.5 V supply. The noise figure of the LNA is 3.9 dB to 5.5 dB in the whole UWB range. The input referred third-order intercept point IIP3 is -7.1 dBm and 1 dB compression point P/sub 1dB/ is -16.6 dBm measured at 7 GHz. This LNA is fully integrated and occupies a chip area of 0.9 mm including pads.","PeriodicalId":244560,"journal":{"name":"2006 IEEE Radio and Wireless Symposium","volume":"39 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":"116321160","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
Direct-conversion receiver for ubiquitous communications 用于无所不在通信的直接转换接收机
2006 IEEE Radio and Wireless Symposium Pub Date : 2006-04-10 DOI: 10.1109/RWS.2006.1615105
J. Kaukovuori, J. Jarvinen, J. Ryynanen, J. Jussila, K. Kivekas, K. Halonen
{"title":"Direct-conversion receiver for ubiquitous communications","authors":"J. Kaukovuori, J. Jarvinen, J. Ryynanen, J. Jussila, K. Kivekas, K. Halonen","doi":"10.1109/RWS.2006.1615105","DOIUrl":"https://doi.org/10.1109/RWS.2006.1615105","url":null,"abstract":"A direct-conversion receiver for a 2.4-GHz sensor network is described. The receiver is designed to operate in a Bluetooth system where slight changes are made in the radio parameters to meet the low power requirement. The receiver includes an LNA, downconversion mixers, a 90-degree phase shift circuit, analog filters, a 1-bit analog-to-digital converter, and a received signal strength indicator (RSSI). The receiver consumes 4.1 mA from a 1.2-V power supply and it achieves 43-dB voltage gain, 25-dB noise figure, -22-dBm IIP3, and +11-dBm IIP2.","PeriodicalId":244560,"journal":{"name":"2006 IEEE Radio and Wireless Symposium","volume":"17 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":"123724913","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
Mercury/waterfilling for fixed wireless OFDM systems 用于固定无线OFDM系统的汞/充水
2006 IEEE Radio and Wireless Symposium Pub Date : 2006-04-10 DOI: 10.1109/RWS.2006.1615132
A. Lozano, A. Tulino, S. Verdú
{"title":"Mercury/waterfilling for fixed wireless OFDM systems","authors":"A. Lozano, A. Tulino, S. Verdú","doi":"10.1109/RWS.2006.1615132","DOIUrl":"https://doi.org/10.1109/RWS.2006.1615132","url":null,"abstract":"Fixed wireless systems are designed to provide broadband connectivity to residential and enterprise customers. Since they typically operate in frequency-selective low-Doppler conditions, a preferred signalling choice is OFDM (orthogonal frequency-division multiplexing). In contrast with mobile systems, where the channel variations are often too rapid to be followed by the transmitter, in fixed wireless such variations can be accurately tracked. This provides the added flexibility of allocating power over the OFDM tones. For ideal Gaussian signals, the allocation of power over parallel channels is solved by the classical waterfilling policy. For the discrete constellations used in practice, however, waterfilling is no longer optimal. Rather, the power allocation that maximizes the mutual information is then given by the more general mercury/waterfilling policy. This paper illustrates the usance of mercury/waterfilling on frequency-selective OFDM channels with QAM constellations and it quantifies the extend to which conventional waterfilling curtails the mutual information.","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":"116804313","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
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