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2006 IEEE Radio and Wireless Symposium最新文献

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A low power CMOS RF transmitter front-end for 2.4 GHz ZigBee applications 用于2.4 GHz ZigBee应用的低功耗CMOS RF发射器前端
2006 IEEE Radio and Wireless Symposium Pub Date : 2006-04-10 DOI: 10.1109/RWS.2006.1615090
Trung‐Kien Nguyen, Nam-Jin Oh, Seok-Kyun Han, Sang-Gug Lee
{"title":"A low power CMOS RF transmitter front-end for 2.4 GHz ZigBee applications","authors":"Trung‐Kien Nguyen, Nam-Jin Oh, Seok-Kyun Han, Sang-Gug Lee","doi":"10.1109/RWS.2006.1615090","DOIUrl":"https://doi.org/10.1109/RWS.2006.1615090","url":null,"abstract":"This paper presents a low-power transmitter front-end for 2.4 GHz ZigBee applications, in a 0.18 /spl mu/m CMOS technology. The upconversion mixer is implemented by using a passive mixer topology which dissipates no DC current and exhibits good linearity. Low-power, high-linearity driver amplifier is designed by adopting a folded cascode topology with an additional gate-source capacitor. The measurements show 12 dB conversion gain, 0 dBm output power, 11 dBm OIP3 and 30 dB LO rejection while dissipating 1.8 mA from 1.8 V supply.","PeriodicalId":244560,"journal":{"name":"2006 IEEE Radio and Wireless Symposium","volume":"46 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":"117225953","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: 11
A novel distributed voltage-controlled oscillator for wireless systems 一种新型无线系统分布式压控振荡器
2006 IEEE Radio and Wireless Symposium Pub Date : 2006-04-10 DOI: 10.1109/RWS.2006.1615185
Z. A. Shaik, P. Shastry
{"title":"A novel distributed voltage-controlled oscillator for wireless systems","authors":"Z. A. Shaik, P. Shastry","doi":"10.1109/RWS.2006.1615185","DOIUrl":"https://doi.org/10.1109/RWS.2006.1615185","url":null,"abstract":"A novel distributed voltage-controlled oscillator based on distributed amplifier topology is presented in this paper. The distributed voltage-controlled oscillator architecture proposed here is new. The oscillator tuning is achieved by changing the center frequency of a narrowband varactor tunable band-pass filter in the feedback loop. The measured tuning range of the prototype oscillator is 1.7 GHz (from .7 to 2.4 GHz). The highest measured harmonic level is 19 dB below the fundamental. The oscillator phase noise over the tuning range is approximately -116 dBc/Hz at 1 MHz offset as revealed by simulations. The design as well as simulation and measured results of the oscillator are summarized. The oscillator topology is suitable for monolithic implementation.","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":"127423829","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: 8
Computer-aided tuning of GSM base-station filters - experimental results GSM基站滤波器的计算机辅助调谐实验结果
2006 IEEE Radio and Wireless Symposium Pub Date : 2006-04-10 DOI: 10.1109/RWS.2006.1615225
D. Traina, G. Macchiarella, J. Bertelli
{"title":"Computer-aided tuning of GSM base-station filters - experimental results","authors":"D. Traina, G. Macchiarella, J. Bertelli","doi":"10.1109/RWS.2006.1615225","DOIUrl":"https://doi.org/10.1109/RWS.2006.1615225","url":null,"abstract":"This paper describes a novel technique for the computer-aided tuning of filters and duplexers employed in GSM base stations. The procedure is based on the derivation of the characteristic polynomials of the filters through a modified implementation of the Cauchy method, suitable for a subsequent synthesis of the coupling matrix associated to the measured response. The extracted coupling matrix at each step of the procedure is compared to the goal one (obtained from a perfectly tuned unit) and suitable indications are derived for the regulations of the tuning elements of the filter. An experimental example confirms the effectiveness of proposed procedure.","PeriodicalId":244560,"journal":{"name":"2006 IEEE Radio and Wireless Symposium","volume":"131 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":"130947599","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
A 2.4 GHz SiGe bipolar power amplifier with integrated diode linearizer for WLAN IEEE 802.11b/g applications 2.4 GHz SiGe双极功率放大器，集成二极管线性放大器，用于WLAN IEEE 802.11b/g应用
2006 IEEE Radio and Wireless Symposium Pub Date : 2006-04-10 DOI: 10.1109/RWS.2006.1615146
J.H. Kim, K.Y. Kim, Y.H. Park, Y. Chung, C. Park
