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

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An efficient MAC protocol with direction finding scheme in wireless ad hoc network using directional antenna 一种基于定向天线的无线自组网中具有测向机制的高效MAC协议
Radio and Wireless Conference, 2003. RAWCON '03. Proceedings Pub Date : 2003-09-08 DOI: 10.1109/RAWCON.2003.1227935
T. Ueda, S. Tanaka, D. Saha, S. Roy, S. Bandyopadhyay
{"title":"An efficient MAC protocol with direction finding scheme in wireless ad hoc network using directional antenna","authors":"T. Ueda, S. Tanaka, D. Saha, S. Roy, S. Bandyopadhyay","doi":"10.1109/RAWCON.2003.1227935","DOIUrl":"https://doi.org/10.1109/RAWCON.2003.1227935","url":null,"abstract":"In this paper, we propose an efficient directional MAC protocol with direction finding scheme for wireless ad hoc network. This efficient directional MAC protocol uses the receiver-oriented direction-finding scheme, where each node n periodically collects its neighborhood directional information and forms an angle-signal table (AST). Directional DATA/ACK packets are transmitted, after the omni-directional RTS/CTS which not only inform the hidden nodes of on-going communication status and but also are especially effective for the string topology in ITS (Intelligent Transportation System). This omni-directional RTS/CTS can be issued without disturbing the neighbors' on-going communication, by the utilization of DNAV (directional network allocation vector) with the angle information from AST. Simulation results in highway traffic scenarios show the performance improvements by this proposed directional MAC scheme conjunct with the equalized receiver sensitivity and receiver threshold.","PeriodicalId":177645,"journal":{"name":"Radio and Wireless Conference, 2003. RAWCON '03. Proceedings","volume":"53 19-20","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120928316","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: 13
Millimeter-wave indoor/outdoor wireless access systems and their technologies 毫米波室内/室外无线接入系统及其技术
Radio and Wireless Conference, 2003. RAWCON '03. Proceedings Pub Date : 2003-09-08 DOI: 10.1109/RAWCON.2003.1227879
H. Ogawa
{"title":"Millimeter-wave indoor/outdoor wireless access systems and their technologies","authors":"H. Ogawa","doi":"10.1109/RAWCON.2003.1227879","DOIUrl":"https://doi.org/10.1109/RAWCON.2003.1227879","url":null,"abstract":"Millimeter-wave wireless access systems which are being investigated in Communication Research Laboratory, Incorporated Administrative Agency are overviewed. The broadband millimeter-wave access systems which are fixed wireless access (FWA) systems are first discussed, and the video distribution system, vertically connected wireless link and the ad hoc system are also presented.","PeriodicalId":177645,"journal":{"name":"Radio and Wireless Conference, 2003. RAWCON '03. Proceedings","volume":"28 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":"116574628","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
A new scalable SPICE model for spiral inductors in substrate with buried layer 埋层基板中螺旋电感的可扩展SPICE模型
Radio and Wireless Conference, 2003. RAWCON '03. Proceedings Pub Date : 2003-09-08 DOI: 10.1109/RAWCON.2003.1227963
A. Ciccazzo, G. Greco, S. Rinaudo
{"title":"A new scalable SPICE model for spiral inductors in substrate with buried layer","authors":"A. Ciccazzo, G. Greco, S. Rinaudo","doi":"10.1109/RAWCON.2003.1227963","DOIUrl":"https://doi.org/10.1109/RAWCON.2003.1227963","url":null,"abstract":"In the radio frequency application field, the needs to use inductor models whose intrinsic characteristics are correctly represented on the basis of the various working frequencies often arise. Several publications have treated modeling of integrated inductors based on a more or less resistive substrate. Undoubtedly the most interesting approaches are those based on distributed models of turns synthesize as ladder network. The main disadvantage of these innovative models is their intrinsic complexity and therefore the difficulty to implement them as SPICE device models to be easily used in circuit simulation tools. Researchers have mainly focused their attention on the modeling of inductors based on CLOS substrate but there is no work on distributed inductor model made on the substrate with little resistive buried layer. At present, technologies that deal with such profiles are integrated in STMicroelectronics for analog and digital designs. In this paper, our aim is, firstly, to describe an innovative distributed inductor model integrated on substrate with buried layer and, secondly, to show an innovative automatic methodology which allows synthesizing, through an optimization procedure, a usable SPICE model based on the new model described above.","PeriodicalId":177645,"journal":{"name":"Radio and Wireless Conference, 2003. RAWCON '03. Proceedings","volume":"74 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":"129321140","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: 4
