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Performance evaluation of MIMO-WCDMA networks employing Principal Component Analysis at the reception 基于主成分分析的MIMO-WCDMA网络接收性能评估
2014 Loughborough Antennas and Propagation Conference (LAPC) Pub Date : 2014-12-29 DOI: 10.1109/LAPC.2014.6996378
P. Gkonis, A. Kapsalis, Konstantinos Zekios, D. Kaklamani, I. Venieris, M. Chrysomalis, G. Kyriakou
{"title":"Performance evaluation of MIMO-WCDMA networks employing Principal Component Analysis at the reception","authors":"P. Gkonis, A. Kapsalis, Konstantinos Zekios, D. Kaklamani, I. Venieris, M. Chrysomalis, G. Kyriakou","doi":"10.1109/LAPC.2014.6996378","DOIUrl":"https://doi.org/10.1109/LAPC.2014.6996378","url":null,"abstract":"The goal of the study presented in this paper is to investigate the performance of MIMO-WCDMA networks, where Principal Component Analysis (PCA) is employed at the reception. In this context, multipath propagation is exploited, as the individual received signals can be seen as different instances of the same physical phenomenon (i.e. transmission and reception of WCDMA sequences). As results indicate, the deployment of PCA technique in MIMO-WCDMA networks can significantly reduce the number of active channels that need to be fed back to the transmitter. In particular, for 10/20/30 active users and six multipath components, the mean number of estimated channels that are necessary for appropriate signal reception are 4.2/3.88/3.89 for a Signal to Noise Ratio equal to 6 dB.","PeriodicalId":272122,"journal":{"name":"2014 Loughborough Antennas and Propagation Conference (LAPC)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116962196","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
Phase-spacing optimization of linear microstrip antenna arrays by EM-based superposition models 基于电磁叠加模型的线性微带天线阵相间距优化
2014 Loughborough Antennas and Propagation Conference (LAPC) Pub Date : 2014-12-29 DOI: 10.1109/LAPC.2014.6996312
S. Koziel, S. Ogurtsov
{"title":"Phase-spacing optimization of linear microstrip antenna arrays by EM-based superposition models","authors":"S. Koziel, S. Ogurtsov","doi":"10.1109/LAPC.2014.6996312","DOIUrl":"https://doi.org/10.1109/LAPC.2014.6996312","url":null,"abstract":"A technique for simulation-driven optimization of phase excitation tapers and spacings for linear arrays of microstrip antennas is presented. It exploits two models of the array under design: an array factor-based model and a simulation-based surrogate model. The former produces an initial design. The latter is used for tuning of the array radiation response as well as for validation of the final design. The simulation-based model is constructed as a superposition of simulated responses of the array under design. Low computational costs are ensured by coarse-mesh simulations. Suitable correction is carried out with respect to the high-fidelity array model. This correction is iteratively performed in the optimization process. Our technique is demonstrated with radiation response synthesis of linear arrays comprising thirty two microstrip patch antennas by phase-spacing optimization.","PeriodicalId":272122,"journal":{"name":"2014 Loughborough Antennas and Propagation Conference (LAPC)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117183474","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
Experimental investigation of 3D localisation of an on-body UWB antenna using several base stations 基于多个基站的体载超宽带天线三维定位实验研究
2014 Loughborough Antennas and Propagation Conference (LAPC) Pub Date : 2014-12-29 DOI: 10.1109/LAPC.2014.6996349
Manmohan Sharma, C. Parini, A. Alomainy
{"title":"Experimental investigation of 3D localisation of an on-body UWB antenna using several base stations","authors":"Manmohan Sharma, C. Parini, A. Alomainy","doi":"10.1109/LAPC.2014.6996349","DOIUrl":"https://doi.org/10.1109/LAPC.2014.6996349","url":null,"abstract":"This paper presents an experimental study of localisation of a body mounted ultra-wideband (UWB) antenna. Several three-dimensional localisation experiments have been performed, using a miniature tapered-slot antenna mounted on the human body as a mobile station and three Vivaldi antennas as base stations, to comprehend the level of accuracy that can be achieved and assess how precisely the tiny movements of the mobile station could be resolved. Time of Arrival data fusion and peak detection techniques have been used to compute the position of the target node in terms of x, y, z cartesian coordinates. The antennas are envisioned to be employed in a pulse based time-of-flight motion tracking system, using the upper end of the UWB band. The geometry and performance of a UWB Vivaldi antenna designed for the project is also presented.","PeriodicalId":272122,"journal":{"name":"2014 Loughborough Antennas and Propagation Conference (LAPC)","volume":"106 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117258301","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
Two-dimensional transmitarray beamsteering using stacked tunable metamaterials 利用堆叠可调谐超材料的二维发射阵列波束导向
