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2015 IEEE International Wireless Symposium (IWS 2015)最新文献

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A comparative study of wideband and dual-band digital predistortion architectures 宽带和双带数字预失真结构的比较研究
2015 IEEE International Wireless Symposium (IWS 2015) Pub Date : 2015-07-27 DOI: 10.1109/IEEE-IWS.2015.7164607
A. Abdelhafiz, Mayada F. Younes, A. Kwan, O. Hammi, F. Ghannouchi, N. Boulejfen
{"title":"A comparative study of wideband and dual-band digital predistortion architectures","authors":"A. Abdelhafiz, Mayada F. Younes, A. Kwan, O. Hammi, F. Ghannouchi, N. Boulejfen","doi":"10.1109/IEEE-IWS.2015.7164607","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2015.7164607","url":null,"abstract":"In this paper, the wideband and dual-band architectures for digital predistorters (DPD) are compared in terms of the DPD models used, hardware implementations, complexity and linearization performance. The advantages and disadvantages of each architecture are outlined and hardware measurements are performed using an amplifier prototype to illustrate the differences between the two approaches.","PeriodicalId":164534,"journal":{"name":"2015 IEEE International Wireless Symposium (IWS 2015)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127872557","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
Fractal MA and for in-band RCS reduction of array antennas 分形MA和用于阵列天线带内RCS降低
2015 IEEE International Wireless Symposium (IWS 2015) Pub Date : 2015-07-27 DOI: 10.1109/IEEE-IWS.2015.7164574
Sijia Li, Xiangyu Cao, Jun Gao, Yi Zhao, Zhao Zhang
{"title":"Fractal MA and for in-band RCS reduction of array antennas","authors":"Sijia Li, Xiangyu Cao, Jun Gao, Yi Zhao, Zhao Zhang","doi":"10.1109/IEEE-IWS.2015.7164574","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2015.7164574","url":null,"abstract":"To miniaturize the perfect metamaterial absorber, a fractal three-order oblique cross dipole slot structure is proposed and investigated. The fractal perfect metamaterial absorber (FPMA) consists of two metallic layers separated by a lossy dielectric substrate. The top layer etched a three-order oblique fractal-shaped cross dipole slot set in a square patch and the bottom one is a solid metal. A prototype with a thickness of 0.0106λ (λ is the wavelength at 3.18GHz) of the FPMA is designed, fabricated, measured, and is loaded on a 1×10 guidewave slot array antennas to reduce the in-band radar cross section (RCS). Experiments are carried out to verify the simulation results, and the experimental results show that the absorption at normal incidence is above 90% from 3.17 to 3.22GHz, and the array antennas significantly obtain the RCS reduction without the radiation deterioration.","PeriodicalId":164534,"journal":{"name":"2015 IEEE International Wireless Symposium (IWS 2015)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124260567","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 new metamaterial-based UWB MIMO antenna 一种新型超材料超宽带MIMO天线
2015 IEEE International Wireless Symposium (IWS 2015) Pub Date : 2015-07-27 DOI: 10.1109/IEEE-IWS.2015.7164554
Fei Wang, Z. Duan, T. Tang, Minzhi Huang, Zhanliang Wang, Y. Gong
{"title":"A new metamaterial-based UWB MIMO antenna","authors":"Fei Wang, Z. Duan, T. Tang, Minzhi Huang, Zhanliang Wang, Y. Gong","doi":"10.1109/IEEE-IWS.2015.7164554","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2015.7164554","url":null,"abstract":"In this paper, the design of an ultra-wideband (UWB) multiple-input-multiple-output (MIMO) antenna based on metamaterial is proposed. The antenna is designed to achieve dual band-notched and high isolation using metamaterials. The traditional split ring resonators (SRRs) are used to achieve the band-notched effect and a new type of SRR is used to reduce the mutual coupling at both 3.1 GHz and 10 GHz. The antenna performance is presented through its S-parameters and radiation pattern. It shows the potential application in mobile devices or other small-scaled equipments.","PeriodicalId":164534,"journal":{"name":"2015 IEEE International Wireless Symposium (IWS 2015)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124537423","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: 14
Robust and fast iterative algorithm based on Levenberg-Marquardt and spectral extrapolation for wideband digital predistortion of RF power amplifiers 基于Levenberg-Marquardt和频谱外推的射频功率放大器宽带数字预失真鲁棒快速迭代算法
2015 IEEE International Wireless Symposium (IWS 2015) Pub Date : 2015-07-27 DOI: 10.1109/IEEE-IWS.2015.7164579
Haoyu Wang, Falin Liu, W. Tao
