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

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Transmitter architecture using digital generation of RF signals 发射机结构采用数字生成射频信号
Radio and Wireless Conference, 2003. RAWCON '03. Proceedings Pub Date : 2003-09-08 DOI: 10.1109/RAWCON.2003.1227938
J. Rode, J. Hinrichs, P. Asbeck
{"title":"Transmitter architecture using digital generation of RF signals","authors":"J. Rode, J. Hinrichs, P. Asbeck","doi":"10.1109/RAWCON.2003.1227938","DOIUrl":"https://doi.org/10.1109/RAWCON.2003.1227938","url":null,"abstract":"This paper describes architecture for a CDMA RF transmitter implemented in digital CMOS. The functions of up-conversion and filtering are carried out in the digital domain. A band-pass delta-sigma modulator is used to produce a one-bit output containing the desired analog signal, which is then fed to switching-mode power amplifier. Issues for the digital logic implementation to facilitate proper modulator operation at the required high clock rates (>3.3 GHz) are discussed in detail.","PeriodicalId":177645,"journal":{"name":"Radio and Wireless Conference, 2003. RAWCON '03. Proceedings","volume":"222 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":"130493394","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
Planar type square shaped ceramic resonator filter for millimeter-wave integrated circuits 用于毫米波集成电路的平面型方形陶瓷谐振器滤波器
Radio and Wireless Conference, 2003. RAWCON '03. Proceedings Pub Date : 2003-09-08 DOI: 10.1109/RAWCON.2003.1227957
F. Kuroki, H. Shimoi, M. Yamaguchi, T. Yoneyama
{"title":"Planar type square shaped ceramic resonator filter for millimeter-wave integrated circuits","authors":"F. Kuroki, H. Shimoi, M. Yamaguchi, T. Yoneyama","doi":"10.1109/RAWCON.2003.1227957","DOIUrl":"https://doi.org/10.1109/RAWCON.2003.1227957","url":null,"abstract":"TE/sub 0n/spl delta// mode circular ceramic resonators are usually used at centimeter frequencies due to their low loss natures. However, their employment in a planar type wide-band band-pass filter in the millimeter-wave region is problematic because of the poor coupling factors between the resonators and the input/output waveguides. With this in mind, we applied square ceramic resonators to millimeter-wave band-pass filters. From theoretical and experimental investigations, it was confirmed that the coupling factor of the EH/sub 12/spl delta// mode square ceramic resonator is larger than that of circular ceramic resonators. Low-loss band-pass filters with relative bandwidths from 2.5% to 10% were designed and successfully fabricated by using the square ceramic resonators.","PeriodicalId":177645,"journal":{"name":"Radio and Wireless Conference, 2003. RAWCON '03. Proceedings","volume":"113 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120875699","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
Small dielectric-loaded antennas with filter response characteristics and low proximity effects for 3G and Bluetooth applications 小型介质负载天线，具有滤波响应特性和低接近效应，适用于3G和蓝牙应用
Radio and Wireless Conference, 2003. RAWCON '03. Proceedings Pub Date : 2003-09-08 DOI: 10.1109/RAWCON.2003.1227904
A. Wingfield, O.P. Leisten
{"title":"Small dielectric-loaded antennas with filter response characteristics and low proximity effects for 3G and Bluetooth applications","authors":"A. Wingfield, O.P. Leisten","doi":"10.1109/RAWCON.2003.1227904","DOIUrl":"https://doi.org/10.1109/RAWCON.2003.1227904","url":null,"abstract":"Handset design teams are returning to the difficulties that are imposed by frequency division duplex architectures, once a feature of first generation analogue phones, and now brought into the spectrum of 3G services as defined by the IMT-2000 specifications. As new functionality is brought into the handset, so new solutions to the receiver circuitry are required to mitigate interference. It is the objective of this paper to demonstrate how effectively a dielectric loaded bifilar helix antenna researched by Sarantel can solved these aforementioned problems. This paper describes an antenna topology that maintains a high cross-polar gain, is very small and is power efficient. The antenna boasts an alignment of electric and magnetic minima as well as a far field minimum directed towards the users head together with balanced electric field loading across a dielectric core. These attributes minimise the near-field electromagnetic energy that is offered to and dissipated in the user.","PeriodicalId":177645,"journal":{"name":"Radio and Wireless Conference, 2003. RAWCON '03. Proceedings","volume":"99 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":"134406371","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
