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Realizing non-Foster reactances using negative-group-delay networks and applications to antennas 利用负群延迟网络实现非福斯特电抗及其天线应用
2014 IEEE Radio and Wireless Symposium (RWS) Pub Date : 2014-06-12 DOI: 10.1109/RWS.2014.6830144
H. Mirzaei, G. Eleftheriades
{"title":"Realizing non-Foster reactances using negative-group-delay networks and applications to antennas","authors":"H. Mirzaei, G. Eleftheriades","doi":"10.1109/RWS.2014.6830144","DOIUrl":"https://doi.org/10.1109/RWS.2014.6830144","url":null,"abstract":"Non-Foster reactive elements such as negative capacitors and negative inductors hold promise for a number of important applications such as broadband small antennas (beyond the Chu limit), broadband matching networks (beyond the Bode-Fano limit) and squint-free series-fed and leaky-wave antennas. Traditionally, negative capacitors and inductors have been implemented using negative-impedance converters (NICs) and negative-impedance inverters (NIIs). However, these NIC and NII circuits are prone to instabilities and excessive noise. In this article, we highlight a new perspective in realizing non-Foster reactive elements using negative-group-delay (NGD) networks. The underlying NGD networks are completely passive and thus stable. However, NGD are associated with some kind of loss (resistive or reflective) which can be compensated using amplifiers. The stable operation of these elements can lead to interesting antenna applications discussed in this paper.","PeriodicalId":247495,"journal":{"name":"2014 IEEE Radio and Wireless Symposium (RWS)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114613672","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
Semi-blind interference alignment over correlated wireless channels 相关无线信道上的半盲干扰对准
2014 IEEE Radio and Wireless Symposium (RWS) Pub Date : 2014-06-12 DOI: 10.1109/RWS.2014.6830100
Manato Takai, K. Ishibashi, T. Wada
{"title":"Semi-blind interference alignment over correlated wireless channels","authors":"Manato Takai, K. Ishibashi, T. Wada","doi":"10.1109/RWS.2014.6830100","DOIUrl":"https://doi.org/10.1109/RWS.2014.6830100","url":null,"abstract":"Semi-blind interference alignment (S-BIA) is a recently proposed interference cancellation technique on multiuser channels. S-BIA aligns interference signals with a given signal space by controlling transmit weights based on partial knowledge of channel coefficients. In this paper, we mathematically analyze the impact of channel correlation and numerically show that S-BIA is more robust against the channel correlation than ordinary multiple-input multiple-output (MIMO) systems.","PeriodicalId":247495,"journal":{"name":"2014 IEEE Radio and Wireless Symposium (RWS)","volume":"105 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130823926","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
10 Gbps outdoor mobile communication experiment employing CoMP in 11 GHz band 采用CoMP在11ghz频段进行10gbps室外移动通信实验
2014 IEEE Radio and Wireless Symposium (RWS) Pub Date : 2014-06-12 DOI: 10.1109/RWS.2014.6830114
Mitsuru Takahashi, S. Suyama, H. Suzuki, K. Fukawa
{"title":"10 Gbps outdoor mobile communication experiment employing CoMP in 11 GHz band","authors":"Mitsuru Takahashi, S. Suyama, H. Suzuki, K. Fukawa","doi":"10.1109/RWS.2014.6830114","DOIUrl":"https://doi.org/10.1109/RWS.2014.6830114","url":null,"abstract":"Super high bit rate mobile communications over 10 Gbps have been studied, and in order to verify the feasibility of the super high bit rate, 11 GHz band 10 Gbps 8×16 MIMO-OFDM experimental system that uses 400 MHz bandwidth has been developed. This paper investigates suitable system configuration for an 11 GHz band super high bit rate mobile communication employing coordinated multipoint (CoMP) transmission and reception. Specifically, in addition to a base station (BS) with low-height antennas for a pico cell, a BS with relatively high-height antennas for a micro cell is employed to cause multipath propagation, which aims to enhance the effect of CoMP. In order to evaluate the effectiveness of the system configuration, an outdoor transmission experiment is conducted. A mobile station with eight transmit antennas spatially multiplexes OFDM signals, and two BSs with eight receive antennas perform the CoMP reception. It is shown that the system configuration can expand the coverage area of throughput over 10 Gbps compared with 8×16 MIMO transmission with one BS.","PeriodicalId":247495,"journal":{"name":"2014 IEEE Radio and Wireless Symposium (RWS)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121900457","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
Antenna integration for SiP systems 用于SiP系统的天线集成
2014 IEEE Radio and Wireless Symposium (RWS) Pub Date : 2014-06-12 DOI: 10.1109/RWS.2014.6830146