{"title":"Robust and fast iterative algorithm based on Levenberg-Marquardt and spectral extrapolation for wideband digital predistortion of RF power amplifiers","authors":"Haoyu Wang, Falin Liu, W. Tao","doi":"10.1109/IEEE-IWS.2015.7164579","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2015.7164579","url":null,"abstract":"The analog-to-digital converter (ADC) is one of the most expensive components in an RF transmitter, conventional digital predistortion (DPD) could be seriously limited in dealing with the wideband feedback signals. Modern wireless communication systems are requiring higher data rate and wider bandwidth, a more powerful linearization technique is required. In this paper, we propose a robust iterative DPD coefficients extraction algorithm based on Levenberg-Marquardt algorithm and spectral extrapolation. By applying this method, the speed of ADC can be reduced significantly and thus save the cost. Experimental results demonstrate that the proposed method is numerically stable and more suitable for iteration than the damped Gauss-Newton method mentioned in [7].","PeriodicalId":164534,"journal":{"name":"2015 IEEE International Wireless Symposium (IWS 2015)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123983448","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
Wideband millimeter-wave SIW cavity backed patch antenna fed by substrate integrated coaxial line 基片集成同轴线馈电的宽带毫米波SIW腔背贴片天线
2015 IEEE International Wireless Symposium (IWS 2015) Pub Date : 2015-07-27 DOI: 10.1109/IEEE-IWS.2015.7164527
Tao Zhang, Yan Zhang, W. Hong, K. Wu
{"title":"Wideband millimeter-wave SIW cavity backed patch antenna fed by substrate integrated coaxial line","authors":"Tao Zhang, Yan Zhang, W. Hong, K. Wu","doi":"10.1109/IEEE-IWS.2015.7164527","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2015.7164527","url":null,"abstract":"In this paper, a wideband substrate integrated waveguide (SIW) cavity backed patch antenna element is proposed for high-gain arrays at millimeter-wave bands. By compensating the inductance of the feeding metallic via with a capacitive ring slot on the ground plate, an additional resonance is introduced to the patch mode to expand the bandwidth. To suppress the backward radiation from the slot and enhance antenna gain, a back SIW cavity is designed. Moreover, the low-loss and compact substrate integrated coaxial line (SICL) is employed as the feeding line. The simulated -10/-15 dB impedance bandwidth of the element is 14.9%/11.6% (both at 43 GHz). The introducing of the back cavity and SICL makes the element suitable for large wideband high-gain millimeter-wave arrays with excellent front-to-back ratios (FBRs) and stable radiation patterns on printed circuit boards (PCBs). As an illustrative example, a 2×2 corporately-fed sub-array is developed and tested. The -10 dB impedance bandwidth is 11.7%, and the peak gain is 11.4 dBi with a simulated radiation efficiency of 88% and measured FBR of above 20 dB.","PeriodicalId":164534,"journal":{"name":"2015 IEEE International Wireless Symposium (IWS 2015)","volume":"185 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130233251","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: 16
Practical Large Scale Antenna Systems for 5G cellular networks 5G蜂窝网络的实用大规模天线系统
2015 IEEE International Wireless Symposium (IWS 2015) Pub Date : 2015-07-27 DOI: 10.1109/IEEE-IWS.2015.7164529
C. Rowell, Shuangfeng Han
{"title":"Practical Large Scale Antenna Systems for 5G cellular networks","authors":"C. Rowell, Shuangfeng Han","doi":"10.1109/IEEE-IWS.2015.7164529","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2015.7164529","url":null,"abstract":"In order to increase capacity and reduce power consumption for future cellular networks, new cellular architectures and radio access schemes will be required. Two important technologies for future 5G and 6G networks include Cloud-Radio Access Networks (C-RAN) and Large Scale Antenna Systems (LSAS) with hundred's of low power radios to increase the cell capacity with multi-user MIMO multiplexing and beamforming. Although LSAS in theory promises large capacity gains at the fraction of the power consumed by the current macro-basestations; there are many practical challenges that need to be overcome before LSAS can be successfully integrated into current and future cellular networks: 1) low-power beamforming algorithms, 2) frequency, amplitude, and phase calibration of asynchronous radios; 3) irregular array beamforming, 4) front-haul data capacity linkage between the LSAS and a C-RAN unit; and 5) standardized measurement procedures. This paper briefly examines each challenge and proposes possible solutions.","PeriodicalId":164534,"journal":{"name":"2015 IEEE International Wireless Symposium (IWS 2015)","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127855355","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
Design of planar wideband MIMO antenna for mobile phones 手机用平面宽带MIMO天线设计
2015 IEEE International Wireless Symposium (IWS 2015) Pub Date : 2015-07-27 DOI: 10.1109/IEEE-IWS.2015.7164530
Wen-Ao Li, Zhihong Tu, Q. Chu
{"title":"Design of planar wideband MIMO antenna for mobile phones","authors":"Wen-Ao Li, Zhihong Tu, Q. Chu","doi":"10.1109/IEEE-IWS.2015.7164530","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2015.7164530","url":null,"abstract":"This paper presents a dual-port planar multiple-input-multiple-output (MIMO) antenna with wide bandwidth. The proposed MIMO antenna element consists of a monopole and a step impedance resonator (SIR) stub which extends from the ground and is coupling fed by the monopole. A slot is etched on the ground and a neutralization line is connected with the two antenna elements for decoupling. The simulated results show that the MIMO antenna achieves a wide bandwidth of 105.7% from 0.87 GHz to 2.82GHz, fully covering the 2G bands of GSM900/ GSM1800/GSM1900, 3G bands of TD-SCDMA/WCDMA/ CDMA2000 and most of the 4G (LTE) bands. The isolation is better than 12.5 dB in the lower band and 15dB in the higher band. Besides, the envelope correlation coefficient and mean effective gain are also studied. The planar structure and good diversity performance make the MIMO antenna very suitable for mobile terminals like smart phones.","PeriodicalId":164534,"journal":{"name":"2015 IEEE International Wireless Symposium (IWS 2015)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125408454","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
