发布求助
文献互助 智能选刊 最新文献

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

筛选
英文 中文
A 5.8 GHz up-conversion mixer for DSRC transmitter 用于DSRC发射机的5.8 GHz上转换混频器
Radio and Wireless Conference, 2003. RAWCON '03. Proceedings Pub Date : 2003-09-08 DOI: 10.1109/RAWCON.2003.1227969
Sang-Heung Lee, Ja-yol Lee, C. Park, Seung-Yun Lee, Sang Hoon Kim, H. Bae, Jin-Yeong Kang, K. Cho
{"title":"A 5.8 GHz up-conversion mixer for DSRC transmitter","authors":"Sang-Heung Lee, Ja-yol Lee, C. Park, Seung-Yun Lee, Sang Hoon Kim, H. Bae, Jin-Yeong Kang, K. Cho","doi":"10.1109/RAWCON.2003.1227969","DOIUrl":"https://doi.org/10.1109/RAWCON.2003.1227969","url":null,"abstract":"DSRC provides high speed radio link between road side equipment and on-board equipment within the narrow communication area. In this paper, a 5.8 GHz up-conversion mixer for DSRC RF transmitter is designed and fabricated using our 0.8 /spl mu/m SiGe HBT process technology and IF/LO/RF matching, IF/LO input baluns and RF output balun are all integrated on chip. The measured performance is 3.5 dB conversion gain, -12.5 dBm output IP3, 42 dB LO to IF isolation, 38 dB LO to RF isolation, current consumption of 29 mA for 3.0 V supply voltage and the chip size of fabricated mixer is 2.7 mm /spl times/ 1.6 mm.","PeriodicalId":177645,"journal":{"name":"Radio and Wireless Conference, 2003. RAWCON '03. Proceedings","volume":"10 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":"132848178","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 low-loss high-isolation absorptive GaAs SPDT PIN switch for 24 GHz automotive applications 用于24 GHz汽车应用的低损耗高隔离吸收GaAs SPDT PIN开关
Radio and Wireless Conference, 2003. RAWCON '03. Proceedings Pub Date : 2003-09-08 DOI: 10.1109/RAWCON.2003.1227964
T. Buber, F. Kolak, N. Kınayman, J. Bennett
{"title":"A low-loss high-isolation absorptive GaAs SPDT PIN switch for 24 GHz automotive applications","authors":"T. Buber, F. Kolak, N. Kınayman, J. Bennett","doi":"10.1109/RAWCON.2003.1227964","DOIUrl":"https://doi.org/10.1109/RAWCON.2003.1227964","url":null,"abstract":"Design of a low-loss high-isolation absorptive GaAs SPDT PIN diode switch at 24 GHz is presented. The switch incorporates a total of 6 PIN diodes, i.e., 3 diodes in each arm. Two of the diodes are for high isolation purposes and the third diode provides the matched load to the isolated port. The measured insertion loss and isolation are better than 1.4 dB and 47 dB, respectively, in the frequency band 22 to 26 GHz. The input and output return losses are better than 12 dB in the same frequency band","PeriodicalId":177645,"journal":{"name":"Radio and Wireless Conference, 2003. RAWCON '03. Proceedings","volume":"151 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":"124210607","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: 17
Discrete RF power synthesis of OFDM signals with high efficiency at high peak to average power ratios 在峰值平均功率比高的情况下，高效的OFDM信号的离散射频功率合成
Radio and Wireless Conference, 2003. RAWCON '03. Proceedings Pub Date : 2003-09-08 DOI: 10.1109/RAWCON.2003.1227888
V. Vadde
{"title":"Discrete RF power synthesis of OFDM signals with high efficiency at high peak to average power ratios","authors":"V. Vadde","doi":"10.1109/RAWCON.2003.1227888","DOIUrl":"https://doi.org/10.1109/RAWCON.2003.1227888","url":null,"abstract":"OFDM signals suffer from large peak to average power ratios (PAR.) forcing the RF power amplifier (PA) to operate inefficiently in backoff modes. This problem is hard to solve, especially when the RFPA comprises a single active device. We describe a technique of power synthesis using several discretely combined devices (FET arrays) to enhance RF power efficiency while achieving high PAR, values. We show that by suitably combining phase-switched amplifiers, one can achieve comparable BER performance to normal class-A linear amplifiers. We analyze the effect of phase distortions that arise in large integrated FET arrays, and we quantify the PM-AM effects therein. Simulations in AWGN show that one can achieve BERs comparable to full-precision, linear approaches by using only 4-5 discrete RF synthesis stages in the RFPA module.","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":"122833154","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
Hybrid RAKE/multiuser receivers for UWB 用于超宽带的混合RAKE/多用户接收机
Radio and Wireless Conference, 2003. RAWCON '03. Proceedings Pub Date : 2003-09-08 DOI: 10.1109/RAWCON.2003.1227928
Qinghua Li, L. Rusch
