发布求助
文献互助 智能选刊 最新文献

2014 IEEE International Wireless Symposium (IWS 2014)最新文献

筛选
英文 中文
Solving large complex problems using a higher order basis: Parallel out-of-core integral equation solvers involving a million unknowns 使用高阶基解决大型复杂问题:涉及一百万未知数的平行核心外积分方程求解器
2014 IEEE International Wireless Symposium (IWS 2014) Pub Date : 2014-03-24 DOI: 10.1109/IEEE-IWS.2014.6864274
T. Sarkar, Y. Zhang, D. García Doñoro, H. Moon, M. Salazar-Palma, S. Ting
{"title":"Solving large complex problems using a higher order basis: Parallel out-of-core integral equation solvers involving a million unknowns","authors":"T. Sarkar, Y. Zhang, D. García Doñoro, H. Moon, M. Salazar-Palma, S. Ting","doi":"10.1109/IEEE-IWS.2014.6864274","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2014.6864274","url":null,"abstract":"The future of computational electromagnetics is CHANGING DRASTICALLY with the new generation of computer chips which are multi-core instead of single core. Previously, advancements in chip technology meant an increase in clock speed, which was typically a benefit that computational code users could enjoy. This is no longer the case. In the new roadmaps for chip manufacturers, speed has been sacrificed for improved power consumption and the direction is multi-core processors. The burden now falls on the software programmer to revamp existing codes and add new functionality to enable computational codes to run efficiently on this new generation of multi-core processors. In this paper, a new roadmap for computational code designers is provided, demonstrating how to navigate along with the chip designers through the multi-core advancements in chip design. A new parallel out-of-core solver code termed HOBBIES using the Method of Moments (MoM) and higher order functions for expansion and testing will illustrate this roadmap. The advantage of a higher order basis over a subdomain basis is a reduction in the number of unknowns. This means that with the same computer resources, a larger problem can be solved using higher order basis than using a subdomain basis. It is illustrated how to solve a million by million complex matrix equation using a parallel out-of-core solver using modest computational resources.","PeriodicalId":225547,"journal":{"name":"2014 IEEE International Wireless Symposium (IWS 2014)","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124129009","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 frequency reconfigurable patch antenna with reed switches 带簧片开关的频率可重构贴片天线
2014 IEEE International Wireless Symposium (IWS 2014) Pub Date : 2014-03-24 DOI: 10.1109/IEEE-IWS.2014.6864248
Qiang Liu, Naizhi Wang, Q. Zeng, Changying Wu, G. Wei
{"title":"A frequency reconfigurable patch antenna with reed switches","authors":"Qiang Liu, Naizhi Wang, Q. Zeng, Changying Wu, G. Wei","doi":"10.1109/IEEE-IWS.2014.6864248","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2014.6864248","url":null,"abstract":"A frequency reconfigurable patch antenna using 19 reed switches to connect the patch with the ground plane is proposed. Compared with other controlling methods, using reed switches could avoid the need of placing bias and control lines in the vicinity of the radiating elements and the attendant impacts on the antenna radiation performance. Simulated results show that the antenna can be reconfigured to operate in the frequency range from 1.7 GHz to 2.7 GHz. Two working cases of the antenna (resonate at 2.05 GHz and 2.45 GHz) are studied and presented to illustrate the feasibility of this method.","PeriodicalId":225547,"journal":{"name":"2014 IEEE International Wireless Symposium (IWS 2014)","volume":"102 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127219671","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
Circular polarized dual port annular slot antenna 圆极化双端口环形槽天线
2014 IEEE International Wireless Symposium (IWS 2014) Pub Date : 2014-03-24 DOI: 10.1109/IEEE-IWS.2014.6864272
Madhur Deo Upadhayay, M. Abegaonkar, A. Basu, S. Koul
