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Radio and Wireless Conference, 2003. RAWCON '03. Proceedings最新文献

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A self-reconfigurable receiver architecture for software radio systems 一种用于软件无线电系统的自重构接收机体系结构
Radio and Wireless Conference, 2003. RAWCON '03. Proceedings Pub Date : 2003-09-08 DOI: 10.1109/RAWCON.2003.1227937
Henrique Miranda, P.C. Pinto, Sergio Silva
{"title":"A self-reconfigurable receiver architecture for software radio systems","authors":"Henrique Miranda, P.C. Pinto, Sergio Silva","doi":"10.1109/RAWCON.2003.1227937","DOIUrl":"https://doi.org/10.1109/RAWCON.2003.1227937","url":null,"abstract":"This paper proposes adaptive digital receiver architecture suitable for software defined radio systems. This receiver is prepared to handle modulation schemes whose symbols belong to a linear, two-dimensional signal space (such as M-PSK or M-QAM). It is capable of identifying key signal parameters (e.g., symbol rate and constellation) and in an autonomous way, modifies its operation accordingly. Four aspects of self-reconfigurable are addressed: baseband filtering, symbol synchronization, carrier synchronization and constellation recognition. The performance of the receiver is evaluated based on simulation results, and several usage scenarios for the proposed architecture are envisaged.","PeriodicalId":177645,"journal":{"name":"Radio and Wireless Conference, 2003. RAWCON '03. Proceedings","volume":"536 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116493832","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
Design and implementation of RF subsystems with multiple embedded passives in multi-layer organic substrates 多层有机衬底中多个嵌入式无源射频子系统的设计与实现
Radio and Wireless Conference, 2003. RAWCON '03. Proceedings Pub Date : 2003-09-08 DOI: 10.1109/RAWCON.2003.1227958
V. Govind, S. Dalmia, Jinseong Choi, Madhavan Swaminathan
{"title":"Design and implementation of RF subsystems with multiple embedded passives in multi-layer organic substrates","authors":"V. Govind, S. Dalmia, Jinseong Choi, Madhavan Swaminathan","doi":"10.1109/RAWCON.2003.1227958","DOIUrl":"https://doi.org/10.1109/RAWCON.2003.1227958","url":null,"abstract":"Recent development in the design of high-Q passives embedded in low cost IC packages has made single-package integration of RF front-ends feasible. This paper analyses the effects of ground return in the performance of active circuits, while using multiple embedded devices in the package. The return-current path layout has been modeled using both electromagnetic field solvers as well as a circuit-based modeling methodology based on coupled line theory. Low noise amplifiers (LNAs) using discrete and embedded components have been designed and fabricated as test vehicles, and the modeled results have been verified with measurements.","PeriodicalId":177645,"journal":{"name":"Radio and Wireless Conference, 2003. RAWCON '03. Proceedings","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116234379","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
An optimization technique for low-loss n/spl times/m microwave switch matrices 低损耗n/spl次/m微波开关矩阵的优化技术
Radio and Wireless Conference, 2003. RAWCON '03. Proceedings Pub Date : 2003-09-08 DOI: 10.1109/RAWCON.2003.1227962
K. U-yen, J. Kenney
{"title":"An optimization technique for low-loss n/spl times/m microwave switch matrices","authors":"K. U-yen, J. Kenney","doi":"10.1109/RAWCON.2003.1227962","DOIUrl":"https://doi.org/10.1109/RAWCON.2003.1227962","url":null,"abstract":"An approach to the optimum design of a large-scale blocking switch matrix has been developed. The approach minimizes insertion loss of any n/spl times/m switch matrix by deriving optimum configurations for all cascading states. Each state consists of either switches or junctions. To demonstrate an accuracy of the technique, we have designed an 8/spl times/2 switch matrix operating in the ISM band based on the optimization solution. The results indicate that the predicted insertion loss (2.90 dB) is agreed with the measured one (3.15 dB) at nominal frequency of 2.45 GHz. The agreement between the predicted and the measured insertion loss validates the practical use of the model.","PeriodicalId":177645,"journal":{"name":"Radio and Wireless Conference, 2003. RAWCON '03. Proceedings","volume":"126 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116562924","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
Wireless local positioning - concepts, solutions, applications 无线本地定位-概念，解决方案，应用
Radio and Wireless Conference, 2003. RAWCON '03. Proceedings Pub Date : 2003-09-08 DOI: 10.1109/RAWCON.2003.1227932
M. Vossiek, L. Wiebking, P. Gulden, J. Weighardt, C. Hoffmann
