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Proceedings RAWCON 2002. 2002 IEEE Radio and Wireless Conference (Cat. No.02EX573)最新文献

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Interference mitigation in WLAN networks using client-based smart antennas 基于客户端的智能天线在WLAN网络中的干扰缓解
Proceedings RAWCON 2002. 2002 IEEE Radio and Wireless Conference (Cat. No.02EX573) Pub Date : 2002-11-07 DOI: 10.1109/RAWCON.2002.1030118
E.G. Desautel, Dongsu Kim, J. Kenney, D. Kiesling
{"title":"Interference mitigation in WLAN networks using client-based smart antennas","authors":"E.G. Desautel, Dongsu Kim, J. Kenney, D. Kiesling","doi":"10.1109/RAWCON.2002.1030118","DOIUrl":"https://doi.org/10.1109/RAWCON.2002.1030118","url":null,"abstract":"This paper addresses the design and simulation of a smart antenna system for IEEE 802.11b WLAN cards. A two-element array is driven by ferroelectric phase shifters to achieve a 180/spl deg/ scanning range. The phase shifter in the beamforming network (BFN) occupies an area of less than 5.3 mm/spl times/5.7 mm. This miniature low cost BFN allows for rejection of interfering signals down to the sidelobe level if the angles of arrival differ. Simulations are conducted using the geometrically based single bounced elliptical model (GBSBEM) method. The results show that on average, up to 4 dB improvement in the C/I ratio of the received signal is achieved in sparse scattering environments (10 or less). This improvement includes the loss of the BFN. As the number of scatterers in the propagation channel increases beyond 20, the receive C/I ratio degrades to that of an isotropic antenna.","PeriodicalId":132092,"journal":{"name":"Proceedings RAWCON 2002. 2002 IEEE Radio and Wireless Conference (Cat. No.02EX573)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130394542","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
Power saving strategy for an UWB impulse radio transceiver using PCTH 基于PCTH的超宽带脉冲无线电收发机的节能策略
Proceedings RAWCON 2002. 2002 IEEE Radio and Wireless Conference (Cat. No.02EX573) Pub Date : 2002-11-07 DOI: 10.1109/RAWCON.2002.1030126
G. M. Maggio, Luca Reggiani
{"title":"Power saving strategy for an UWB impulse radio transceiver using PCTH","authors":"G. M. Maggio, Luca Reggiani","doi":"10.1109/RAWCON.2002.1030126","DOIUrl":"https://doi.org/10.1109/RAWCON.2002.1030126","url":null,"abstract":"Pseudo-chaotic time hopping (PCTH) is a recently proposed coding/modulation scheme for UWB (ultrawide band) impulse radio. PCTH exploits concepts from symbolic dynamics to generate aperiodic spreading sequences. In this paper we present a power saving strategy for a multi-access UWB system based on PCTH. It is shown that our approach leads to a significant power saving. The trade-off with respect to BER performance is also discussed.","PeriodicalId":132092,"journal":{"name":"Proceedings RAWCON 2002. 2002 IEEE Radio and Wireless Conference (Cat. No.02EX573)","volume":"628 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116180454","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 5-6 GHz fully-integrated CMOS LNA for a dual-band WLAN receiver 用于双频WLAN接收器的5-6 GHz全集成CMOS LNA
Proceedings RAWCON 2002. 2002 IEEE Radio and Wireless Conference (Cat. No.02EX573) Pub Date : 2002-11-07 DOI: 10.1109/RAWCON.2002.1030155
D. Mukherjee, J. Bhattacharjee, S. Chakraborty, J. Laskar
{"title":"A 5-6 GHz fully-integrated CMOS LNA for a dual-band WLAN receiver","authors":"D. Mukherjee, J. Bhattacharjee, S. Chakraborty, J. Laskar","doi":"10.1109/RAWCON.2002.1030155","DOIUrl":"https://doi.org/10.1109/RAWCON.2002.1030155","url":null,"abstract":"A fully-integrated LNA is presented in context of a dual-band direct-conversion receiver architecture for 5-6 GHz wireless LAN applications. Designed and fabricated in a 0.24 /spl mu/m standard digital CMOS process, the LNA exhibits a wideband 50 ohm input matching with S/sub 11/ of -23.5 dB at 5.5 GHz. The measured IIP/sub 3/ and P/sub 1dB/ are +10 dBm and -1.5 dBm respectively. It has a noise figure of 4.8 dB at 5.5 GHz. The LNA is shown to meet the requirements of a dual-band receiver architecture for the IEEE 802.11a WLAN standard.","PeriodicalId":132092,"journal":{"name":"Proceedings RAWCON 2002. 2002 IEEE Radio and Wireless Conference (Cat. No.02EX573)","volume":"480 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123056408","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
VCOOPT: a tool for VCO phase noise optimization VCOOPT: VCO相位噪声优化工具
Proceedings RAWCON 2002. 2002 IEEE Radio and Wireless Conference (Cat. No.02EX573) Pub Date : 2002-11-07 DOI: 10.1109/RAWCON.2002.1030147
