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2016 IEEE MTT-S International Wireless Symposium (IWS)最新文献

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Research on spherical antenna array imaging by simulation 球面天线阵列成像仿真研究
Pub Date : 2016-03-14 DOI: 10.1109/IEEE-IWS.2016.7585466
Liu Lianghuan, Wang Jiatong, Chen Zhangyou, Wu Xiongbin
This paper mainly studies on the spherical array imaging with spatial matched filtering. The azimuth resolution of circular trace scanning synthetic aperture radar is calculated. The factors affecting the azimuth resolution of the spherical array imaging are discussed, and a method of amplitude weighting is proposed to restrain the side lobe. Finally, the imaging effect of two kinds of array elements distribution is compared.
本文主要研究球面阵列空间匹配滤波成像。计算了圆迹扫描合成孔径雷达的方位分辨率。讨论了影响球阵成像方位角分辨率的因素,提出了一种幅度加权抑制旁瓣的方法。最后,比较了两种阵列元素分布的成像效果。
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引用次数: 0
Evaluation of transformer and capacitor coupling in W-band broadband CMOS power amplifiers w波段宽带CMOS功率放大器中变压器和电容耦合的评价
Pub Date : 2016-03-14 DOI: 10.1109/IEEE-IWS.2016.7585404
T. Tran, S. Vehring, Y. Ding, A. Hamidian, G. Boeck
This paper evaluates the transformer and capacitor coupling used in W-band broadband CMOS power amplifiers. Therefore two four-stage differential power amplifiers were implemented in 40 nm CMOS technology one with transformer coupling and one with capcitor coupling. In order to achieve broadband performance a complex output matching network consisting either of transmission lines and transformer or transmission lines and capacitor is employed. The power amplifier core and output matching network are optimized for the best compromise between bandwidth, output power and power-added-efficiency. Both implementations are measured and compared to the state-of-the-art. For both cases a bandwith nearly over the whole W-band is realized. The transformer-coupled power amplifier achieves output power of 10 dBm with 10 % power-added-efficiency while the capacitor-coupled power amplifier shows output power of 8 dBm with 8 % power-added-efficiency.
本文对w波段宽带CMOS功率放大器中变压器和电容的耦合进行了评价。为此,采用40 nm CMOS技术实现了变压器耦合和电容耦合两种四级差分功率放大器。为了实现宽带性能,采用由传输线和变压器或传输线和电容器组成的复杂输出匹配网络。功率放大器核心和输出匹配网络经过优化,以实现带宽、输出功率和功率附加效率之间的最佳折衷。这两种实现都进行了度量,并与最先进的实现进行了比较。在这两种情况下,都实现了几乎覆盖整个w波段的带宽。变压器耦合功率放大器输出功率为10 dBm,功率附加效率为10%;电容耦合功率放大器输出功率为8 dBm,功率附加效率为8%。
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引用次数: 3
Real-time digital predistortion for radio frequency power amplifier linearization 射频功率放大器线性化的实时数字预失真
Pub Date : 2016-03-14 DOI: 10.1109/IEEE-IWS.2016.7585463
S. Ferguson, A. Chopra
In this paper, a system is proposed for real-time calculation of digital predistortion (DPD) coefficients to linearize wideband radio frequency (RF) power amplifiers (PAs). The proposed system leverages the commercially available National Instruments (NI) PXIe-5646R vector signal transceiver (VST) platform. The VST is a single module RF instrument that combines a 200MHz instantaneous vector signal analyzer (VSA) and vector signal generator (VSG) with a shared Xilinx LX240T field-programmable gate array (FPGA). The FPGA is used to perform look-up table (LUT) predistorter estimation and predistortion in real-time. The proposed system is shown to reduce the time to generate a predistorted waveform by over two orders of magnitude compared to a software implementation. Furthermore, the linearity achieved with the proposed FPGA implementation closely matches a traditional software-based approach, with 15dB improvement in adjacent channel leakage ratio (ACLR) and a 3x improvement in error vector magnitude (EVM) for a 3G mobile handset power amplifier.
