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IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005.最新文献

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Analysis of dipole antenna printed on thin film by using electromagnetic simulators 用电磁模拟器分析薄膜上印刷的偶极子天线
IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005. Pub Date : 2005-04-03 DOI: 10.1109/WCACEM.2005.1469533
M. Taguchi, Y. Matsunaga
{"title":"Analysis of dipole antenna printed on thin film by using electromagnetic simulators","authors":"M. Taguchi, Y. Matsunaga","doi":"10.1109/WCACEM.2005.1469533","DOIUrl":"https://doi.org/10.1109/WCACEM.2005.1469533","url":null,"abstract":"The printed dipole antenna on thin polyimide film is calculated by using WIPL-D and IE3D based on the method of moment, micro-stripes based on TLM method Its input impedance characteristics are compared with measured data and discussed.","PeriodicalId":368249,"journal":{"name":"IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005.","volume":"99 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114292653","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
Exploitation of extra diversity in UWB MB-OFDM system UWB MB-OFDM系统中额外分集的开发
IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005. Pub Date : 2005-04-03 DOI: 10.1109/WCACEM.2005.1469516
Joo Heo, K. Chang
{"title":"Exploitation of extra diversity in UWB MB-OFDM system","authors":"Joo Heo, K. Chang","doi":"10.1109/WCACEM.2005.1469516","DOIUrl":"https://doi.org/10.1109/WCACEM.2005.1469516","url":null,"abstract":"This paper describes and analyzes the performance of MB-OFDM (multi-band OFDM) UWB (ultra-wideband) system that is suggested as one of standards in IEEE 802.15 TG3a for UWB application. UWB channel model that has been contributed in IEEE 802.15 SG3a is a wideband channel model of 6 GHz bandwidth, so we modify it to have 3 subband channels that are obtained by filtering conventional UWB channel considering center frequency and bandwidth of each subband. We demonstrate performances of MB-OFDM system under the UWB channel by simulation and verify the frequency and time domain diversity gains. We also compare the performance of a proposed SFBC (space-frequency block code) MB-OFDM system with that of conventional MB-OFDM system and manifest the extra spatial diversity gain of MB-OFDM UWB system. Simulation results show SFBC MB-OFDM system outperforms conventional MB-OFDM system about 1.5 dB of E/sub b//N/sub 0/ at target BER of 10/sup -4/.","PeriodicalId":368249,"journal":{"name":"IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005.","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114693668","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 joint space-time signal detection algorithm for MIMO DS-CDMA systems with multipath fading channels 多径衰落信道MIMO - DS-CDMA系统联合空时信号检测算法
IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005. Pub Date : 2005-04-03 DOI: 10.1109/WCACEM.2005.1469532
Yung-Yi Wang, Jiunn-Tsair Chen, Yingming Lu
{"title":"The joint space-time signal detection algorithm for MIMO DS-CDMA systems with multipath fading channels","authors":"Yung-Yi Wang, Jiunn-Tsair Chen, Yingming Lu","doi":"10.1109/WCACEM.2005.1469532","DOIUrl":"https://doi.org/10.1109/WCACEM.2005.1469532","url":null,"abstract":"This paper proposes the joint space time signal detection algorithms for downlink DS-CDMA systems with multiple-input-multiple-output (MIMO) multipath wireless channels. The proposed algorithm first decomposes the multipath channel into a set of independent parallel additive white Gaussian noise (AWGN) subchannels each with the signal of the user of interest. Signal detection can then be achieved on a path-wise-combining basis. According to different multiple access interference (MAI) suppression techniques, two algorithms respectively referred to as the JST-MVDR and JST-COP are proposed.","PeriodicalId":368249,"journal":{"name":"IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005.","volume":"138 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114877890","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
Slot fed broadband dielectric resonator antenna 槽馈宽带介质谐振器天线
IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005. Pub Date : 2005-04-03 DOI: 10.1109/WCACEM.2005.1469605
Tso-Wei Li, Jwo-Shiun Sun