2014 Loughborough Antennas and Propagation Conference (LAPC) Pub Date : 2014-12-29 DOI: 10.1109/LAPC.2014.6996433
J. Reis, Z. Al-Daher, N. Copner, A. Hammoudeh, R. Caldeirinha, T. Fernandes
{"title":"Two-dimensional transmitarray beamsteering using stacked tunable metamaterials","authors":"J. Reis, Z. Al-Daher, N. Copner, A. Hammoudeh, R. Caldeirinha, T. Fernandes","doi":"10.1109/LAPC.2014.6996433","DOIUrl":"https://doi.org/10.1109/LAPC.2014.6996433","url":null,"abstract":"A new 2D-beamsteering antenna technique using an electronically controlled transmitarray is presented in this paper. When coupled to a conventional horn or an array patch antenna, the proposed transmitarray has the ability to steer the main lobe of the original antenna radiation pattern in both elevation and azimuth planes, with ranges up to 30° and 30°, respectively. The transmitarray is implemented using varactor-diode controlled unit-cells with bandpass filtering characteristics around 5.35 GHz. Electromagnetic simulations are presented to prove the concept.","PeriodicalId":272122,"journal":{"name":"2014 Loughborough Antennas and Propagation Conference (LAPC)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125918517","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
Sensing passive object existence within an antenna near field based on return loss 基于回波损耗的天线近场无源目标存在感
2014 Loughborough Antennas and Propagation Conference (LAPC) Pub Date : 2014-12-29 DOI: 10.1109/LAPC.2014.6996409
W. Amer, G. Tian, C. Tsimenidis
{"title":"Sensing passive object existence within an antenna near field based on return loss","authors":"W. Amer, G. Tian, C. Tsimenidis","doi":"10.1109/LAPC.2014.6996409","DOIUrl":"https://doi.org/10.1109/LAPC.2014.6996409","url":null,"abstract":"Measuring RF signal strength is crucial in many wireless applications such as spectrum sensing and localization. However signal strength is highly affected by the existence of nearby object and particularly metallic object. This paper suggests the use of change in antenna return loss caused by electromagnetic coupling with nearby object as an indicator for object existence. The antenna itself will act as sensor for nearby metallic object, therefore any distortion in received signal strength due to the object can be identified. Experiments with 2.4GHz dipole antenna is presented and verified with simulation.","PeriodicalId":272122,"journal":{"name":"2014 Loughborough Antennas and Propagation Conference (LAPC)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126955428","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
Wideband high directivity circularly polarized Fabry-Perot antenna 宽带高指向性圆极化法布里-珀罗天线
2014 Loughborough Antennas and Propagation Conference (LAPC) Pub Date : 2014-12-29 DOI: 10.1109/LAPC.2014.6996370
F. Qin, S. Gao, G. Wei, Q. Luo, Chao Gu
{"title":"Wideband high directivity circularly polarized Fabry-Perot antenna","authors":"F. Qin, S. Gao, G. Wei, Q. Luo, Chao Gu","doi":"10.1109/LAPC.2014.6996370","DOIUrl":"https://doi.org/10.1109/LAPC.2014.6996370","url":null,"abstract":"This paper presents a novel circularly polarized Fabry-Perot (CPFP) antenna which can achieve high gain and wide bandwidth simultaneously. In the proposed antenna, a wideband circularly polarized (CP) microstrip patch is employed as the feeding source and a two-layer Partially Reflective Surface (PRS) with positive reflective phase gradient is designed as a superstrate. To validate the concept, an antenna prototype at X band is developed. Simulation results show that it can achieve a peak gain of 14.98 dBi and a 3-dB gain bandwidth of 27.7% from 8.7 GHz to 11.5 GHz. Within this frequency range, the axial ratio (AR) value is below 3dB and the reflection coefficient is below -10dB.","PeriodicalId":272122,"journal":{"name":"2014 Loughborough Antennas and Propagation Conference (LAPC)","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122669655","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
Slanted-comb frequency selective surface for use in reducing specular scatter for TM polarization 用于减少TM偏振的镜面散射的斜梳频率选择表面
2014 Loughborough Antennas and Propagation Conference (LAPC) Pub Date : 2014-12-29 DOI: 10.1109/LAPC.2014.6996470
C. Davenport, J. Rigelsford
{"title":"Slanted-comb frequency selective surface for use in reducing specular scatter for TM polarization","authors":"C. Davenport, J. Rigelsford","doi":"10.1109/LAPC.2014.6996470","DOIUrl":"https://doi.org/10.1109/LAPC.2014.6996470","url":null,"abstract":"This paper describes the analysis of a slanted-comb frequency selective surface (SC-FSS) suitable for reducing the specular scatter of an incoming wave. The surface is optimized for reducing specular scatter at oblique angles of incidence. Compared to the original comb reflection FSS (CR-FSS), effective reduction in specular scatter is possible despite a large decrease in effective height, ensuring surface installation is as low profile as possible for integration into building materials and infrastructure. Frequency plots show the effect of changing the slant angle between 9 and 18 GHz.","PeriodicalId":272122,"journal":{"name":"2014 Loughborough Antennas and Propagation Conference (LAPC)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114694994","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
