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

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A 77GHz CMOS array receiver, transmitter and antenna for low cost small size automotive radar 用于低成本小型汽车雷达的77GHz CMOS阵列接收机、发射机和天线
2014 IEEE International Wireless Symposium (IWS 2014) Pub Date : 2014-03-24 DOI: 10.1109/IEEE-IWS.2014.6864270
Cheonsoo Kim, Piljae Park, Dong-young Kim, Seongdo Kim, Hyun-Kyu Yu
{"title":"A 77GHz CMOS array receiver, transmitter and antenna for low cost small size automotive radar","authors":"Cheonsoo Kim, Piljae Park, Dong-young Kim, Seongdo Kim, Hyun-Kyu Yu","doi":"10.1109/IEEE-IWS.2014.6864270","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2014.6864270","url":null,"abstract":"A 77GHz CMOS 4-channels receiver, transmitter with 3-outputs and array antenna architecture is proposed for low cost/small size automotive radar system, and implemented by using 65nm CMOS technology and LTCC substrate. Measured performance of CMOS transceiver, which included useful functions such as dual operation of long/short range detection, I/Q signal process and gain attenuation when near target detection, shows comparable performances to that of commercial SiGe radar chips. Especially, the transmitter consumes one third lower power compared to SiGe chips. These results confirm that it may be a promising candidate for low cost and small size car radar system.","PeriodicalId":225547,"journal":{"name":"2014 IEEE International Wireless Symposium (IWS 2014)","volume":"13 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":"123433818","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
EE-SE relationship in MIMO systems MIMO系统中的EE-SE关系
2014 IEEE International Wireless Symposium (IWS 2014) Pub Date : 2014-03-24 DOI: 10.1109/IEEE-IWS.2014.6864253
C. I, Shuangfeng Han, Zhikun Xu, Z. Pan
{"title":"EE-SE relationship in MIMO systems","authors":"C. I, Shuangfeng Han, Zhikun Xu, Z. Pan","doi":"10.1109/IEEE-IWS.2014.6864253","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2014.6864253","url":null,"abstract":"Energy efficiency (EE) has been recognized as another important metric as well as spectral efficiency (SE). This paper investigates the fundamental properties of the EE-SE relationship for point-to-point MIMO transmission link. Reducing circuit power is helpful to improve EE in the low SE region while introducing more antennas benefits the EE in the high SE region. We also study the properties of EE-optimal points. It is found that reducing circuit power brings exponential EE increasing with linear SE loss at the EE-optimal points. More multiplexing gain will alleviate the speed of EE reduction with the increase of SE. More diversity gain brings a fixed EE gain. Above conclusion is also suitable to MIMO systems with active antennas. With the given number of antennas, there is an optimal number of transceivers to maximize the EE for each SE value.","PeriodicalId":225547,"journal":{"name":"2014 IEEE International Wireless Symposium (IWS 2014)","volume":"6 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":"125935613","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
Use of optimization in designing complex electromagnetic radiating structures 优化在复杂电磁辐射结构设计中的应用
2014 IEEE International Wireless Symposium (IWS 2014) Pub Date : 2014-03-24 DOI: 10.1109/IEEE-IWS.2014.6864283
D. García Doñoro, M. Salazar-Palma, T. Sarkar, Y. Zhang, H. Moon, S. Ting
{"title":"Use of optimization in designing complex electromagnetic radiating structures","authors":"D. García Doñoro, M. Salazar-Palma, T. Sarkar, Y. Zhang, H. Moon, S. Ting","doi":"10.1109/IEEE-IWS.2014.6864283","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2014.6864283","url":null,"abstract":"This paper presents an automatic optimization routine for simultaneous optimization of a large number of unknowns.","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":"130943482","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
Ultrathin microwave absorber in wireless communication band made of Swiss roll metamaterial structure 无线通信波段超薄微波吸收器采用瑞士卷超材料结构
2014 IEEE International Wireless Symposium (IWS 2014) Pub Date : 2014-03-24 DOI: 10.1109/IEEE-IWS.2014.6864243
Ke Chen, Bo O. Zhu, Nan Jia, Boyu Sima, Junming Zhao, T. Jiang, Yijun Feng