{"title":"Circular polarized dual port annular slot antenna","authors":"Madhur Deo Upadhayay, M. Abegaonkar, A. Basu, S. Koul","doi":"10.1109/IEEE-IWS.2014.6864272","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2014.6864272","url":null,"abstract":"This paper presents the design of a dual-port dual-band circular polarized annular slot antenna, suitable to use in the feed-back path of an oscillator resulting in an active antenna configuration. The proposed antenna is designed to radiate and transmit equal amounts of power. The return loss of the proposed antenna is higher than that desired for one-port antenna application at the desired dual-band frequencies. The antenna is fabricated on one side of a Neltec substrate (εr=3.2 and thickness = 0.762 mm) and the microstrip feeding line is fabricated on the opposite side of the board. The antenna was designed to operate at WLAN bands centered at 2.4 and 5.2 GHz. The simulated and measured results show fairly good agreement. The measured return losses were found 10 dB at 2.4 GHz and 14.5 dB at 5.2 GHz while simulated return losses were 8.57 dB at 2.4 GHz and 15.2 dB at 5.2 GHz. The radiation pattern is approximately omnidirectional at both frequencies in H-plane.","PeriodicalId":225547,"journal":{"name":"2014 IEEE International Wireless Symposium (IWS 2014)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131986533","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
Advanced modeling and design of substrate integrated waveguide components 基板集成波导元件的先进建模与设计
2014 IEEE International Wireless Symposium (IWS 2014) Pub Date : 2014-03-24 DOI: 10.1109/IEEE-IWS.2014.6864265
M. Bozzi, M. Pasian, L. Perregrini
{"title":"Advanced modeling and design of substrate integrated waveguide components","authors":"M. Bozzi, M. Pasian, L. Perregrini","doi":"10.1109/IEEE-IWS.2014.6864265","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2014.6864265","url":null,"abstract":"This paper presents some recent advances in the electromagnetic modeling and design of substrate integrated waveguide (SIW) components. The modeling of losses in SIW structures is discussed in details, and a new formula for the calculation of the attenuation constant due to radiation loss is introduced. In addition, an efficient technique for the modeling of arbitrarily shaped SIW components is discussed: this technique is based on the Boundary Integral-Resonant Mode Expansion (BI-RME) method. The BI-RME method permits the direct derivation of parametric and multimodal equivalent circuit models of SIW discontinuities, which can be adopted in the fast design of SIW components and systems.","PeriodicalId":225547,"journal":{"name":"2014 IEEE International Wireless Symposium (IWS 2014)","volume":"93 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129336217","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
Design of a handheld UHF RFID quasi yagi microstrip antenna using meander line bridge frequency selective surface 手持式超高频RFID准八木微带天线曲线桥频选择面设计
2014 IEEE International Wireless Symposium (IWS 2014) Pub Date : 2014-03-24 DOI: 10.1109/IEEE-IWS.2014.6864183
Sun-Gil Kim, Joshua J. Song, Taewon Kim
{"title":"Design of a handheld UHF RFID quasi yagi microstrip antenna using meander line bridge frequency selective surface","authors":"Sun-Gil Kim, Joshua J. Song, Taewon Kim","doi":"10.1109/IEEE-IWS.2014.6864183","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2014.6864183","url":null,"abstract":"This paper presents a quasi yagi microstrip antenna which is backed by meander line bridge Frequency selective surface (MBFSS) for a handheld UHF RFID reader. Long read range handheld reader antennas have been usually packaged outside of the reader units in most cases due to the mutual coupling and environment effect. In the proposed antenna, we reduce such effects by placing MBFSS under the quasi yagi antenna, so that the antenna is packaged inside the reader module with long read range. The proposed antenna has been simulated and measured using some measurement setups. In measurement result, 4.8dBi gain, 10.2dB front-to-back ratio and VSWR<;1.5 have been obtained in 100MHz band centered around 915MHz. Return loss at the center frequency is -46.5dB.","PeriodicalId":225547,"journal":{"name":"2014 IEEE International Wireless Symposium (IWS 2014)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131127051","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
Extraction of wideband behavioral model of power amplifier with multi groups of narrow band signals 多组窄带信号下功率放大器宽带行为模型的提取