{"title":"Slot fed broadband dielectric resonator antenna","authors":"Tso-Wei Li, Jwo-Shiun Sun","doi":"10.1109/WCACEM.2005.1469605","DOIUrl":"https://doi.org/10.1109/WCACEM.2005.1469605","url":null,"abstract":"A slot fed dielectric resonator antenna (DRA) is investigated experimentally. Using a U-shape narrow slot (the width of slot is about 1 mm), a wideband DRA can be obtained. Because two adjacent modes can be induced simultaneously; then, the bandwidth can be enhanced by these two adjacent modes. The bandwidth of narrow U-shape wide slot reaches about 13%. By this design, the bandwidth is enhanced almost four times more than the pure slot fed dielectric resonator antenna with presented materials.","PeriodicalId":368249,"journal":{"name":"IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005.","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114879050","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
Steering broadband beamforming without pre-steering 无预转向的宽带波束成形
IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005. Pub Date : 2005-04-03 DOI: 10.1109/WCACEM.2005.1469749
M. Jahromi, L. Godara
{"title":"Steering broadband beamforming without pre-steering","authors":"M. Jahromi, L. Godara","doi":"10.1109/WCACEM.2005.1469749","DOIUrl":"https://doi.org/10.1109/WCACEM.2005.1469749","url":null,"abstract":"Steering delays are used in broadband beamformers to steer the array in the look direction. Steering delays have to be frequency independent in order to operate for broadband signals. A wide variety of true-time-delay steering techniques are used to achieve this. All of these techniques are subject to power loss, quantization errors and other problems depending upon the particular method used. This paper presents a new approach to steer a broadband beamformer without the need to employ steering delays. The approach is based on a broadband processing using discrete Fourier transform method to obtain time domain weights. This method estimates the weights of the Frost type processor with a specified frequency response in the look direction without using steering delays in front of the broadband processor. The simulation results show the performance of this method for various scenarios.","PeriodicalId":368249,"journal":{"name":"IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005.","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127173181","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
Space-polarization diversity for a 2/spl times/2 MIMO using space time block codes 使用空时分组码的2/ sp1倍/2 MIMO的空间极化分集
IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005. Pub Date : 2005-04-03 DOI: 10.1109/WCACEM.2005.1469630
N. Murad, D. Carsenat, B. Jecko
{"title":"Space-polarization diversity for a 2/spl times/2 MIMO using space time block codes","authors":"N. Murad, D. Carsenat, B. Jecko","doi":"10.1109/WCACEM.2005.1469630","DOIUrl":"https://doi.org/10.1109/WCACEM.2005.1469630","url":null,"abstract":"The paper discusses about a space-polarization diversity scheme in which various space time codes have been applied for 2/spl times/2 antennas. Based on the two branch polarization diversity system [W. Lee et al., 1972], a theoretical model is presented for analyzing the system performance under various correlation conditions. The Alamouti scheme has been applied to the space-polarization diversity scheme in order to mitigate the cross-coupling effect and the fading effect. A 8 dB gain is obtained for a BER=10/sup -6/ in our proposed scheme.","PeriodicalId":368249,"journal":{"name":"IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005.","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126942382","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: 5
The new scheme for data rate improvement in HF communication without using equalizer 提出了在不使用均衡器的情况下提高高频通信数据速率的新方案
IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005. Pub Date : 2005-04-03 DOI: 10.1109/WCACEM.2005.1469763
V. Heidari, M. H. Alavi
{"title":"The new scheme for data rate improvement in HF communication without using equalizer","authors":"V. Heidari, M. H. Alavi","doi":"10.1109/WCACEM.2005.1469763","DOIUrl":"https://doi.org/10.1109/WCACEM.2005.1469763","url":null,"abstract":"In this paper the new and improvement approach is suggested for realization of a HF receiver without using equalizer. This approach is based on implementing considerations suggested in 2000. In our approach an HF modem without using equalizer implemented which can communicate over several hundred bits per second with very low bits error rate. This improvement was obtained by changing the framing and the coding structures, which has been suggested in 2000, and by using the symbol time recovery approach, which is proposed by Zhu et al. (2003). In this paper, the symbol time recovery approach generalized for multipath fading channels. We implemented our approach on digital signal processor named TMS320F2811. Empirical results verified this new modem features.","PeriodicalId":368249,"journal":{"name":"IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005.","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126144119","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
