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2006 IEEE Radio and Wireless Symposium最新文献

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RF transceivers for wireless in standard CMOS: some perspectives 标准CMOS无线射频收发器:一些观点
2006 IEEE Radio and Wireless Symposium Pub Date : 2006-04-10 DOI: 10.1109/RWS.2006.1615081
C. Conroy, B. Kim
{"title":"RF transceivers for wireless in standard CMOS: some perspectives","authors":"C. Conroy, B. Kim","doi":"10.1109/RWS.2006.1615081","DOIUrl":"https://doi.org/10.1109/RWS.2006.1615081","url":null,"abstract":"This paper reviews some of the key challenges in implementing highly integrated RF transceivers in CMOS for cellular platforms, and discusses some architectures and building blocks, in the context of CMOS technology evolution. Some examples of commercial implementations are given. Finally, some perspectives on future directions in CMOS RF integration for multiband multimode applications will be presented.","PeriodicalId":244560,"journal":{"name":"2006 IEEE Radio and Wireless Symposium","volume":"29 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":"126110927","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: 3
Simple demodulator for 802.15.4 low-cost receivers 用于802.15.4低成本接收机的简单解调器
2006 IEEE Radio and Wireless Symposium Pub Date : 2006-04-10 DOI: 10.1109/RWS.2006.1615158
N. Dehaese, S. Bourdel, H. Barthélemy, G. Bas
{"title":"Simple demodulator for 802.15.4 low-cost receivers","authors":"N. Dehaese, S. Bourdel, H. Barthélemy, G. Bas","doi":"10.1109/RWS.2006.1615158","DOIUrl":"https://doi.org/10.1109/RWS.2006.1615158","url":null,"abstract":"This paper presents a simple demodulator for 802.15.4 (ZigBee) low-cost receivers. Based on a MSK interpretation of the modulation (O-QPSK) specified by the standard, the proposed demodulator is made up of an asynchronous zero crossing detector (AZCD) and of modified matched filters to recover the transmitted data. AZCD topology is simple, low cost and low power since it is mainly built with logic gates. At the output of the detector, a bank of 16 modified matched filters is used to despread and to decode the received symbols. Simulation shows that the demodulator performances (symbol error rate) are good enough to fulfill 802.15.4 requirements. Indeed, the use of the proposed demodulator involves the design of zero-IF receiver with a noise factor (NF) lower than 16.5 dB, which is achievable in a low-cost CMOS process.","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":"126726967","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
Distortion behavior in wireless and RF MOS-based switches 无线和射频mos开关的失真行为
2006 IEEE Radio and Wireless Symposium Pub Date : 2006-04-10 DOI: 10.1109/RWS.2006.1615123
R. Caverly
{"title":"Distortion behavior in wireless and RF MOS-based switches","authors":"R. Caverly","doi":"10.1109/RWS.2006.1615123","DOIUrl":"https://doi.org/10.1109/RWS.2006.1615123","url":null,"abstract":"RF MOS devices are finding increased use in a variety of wireless systems that require a high degree of functionality, low dc power consumption and easy integration with digital technology. This paper shows the effects of device size and technology (bulk versus SOI) on MOSFET nonlinearities in RF control applications such as series and shunt-connected devices in switch and attenuator applications. A theory is advanced that is verified with distortion measurements on fabricated control devices.","PeriodicalId":244560,"journal":{"name":"2006 IEEE Radio and Wireless Symposium","volume":"264 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":"122467306","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
Nonideal effects of reconstruction filter and I/Q imbalance in digital predistortion 数字预失真中重构滤波器和I/Q不平衡的非理想影响
2006 IEEE Radio and Wireless Symposium Pub Date : 2006-04-10 DOI: 10.1109/RWS.2006.1615144
M.Y. Li, J. Deng, L. Larson, P. Asbeck