本文提出了一种实时计算数字预失真(DPD)系数的系统,用于线性化宽带射频功率放大器(pa)。该系统采用美国国家仪器公司(NI)的PXIe-5646R矢量信号收发器(VST)平台。VST是一种单模块射频仪器,结合了200MHz瞬时矢量信号分析仪(VSA)和矢量信号发生器(VSG)以及共享的Xilinx LX240T现场可编程门阵列(FPGA)。该FPGA用于实时执行查找表预失真估计和预失真。与软件实现相比,所提出的系统可以将产生预失真波形的时间减少两个数量级以上。此外,所提出的FPGA实现实现的线性度与传统的基于软件的方法非常接近,相邻通道泄漏比(ACLR)提高了15dB,误差矢量幅度(EVM)提高了3倍,用于3G手机功率放大器。
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引用次数: 3
Performance analysis of soft decision spectrum sensing based on multi-bit quantization 基于多比特量化的软决策频谱感知性能分析
Pub Date : 2016-03-14 DOI: 10.1109/IEEE-IWS.2016.7585417
Wu Hao, Zhao Hangsheng, Chen Yong, Liu Yong-xiang, Zhang Jian-zhao
In cognitive radio networks, soft decision spectrum sensing process the statistical measurement values sent by cognitive users through control channels in cognitive base station, and determine the activity of primary users. Owing to the limited bandwidth of the control channel, cognitive users shall quantify the statistical measurement values before sending it to cognitive base station. This paper put forwards the soft decision spectrum sensing based on multi-bit quantization, and analyzes the sensing performance of the algorithm in different quantization bits. Meantime the algorithm takes the quantization errors into account, and establishes the closed form expression for the detection performance. Simulation results show that the sensing performance of the soft decision spectrum sensing is very close to the performance without quantization when the number of quantization bits are great than four.
在认知无线网络中,软决策频谱感知对认知用户通过认知基站的控制通道发送的统计测量值进行处理,确定主用户的活动。由于控制信道的带宽有限,认知用户在发送到认知基站之前,需要将统计测量值进行量化。提出了基于多比特量化的软决策频谱感知,并分析了该算法在不同量化比特下的感知性能。同时,该算法考虑了量化误差,建立了检测性能的封闭形式表达式。仿真结果表明,当量化比特数大于4位时,软决策频谱感知的感知性能与不进行量化的感知性能非常接近。
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引用次数: 1
A terahertz Fabry-Pérot modulator using charge injection-induced insulator-metal transition in vanadium dioxide 在二氧化钒中使用电荷注入诱导绝缘体-金属跃迁的太赫兹法布里-帕姆罗调制器
Pub Date : 2016-03-14 DOI: 10.1109/IEEE-IWS.2016.7585435
O. Fawole, M. Tabib-Azar
We report the use of Insulator-Metal Transition (IMT) of vanadium dioxide (VO2) to modulate Fabry-Pérot resonances in a terahertz Fabry-Pérot resonator. Our two-plate Fabry-Pérot modulator consists of one partially reflecting plate of monolayer graphene on a polymer substrate, and another plate of VO2-integrated copper electrodes. VO2, a strongly correlated electron system, undergoes IMT upon application of external stimuli. In our Fabry-Pérot modulator device, we stimulated VO2 IMT by injecting charges into the VO2 via copper electrodes to realize a terahertz modulator. With 500mA DC at 12 V, we obtained 50% amplitude modulation depth at 0.884 THz.