{"title":"Hybrid RAKE/multiuser receivers for UWB","authors":"Qinghua Li, L. Rusch","doi":"10.1109/RAWCON.2003.1227928","DOIUrl":"https://doi.org/10.1109/RAWCON.2003.1227928","url":null,"abstract":"We demonstrate the effectiveness of combining multiple arm RAKE reception with adaptive minimum mean square error (MMSE) combining to combat both narrow and wide band interference in an ultra-wide-band (UWB) pulse-based spread spectrum (SS) communications system. Whether a single user SS UWB system, or a direct sequence SS code division multiple access (CDMA) UWB system, the proposed receiver offers robust suppression of a narrowband interference, in marked contrast to the RAKE only receiver. When DSSS is used with CDMA, this receiver provides much greater rejection of multiuser access interference (wideband interference), avoiding an error floor for moderate system load. RAKE reception alone exhibits an error moderate system load. RAKE reception alone exhibits an error floor even at light system load. The proposed hybrid can be considered an enhancement of RAKE reception, replacing the maximum ration combining the MMSE, or as a reduced complexity alternative to adaptive MMSE multiuser detection.","PeriodicalId":177645,"journal":{"name":"Radio and Wireless Conference, 2003. RAWCON '03. Proceedings","volume":"81 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":"123176544","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: 23
A design and fabrication of a new stacked bandpass filter using multilayer microstrip structure for wireless applications 基于多层微带结构的新型堆叠带通滤波器的设计与制造
Radio and Wireless Conference, 2003. RAWCON '03. Proceedings Pub Date : 2003-09-08 DOI: 10.1109/RAWCON.2003.1227956
A. Djaiz, T. Denidni
{"title":"A design and fabrication of a new stacked bandpass filter using multilayer microstrip structure for wireless applications","authors":"A. Djaiz, T. Denidni","doi":"10.1109/RAWCON.2003.1227956","DOIUrl":"https://doi.org/10.1109/RAWCON.2003.1227956","url":null,"abstract":"This paper presents a new microstrip multilayer configuration in order to reduce the size of the microwave bandpass filters. To validate this approach, simulations and experimental investigations were made, and a compact stacked four-pole bandpass filter was designed, implemented and tested at 2.44 GHz. The experimental and simulated results on the filter are presented and discussed, and the comparison between them indicates a fairly good agreement. By using this multilayer configuration technique in the microwave filter design, a filter size reduction of about 50% can be easily achieved, which makes these compact filters well suited for mobile handset.","PeriodicalId":177645,"journal":{"name":"Radio and Wireless Conference, 2003. RAWCON '03. Proceedings","volume":"134 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":"123454753","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 low-noise broadband SiGe mixer for 24GHz ultra-wideband automotive applications 用于24GHz超宽带汽车应用的低噪声宽带SiGe混频器
Radio and Wireless Conference, 2003. RAWCON '03. Proceedings Pub Date : 2003-09-08 DOI: 10.1109/RAWCON.2003.1227967
I. Gresham, A. Jenkins
{"title":"A low-noise broadband SiGe mixer for 24GHz ultra-wideband automotive applications","authors":"I. Gresham, A. Jenkins","doi":"10.1109/RAWCON.2003.1227967","DOIUrl":"https://doi.org/10.1109/RAWCON.2003.1227967","url":null,"abstract":"The design and measured results for a broadband, miniature active mixer for use in a direct-down conversion I/Q receiver is presented. The high instantaneous bandwidth of a short-pulse radar system requires a broadband frequency domain response. In addition, the cost constraints and thermal demands require the RF front-end of the automotive radar system to be highly integrated, and energy efficient. The mixer displays a conversion gain of over 20 dB - including the contribution of the base band output stage - over the 3 GHz-35 GHz frequency range for an IF frequency of 500 MHz and an LO drive of 0 dBm. The double-side band (DSB) noise figure of the mixer is less than 8 dB at 24 GHz. The circuit occupies less than 0.075 mm/sup 2/. The entire mixer, including biasing circuitry, requires only 22 mA from a +5 V supply.","PeriodicalId":177645,"journal":{"name":"Radio and Wireless Conference, 2003. RAWCON '03. Proceedings","volume":"14 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":"132405248","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
"Optimal-right" and "optimal-left" adaptive modes: keys to improving feedforward amplifier power efficiency “最优右”和“最优左”自适应模式:提高前馈放大器功率效率的关键
Radio and Wireless Conference, 2003. RAWCON '03. Proceedings Pub Date : 2003-08-10 DOI: 10.1109/RAWCON.2003.1227978
C. Larose
{"title":"\"Optimal-right\" and \"optimal-left\" adaptive modes: keys to improving feedforward amplifier power efficiency","authors":"C. Larose","doi":"10.1109/RAWCON.2003.1227978","DOIUrl":"https://doi.org/10.1109/RAWCON.2003.1227978","url":null,"abstract":"Two present realities in cellular base stations are communication signals of high peak-to-average ratio and the use of class AB main amplifiers in feedforward systems. The conjunction of these two factors brings out the advantages of two new modes of adaptation of the feedforward amplifier, of which optimal-right adaptation has already been reported. The superior optimal-left adaptation, here reported for the first time, decreases the drive level of the main amplifier's own intermodulation distortion increases, it is made to correlate almost perfectly with the circuit's input signal. In either case, the improved linearization performance allows a more power-efficient feedforward amplifier to be designed for a given output linearity.","PeriodicalId":177645,"journal":{"name":"Radio and Wireless Conference, 2003. RAWCON '03. Proceedings","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121440283","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