W. Raedt, S. Brebels
{"title":"Antenna integration for SiP systems","authors":"W. Raedt, S. Brebels","doi":"10.1109/RWS.2014.6830146","DOIUrl":"https://doi.org/10.1109/RWS.2014.6830146","url":null,"abstract":"New data communication applications are creating large numbers of new wireless devices with continuously more stringent requirements: smaller size, weight, higher frequencies and bandwidth and lower power consumption at an ever-decreasing cost. True RF systems-on-a-chip (SoC) remain however very difficult to realise since many passive components and particularly the antenna cannot be integrated in a cost effective way with sufficient quality or size on the same Si-die. Therefore, a systems-in-a-package (SiP) approach is required. In this overview paper several technology choices of integrated antennas for wireless systems ranging from microwave to mm-wave frequencies are discussed through integration examples of various wireless modules.","PeriodicalId":247495,"journal":{"name":"2014 IEEE Radio and Wireless Symposium (RWS)","volume":"125 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122644091","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
Exploiting hidden Markov models in identifying passive UHF RFID tags 利用隐马尔可夫模型识别无源超高频RFID标签
2014 IEEE Radio and Wireless Symposium (RWS) Pub Date : 2014-06-12 DOI: 10.1109/RWS.2014.6830119
B. Alsaify, D. Thompson, J. Di
{"title":"Exploiting hidden Markov models in identifying passive UHF RFID tags","authors":"B. Alsaify, D. Thompson, J. Di","doi":"10.1109/RWS.2014.6830119","DOIUrl":"https://doi.org/10.1109/RWS.2014.6830119","url":null,"abstract":"In this work, we identify RIFD tags using hidden Markov models. By isolating the tag's transmission, we differentiate tags by their acquired transmissions. The results acquired from experimenting with hidden Markov models show that the system's performance will improve when different observations are combined together. The proposed system yielded an accuracy of 97.67% when identifying a tag's manufacturer and an accuracy of 98.04% when identifying individual tags.","PeriodicalId":247495,"journal":{"name":"2014 IEEE Radio and Wireless Symposium (RWS)","volume":"311 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132568613","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
Indoor localization based on feed-forward Neural Networks and CIR fingerprinting techniques 基于前馈神经网络和CIR指纹识别技术的室内定位
2014 IEEE Radio and Wireless Symposium (RWS) Pub Date : 2014-06-12 DOI: 10.1109/RWS.2014.6830093
R. Zouari, R. Zayani, R. Bouallègue
{"title":"Indoor localization based on feed-forward Neural Networks and CIR fingerprinting techniques","authors":"R. Zouari, R. Zayani, R. Bouallègue","doi":"10.1109/RWS.2014.6830093","DOIUrl":"https://doi.org/10.1109/RWS.2014.6830093","url":null,"abstract":"Many solutions to accurate localization in indoor environments are based on the combination of Channel Impulse Response (CIR), as fingerprinting, and Neural Networks (NN) technique. Suitable there is no theory to indicate the neural network structure for a given problem. It must be done only experimentally. Then, this paper aims to identify the neural network structure and the accompanied algorithm which are suitable for indoor localization. For this purpose, different NN structures accompanied with various algorithms are compared and discussed in order to identify the most appropriate.","PeriodicalId":247495,"journal":{"name":"2014 IEEE Radio and Wireless Symposium (RWS)","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134456685","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
Enhancing open loop beamsteering performance for the uplink of UMTS/HSPA+ under Discontinuous Transmission 非连续传输条件下UMTS/HSPA+上行链路开环波束引导性能的提高
2014 IEEE Radio and Wireless Symposium (RWS) Pub Date : 2014-06-12 DOI: 10.1109/RWS.2014.6830142
S. Schroeter, S. Riess, R. Weigel, G. Fischer
{"title":"Enhancing open loop beamsteering performance for the uplink of UMTS/HSPA+ under Discontinuous Transmission","authors":"S. Schroeter, S. Riess, R. Weigel, G. Fischer","doi":"10.1109/RWS.2014.6830142","DOIUrl":"https://doi.org/10.1109/RWS.2014.6830142","url":null,"abstract":"So called open loop transmit diversity algorithms for the uplink of UMTS use the power control commands as feedback to iteratively determine the antenna weights. The algorithms presented in literature so far are designed for continuous transmission. The UMTS standard, however, also allows discontinuous uplink transmission (DTX), which impairs the performance of these algorithms. This paper studies these impairments and proposes a method to design transmit diversity algorithms with improved performance in a DTX scenario. With such improved algorithms, the transmit power gain is 1.4 dB in DTX, which is an improvement of 0.7 dB over conventional non-DTX diversity algorithms.","PeriodicalId":247495,"journal":{"name":"2014 IEEE Radio and Wireless Symposium (RWS)","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132149820","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