我们报道了使用二氧化钒(VO2)的绝缘体-金属跃迁(IMT)来调制太赫兹法布里-普萨梅特谐振器中的法布里-普萨梅特谐振。我们的双极板fabry - p调制器由一个在聚合物衬底上的单层石墨烯部分反射板和另一个vo2集成铜电极板组成。VO2是一种强相关电子系统,在外界刺激下发生IMT。在我们的fabry - p调制器装置中,我们通过铜电极向VO2注入电荷来刺激VO2的IMT,从而实现了太赫兹调制器。在12v 500mA DC下,我们在0.884 THz下获得50%的调幅深度。
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引用次数: 0
Low-dispersion metamaterial-based phase shifters with reduced size and number of MEMS switches 基于低色散超材料的移相器,减小了MEMS开关的尺寸和数量
Pub Date : 2016-03-14 DOI: 10.1109/IEEE-IWS.2016.7585412
V. Gholizadeh, M. J. Asadi, Y. Ning, C. Palego, J. Hwang, D. Scarbrough, C. Goldsmith
This paper reports a low-dispersion metamaterial-based 3-bit phase shifter which occupies an area of approximately 5 mm2 and uses only six microelectromechanical systems (MEMS) switches. The phase shifter is based on a coplanar slow-wave structure with defected ground and comprises three unit cells of 180°, 90° and 45° phase shifts, respectively. Each unit cell uses two single-pole-single-throw MEMS capacitive switches in series and parallel configurations, respectively, to switch between right-handed (low-pass) and left-handed (high-pass) states for the specified phase shift. Three-dimensional finite-element electromagnetic simulation was used to help optimize the compact layout. The worst-case performance across the band of 24-28 GHz was simulated to have less than 9° root-mean-square phase error, less than 1.7 dB insertion loss, and greater than 13 dB return loss.
本文报道了一种基于低色散超材料的3位移相器,该移相器占地约5 mm2,仅使用6个微机电系统(MEMS)开关。该移相器基于带缺陷接地的共面慢波结构,包括三个相移分别为180°、90°和45°的单元格。每个单元单元分别使用串联和并联配置的两个单极单掷MEMS电容开关,在指定相移的右手(低通)和左手(高通)状态之间切换。采用三维有限元电磁仿真技术对结构进行优化。在24- 28ghz频段的最坏情况下,其相位误差小于9°,插入损耗小于1.7 dB,回波损耗大于13 dB。
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引用次数: 0
A planar broadband beam steering array with low cost 一种低成本的平面宽带波束控制阵列
Pub Date : 2016-03-14 DOI: 10.1109/IEEE-IWS.2016.7585425
Luqi Di, Xue-xia Yang, Yingjie Yu
A broadband beam steering smart planar array fed by the parabolic reflector of the substrate integrated waveguide (SIW) is proposed in this paper. The radiation element is continuous transverse stub (CTS) which are periodically arrayed on the plane waveguide. Both the CTS and the parabolic feed structure have broadband features. The beam steering directions are changeable with the different frequencies within the operation bandwidth. A 16-element array is simulated to validate the design. The simulation results show that the relative bandwidth of the reflection coefficient less than -10 dB is 69.9% (8.1 GHz-16.8 GHz) with the center frequency of 12.0 GHz. The gain at the broadside is 19.57 dBi with the first sidelobe level of -12.4 dB and the 3 dB beam width of 5.0°. The scanning angle range varies from -51° to 18° depending on frequency. This beam steering array could be applied in X band, Ku band and millimeter wave bands.
提出了一种基于衬底集成波导抛物反射面馈电的宽带波束导向智能平面阵列。辐射单元是连续的横向短段(CTS),周期性地排列在平面波导上。CTS和抛物线馈电结构都具有宽带特性。在工作带宽内,波束的方向随频率的变化而变化。模拟了一个16元阵列来验证设计。仿真结果表明,在中心频率为12.0 GHz时,反射系数小于-10 dB的相对带宽为69.9% (8.1 GHz ~ 16.8 GHz)。宽侧增益为19.57 dBi,第一副瓣电平为-12.4 dB, 3db波束宽度为5.0°。扫描角度范围根据频率从-51°到18°不等。该波束导向阵列可应用于X波段、Ku波段和毫米波波段。
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引用次数: 4
Visible light communication using the flash light LED of the smart phone as a light source and its application in the access control system 利用智能手机的LED闪光灯作为可见光通信光源及其在门禁系统中的应用
Pub Date : 2016-03-14 DOI: 10.1109/IEEE-IWS.2016.7585481
Linyong Fan, Qunxing Liu, Chunxu Jiang, Huawei Xu, J. Hu, Dongxiang Luo, Zhiyuan He, Qingli Huang
Visible light communication (VLC) is one of the most popular research points of the short range wireless communication. Due to the high efficiency, long lifetime, and fast switching characteristics of LEDs, LEDs are ideal light source for the VLC. In this paper, the flash light LED of the smart phone has been studied and used as the light source for the VLC. The encoding and decoding methods appropriate for the flash light have been proposed and demonstrated. This VLC technique has been applied in the access control system, which is simple, reliable, convenient, and low cost, and can be a supplement to the conventional access control system.