3D electrically small dome antenna 3D电小型圆顶天线
2014 Loughborough Antennas and Propagation Conference (LAPC) Pub Date : 2014-12-29 DOI: 10.1109/LAPC.2014.6996477
S. Mufti, A. Tennant, L. Seed
{"title":"3D electrically small dome antenna","authors":"S. Mufti, A. Tennant, L. Seed","doi":"10.1109/LAPC.2014.6996477","DOIUrl":"https://doi.org/10.1109/LAPC.2014.6996477","url":null,"abstract":"Modifications to a 3D electrically small antenna (ESA) are presented for dual-band and wide-band performance respectively. The design is based on a recently published dome antenna with conformal meanderlines and fed by a microstrip network. By modifying both the meanderlines and microstrips, the antenna is shown to have a voltage standing wave ratio (VSWR) below 3 for the primary 2.45 GHz band and a 3.5 GHz band. By altering this new feed structure, the antenna can be shown to increase the bandwidth at the 2.45 GHz band by nearly 100 MHz for VSWR equals 3. Rapid prototyping of two antenna designs was carried out using 3D additive printed substrates metalized by Damascening conductive silver ink; the manufactured antennas are scaled up to four times the size of simulations, and offer quick validations of the simulation claims.","PeriodicalId":272122,"journal":{"name":"2014 Loughborough Antennas and Propagation Conference (LAPC)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114700910","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
Straight wedge absorber geometry optimization for normal and oblique incidence 直楔吸收体几何优化的正常和斜入射
2014 Loughborough Antennas and Propagation Conference (LAPC) Pub Date : 2014-12-29 DOI: 10.1109/LAPC.2014.6996472
Laura Pometcu, A. Sharaiha, R. Benzerga, P. Pouliguen
{"title":"Straight wedge absorber geometry optimization for normal and oblique incidence","authors":"Laura Pometcu, A. Sharaiha, R. Benzerga, P. Pouliguen","doi":"10.1109/LAPC.2014.6996472","DOIUrl":"https://doi.org/10.1109/LAPC.2014.6996472","url":null,"abstract":"This paper presents a topology for improving the performance of straight wedge absorbing materials at oblique angles of incidence. The optimization process is based on a genetic algorithm and allows one to obtain a low reflection coefficient within a wide band of frequencies. We investigate the performance by comparison between the straight wedge absorber and the optimized wedge absorber. These wedge absorbers were simulated in the CST Microwaves Studio software, using a polymer foam material.","PeriodicalId":272122,"journal":{"name":"2014 Loughborough Antennas and Propagation Conference (LAPC)","volume":"109 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132037117","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: 7
Capability and manufacturability: Some considerations concerning the current status of multi-filar dielectric loaded antennas 性能与可制造性:关于多丝介质负载天线现状的一些思考
2014 Loughborough Antennas and Propagation Conference (LAPC) Pub Date : 2014-12-29 DOI: 10.1109/LAPC.2014.6996308
O. Leisten
{"title":"Capability and manufacturability: Some considerations concerning the current status of multi-filar dielectric loaded antennas","authors":"O. Leisten","doi":"10.1109/LAPC.2014.6996308","DOIUrl":"https://doi.org/10.1109/LAPC.2014.6996308","url":null,"abstract":"Dielectric-loaded multifilar-helix antennas have been established as a useful means of providing circular polarization in small body-loaded devices. They invoke the principle that resonance-fields balanced across a dielectric medium occupy less volume than they would in equivalent air-loaded antennas. It has also been shown that circular-polarization discrimination is important for accurate position determination using GNSS systems in multi-path environments such as may exist in modern cites. The paper proceeds to analyze the more general benefits of circular-polarization discrimination in respect of the spatial capacity of MIMO systems. Damping of reflections from the device, caused by body-loading, reduces radiation efficiency but has been shown to actually improve circular-polarization discrimination between antennas of this type. Circular/elliptical polarization can be seen as always resulting from superposition of sources of differing static dipole direction and phase separation. Therefore such discrimination presents an opportunity to exploit linear independence of cross-polar summations which occur in close proximity to each other. Finally the paper considers the manufacturability of such antennas and describes some advances that have been made at Maruwa Co Ltd.","PeriodicalId":272122,"journal":{"name":"2014 Loughborough Antennas and Propagation Conference (LAPC)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130023452","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
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