2014 IEEE International Wireless Symposium (IWS 2014) Pub Date : 2014-03-24 DOI: 10.1109/IEEE-IWS.2014.6864266
Silong Zhang, Gongzhe Su, Xiaofan Chen, Wen-hua Chen
{"title":"Extraction of wideband behavioral model of power amplifier with multi groups of narrow band signals","authors":"Silong Zhang, Gongzhe Su, Xiaofan Chen, Wen-hua Chen","doi":"10.1109/IEEE-IWS.2014.6864266","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2014.6864266","url":null,"abstract":"This paper proposes a method to extract the wideband model of power amplifiers (PAs) with narrow band signals, so that the sampling rate of the analog digital converter (ADC) can be even lower than the bandwidth of the signal. By sweeping the frequency response with narrow band signals and combining the envelopes of input and output signals, a wideband model of PA is observed. The model can be used as both wideband simulator and digital predistorter. Experiments are performed on a wideband PA. The PA is swept with 17 groups of 10M LTE signals at 30.72Msps sample rate. When verifying the wideband model with 40MHz LTE-A signal at 184.72msps, the normalized mean square error (NMSE) of the forward model is -32.77 dB. And the feedback model successfully eliminates the adjacent channel power ratio (ACPR) of PA output signal from -30.3dBc to -45.5dBc when it is stimulated with 40M LTE-A signal.","PeriodicalId":225547,"journal":{"name":"2014 IEEE International Wireless Symposium (IWS 2014)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133164823","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
Wideband microstrip-line 3-dB power divider under triple-mode resonance 三模谐振下的宽带微带线3db功率分配器
2014 IEEE International Wireless Symposium (IWS 2014) Pub Date : 2014-03-24 DOI: 10.1109/IEEE-IWS.2014.6864207
Dong Chen, Lei Zhu, Chonghu Cheng
{"title":"Wideband microstrip-line 3-dB power divider under triple-mode resonance","authors":"Dong Chen, Lei Zhu, Chonghu Cheng","doi":"10.1109/IEEE-IWS.2014.6864207","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2014.6864207","url":null,"abstract":"A novel wideband 3-dB power divider is proposed and designed under triple-mode resonance of a cross-shaped microstrip-line resonator. A 50-25Ω impedance transformer is firstly formed by directly tap-feeding this triple-mode resonator at its two different positions. The bandwidth of this impedance transformer can be properly controlled by changing the characteristic impedance of the two loaded stubs. Afterwards, a 3-dB power divider is constructed using this 50-25Ω impedance transformer as its two arms in parallel. The design parameters of the proposed power divider are analyzed and initially determined based on its equivalent ideal transmission-line model. Finally, a 3-dB power divider is designed and fabricated. Simulated results are well confirmed by experiment, showing good wideband power splitting and port-to-port isolation performance.","PeriodicalId":225547,"journal":{"name":"2014 IEEE International Wireless Symposium (IWS 2014)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124196085","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 compact differential bandpass filter with controllable common-mode transmission zero based on Coupled Cross-Shaped Resonator with short termination 基于短端接耦合十字形谐振腔的紧凑共模传输零可控差分带通滤波器
2014 IEEE International Wireless Symposium (IWS 2014) Pub Date : 2014-03-24 DOI: 10.1109/IEEE-IWS.2014.6864219
Hui Wang, K. Tam, S. Ho, Wen Wu
{"title":"A compact differential bandpass filter with controllable common-mode transmission zero based on Coupled Cross-Shaped Resonator with short termination","authors":"Hui Wang, K. Tam, S. Ho, Wen Wu","doi":"10.1109/IEEE-IWS.2014.6864219","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2014.6864219","url":null,"abstract":"A compact differential bandpass filter (BPF) based on Coupled Cross-Shaped Resonator (CCSR) with short termination is presented in this paper. The differential-mode (DM) and common-mode (CM) equivalent half circuits of proposed CCSR are given and discussed. In DM operation, a wide passband is designed from 4.0 GHz to 5.0 GHz with a fractional bandwidth (FBW) of 22% Under CM condition, controllable transmission zero is realized easily by adjusting the length of short terminated stubs. In addition, the DM responses are unaffected while the CM transmission zero is designed independently. A prototype differential BPF operated at 4.5 GHz with more than 45 dB average CM suppression in DM passband has been realized to validate the proposed concept and theory. The maximum CM rejection is as high as 52 dB due to the controllable zero. The circuit size of this filter is merely 0.12λ02, showing its compactness advantage.","PeriodicalId":225547,"journal":{"name":"2014 IEEE International Wireless Symposium (IWS 2014)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122489512","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