{"title":"Ultrathin microwave absorber in wireless communication band made of Swiss roll metamaterial structure","authors":"Ke Chen, Bo O. Zhu, Nan Jia, Boyu Sima, Junming Zhao, T. Jiang, Yijun Feng","doi":"10.1109/IEEE-IWS.2014.6864243","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2014.6864243","url":null,"abstract":"Swiss rolls, consisting of a helically wound metal/dielectric laminate tape are utilized to achieve a novel ultrathin metamaterial absorber (MA) with a thickness of only about less than two percent of the incident wavelength. An intense magnetic resonance happens accompanied by strong absorption efficiency above 95% for both the TE and TM incident waves at the resonant frequency with the incidence angle up to 45° in the full-wave simulation. Samples have been fabricated to verify the performance of the MA for normal incidence using the TEM cell. In addition, a potential application of the proposed Swiss roll MA is discussed for the global system for mobile communication (GSM).","PeriodicalId":225547,"journal":{"name":"2014 IEEE International Wireless Symposium (IWS 2014)","volume":"48 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":"127891697","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
The art of parallelization in solving large electromagnetic field problems out-of-core 求解核外大电磁场问题的并行化技术
2014 IEEE International Wireless Symposium (IWS 2014) Pub Date : 2014-03-24 DOI: 10.1109/IEEE-IWS.2014.6864282
Y. Zhang, H. Moon, D. García Doñoro, T. Sarkar, M. Salazar-Palma, S. Ting
{"title":"The art of parallelization in solving large electromagnetic field problems out-of-core","authors":"Y. Zhang, H. Moon, D. García Doñoro, T. Sarkar, M. Salazar-Palma, S. Ting","doi":"10.1109/IEEE-IWS.2014.6864282","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2014.6864282","url":null,"abstract":"The objective of this presentation is to illustrate the art of writing a parallel code that exploits an out-of-core solver.","PeriodicalId":225547,"journal":{"name":"2014 IEEE International Wireless Symposium (IWS 2014)","volume":"50 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":"125397269","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 integrated direct conversion receiver for E-band wireless communication 用于e波段无线通信的高度集成的直接转换接收器
2014 IEEE International Wireless Symposium (IWS 2014) Pub Date : 2014-03-24 DOI: 10.1109/IEEE-IWS.2014.6864251
Jian Zhang, Yu Ye, R. Tong, Xiaowei Sun
{"title":"A highly integrated direct conversion receiver for E-band wireless communication","authors":"Jian Zhang, Yu Ye, R. Tong, Xiaowei Sun","doi":"10.1109/IEEE-IWS.2014.6864251","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2014.6864251","url":null,"abstract":"In this paper, a highly integrated direct conversion receiver MMIC for high speed E-band wireless communication is presented. The receiver consists of 3-stages LNA, doubler with buffer amplifier, and IQ-mixer. The LNA, doubler and IQ-mixer are also presented separately. The LNA covers 75 to 90 GHz with 15 dB gain and a simulated minimum 5 dB noise figure; doubler covers 75 to 90 GHz with 8 to 12 dBm output power and the IQ-mixer an RF frequency from 75 to 90 GHz and IF frequency from DC to 8 GHz with only estimated 8 dB conversion loss and better than 35 dB image reject. The complete receiver circuit shows an RF bandwidth of 75 to 90 GHz and IF bandwidth from DC to more than 8 GHz. The conversion gain is around 8 dB with a estimated noise figure of 5 to 7 dB, the image rejection 25 dB to as high as 30 dB.","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":"125424714","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
A band-limited 2-D digital predistorter for concurrent dual-band RF transmitters 用于并发双频射频发射机的带限二维数字预失真器
2014 IEEE International Wireless Symposium (IWS 2014) Pub Date : 2014-03-24 DOI: 10.1109/IEEE-IWS.2014.6864197
Chao Yu, Yan Guo, A. Zhu
{"title":"A band-limited 2-D digital predistorter for concurrent dual-band RF transmitters","authors":"Chao Yu, Yan Guo, A. Zhu","doi":"10.1109/IEEE-IWS.2014.6864197","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2014.6864197","url":null,"abstract":"In this paper, a novel band-limited two-dimensional (2-D) digital predistorter (DPD) is proposed to linearize wideband radio frequency (RF) power amplifiers in concurrent dual-band transmitters. It is achieved by introducing a band-limiting technique into the existing 2-D DPD model in order to resolve the bandwidth mismatching problem in wideband communication systems. Compared to the existing 2-D DPD, the proposed method can further reduce the sampling rate requirement of the analog to digital and digital to analog converters, and the bandwidth of the transmitter and the observation path of the DPD system. Experimental results show that the proposed approach produces excellent performance and it is well suitable for future ultra wideband concurrent dual-band transmitters.","PeriodicalId":225547,"journal":{"name":"2014 IEEE International Wireless Symposium (IWS 2014)","volume":"319 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":"123329315","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