Reducing collisions between Bluetooth piconets by orthogonal hop set partitioning 通过正交跳集划分减少蓝牙小网间的碰撞
Radio and Wireless Conference, 2003. RAWCON '03. Proceedings Pub Date : 2003-09-08 DOI: 10.1109/RAWCON.2003.1227934
Zhifeng Jiang, V. Leung, V.W.S. Wong
{"title":"Reducing collisions between Bluetooth piconets by orthogonal hop set partitioning","authors":"Zhifeng Jiang, V. Leung, V.W.S. Wong","doi":"10.1109/RAWCON.2003.1227934","DOIUrl":"https://doi.org/10.1109/RAWCON.2003.1227934","url":null,"abstract":"This paper proposes a novel orthogonal hop set partitioning (OHSP) scheme aimed at reducing the collisions between piconets at the hop level, by partitioning the original Bluetooth hop band into five orthogonal sub-hop sets. To support OHSP, an orthogonal hop set construction method and enhanced synthesizer structures are presented. In each piconet, the master randomly and independently chooses on of five orthogonal sub-hop sets, and informs its decision to all slaves within the same piconet. Simulation results show that under the best combination of sub-hop set selection, OHSP improves system throughput by more than 10% over the original Bluetooth single hop set scheme.","PeriodicalId":177645,"journal":{"name":"Radio and Wireless Conference, 2003. RAWCON '03. Proceedings","volume":"189 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":"132402010","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
Overcoming co-channel interference in TDMA systems using SOM equalizer 利用SOM均衡器克服时分多址系统中的同信道干扰
Radio and Wireless Conference, 2003. RAWCON '03. Proceedings Pub Date : 2003-09-08 DOI: 10.1109/RAWCON.2003.1227908
Jiang Li, Dongdong Li, J.A. Khoja, Q. Liang, M. Manry, V. Prabhu
{"title":"Overcoming co-channel interference in TDMA systems using SOM equalizer","authors":"Jiang Li, Dongdong Li, J.A. Khoja, Q. Liang, M. Manry, V. Prabhu","doi":"10.1109/RAWCON.2003.1227908","DOIUrl":"https://doi.org/10.1109/RAWCON.2003.1227908","url":null,"abstract":"This paper studies the co-channel interference (CCI) problem for time-division-multiple-access (TDMA) cellular mobile communication system with burst transmission. We present a method using self-organizing-map (SOM) to overcome CCI for such a system. The SOM is realized as a classification equalizer with a decision feedback adaptive filter. An extremely small number of unique words (UWs) are utilized to initialize the SOM equalizer. Simulation results show that the bit error rate (BER) of our proposed method is much better than that of the recently proposed nearest neighbor classification equalizer.","PeriodicalId":177645,"journal":{"name":"Radio and Wireless Conference, 2003. RAWCON '03. Proceedings","volume":"2 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":"132701468","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
RF-MEMS based tunable matching network 基于RF-MEMS的可调谐匹配网络
Radio and Wireless Conference, 2003. RAWCON '03. Proceedings Pub Date : 2003-09-08 DOI: 10.1109/RAWCON.2003.1227955
Q. Shen, N. S. Barker
{"title":"RF-MEMS based tunable matching network","authors":"Q. Shen, N. S. Barker","doi":"10.1109/RAWCON.2003.1227955","DOIUrl":"https://doi.org/10.1109/RAWCON.2003.1227955","url":null,"abstract":"This paper presents a tunable matching network using a double-slug tuner based on a distributed RF-MEMS transmission line (DMTL). The proposed design has a maximum voltage standing wave ratio (VSWR) of 16:1 with the number of match points ranging from 529 at 5 GHz to 1597 at 20 GHz. Simulation results are presented in the paper.","PeriodicalId":177645,"journal":{"name":"Radio and Wireless Conference, 2003. RAWCON '03. Proceedings","volume":"25 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":"116713631","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
Wideband characterization of wireless channels for smart antenna applications 用于智能天线应用的无线信道的宽带特性
Radio and Wireless Conference, 2003. RAWCON '03. Proceedings Pub Date : 2003-09-08 DOI: 10.1109/RAWCON.2003.1227903
R. Mostafa, K. Dietze, R. B. Ertel, C. Dietrich, Jeffrey H. Reed, W. Stutzman