Multi-channel coordinated spectrum sensing strategy in multiple antennae based cognitive radio networks 基于多天线的认知无线电网络中的多通道协调频谱感知策略
2014 IEEE International Wireless Symposium (IWS 2014) Pub Date : 2014-03-24 DOI: 10.1109/IEEE-IWS.2014.6864268
Wan Yong-feng, L. Ou
{"title":"Multi-channel coordinated spectrum sensing strategy in multiple antennae based cognitive radio networks","authors":"Wan Yong-feng, L. Ou","doi":"10.1109/IEEE-IWS.2014.6864268","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2014.6864268","url":null,"abstract":"Multiple-channel cooperative spectrum sensing in cognitive radio networks (CRN) based on cognitive radios with single antenna had been widely researched. However, it should be studied more to get the optimal antenna assignment in multiple-channel coordinated spectrum sensing for multiple antennae based cognitive radio networks when multi-antenna cognitive radios can flexibly select their antennae to apply spatial diversity reception. To solve this problem, we modeled it as an optimization problem with the constraint of the maximum false alarm probability of each channel and goal of minimizing the sum of misdetection probability over all the channels, and proposed two methods, branch and bound based method and greedy based heuristic method. The former can get the optimal strategy with high complexity, while the latter can reduce complexity obviously at the price of little loss of performance of detection and achieve a good trade-off between performance of detection and complexity.","PeriodicalId":225547,"journal":{"name":"2014 IEEE International Wireless Symposium (IWS 2014)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126906606","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
DOA estimation accuracy improvement for circular array interferometer with analog phase detector and its FPGA implementation 基于模拟鉴相器的圆阵干涉仪DOA估计精度改进及其FPGA实现
2014 IEEE International Wireless Symposium (IWS 2014) Pub Date : 2014-03-24 DOI: 10.1109/IEEE-IWS.2014.6864196
Pan Yujian, Tai Ning, Huang Jingjian, Y. Naichang
{"title":"DOA estimation accuracy improvement for circular array interferometer with analog phase detector and its FPGA implementation","authors":"Pan Yujian, Tai Ning, Huang Jingjian, Y. Naichang","doi":"10.1109/IEEE-IWS.2014.6864196","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2014.6864196","url":null,"abstract":"Circular array interferometer with analog phase detector requires higher signal to noise ratio than the digital phase detection structure, which leads to lower accuracy of direction-of-arrival (DOA) estimation. T o overcome this, we proposed two kinds of methods which can work together. They are the modified phase accumulation method (MPAM) and the optimal baseline pair method (OBPM). Modified phase accumulation method solves the problem caused by phase jump near ±π in analog phase detection structure in conventional phase accumulation method (CPAM). Taking the azimuth corresponding to one certain baseline pair as reference, OBPM outputs the azimuth and elevation corresponding to the highest accurate baseline pair. Simulation results show the effectiveness and correctness of these two methods. At last, we introduced the FPGA implementation about the two methods. By taking advantage of the parallel architecture, we saved the processing time.","PeriodicalId":225547,"journal":{"name":"2014 IEEE International Wireless Symposium (IWS 2014)","volume":"22 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127065540","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
首页 上一页 下一页 尾页
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
小红书