V. Kratyuk, K. Mayaram
{"title":"VCOOPT: a tool for VCO phase noise optimization","authors":"V. Kratyuk, K. Mayaram","doi":"10.1109/RAWCON.2002.1030147","DOIUrl":"https://doi.org/10.1109/RAWCON.2002.1030147","url":null,"abstract":"We have implemented an optimization technique for the automated design of RF LC CMOS voltage controlled oscillators (VCO) with low phase noise given a set of specifications. The electromagnetic solver ASITIC combined with the circuit simulator SpectreRF allows optimization of the VCO circuit parameters and inductor layout. Our approach gives a phase noise improvement of up to 20 dBc/Hz in the flicker noise region and up to 5 dBc/Hz in the thermal noise region. An optimization program for the computer-aided design of on-chip spiral inductors has also been developed. This program allows the designer to obtain the layout of a required inductance value with a maximal quality factor.","PeriodicalId":132092,"journal":{"name":"Proceedings RAWCON 2002. 2002 IEEE Radio and Wireless Conference (Cat. No.02EX573)","volume":"2008 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116939772","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
On the performance of a blind source separation based I/Q-corrector 基于盲源分离的I/ q校正器性能研究
Proceedings RAWCON 2002. 2002 IEEE Radio and Wireless Conference (Cat. No.02EX573) Pub Date : 2002-11-07 DOI: 10.1109/RAWCON.2002.1030127
E. Çetin, I. Kale, R. Morling
{"title":"On the performance of a blind source separation based I/Q-corrector","authors":"E. Çetin, I. Kale, R. Morling","doi":"10.1109/RAWCON.2002.1030127","DOIUrl":"https://doi.org/10.1109/RAWCON.2002.1030127","url":null,"abstract":"I and Q channel phase and gain mismatches are of great concern in communications receiver design. We carry out a detailed performance analysis of the blind-source separation (BSS) based imbalance compensation structure. The results indicate that the BSS structure can offer adequate performance for most communication systems. Since the compensation is carried out before any modulation specific processing, the proposed compensation method works with all standard modulation formats.","PeriodicalId":132092,"journal":{"name":"Proceedings RAWCON 2002. 2002 IEEE Radio and Wireless Conference (Cat. No.02EX573)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121019431","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 class-S RF amplifier architecture with envelope delta-sigma modulation 采用包络δ - σ调制的s类射频放大器结构
Proceedings RAWCON 2002. 2002 IEEE Radio and Wireless Conference (Cat. No.02EX573) Pub Date : 2002-11-07 DOI: 10.1109/RAWCON.2002.1030146
Y. Wang
{"title":"A class-S RF amplifier architecture with envelope delta-sigma modulation","authors":"Y. Wang","doi":"10.1109/RAWCON.2002.1030146","DOIUrl":"https://doi.org/10.1109/RAWCON.2002.1030146","url":null,"abstract":"This paper proposes a new architecture to realize a class-S RF amplifier working at high carrier frequency. The existing class-S RF amplifier has the potential to achieve high efficiency while the highest RF frequency it can handle is determined by the switching speed of delta-sigma modulators. Due to the current technology limit of digital circuits, the approach is difficult to implement for amplifiers above the gigahertz frequency range. The proposed approach can overcome this difficulty by sampling the signal envelope with the delta-sigma modulator rather than the original carrier, which is more promising in practical implementation.","PeriodicalId":132092,"journal":{"name":"Proceedings RAWCON 2002. 2002 IEEE Radio and Wireless Conference (Cat. No.02EX573)","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131971788","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: 38
An integrated chip-scale active antenna for 5-6 GHz wireless microsystems 用于5-6 GHz无线微系统的集成芯片级有源天线
Proceedings RAWCON 2002. 2002 IEEE Radio and Wireless Conference (Cat. No.02EX573) Pub Date : 2002-11-07 DOI: 10.1109/RAWCON.2002.1030139
Jun Zhao, S. Raman