Integrated Doherty RF CMOS Power Amplifier design for average efficiency enhancement 集成Doherty射频CMOS功率放大器设计，提高平均效率
2015 IEEE International Wireless Symposium (IWS 2015) Pub Date : 2015-07-27 DOI: 10.1109/IEEE-IWS.2015.7164638
N. Deltimple, Marcos L. Carneiro, E. Kerhervé, P. Carvalho, D. Belot
{"title":"Integrated Doherty RF CMOS Power Amplifier design for average efficiency enhancement","authors":"N. Deltimple, Marcos L. Carneiro, E. Kerhervé, P. Carvalho, D. Belot","doi":"10.1109/IEEE-IWS.2015.7164638","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2015.7164638","url":null,"abstract":"This paper deals with the implementation of a RF Doherty Power Amplifier (DPA) with the objective of improving the average efficiency. This technique is an interesting way to provide efficient PA for high PAPR signal of more recent standards of communications. The Doherty principle is applied to a 2.5GHz fully integrated PA on a CMOS 65nm technology. The DPA exhibits 23.4dBm output power, 15dB of power gain and 24.7% of PAE on a 7 dB power range. The die size is 2.89mm2. To fulfill high data rates, wide-band behavior is a big challenge. Hence the wideband behavior of integrated DPA is also investigated.","PeriodicalId":164534,"journal":{"name":"2015 IEEE International Wireless Symposium (IWS 2015)","volume":"89 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116083892","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: 11
High efficiency Doherty transmitter with antenna active load modulation 天线有源负载调制的高效率多尔蒂发射机
2015 IEEE International Wireless Symposium (IWS 2015) Pub Date : 2015-07-27 DOI: 10.1109/IEEE-IWS.2015.7164510
Wen-hua Chen, Shuo Jia, Schreurs Dominique
{"title":"High efficiency Doherty transmitter with antenna active load modulation","authors":"Wen-hua Chen, Shuo Jia, Schreurs Dominique","doi":"10.1109/IEEE-IWS.2015.7164510","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2015.7164510","url":null,"abstract":"This paper presents a novel Doherty transmitter architecture with antenna active load modulation (AALM) to improve the efficiency of array transmitters. In this paper, the conventional power combiner which limits the performance of Doherty power amplifier is removed, and two power amplifiers (PAs) are directly connected to antenna array. Unlike conventional Doherty architecture, the proposed Doherty PA makes use of the mutual coupling between the array elements to realize two-way power combiner. A transmitter prototype is designed and realized to confirm the proposed architecture. The implemented transmitter works at 2.3GHz, and achieves power gain of 14 dB, saturated output power of 40.5 dBm, and drain efficiency of better than 40% at 6dB power back off.","PeriodicalId":164534,"journal":{"name":"2015 IEEE International Wireless Symposium (IWS 2015)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116153827","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
Wireless authentication platform for healthcare applications 用于医疗保健应用的无线身份验证平台
2015 IEEE International Wireless Symposium (IWS 2015) Pub Date : 2015-07-27 DOI: 10.1109/IEEE-IWS.2015.7164620
J. Miranda, J. Cabral, B. Ravelo, S. Wagner, C. F. Pedersen, M. Memon, M. Mathiesen
{"title":"Wireless authentication platform for healthcare applications","authors":"J. Miranda, J. Cabral, B. Ravelo, S. Wagner, C. F. Pedersen, M. Memon, M. Mathiesen","doi":"10.1109/IEEE-IWS.2015.7164620","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2015.7164620","url":null,"abstract":"An innovative wireless authentication platform for healthcare applications is designed, implemented and tested. It acts as a Common Recognition and Identification Platform (CRIP) operating with write/read function via either NFC or biometric modules for the users' authentication. The CRIP base station architecture consists of 13.56MHz NFC/RFID and 2.4GHz IEEE standard 802.15.1 BLE modules. The Bluetooth function enables the medical device communication with the tens meter range RF link. The CRIP prototype was tested successfully in hospital environments. The blood pressure data transmission in real time was collected and monitored with an assistant living healthcare platform. Finally, the CRIP complies in conformity with the electromagnetic compatibility (EMC) standard EN55022 Class B requirements.","PeriodicalId":164534,"journal":{"name":"2015 IEEE International Wireless Symposium (IWS 2015)","volume":"86 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116239293","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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