Recent results of high-resolution wireless indoor positioning based on IEEE 802.11ac 基于IEEE 802.11ac的高分辨率无线室内定位的最新研究成果
2014 IEEE Radio and Wireless Symposium (RWS) Pub Date : 2014-06-12 DOI: 10.1109/RWS.2014.6830157
Abdo Gaber, A. Omar
{"title":"Recent results of high-resolution wireless indoor positioning based on IEEE 802.11ac","authors":"Abdo Gaber, A. Omar","doi":"10.1109/RWS.2014.6830157","DOIUrl":"https://doi.org/10.1109/RWS.2014.6830157","url":null,"abstract":"This contribution addresses the problem of highly resolving the propagation time difference of arrival (TDOA) associated with signals in multipath communication channels for wireless indoor positioning. The Unitary Matrix Pencil (UMP) algorithm is enhanced and applied in a new way to estimate the propagation time delays from the estimated space channel frequency response (S-CFR) using MIMO-OFDM systems. The performance of using wideband orthogonal multicarrier signals and multiple antennas for wireless positioning are presented. A non-iterative least square (LS) estimator is also presented to estimate the mobile unit (MU) coordinates based on the TDOA observations. Experimental results using the emerging IEEE 802.11ac standard show that accuracy in the range of two cm can be achieved for two-dimensional (2-D) wireless indoor positioning.","PeriodicalId":247495,"journal":{"name":"2014 IEEE Radio and Wireless Symposium (RWS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130505715","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
Planar antipodal linearly tapered slot antenna using grounded coplanar waveguide-to-substrate integrated waveguide transition for passive millimeter-wave imaging 采用接地共面波导-衬底集成波导转换的平面对映线性锥形缝隙天线用于无源毫米波成像
2014 IEEE Radio and Wireless Symposium (RWS) Pub Date : 2014-06-12 DOI: 10.1109/RWS.2014.6830082
Wen Wang, Xuetian Wang, A. Fathy
{"title":"Planar antipodal linearly tapered slot antenna using grounded coplanar waveguide-to-substrate integrated waveguide transition for passive millimeter-wave imaging","authors":"Wen Wang, Xuetian Wang, A. Fathy","doi":"10.1109/RWS.2014.6830082","DOIUrl":"https://doi.org/10.1109/RWS.2014.6830082","url":null,"abstract":"In this work, a novel antipodal linearly tapered slot antenna (ALTSA) with two types of grounded coplanar waveguide (GCPW)-to-substrate integrated waveguide (SIW) transitions are proposed and demonstrated. The antenna is well designed for using as a feed antenna in the focal plane array (FPA) imaging system. PCB technology is used to fabricate the SIW antenna in a single layer structure. Good agreement was obtained between the simulation and measurement results. The return loss of the proposed antenna can achieve below -13dB at Ka-band, meanwhile, the E-plane side lobe is almost 15dB down. When placed on the focal plane of a reflector antenna, its side lobe dropped to 40dB down, which shows its high suitability for passive millimeter-wave (PMMW) FPA imaging system.","PeriodicalId":247495,"journal":{"name":"2014 IEEE Radio and Wireless Symposium (RWS)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115718550","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
Miniaturized tunable conical helix antenna 小型化可调谐锥形螺旋天线
2014 IEEE Radio and Wireless Symposium (RWS) Pub Date : 2014-06-12 DOI: 10.1109/RWS.2014.6830109
S. Zhu, T. Ghazaany, R. Abd‐Alhameed, S. R. Jones, J. Noras, T. Suggett, S. Marker
{"title":"Miniaturized tunable conical helix antenna","authors":"S. Zhu, T. Ghazaany, R. Abd‐Alhameed, S. R. Jones, J. Noras, T. Suggett, S. Marker","doi":"10.1109/RWS.2014.6830109","DOIUrl":"https://doi.org/10.1109/RWS.2014.6830109","url":null,"abstract":"A miniaturized conical helix antenna is presented, which displays vertical polarization with electrically small dimensions of 10mm×10mm×45mm. The resonance of the antenna is made tunable by adding a variable digital MEMS capacitor load at the bottom of the helix, giving a tuning range of 316 MHz to 400 MHz. The antenna demonstrates considerable impedance matching bandwidth and gain over the entire tuning frequency band. Most importantly, the antenna is capable of compact, flexible and easy integration into a wireless device package or for platform installation.","PeriodicalId":247495,"journal":{"name":"2014 IEEE Radio and Wireless Symposium (RWS)","volume":"90 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124855820","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
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