Low-complexity correlation system for timing synchronization in IEEE802.11a wireless LANs IEEE802.11a无线局域网中时序同步的低复杂度相关系统
Radio and Wireless Conference, 2003. RAWCON '03. Proceedings Pub Date : 2003-09-08 DOI: 10.1109/RAWCON.2003.1227890
Taehyeun Ha, Seongjoo Lee, J. Jim
{"title":"Low-complexity correlation system for timing synchronization in IEEE802.11a wireless LANs","authors":"Taehyeun Ha, Seongjoo Lee, J. Jim","doi":"10.1109/RAWCON.2003.1227890","DOIUrl":"https://doi.org/10.1109/RAWCON.2003.1227890","url":null,"abstract":"This paper suggests a low-complexity correlation system for frame timing synchronization in IEEE 802.11a wireless LAN systems. The proposed correlation system has been implemented by correlating the received OFDM preamble with quantized coefficients composed of {0, /spl plusmn/2/sup 0/, /spl plusmn/2/sup 1/,... 2/sup i/}, where i is an integer number. The 2/sup i/-valued coefficients enable the multiplying function in the correlation system to be simplified to single i-bit shifters. So we can design the correlation system using single-shifters instead of multiplying functions. In this paper we show that the complexity can be reduced by 90% while still maintaining a performance comparable to that of the conventional system.","PeriodicalId":177645,"journal":{"name":"Radio and Wireless Conference, 2003. RAWCON '03. Proceedings","volume":"19 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":"129214703","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
Novel microstrip-monopole-integrated ultra-wideband antenna for mobile UWB devices 用于移动超宽带设备的新型微带单极集成超宽带天线
Radio and Wireless Conference, 2003. RAWCON '03. Proceedings Pub Date : 2003-09-08 DOI: 10.1109/RAWCON.2003.1227899
Y.J. Wang, C.K. Lee, P.S. Tian, S.W. Lee
{"title":"Novel microstrip-monopole-integrated ultra-wideband antenna for mobile UWB devices","authors":"Y.J. Wang, C.K. Lee, P.S. Tian, S.W. Lee","doi":"10.1109/RAWCON.2003.1227899","DOIUrl":"https://doi.org/10.1109/RAWCON.2003.1227899","url":null,"abstract":"A small ultra-wideband antenna for mobile UWB devices has been developed theoretically and experimentally. The broadband operation of the antenna is achieved by integrating a single square-microstrip-patch with a monopole and by introducing a cylindrical-cap-loaded probe-feed and three tiny shorting-pins. This microstrip-monopole-integrated antenna is electrically easy to be integrated into printed circuit boards or plastic cases of the UWB devices, and also mechanically rigid to facilitate the reduction of the overall dimensions of the UWB devices. Sensitive to both vertically and horizontally polarized electromagnetic waves, it features a fractional bandwidth of around 1.5 with the center frequency of 6.1 GHz, which most likely satisfy the UWB frequency band requirements as proposed by the latest FCC Part15 specification. The planar dimensions of the antenna are less than 4 cm by 4 cm. The details of its design, analyses, and performance characteristics are presented and discussed.","PeriodicalId":177645,"journal":{"name":"Radio and Wireless Conference, 2003. RAWCON '03. Proceedings","volume":"4 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":"128053248","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
Design and evaluation of energy detection algorithms for IEEE 802.11a systems IEEE 802.11a系统能量检测算法的设计与评估
Radio and Wireless Conference, 2003. RAWCON '03. Proceedings Pub Date : 2003-09-08 DOI: 10.1109/RAWCON.2003.1227893
Chia-Horng Liu
{"title":"Design and evaluation of energy detection algorithms for IEEE 802.11a systems","authors":"Chia-Horng Liu","doi":"10.1109/RAWCON.2003.1227893","DOIUrl":"https://doi.org/10.1109/RAWCON.2003.1227893","url":null,"abstract":"This paper presented signal detection algorithms for IEEE 802.11a orthogonal frequency division multiplexing (OFDM) systems. Signal detection is to detect the arrival of the OFDM packets. Due to the burst transmission characteristics, a simple and robust signal detection algorithm is required for practical hardware implementation. In this paper, we designed and compared three signal detection algorithms, which were based on the short training sequence transmitted in front of each OFDM packet. Computer simulations were conducted to evaluate the performance of these three signal detection algorithms.","PeriodicalId":177645,"journal":{"name":"Radio and Wireless Conference, 2003. RAWCON '03. Proceedings","volume":"5 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":"130480869","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
The evolution of UWB technology 超宽带技术的发展
Radio and Wireless Conference, 2003. RAWCON '03. Proceedings Pub Date : 2003-09-08 DOI: 10.1109/RAWCON.2003.1227878
G. Ross