{"title":"Nonideal effects of reconstruction filter and I/Q imbalance in digital predistortion","authors":"M.Y. Li, J. Deng, L. Larson, P. Asbeck","doi":"10.1109/RWS.2006.1615144","DOIUrl":"https://doi.org/10.1109/RWS.2006.1615144","url":null,"abstract":"Digital predistortion linearization results are often degraded by nonideal factors in the transmitter chain. Among them, the gain ripple and phase delay of the analog reconstruction filter and the gain and phase imbalance of quadrature modulator are the major sources of linearizer performance degradation. The paper studies these effects and presents general guidelines for filter selection and imbalance compensation to maximize the predistortion performance.","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":"114173154","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
Differentially coupled outphasing WCDMA transmitter with inverse class F power amplifiers 带反F类功率放大器的差分耦合共相WCDMA发射机
2006 IEEE Radio and Wireless Symposium Pub Date : 2006-04-10 DOI: 10.1109/RWS.2006.1615168
W. Gerhard, R. Knoechel
{"title":"Differentially coupled outphasing WCDMA transmitter with inverse class F power amplifiers","authors":"W. Gerhard, R. Knoechel","doi":"10.1109/RWS.2006.1615168","DOIUrl":"https://doi.org/10.1109/RWS.2006.1615168","url":null,"abstract":"This paper presents design and practical implementation of an outphasing WCDMA transmitter with highly efficient inverse class F packaged LDMOS power amplifiers (PA's). Both PA's are modeled as phase-modulated voltage sources connected in series, being differentially coupled at the output. The implementation of differential coupling with voltage sources is an alternative to the conventional design. The circuit operates as theoretically predicted. A peak power of 24 W with a peak drain efficiency of 61% and for a 5 dB PAR (peak to average ratio) QPSK signal a drain efficiency of 32 % is reported. The performance of the transmitter and measurement results are presented.","PeriodicalId":244560,"journal":{"name":"2006 IEEE Radio and Wireless Symposium","volume":"26 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":"122132923","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 5-GHz band coplanar-waveguide high temperature superconducting filter employing T-form open gap 一种采用t型开隙的5ghz波段共面波导高温超导滤波器
2006 IEEE Radio and Wireless Symposium Pub Date : 2006-04-10 DOI: 10.1109/RWS.2006.1615224
D. Koizumi, K. Satoh, S. Narahashi
{"title":"A 5-GHz band coplanar-waveguide high temperature superconducting filter employing T-form open gap","authors":"D. Koizumi, K. Satoh, S. Narahashi","doi":"10.1109/RWS.2006.1615224","DOIUrl":"https://doi.org/10.1109/RWS.2006.1615224","url":null,"abstract":"This paper presents a coplanar-waveguide (CPW) high-temperature superconducting (HTS) filter that has a T-form open gap as an input/output coupling structure to reduce the fluctuation in filter characteristics caused by dimension errors originating from the manufacturing processes of the filter. Numerical and experimental investigations based on a 5-GHz band CPW HTS filter confirm that T-form structure suppresses the fluctuation to a level lower than the existing structure. The fabricated filter has a center frequency of 5.006 GHz, a 3.5% (175 MHz) equal ripple bandwidth, a 0.11-dB ripple, and a 0.11-dB average insertion loss, all measured at 60 K.","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":"122175453","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
Performance of MUSIC based multi-user CFO estimation for interleaved OFDMA uplink 基于MUSIC的OFDMA交错上行多用户CFO估计性能
2006 IEEE Radio and Wireless Symposium Pub Date : 2006-04-10 DOI: 10.1109/RWS.2006.1615173
D. Radovic
{"title":"Performance of MUSIC based multi-user CFO estimation for interleaved OFDMA uplink","authors":"D. Radovic","doi":"10.1109/RWS.2006.1615173","DOIUrl":"https://doi.org/10.1109/RWS.2006.1615173","url":null,"abstract":"To synchronize multi-user orthogonal frequency division multiplex access (OFDMA) uplink system carrier frequency offset (CFO) of each user has to be estimated. In this paper we analyze the performance of structure based CFO estimation algorithm for multi-user interleaved OFDMA uplink recently proposed in the literature. It is shown that CFO estimation error is insensitive to the user's channel type because signal structure is conserved due to the maximal frequency diversity of interleaved scheme. Some performance loss occurs in the case of inter symbol interference. It is also shown that algorithm is very robust to the near-far effect (20 dB) when there are no timing errors. Underestimation of number of CFOs (users) is possible when SNR is low. We examine a modification of the original algorithm which lowers underestimation probability with the same amount of computations.","PeriodicalId":244560,"journal":{"name":"2006 IEEE Radio and Wireless Symposium","volume":"92 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":"116265097","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