Multiple access in ultra-wideband communications using multiple pulses and the use of least squares filters 使用多脉冲和使用最小二乘滤波器的超宽带通信中的多址访问
Radio and Wireless Conference, 2003. RAWCON '03. Proceedings Pub Date : 2003-04-11 DOI: 10.1109/RAWCON.2003.1227930
F. Dowla, F. Nekoogar
{"title":"Multiple access in ultra-wideband communications using multiple pulses and the use of least squares filters","authors":"F. Dowla, F. Nekoogar","doi":"10.1109/RAWCON.2003.1227930","DOIUrl":"https://doi.org/10.1109/RAWCON.2003.1227930","url":null,"abstract":"Multiple access (MA) in UWB communication has recently been studied in the context of multiple transmitted-reference short duration chirp pulses in the presence of additive white Gaussian noise (AWGN). The transmitted-reference (TR) receiver was extended in previous studies using multiple orthogonal pulses. Improved performance was observed in simulations by sampling the receiver autocorrelation function (ACF) at both zero- and non-zero lags. Sampling of non-zero ACF lags of orthogonal pulses is a novel approach. Method of using least squares filtering techniques for further tolerance against noise and interference for the TR method is proposed.","PeriodicalId":177645,"journal":{"name":"Radio and Wireless Conference, 2003. RAWCON '03. Proceedings","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132349732","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: 20
Proceedings 2003 Radio Wireless. RAWCON Conference (Cat. No.03TH8694) 2003无线电通讯。RAWCON会议(Cat)No.03TH8694)
Radio and Wireless Conference, 2003. RAWCON '03. Proceedings Pub Date : 1900-01-01 DOI: 10.1109/RAWCON.2003.1227877
{"title":"Proceedings 2003 Radio Wireless. RAWCON Conference (Cat. No.03TH8694)","authors":"","doi":"10.1109/RAWCON.2003.1227877","DOIUrl":"https://doi.org/10.1109/RAWCON.2003.1227877","url":null,"abstract":"The following topics are dealt with: broadband technologies; millimeter-wave technologies; wireless system architecture; WLAN system design; interference control; receiver techniques; advanced antenna technology; advanced receiver design; MIMO antenna systems; mobile communication system design; ultra wideband systems; wireless sensor networks; ad hoc networks; RF integrated circuits and front-end modules; filter technology; frequency selective devices; and power amplification circuits.","PeriodicalId":177645,"journal":{"name":"Radio and Wireless Conference, 2003. RAWCON '03. Proceedings","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127825095","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
Joint compensation of IQ imbalance and frequency offset in OFDM systems OFDM系统中IQ不平衡与频率偏移的联合补偿
Radio and Wireless Conference, 2003. RAWCON '03. Proceedings Pub Date : 1900-01-01 DOI: 10.1109/RAWCON.2003.1227887
J. Tubbax, B. Come, L. Van der Perre, S. Donnay, M. Engels, M. Moonen, H. de Man
{"title":"Joint compensation of IQ imbalance and frequency offset in OFDM systems","authors":"J. Tubbax, B. Come, L. Van der Perre, S. Donnay, M. Engels, M. Moonen, H. de Man","doi":"10.1109/RAWCON.2003.1227887","DOIUrl":"https://doi.org/10.1109/RAWCON.2003.1227887","url":null,"abstract":"Zero-IF receivers are gaining interest because of their potential to enable low-cost OFDM terminals. However, zero-IF receivers introduce IQ imbalance which may have a huge impact on the performance. Rather than increasing design time or component cost to decrease the IQ unbalance, an alternative is to tolerate the IQ imbalance and compensate it digitally. Current solutions require extra analog hardware or converge too slowly for bursty communication. Moreover, the tremendous impact of a frequency offset on the IQ estimation/compensation problem is not considered. In this paper, we analyze the joint IQ imbalance-frequency offset estimation and propose a low-cost, highly effective, all-digital compensation scheme. For large IQ imbalance (/spl isin/ = 10%, /spl Delta//spl phi/ = 10/spl deg/) and large frequency offsets, our solution results in an average implementation loss below 0.5 dB. It therefore enables the design of low-cost, low-complexity OFDM receivers.","PeriodicalId":177645,"journal":{"name":"Radio and Wireless Conference, 2003. RAWCON '03. Proceedings","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127245873","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: 55
首页 上一页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：604180095
Book学术官方微信