{"title":"Wideband characterization of wireless channels for smart antenna applications","authors":"R. Mostafa, K. Dietze, R. B. Ertel, C. Dietrich, Jeffrey H. Reed, W. Stutzman","doi":"10.1109/RAWCON.2003.1227903","DOIUrl":"https://doi.org/10.1109/RAWCON.2003.1227903","url":null,"abstract":"Coherence bandwidth is an important propagation parameter that has direct impact on the design and performance of a wireless communications link contemplating performance enhancement features like smart antenna applications. This paper presents wideband characterization for indoor and outdoor-to-indoor channels and wideband vector channel measurements for an indoor environment. The results show that the coherent bandwidth of about 10 MHz associated with indoor channel can accommodate diversity operations for wideband CDMA (W-CDMA) system. In addition, a study of the envelope cross-correlation points to the feasibility of a smart antenna system. For outdoor-to-indoor channel, the coherence bandwidth indicated that some additional temporal processing would be necessary for a W-CDMA system. Existing narrowband systems, however, would suffice to use simple diversity techniques in such a channel.","PeriodicalId":177645,"journal":{"name":"Radio and Wireless Conference, 2003. RAWCON '03. Proceedings","volume":"298 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":"134275793","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
SAW-based radio sensor systems for short-range applications 短距离应用的基于电锯的无线电传感器系统
Radio and Wireless Conference, 2003. RAWCON '03. Proceedings Pub Date : 2003-09-08 DOI: 10.1109/RAWCON.2003.1227931
G. Scholl, L. Reindl, C. Ruppel, R. Weigel
{"title":"SAW-based radio sensor systems for short-range applications","authors":"G. Scholl, L. Reindl, C. Ruppel, R. Weigel","doi":"10.1109/RAWCON.2003.1227931","DOIUrl":"https://doi.org/10.1109/RAWCON.2003.1227931","url":null,"abstract":"Wireless autonomous surface acoustic wave (SAW) sensors offer highest flexibility for modern sensor systems. Because no battery or wiring is required for power-supply and communication tasks they can advantageously be employed for nearly all kinds of short-range identification and measurement applications, where the use of conventional sensors is comfortable, impossible or dangerous, e.g. on moving or rotating parts or in industrial process chambers. In the present work the basics of SAW-based radio sensor systems are reviewed and different examples out of a manifold of possible applications will be given.","PeriodicalId":177645,"journal":{"name":"Radio and Wireless Conference, 2003. RAWCON '03. Proceedings","volume":"169 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":"133253610","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: 51
A low-power low-IF DDPSK receiver in 0.35-/spl mu/m SOI CMOS technology 一种采用0.35-/spl mu/m SOI CMOS技术的低功耗低中频DDPSK接收机
Radio and Wireless Conference, 2003. RAWCON '03. Proceedings Pub Date : 2003-09-08 DOI: 10.1109/RAWCON.2003.1227916
E. Zencir, M. Yuce, T. Huang, J. Marks, N. Dogan, W. Liu, E. Arvas
{"title":"A low-power low-IF DDPSK receiver in 0.35-/spl mu/m SOI CMOS technology","authors":"E. Zencir, M. Yuce, T. Huang, J. Marks, N. Dogan, W. Liu, E. Arvas","doi":"10.1109/RAWCON.2003.1227916","DOIUrl":"https://doi.org/10.1109/RAWCON.2003.1227916","url":null,"abstract":"A low-power low-IF double differential PSK receiver is implemented in a 0.35-/spl mu/m silicon on insulator (SOI) CMOS technology. Low-power front-end allows the implementation of the receiver with minimal power consumption. The receiver operates at 435 MHz RF. RF front-end and baseband measurements show that a fully-integrated low-power low-IF receiver that tolerates large Doppler shift is feasible.","PeriodicalId":177645,"journal":{"name":"Radio and Wireless Conference, 2003. RAWCON '03. Proceedings","volume":"33 3 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":"123611462","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
An efficient hardware interleaver for 3G turbo decoding 一种高效的3G turbo解码硬件交织器
Radio and Wireless Conference, 2003. RAWCON '03. Proceedings Pub Date : 2003-09-08 DOI: 10.1109/RAWCON.2003.1227927
P. Ampadu, K. Kornegay
{"title":"An efficient hardware interleaver for 3G turbo decoding","authors":"P. Ampadu, K. Kornegay","doi":"10.1109/RAWCON.2003.1227927","DOIUrl":"https://doi.org/10.1109/RAWCON.2003.1227927","url":null,"abstract":"We describe an energy-efficient approach for VLSI implementation of the 3rd generation partnership project (3GPP) turbo coding interleaver algorithm. Unlike previous implementations, this interleaver uses a two-stage dedicated hardware datapath that exploits the iterative nature of the decoding process, to compute addresses on the fly, eliminating the overhead associated with programmable processors and precomputed address storage. By separating the interleaving process into two stages, our architecture allows the preparatory phase to be turned off during iterations, while the decoder engages only the real-time address computation phase, further reducing power consumption.","PeriodicalId":177645,"journal":{"name":"Radio and Wireless Conference, 2003. RAWCON '03. Proceedings","volume":"61 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":"123853830","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: 16
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