24 GHz radar front-end for FMCW and spread spectrum radar applications 用于FMCW和扩频雷达应用的24ghz雷达前端
2006 IEEE Radio and Wireless Symposium Pub Date : 2006-04-10 DOI: 10.1109/RWS.2006.1615167
Zhaolong Li, K. Wu
{"title":"24 GHz radar front-end for FMCW and spread spectrum radar applications","authors":"Zhaolong Li, K. Wu","doi":"10.1109/RWS.2006.1615167","DOIUrl":"https://doi.org/10.1109/RWS.2006.1615167","url":null,"abstract":"Two configurations of radar front-end with a multi-chip assembly for automotive applications have been studied and presented. One configuration is suitable for both FMCW radar and spread spectrum radar with the replacement of a base-band module that could be realized by a digital synthesizer; the concept \"software defined radar\" could be addressed from this prospective. The other configuration is a conventional FMCW radar setup. Commercially available MMICs and a new substrate integrated horn antenna have been used for the radar transceiver module. The functionality of the front-end has been validated by a set of laboratory radar measurements.","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":"128049192","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
Bi-directionally fed phased array antenna with variable impedance phase shifter for ISM band ISM波段双向馈电变阻抗移相器相控阵天线
2006 IEEE Radio and Wireless Symposium Pub Date : 2006-04-10 DOI: 10.1109/RWS.2006.1615165
M. Tsuji, T. Nishikawa, K. Wakino, T. Kitazawa
{"title":"Bi-directionally fed phased array antenna with variable impedance phase shifter for ISM band","authors":"M. Tsuji, T. Nishikawa, K. Wakino, T. Kitazawa","doi":"10.1109/RWS.2006.1615165","DOIUrl":"https://doi.org/10.1109/RWS.2006.1615165","url":null,"abstract":"We propose a novel phased array antenna that is fed bi-directionally from feeding points of both ends (bi-directional phased array antenna: BiPA). The BiPA works with less phase shift than mono feeding one. We use variable impedance phase shifter (VIPS) used in the BiPA. The phase shifter consists of /spl pi/-connected three variable capacitors. The directivity of the BiPA is simulated, and the calculated values are /spl plusmn/25/spl deg/ in beam angle, -11.5 dB in side lobe at 2.45 GHz with control voltage range of DC 0 to 3.5 V. The improvement to reduce the side lobe to -18.5 dB is also considered.","PeriodicalId":244560,"journal":{"name":"2006 IEEE Radio and Wireless Symposium","volume":"82 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":"126008596","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 multistandard frequency synthesizer for 5-6 GHz WLAN transceivers in 0.35 /spl mu/m BiCMOS technology 基于0.35 /spl mu/m BiCMOS技术的5-6 GHz无线局域网收发器多标准频率合成器
2006 IEEE Radio and Wireless Symposium Pub Date : 2006-04-10 DOI: 10.1109/RWS.2006.1615193
A. Boni, S. Dondi, A. Facen
{"title":"A multistandard frequency synthesizer for 5-6 GHz WLAN transceivers in 0.35 /spl mu/m BiCMOS technology","authors":"A. Boni, S. Dondi, A. Facen","doi":"10.1109/RWS.2006.1615193","DOIUrl":"https://doi.org/10.1109/RWS.2006.1615193","url":null,"abstract":"The paper discusses the design of a fully integrated 0.35 /spl mu/m BiCMOS frequency synthesizer, operating in the 4-to-5 GHz band. The circuit is suitable for wireless transceivers, providing carriers for both 802.11a (Europe and US) and HiperLAN transmission standards. Novel techniques for phase noise reduction are introduced, as well as enhanced approaches to VCO characteristics determination and frequency division circuitry.","PeriodicalId":244560,"journal":{"name":"2006 IEEE Radio and Wireless Symposium","volume":"40 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":"128200101","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
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