Real time angle of arrival estimation for GSM signals GSM信号的实时到达角估计
IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005. Pub Date : 2005-04-03 DOI: 10.1109/WCACEM.2005.1469600
P. S. Wyckoff, J. Keeler
{"title":"Real time angle of arrival estimation for GSM signals","authors":"P. S. Wyckoff, J. Keeler","doi":"10.1109/WCACEM.2005.1469600","DOIUrl":"https://doi.org/10.1109/WCACEM.2005.1469600","url":null,"abstract":"An FPGA design was created to estimate the angles of arrival for GSM wireless signals in real time. Signals are received using a four element uniform linear array. A wideband IF is undersampled and individual RF channels are tuned digitally. Initially the Blackman-Tukey approach was considered, but ultimately a less complex approach was chosen since it provides suitable performance with fewer multiplication operations. The simpler approach correlates each element with the first element over time. An FFT across the correlation sums estimates the angle of arrival. Estimates are transferred to a PC for analysis and display using a USB interface. This hardware design supports expansion to sixteen elements for real time AoA estimation and beamforming.","PeriodicalId":368249,"journal":{"name":"IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005.","volume":"60 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126766940","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 highly robust and versatile finite element-boundary integral hybrid code for scattering by BOR objects 一个具有高度鲁棒性和通用性的有限元-边界积分混合计算程序
IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005. Pub Date : 2005-04-03 DOI: 10.1109/WCACEM.2005.1469676
Jianming Jin
{"title":"A highly robust and versatile finite element-boundary integral hybrid code for scattering by BOR objects","authors":"Jianming Jin","doi":"10.1109/WCACEM.2005.1469676","DOIUrl":"https://doi.org/10.1109/WCACEM.2005.1469676","url":null,"abstract":"In this paper, we present such a simulation technique that combines the finite element and boundary integral (FE-BI) methods but with a significant improvement and expansion in its capability. This technique correctly models the boundary conditions along the axis of revolution in both the finite element and boundary integral formulations and yields highly accurate solutions. Because of the decoupled computations for the finite element and boundary integral equations, the technique is very efficient as compared to the MoM, especially for BORs comprising layered or inhomogeneous materials.","PeriodicalId":368249,"journal":{"name":"IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005.","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126425046","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
Shielding effectiveness of three dimensional gratings using the periodic FDTD Technique and CPML absorbing boundary condition 利用周期时域有限差分技术和CPML吸收边界条件研究三维光栅的屏蔽效果
IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005. Pub Date : 2005-04-03 DOI: 10.1109/WCACEM.2005.1469545
J. Roden, J. P. Skinner, S. Johns
{"title":"Shielding effectiveness of three dimensional gratings using the periodic FDTD Technique and CPML absorbing boundary condition","authors":"J. Roden, J. P. Skinner, S. Johns","doi":"10.1109/WCACEM.2005.1469545","DOIUrl":"https://doi.org/10.1109/WCACEM.2005.1469545","url":null,"abstract":"This paper examines the benefits of grating thickness in regards to enhancing EMI attenuation. Analysis is performed using the FDTD technique using periodic boundary conditions along with new formulations of the CPML absorbing boundary. Furthermore, it is demonstrated that a simple waveguide below cutoff approximation provides accurate results for the normal incident plane wave case.","PeriodicalId":368249,"journal":{"name":"IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005.","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126530759","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: 5
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