{"title":"Wireless local positioning - concepts, solutions, applications","authors":"M. Vossiek, L. Wiebking, P. Gulden, J. Weighardt, C. Hoffmann","doi":"10.1109/RAWCON.2003.1227932","DOIUrl":"https://doi.org/10.1109/RAWCON.2003.1227932","url":null,"abstract":"Local positioning will be one of the most exciting features of the next generation of wireless system. With this technique a mobile device can either gather the information about its position or can be localized from elsewhere. Completely new concepts and features in wireless data transmission and transponder systems is enabled by this. Self-organizing sensor networks, ubiquitous computing, location service billing, context dependent information services, tracking and guiding are only some of the numerous possible application areas. This paper gives an overview over existing wireless positioning solutions and attempts to structure different techniques and applications. Furthermore two novel positioning systems currently developed by Siemens are featured as system examples. First a neural cellular positioning system NCPS is introduced. This system is designed for positioning solutions for industrial, medical and consumer scenarios and is based on existing wireless voice and data infrastructure. Second the Siemens local positioning radar (LPR) is presented. This system is designed for cm-precision and realtime positioning in the area of industrial logistics, control and automation. The application examples are completed by an application in the field of augmented reality computing.","PeriodicalId":177645,"journal":{"name":"Radio and Wireless Conference, 2003. RAWCON '03. Proceedings","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126474880","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: 108
System performance of time division IQ-channels receiver due to transient process for digital wireless applications 数字无线中受瞬态过程影响的时分iq信道接收机系统性能
Radio and Wireless Conference, 2003. RAWCON '03. Proceedings Pub Date : 2003-09-08 DOI: 10.1109/RAWCON.2003.1227894
M. Son, O. Popov, Hoon Lee
{"title":"System performance of time division IQ-channels receiver due to transient process for digital wireless applications","authors":"M. Son, O. Popov, Hoon Lee","doi":"10.1109/RAWCON.2003.1227894","DOIUrl":"https://doi.org/10.1109/RAWCON.2003.1227894","url":null,"abstract":"In this paper, we have studied time division IQ channels receiver (TDIQR) architecture for solving IQ mismatch problem of direct conversion receiver. TDIQR having the process of I and Q signals on the same chain of receiver's RF units was an elaborated model. We analyzed the PER performance vs. noise of the wireless local area network (WLAN) system and especially the impact of transient process on the receiver.","PeriodicalId":177645,"journal":{"name":"Radio and Wireless Conference, 2003. RAWCON '03. Proceedings","volume":"91 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114878744","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
Ultra wideband ranging system using improved chirp waveform 采用改进啁啾波形的超宽带测距系统
Radio and Wireless Conference, 2003. RAWCON '03. Proceedings Pub Date : 2003-09-08 DOI: 10.1109/RAWCON.2003.1227929
K. Doi, T. Matsumura, K. Mizutani, R. Kohno
{"title":"Ultra wideband ranging system using improved chirp waveform","authors":"K. Doi, T. Matsumura, K. Mizutani, R. Kohno","doi":"10.1109/RAWCON.2003.1227929","DOIUrl":"https://doi.org/10.1109/RAWCON.2003.1227929","url":null,"abstract":"In this paper we propose a novel chirp signal for UWB radar systems instead of the conventional Gaussian monocycle. In the proposed scheme, the transmitted signal consists of a (linear) combination of chirp signals with the same time duration, but different frequency bands. The proposed technique can suppress the peak power and to accomplish the same range resolution of the conventional UWB radars. Moreover, the proposed system can achieve single user ranging error performance.","PeriodicalId":177645,"journal":{"name":"Radio and Wireless Conference, 2003. RAWCON '03. Proceedings","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114165817","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: 19
Loop controller for a feedforward amplifier minimizing the measured power signal 用于前馈放大器的环路控制器使测量的功率信号最小化
Radio and Wireless Conference, 2003. RAWCON '03. Proceedings Pub Date : 2003-09-08 DOI: 10.1109/RAWCON.2003.1227947
M. Gadringer, H. Arthaber, G. Magerl
{"title":"Loop controller for a feedforward amplifier minimizing the measured power signal","authors":"M. Gadringer, H. Arthaber, G. Magerl","doi":"10.1109/RAWCON.2003.1227947","DOIUrl":"https://doi.org/10.1109/RAWCON.2003.1227947","url":null,"abstract":"Adaptively controlled feedforward amplifiers are discussed in a large number of publications over the past years. Especially for the control of the distortion cancellation loop it was inevitable to implement a baseband-controller if the use of a pilot carrier should have been avoided. A significant deterioration of the costs of a feedforward amplifier can be achieved by using power sensors to balance all loops. This paper introduces a loop controller, which tunes the loops of a feedforward amplifier based on the power measurement of two signals within the circuit. The structure of this controller is discussed and measurement results for a 40 W GSM2+ (EDGE) power amplifier are presented.","PeriodicalId":177645,"journal":{"name":"Radio and Wireless Conference, 2003. RAWCON '03. Proceedings","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127606368","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