{"title":"A 2.4 GHz SiGe bipolar power amplifier with integrated diode linearizer for WLAN IEEE 802.11b/g applications","authors":"J.H. Kim, K.Y. Kim, Y.H. Park, Y. Chung, C. Park","doi":"10.1109/RWS.2006.1615146","DOIUrl":"https://doi.org/10.1109/RWS.2006.1615146","url":null,"abstract":"A linear RF power amplifier with integrated reverse biased diode linearizer for IEEE 802.11b/g WLAN terminals is implemented with a 33 GHz-fT, 0.5-mum-SiGe bipolar technology. The proposed linearizer maintains the fixed base voltage of power stage HBTs. The power amplifier exhibits 24.5 dBm of 1-dB compression point (P1dB), with 36% of the power-added efficiency (PAE), and 17 dB of the power gain under 3.3 V power supply. The third-order IMD value is less than - 32.5 dBc at 3 dB back-off from P1dB for the frequency of 2.45 GHz. The fabricated chip size is as small as 1times0.7 mm2, including input/inter-stage matching network and all active bias circuits","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":"130286263","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
A fully integrated, automatically adjusted CMOS RF modulator for cellular applications 一个完全集成，自动调整CMOS射频调制器的蜂窝应用
2006 IEEE Radio and Wireless Symposium Pub Date : 2006-04-10 DOI: 10.1109/RWS.2006.1615220
T. Mayer, B. Neurauter, A. Springer
{"title":"A fully integrated, automatically adjusted CMOS RF modulator for cellular applications","authors":"T. Mayer, B. Neurauter, A. Springer","doi":"10.1109/RWS.2006.1615220","DOIUrl":"https://doi.org/10.1109/RWS.2006.1615220","url":null,"abstract":"This paper describes a fully integrated RF phase modulator based on a type I fractional-N phase locked loop (PLL). A digital preemphasis filter is used to extend the transfer bandwidth beyond the narrow loop bandwidth. All critical process dependent components like VCO, loop filter and charge pump are controlled and aligned fully digital to provide the necessary accuracy needed for wideband phase modulation. The VCO operates at 4 GHz, with a phase noise of -165 dBc/Hz at 20 MHz offset from the carrier. The phase modulator was implemented in a single chip GSM/GPRS transceiver as well as in a single chip GSM/EDGE polar modulator transceiver.","PeriodicalId":244560,"journal":{"name":"2006 IEEE Radio and Wireless Symposium","volume":"47 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":"122398336","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 balanced cdma2000 SiGe HBT load insensitive power amplifier 平衡cdma2000 SiGe HBT负载不敏感功率放大器
2006 IEEE Radio and Wireless Symposium Pub Date : 2006-04-10 DOI: 10.1109/RWS.2006.1615209
G. Berretta, D. Cristaudo, S. Scaccianoce
{"title":"A balanced cdma2000 SiGe HBT load insensitive power amplifier","authors":"G. Berretta, D. Cristaudo, S. Scaccianoce","doi":"10.1109/RWS.2006.1615209","DOIUrl":"https://doi.org/10.1109/RWS.2006.1615209","url":null,"abstract":"A MMIC SiGe HBT balanced power amplifier for cdma2000 is proposed. The PA delivers 28.5 dBm linear output power with an adjacent channel power ratio ACPR below -44 dBc, a PAE of 35% and a gain of 30 dB. Thanks to the balanced approach without the use of an isolator, the PA under a 4:1 VSWR load mismatch delivers 26 dBm linear output power with a 1.5 dB gain variation and a 15% current consumption increase. The PA has been realized by using a 0.25 /spl mu/m BiCMOS technology.","PeriodicalId":244560,"journal":{"name":"2006 IEEE Radio and Wireless Symposium","volume":"8 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":"122534747","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: 22
Nonlinear distortion cancellation in self-heterodyne OFDM receivers over multipath fading channels 多径衰落信道中自外差OFDM接收机的非线性失真消除
2006 IEEE Radio and Wireless Symposium Pub Date : 2006-04-10 DOI: 10.1109/RWS.2006.1615110
Jun-Seok Yang, Jong-Ho Lee, Seong-Cheol Kim
{"title":"Nonlinear distortion cancellation in self-heterodyne OFDM receivers over multipath fading channels","authors":"Jun-Seok Yang, Jong-Ho Lee, Seong-Cheol Kim","doi":"10.1109/RWS.2006.1615110","DOIUrl":"https://doi.org/10.1109/RWS.2006.1615110","url":null,"abstract":"A digital signal processing technique for canceling a nonlinear distortion is derived with an emphasis on self-heterodyne direct conversion architectures. To cancel out the nonlinear distortion arisen at the self-mixer output of a receiver, data symbols are generated and consecutively transmitted in pairs, same amplitude but out of phase with each other. After passing through the self-mixer at the receiver, two received signals are combined according to the operation of subtraction from the received signal of the first symbol to that of the second symbol. This proposed scheme leads to cancel out the nonlinear distortion in multipath propagation environments.","PeriodicalId":244560,"journal":{"name":"2006 IEEE Radio and Wireless Symposium","volume":"15 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":"121647196","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