{"title":"The evolution of UWB technology","authors":"G. Ross","doi":"10.1109/RAWCON.2003.1227878","DOIUrl":"https://doi.org/10.1109/RAWCON.2003.1227878","url":null,"abstract":"This talk will review the development of time domain electromagnetics by this writer and others over more than a 40-year period and show how the work contributed to the growth of ultra-wideband (UWB) radar and communications. It will also review some of the latest advancements made in the field of communications by investigators making presentations at this UWB session at RAWCON and attempt to put their work in perspective. Additionally, some remaining problem areas will be identified.","PeriodicalId":177645,"journal":{"name":"Radio and Wireless Conference, 2003. RAWCON '03. Proceedings","volume":"1 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":"133893742","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: 4
A design of QAM modulator for multicode WCDMA 多码WCDMA QAM调制器的设计
Radio and Wireless Conference, 2003. RAWCON '03. Proceedings Pub Date : 2003-09-08 DOI: 10.1109/RAWCON.2003.1227924
Hyeong-Sook Park, Youn-Ok Park, Cheolsung Kim
{"title":"A design of QAM modulator for multicode WCDMA","authors":"Hyeong-Sook Park, Youn-Ok Park, Cheolsung Kim","doi":"10.1109/RAWCON.2003.1227924","DOIUrl":"https://doi.org/10.1109/RAWCON.2003.1227924","url":null,"abstract":"A QAM modulator using multiple four-output FIR filters based on look-up table (LUT) is proposed for downlink of wideband CDMA systems, and its functions are verified by stand-alone tests by means of the test equipment that achieves the functions of a QAM receiver system. Because a modulator employs the multicode modulation and M-QAM unlike QPSK modulation, the FIR filter for pulse shaping requires the multi-bit input word. So we propose the filter structure with multi-bit input word, which consists of multiple four-output FIR filter and bit-weighted accumulators. It is easy to extend the filter structure as increase of input bit word without higher clock frequency. We measure the spectrum of the implemented modulator by using a spectrum analyzer. Also, the demodulated signal constellation is obtained in the case of 16, 64 and 256-QAM as increase of multicode number.","PeriodicalId":177645,"journal":{"name":"Radio and Wireless Conference, 2003. RAWCON '03. Proceedings","volume":"20 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":"131220578","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 comparison of WOFDM with different coding schemes WOFDM在不同编码方案下的性能比较
Radio and Wireless Conference, 2003. RAWCON '03. Proceedings Pub Date : 2003-09-08 DOI: 10.1109/RAWCON.2003.1227892
Haxia Zhang, D. Yuan, M. Jiang, Dalei Wu
{"title":"Performance comparison of WOFDM with different coding schemes","authors":"Haxia Zhang, D. Yuan, M. Jiang, Dalei Wu","doi":"10.1109/RAWCON.2003.1227892","DOIUrl":"https://doi.org/10.1109/RAWCON.2003.1227892","url":null,"abstract":"The DFT based OFDM (DFT-OFDM) has currently drawn most of attention in the area of wireless communication. But, there is a long way to go to pursue higher bandwidth efficiency. Discrete wavelet transform have been proposed to substitute DFT, due to its higher spectral containment between subchannels, which can eliminate cyclic prefix (CP) that a must in DFT-OFDM system. In this paper, we propose turbo coded wavelet-based OFDM (TCWOFDM) and LDPC coded wavelet-based OFDM (LDPC-CWOFDM). And their BER performances are compared in different code parameter on AWGN channel. And we show that TCWOFDM performs better than LDPC-CWOFDM.","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":"131411122","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
Substrate integrated waveguide dual-mode filters for broadband wireless systems 宽带无线系统的基板集成波导双模滤波器
Radio and Wireless Conference, 2003. RAWCON '03. Proceedings Pub Date : 2003-09-08 DOI: 10.1109/RAWCON.2003.1227973
D. Deslandes, K. Wu
{"title":"Substrate integrated waveguide dual-mode filters for broadband wireless systems","authors":"D. Deslandes, K. Wu","doi":"10.1109/RAWCON.2003.1227973","DOIUrl":"https://doi.org/10.1109/RAWCON.2003.1227973","url":null,"abstract":"A planar dual-mode filter on the basis of the substrate integrated waveguide (SIW) technique has been proposed and developed. Microstrip probes are used to excite two modes in an SIW cavity. These modes cancel each other at one frequency to create a transmission zero. Parametric influences in the filter design have been studied. A 26 GHz dual-mode filter has been designed, fabricated and measured. The insertion loss of 0.5 dB is obtained at the center frequency. The return loss is lower than 15 dB.","PeriodicalId":177645,"journal":{"name":"Radio and Wireless Conference, 2003. RAWCON '03. Proceedings","volume":"53 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":"115805220","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: 44
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