Low intermodulation class-F power amplifier 低互调f类功率放大器
Radio and Wireless Conference, 2003. RAWCON '03. Proceedings Pub Date : 2003-09-08 DOI: 10.1109/RAWCON.2003.1227949
M. Meyer, D. Smely, J. Leeb, G. Magerl
{"title":"Low intermodulation class-F power amplifier","authors":"M. Meyer, D. Smely, J. Leeb, G. Magerl","doi":"10.1109/RAWCON.2003.1227949","DOIUrl":"https://doi.org/10.1109/RAWCON.2003.1227949","url":null,"abstract":"In this paper the design of a low IM and efficient class-F power amplifier in the L-band is presented. To improve intermodulation and efficiency, termination of the generated 2nd harmonic frequency at the input was investigated and optimized. For optimum termination of the harmonics at the device's input and output a scaleable inductor model to realize inductors with high Q-factors and tight tolerances was developed. Based on DC and small-signal parameter characterization a nonlinear computer model was fitted. To minimize, the amplifier was realized in this film technology. Simulation results are compared to measurement results and show good agreement.","PeriodicalId":177645,"journal":{"name":"Radio and Wireless Conference, 2003. RAWCON '03. Proceedings","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126663651","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
Circularly polarized dielectric resonator antenna excited by dual microstriplines 双微带线激励圆极化介质谐振器天线
Radio and Wireless Conference, 2003. RAWCON '03. Proceedings Pub Date : 2003-09-08 DOI: 10.1109/RAWCON.2003.1227944
Y. Sung, C. Ahn, Y. Kim
{"title":"Circularly polarized dielectric resonator antenna excited by dual microstriplines","authors":"Y. Sung, C. Ahn, Y. Kim","doi":"10.1109/RAWCON.2003.1227944","DOIUrl":"https://doi.org/10.1109/RAWCON.2003.1227944","url":null,"abstract":"In this paper, a circularly polarized ring dielectric resonator antenna (DRA) excited by pair of orthogonal 50 /spl Omega/ microstripline is proposed. A quadrature hybrid coupler is used to generate a circular polarization. Because the antenna structure is printed in a single metal layer, this antenna can be easily constructed. This antenna has a low axial ratio over wide frequency band, a wide bandwidth and the maximum gain of 4.9 dBi at the frequency of 9.55 GHz.","PeriodicalId":177645,"journal":{"name":"Radio and Wireless Conference, 2003. RAWCON '03. Proceedings","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126724842","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
A reliable active scanning scheme for the IEEE 802.11 MAC layer handoff 一个可靠的主动扫描方案，用于IEEE 802.11 MAC层切换
Radio and Wireless Conference, 2003. RAWCON '03. Proceedings Pub Date : 2003-09-08 DOI: 10.1109/RAWCON.2003.1227895
W. Li, Qing-An Zeng, D. Agrawal
{"title":"A reliable active scanning scheme for the IEEE 802.11 MAC layer handoff","authors":"W. Li, Qing-An Zeng, D. Agrawal","doi":"10.1109/RAWCON.2003.1227895","DOIUrl":"https://doi.org/10.1109/RAWCON.2003.1227895","url":null,"abstract":"In the IEEE 802.11 wireless local area networks (WLANs) with fixed access points (APs), handoff occurs when a mobile station (MS) with a communication in progress changes its associated AP from one to another. It is important to minimize the handoff latency because the active communications of a MS are interrupted before the handoff completes. Such a design needs to take into consideration the high error rate of WLANs. The IEEE 802.11 medium access control (MAC) protocol recommends an active scanning mode for the handoff process. The probe delay of the active scanning may increase greatly if the probe request is lost. However, the successful transmission of the probe request is very unpredictable due to the high collision probability and the lack of any acknowledgement. In this paper, we propose a highly reliable active scanning scheme which can be implemented with the current IEEE 802.11 channel scanning procedure. It is indicated to efficiently increase the reliability of channel scanning, especially in a noisy environment, by performing the probe request loss detection and retransmission. Furthermore, the proposed scheme reduces the overall handoff latency by providing a higher priority for management frames over data frames.","PeriodicalId":177645,"journal":{"name":"Radio and Wireless Conference, 2003. RAWCON '03. Proceedings","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125683375","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: 14
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