{"title":"An integrated chip-scale active antenna for 5-6 GHz wireless microsystems","authors":"Jun Zhao, S. Raman","doi":"10.1109/RAWCON.2002.1030139","DOIUrl":"https://doi.org/10.1109/RAWCON.2002.1030139","url":null,"abstract":"An integrated GaAs \"chip-scale\" microstrip patch antenna with matching power amplifier has been designed. The size of the antenna is /spl sim/4.2 mm /spl times/ 4.2 mm, which is /spl sim/1/13 of /spl lambda//sub 0/ at 5-6 GHz. A class A tuned MESFET power amplifier (PA) has been designed with its output matched to the antenna feed point. The antenna is fabricated on the backside of the chip through backside patterning, the PA feeds the antenna through a backside via. The structure is mounted such that the antenna faces up, and is compatible with flip-chip technology. The measurement of a passive (no PA) antenna indicates a gain of -12.7 dB on boresight at 5.64 GHz, consistent with the antenna size reduction. The measurement of the active antenna shows a gain of -4.3 dB on boresight at 5.80 GHz. The active circuitry (PA) contributes /spl sim/8.4 dB gain in the active antenna.","PeriodicalId":132092,"journal":{"name":"Proceedings RAWCON 2002. 2002 IEEE Radio and Wireless Conference (Cat. No.02EX573)","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129223083","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
A differential 2.4 GHz switched-gain CMOS LNA for 802.11b and Bluetooth 用于802.11b和蓝牙的差分2.4 GHz开关增益CMOS LNA
Proceedings RAWCON 2002. 2002 IEEE Radio and Wireless Conference (Cat. No.02EX573) Pub Date : 2002-11-07 DOI: 10.1109/RAWCON.2002.1030157
R. Point, M. Mendes, W. Foley
{"title":"A differential 2.4 GHz switched-gain CMOS LNA for 802.11b and Bluetooth","authors":"R. Point, M. Mendes, W. Foley","doi":"10.1109/RAWCON.2002.1030157","DOIUrl":"https://doi.org/10.1109/RAWCON.2002.1030157","url":null,"abstract":"This report presents a fully differential 2.4 GHz LNA with step gain control for use in IEEE 802.11b and Bluetooth systems. The LNA was fabricated using a commercial 0.25 um 1P5M mixed signal CMOS process. Measured results show a gain of 14.7 dB, noise figure of 2.88 dB and IIP3 of -0.5 dBm. A gain of -14.2 dB and IIP3 of +19 dBm were measured in the switched low gain mode, which will provide an additional 29 dB of dynamic range to a fully integrated receiver.","PeriodicalId":132092,"journal":{"name":"Proceedings RAWCON 2002. 2002 IEEE Radio and Wireless Conference (Cat. No.02EX573)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130508041","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: 24
Novel combiner for hybrid digital/RF fiber-optic application 用于数字/射频光纤混合应用的新型组合器
Proceedings RAWCON 2002. 2002 IEEE Radio and Wireless Conference (Cat. No.02EX573) Pub Date : 2002-11-07 DOI: 10.1109/RAWCON.2002.1030150
M. Maeng, K. Lim, Y. Hur, M. Davis, N. Lal, S. Yoon, J. Laskar
{"title":"Novel combiner for hybrid digital/RF fiber-optic application","authors":"M. Maeng, K. Lim, Y. Hur, M. Davis, N. Lal, S. Yoon, J. Laskar","doi":"10.1109/RAWCON.2002.1030150","DOIUrl":"https://doi.org/10.1109/RAWCON.2002.1030150","url":null,"abstract":"In this paper, a combiner for a hybrid digital/RF fiber-optic link system is designed and implemented via the multi-layer organic (MLO) process. This combiner aggregates the baseband signal (7 Gbit/s PRBS) with the modulated RF signal (14 GHz) through the vertical coupling structure. The insertion loss between the RF port and output port of the combiner is measured as 1.9 dB. Measurement results also show isolation greater than 10 dB at 7 GHz and 38 dB at 14 GHz between the baseband port and RF port. This new type of combiner can work as a key component in hybrid fiber-optic applications.","PeriodicalId":132092,"journal":{"name":"Proceedings RAWCON 2002. 2002 IEEE Radio and Wireless Conference (Cat. No.02EX573)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130533578","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
A novel compact electromagnetic bandgap (embg) structure and its application for antenna duplexer 一种新型紧凑型电磁带隙结构及其在天线双工器中的应用
Proceedings RAWCON 2002. 2002 IEEE Radio and Wireless Conference (Cat. No.02EX573) Pub Date : 2002-11-07 DOI: 10.1109/RAWCON.2002.1030120
Zhi Ning Chen, N. Yang, Yuri Yi Wang, M. Chial
{"title":"A novel compact electromagnetic bandgap (embg) structure and its application for antenna duplexer","authors":"Zhi Ning Chen, N. Yang, Yuri Yi Wang, M. Chial","doi":"10.1109/RAWCON.2002.1030120","DOIUrl":"https://doi.org/10.1109/RAWCON.2002.1030120","url":null,"abstract":"A novel two-layer electromagnetic bandgap (EMBG) structure is presented in this paper. This structure can be applied to microstrip-line structures to realise a bandstop property. Owing to its selfresonant characteristics, the proposed EMBG structure is compact enough for the applications in RF bands. As an instance, an antenna duplexer design with the proposed structure is given.","PeriodicalId":132092,"journal":{"name":"Proceedings RAWCON 2002. 2002 IEEE Radio and Wireless Conference (Cat. No.02EX573)","volume":"258 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122888842","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: 9
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