Analysis of a self-optimizing wireless data network using autonomous mobile wireless routers 基于自主移动无线路由器的自优化无线数据网络分析
2006 IEEE Radio and Wireless Symposium Pub Date : 2006-04-10 DOI: 10.1109/RWS.2006.1615159
Jaeseok Kim, Liuqing Yang, Jenshan Lin, J. Liu
{"title":"Analysis of a self-optimizing wireless data network using autonomous mobile wireless routers","authors":"Jaeseok Kim, Liuqing Yang, Jenshan Lin, J. Liu","doi":"10.1109/RWS.2006.1615159","DOIUrl":"https://doi.org/10.1109/RWS.2006.1615159","url":null,"abstract":"A self-optimizing wireless data network that can dynamically optimize the network performance by itself is presented. The wireless data network consists of autonomous mobile wireless routers that can change their locations to optimize the connections with users. The performance improvement is demonstrated by packet-level simulations, where the packets are passing through all seven OSI layers. IEEE 802.11 wireless LAN protocol is used in the simulations. The physical layer (PHY) is modeled by transceivers operating at 2.472 GHz frequency with 1 Mbps data rate, BPSK modulation, 15 dBm transmit power, and 100 m coverage range. Different scenarios and navigation algorithms have been investigated and a navigation algorithm combining the trajectory prediction, and the modified circular Hough transform is proposed. By using the algorithm, four mobile wireless routers each has coverage range of 100 m can efficiently cover a wide area of 500 m /spl times/ 500 m. Compared to a conventional network using fixed wireless routers, the proposed network using mobile wireless routers and center of gravity navigation algorithm achieves 38% improvement in dropped packets and 40% improvement in outage time. The trajectory prediction and the modified circular Hough transform further reduce dropped packets by 40% when the mobile wireless router is moving at the same speed as the mobile users.","PeriodicalId":244560,"journal":{"name":"2006 IEEE Radio and Wireless Symposium","volume":"4 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":"127743296","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
EKF-based channel estimation and anti-jam algorithms for OSTBCs 基于ekf的ostbc信道估计与抗干扰算法
2006 IEEE Radio and Wireless Symposium Pub Date : 2006-04-10 DOI: 10.1109/RWS.2006.1615098
Chiou-Wei Tsai, R. Cagley, R. Iltis
{"title":"EKF-based channel estimation and anti-jam algorithms for OSTBCs","authors":"Chiou-Wei Tsai, R. Cagley, R. Iltis","doi":"10.1109/RWS.2006.1615098","DOIUrl":"https://doi.org/10.1109/RWS.2006.1615098","url":null,"abstract":"We present an adaptive receiver design for orthogonal space-time block codes (OSTBCs) with joint channel estimation and jammer suppression. Using an autoregressive (AR) model for the jammer, the channel coefficients and AR parameters are jointly estimated by the extended Kalman filter (EKF). A decision-feedback equalizer (DFE) decoder is then employed for OSTBCs that takes inter-symbol interference due to temporal whitening into account. A sub-optimum linear detector is also derived for the EKF-based receiver.","PeriodicalId":244560,"journal":{"name":"2006 IEEE Radio and Wireless Symposium","volume":"4 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":"128146315","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
Adaptive IP2 calibration scheme for direct-conversion receivers 直接转换接收机的自适应IP2校准方案
2006 IEEE Radio and Wireless Symposium Pub Date : 2006-04-10 DOI: 10.1109/RWS.2006.1615107
K. Dufrêne, R. Weigel
{"title":"Adaptive IP2 calibration scheme for direct-conversion receivers","authors":"K. Dufrêne, R. Weigel","doi":"10.1109/RWS.2006.1615107","DOIUrl":"https://doi.org/10.1109/RWS.2006.1615107","url":null,"abstract":"This paper presents a novel even order intermodulation distortion cancellation scheme based on adaptive digital calibration of the RF downconversion mixer. The system, designed for an on-chip implementation, utilizes a low-complexity LMS-based equalizer. Behavioral and circuit level simulations indicate the feasibility of the approach.","PeriodicalId":244560,"journal":{"name":"2006 IEEE Radio and Wireless Symposium","volume":"12 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":"133625921","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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