Long range passive wireless MEMS-based inclination or acceleration sensor utilizing the intermodulation communication principle 利用互调通信原理的远距离无源无线mems倾斜或加速度传感器
2014 IEEE International Wireless Symposium (IWS 2014) Pub Date : 2014-03-24 DOI: 10.1109/IEEE-IWS.2014.6864222
Jinsong Song, N. Pesonen, V. Viikari
{"title":"Long range passive wireless MEMS-based inclination or acceleration sensor utilizing the intermodulation communication principle","authors":"Jinsong Song, N. Pesonen, V. Viikari","doi":"10.1109/IEEE-IWS.2014.6864222","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2014.6864222","url":null,"abstract":"The intermodulation communication principle has recently been developed to wirelessly read out passive sensors' data. The advantages over other passive wireless techniques include significant reading distances and the possibility of using different sensor elements while complying with frequency regulations. In this paper, we describe a MEMS-based passive wireless transponder relying on the intermodulation communication principle and applied to inclinometer or accelerometer measurements. The transponder operates at the UHF band and provides ± 1 g acceleration and ± 90 degrees inclination range within a reading distance of several meters.","PeriodicalId":225547,"journal":{"name":"2014 IEEE International Wireless Symposium (IWS 2014)","volume":"39 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":"123335692","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 0.18-μm BiCMOS wide locking-range divide-by-2 injection-locked frequency divider with dual-injection 一种0.18 μm双注入BiCMOS宽锁定范围/ 2注入锁定分频器
2014 IEEE International Wireless Symposium (IWS 2014) Pub Date : 2014-03-24 DOI: 10.1109/IEEE-IWS.2014.6864194
Sanghun Lee, Sunhwan Jang, J. Bae, C. Nguyen
{"title":"A 0.18-μm BiCMOS wide locking-range divide-by-2 injection-locked frequency divider with dual-injection","authors":"Sanghun Lee, Sunhwan Jang, J. Bae, C. Nguyen","doi":"10.1109/IEEE-IWS.2014.6864194","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2014.6864194","url":null,"abstract":"A new divide-by-2 injection locked frequency divider (ILFD) with dual-injection technique is proposed. The proposed ILFD is developed with divide-by-2 current mode logic (CML) divider, which is connected at the output of the ILFD to achieve constant output amplitude. Fabricated in 0.18-μm BiCMOS process, the proposed divide-by-2 ILFD with dual-injection improves the locking range through simultaneous optimization of loaded quality factor (QL) and oscillation current amplitude (iosc) while consuming low power. The measured locking range of the proposed ILFD with dual-injection is 692 MHz between 7.512 GHz and 8.204 GHz, which is almost 10 times wider than that of a single-injection counterpart. The core of the ILFD with dual-injection only consumes 2.9 mA with 1.5-V supply.","PeriodicalId":225547,"journal":{"name":"2014 IEEE International Wireless Symposium (IWS 2014)","volume":"15 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":"122205751","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
A low complexity user selection scheme in downlink MU-MIMO system 下行MU-MIMO系统中一种低复杂度的用户选择方案
2014 IEEE International Wireless Symposium (IWS 2014) Pub Date : 2014-03-24 DOI: 10.1109/IEEE-IWS.2014.6864246
Gibum Kim, Jinwoo Kim, Hyungsik Han, Hyuncheol Park
{"title":"A low complexity user selection scheme in downlink MU-MIMO system","authors":"Gibum Kim, Jinwoo Kim, Hyungsik Han, Hyuncheol Park","doi":"10.1109/IEEE-IWS.2014.6864246","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2014.6864246","url":null,"abstract":"In this paper, we describe a low complexity greedy user selection scheme for multiuser MIMO systems. We propose a new metric which has significantly reduced computational complexity and improved performance compared to Frobenius norm. The approximation of projection matrix is applied to reduce the number of singular value decomposition (SVD) operations. We analyze the computational complexity of metrics, and verify the reduced complexity by numerical evaluation. Our simulation result shows that the proposed metric can achieve the improved sum rate as the number of user antenna increases.","PeriodicalId":225547,"journal":{"name":"2014 IEEE International Wireless Symposium (IWS 2014)","volume":"35 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":"134221321","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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