可见光通信(VLC)是近距离无线通信的研究热点之一。由于led的高效率、长寿命和快速开关特性,led是VLC的理想光源。本文对智能手机的闪光灯LED作为VLC的光源进行了研究。提出并论证了适用于该闪光灯的编码和解码方法。该VLC技术已应用于门禁系统中,具有简单、可靠、方便、成本低等优点,可以作为传统门禁系统的补充。
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引用次数: 16
Very low profile multibranch antenna with high-pass matching circuit for LTE/WWAN tablet computer device LTE/WWAN平板电脑设备的极低轮廓多支路天线与高通匹配电路
Pub Date : 2016-03-14 DOI: 10.1109/IEEE-IWS.2016.7585479
Liu Luan, Li Jiu-sheng
A low-profile multibranch antenna for the LTE/WWAN tablet computer device is presented. The antenna consists of three branches, an integrated matching circuit and a folded radiation patch. The matching circuit greatly enhance the low-band bandwidth (covering 698~960MHz) without increasing the antenna size. Detail operating principle of the antenna is described in this study. The antenna is disposed on a 0.8mm thick FR4 substrate of size 8 × 40 × 23 mm3. The proposed antenna is fabricated and tested.
提出了一种用于LTE/WWAN平板电脑设备的低轮廓多支路天线。天线由三个支路、一个集成匹配电路和一个折叠辐射贴片组成。该匹配电路在不增加天线尺寸的情况下,大大提高了低频段带宽(覆盖698~960MHz)。详细介绍了天线的工作原理。天线布置在0.8mm厚的8 × 40 × 23 mm3的FR4基板上。所提出的天线进行了制作和测试。
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引用次数: 0
Fabrication and measurement of millimeter-wave on-chip MIMO antenna for CMOS RFIC's CMOS RFIC毫米波片上MIMO天线的制作与测量
Pub Date : 2016-03-14 DOI: 10.1109/IEEE-IWS.2016.7585434
Liwen Jing, C. Rowell, S. Raju, M. Chan, R. Murch, C. Yue
This paper presents a compact on-chip MIMO antenna design. The proposed structure consists of one folded monopole antenna operating as main antenna and one IFA antenna serving as the diversity antenna. Antenna ground is formed by connecting the idle space in the pad ring area with the ground pads and the ground plane of the circuit. The proposed antenna is fabricated with standard CMOS process. Measurement results show that the input reflection coefficient of the main antenna is lower than -10dB from 56GHz to 65GHz, covering all four channels of the WiGig standard. The diversity antenna operates in the 56 ~ 61GHz frequency range. -20dB isolation between antennas is achieved. The peak broadside gains of the main antenna and diversity antenna at 60GHz are -3.8dB and -6.1dB respectively. The simulated correlation coefficient between the main antenna and diversity antenna is smaller than 0.2 from 56GHz to 64GHz.
本文提出了一种紧凑的片上MIMO天线设计方案。该结构由一个折叠单极天线作为主天线和一个IFA天线作为分集天线组成。天线接地是通过将衬垫环区域内的空闲空间与电路的接地垫和接平面连接而形成的。该天线采用标准CMOS工艺制作。测试结果表明,在56GHz ~ 65GHz范围内,主天线的输入反射系数小于-10dB,覆盖了WiGig标准的全部4个通道。分集天线工作在56 ~ 61GHz频率范围内。天线之间实现-20dB隔离。主天线和分集天线在60GHz时的峰值宽边增益分别为-3.8dB和-6.1dB。在56GHz ~ 64GHz范围内,主天线与分集天线的模拟相关系数小于0.2。
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引用次数: 10
期刊
2016 IEEE MTT-S International Wireless Symposium (IWS)
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