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International Conference on Computer Science and Education

作者： Baobin Liu Wei Zhou School of Engineering and Technology Jiangsu Vocational Institute of Commerce School of Information Technology Jiangsu Vocational Institute of Commerce

ISBN: (纸本)9781509022199

An adaptive iterative learning control (AILC) is proposed to release the requirement of repetitiveness for a class of multiple-input multiple-output nonlinear systems. Based on high-order internal model, the time-iteration-varying law of parametric uncertainty is expressed. Furthermore, reference trajectory and initial state are varying from iteration to iteration randomly. The asymptotic convergence of the proposed AILC method has been proved through rigorous derivation. Simulation results show that the proposed algorithm can achieve the control target well.

关键词： Adaptive iterative learning control Non-repetitive uncertainty Nonlinear systems multiple-input multiple-output Discrete-time system

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Joint Space-Shift Keying and Orthogonal Shift-Keying Modulation for Energy-Efficient Signal Transmission

Joint Space-Shift Keying and Orthogonal Shift-Keying Modulat...

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IEEE Vehicular Technology Conference

作者： Lie-Liang Yang Jingru Chen School of ECS University of Southampton

ISBN: (纸本)9781509016990

We propose a novel spatial modulation (SM) scheme, which is a joint of two index modulation schemes. One is the M-ary spatial shift-keying (MSSK) modulation operated in the space domain, while the other one is the M-ary orthogonal shift keying (MOSK) modulation, which usually requires more bandwidth to implement, when its modulation level increases. As both MSSK and MOSK belong to the energy-efficient modulation schemes, the joint MSSK-MOSK modulation is energy-efficient, which is suitable for providing reliable communications in low signal to noise ratio (SNR) region. We also propose two approaches for detection of the MSSK-MOSK signals. The first approach is the joint maximum likelihood detection (MLD), which simultaneously detects the component MSSK symbol and MOSK symbol in MLD principle. The second approach is the successive MLD, which first detects the component MOSK symbol using non-coherent MLD, and then the component MSSK symbol using coherent MLD. Finally, we investigate the error performance of the MSSK-MOSK modulation, when assuming communications over flat Rayleigh fading channels with receiver diversity. Our studies demonstrate that the joint MLD slightly outperforms the successive MLD, but requires much higher complexity for implementation. With the resources provided from both the space and frequency domains, the MSSK-MOSK with high modulation levels may be readily implemented, which makes it is possible to provide reliable communications at very low energy consumption, even when the low-complexity successive MLD is employed.

关键词： multiple-input multiple-output Spatial modulation Space shift keying Orthogonal shift keying Maximum likelihood detection maximum likelihood detection shift keying Metachromatic Leukodystrophy minimum lethal dose multiple input multiple output systems Signal Transduction SPATIAL MODULATION Energy efficiency Joints Raleigh fading channels error performance low SNR

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A FREQUENCY RECONFIGURABLE MIMO ANTENNAS USING RF TUNING ELEMENT FOR MOBILE HANDSET

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MICROWAVE AND OPTICAL TECHNOLOGY LETTERS 2015年第5期57卷 1092-1096页

作者： Lee, Won-Woo Cho, Yong-Sang LG Elect Business Grp Top Such Mobile Phone Dev Puchon 422708 Gyeonggi Do South Korea

In this letter, we develop a frequency tunable multipleinput multiple-output antenna for handhelds to achieve both the wideband tunability at the frequency ranges of 704-960 MHz and low correlation properties over the tuning frequencies. The proposed antenna covers various long-term evolution (LTE) service bands: Band 17 (704-746 MHz), Band 13 (746-787 MHz), Band 5 (824-894 MHz), and Band 8 (880-960 MHz). The proposed LTE antennas are based on a switch-loaded antenna structure, with a resonance frequency that can be controlled by a logic circuit. The tuning technique for the LTE antenna uses a SP4T RF switch to match the impedances to realize the bands of interest. The proposed main antenna consists of an inverted-F antenna (IFA), the LTE subantenna is loop antenna structure. The use of two different antenna types of IFA and loop antenna achieves high isolation. We show that the proposed antenna has envelop correlation coefficient value as low as 0.5 over the designed frequency tuning ranges. The proposed antenna was fabricated and tested for experimental verification. (C) 2015 Wiley Periodicals, Inc.

关键词： antenna envelop correlation coefficient long-term evolution multiple-input multiple-output RF switch

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MIMO free-space optical communication employing coherent BPOLSK modulation in atmospheric optical turbulence channel with pointing errors

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OPTICS COMMUNICATIONS 2015年 343卷 188-194页

作者： Prabu, K. Kumar, D. Sriram Vellore Inst Technol Sch Elect Engn Vellore 632014 Tamil Nadu India Natl Inst Technol Dept Elect & Commun Engn Tiruchirappalli 620015 Tamil Nadu India

An optical wireless communication system is an alternative to radio frequency communication, but atmospheric turbulence induced fading and misalignment fading are the main impairments affecting an optical signal when propagating through the turbulence channel. The resultant of misalignment fading is the pointing errors, it degrades the bit error rate (BER) performance of the free space optics (FSO) system. In this paper, we study the BER performance of the multiple-input multiple-output (MIMO) FSO system employing coherent binary polarization shift keying (BPOLSK) in gamma-gamma (G-G) channel with pointing errors. The BER performance of the BPOLSK based MIMO FSO system is compared with the single-input single-output (SISO) system. Also, the average BER performance of the systems is analyzed and compared with and without pointing errors. A novel closed form expressions of BER are derived for MIMO FSO system with maximal ratio combining (MRC) and equal gain combining (EGC) diversity techniques. The analytical results show that the pointing errors can severely degrade the performance of the system. (C) 2015 Elsevier B.V. All rights reserved.

关键词： Free space optics Binary polarization shift keying Strong atmospheric turbulence Bit error rate multiple-input multiple-output Pointing errors

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Compact MIMO antenna for LTE 2500 and UWB applications

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MICROWAVE AND OPTICAL TECHNOLOGY LETTERS 2015年第9期57卷 2046-2049页

作者： Wu, Yanjie Long, Yunliang Sun Yat Sen Univ Dept Elect & Commun Engn Guangzhou 510275 Guangdong Peoples R China SYSU CMU Shunde Int Joint Res Inst Shunde Guangdong Peoples R China

This letter presents a compact multiple-input multiple-output (MIMO) ultrawideband (UWB) antenna, and this MIMO antenna consists of two coplanar waveguide -fed monopole antenna elements and an improved ground-plane. These two antenna elements are symmetrically arranged on a FR4 substrate with dimensions 33.8 x 29 x 0.8 mm(3). The improved ground-plane has several ground stubs and windows, and they are applied as decoupling structure to improve the isolation as well as impedance matching. Simulation and measurement are used to study the antenna performance, results show that the antenna has a wide impedance bandwidth of 2.2-10.6 GHz with |S-11|-9 dB, low mutual coupling of less than -12 dB and -17 dB over the range of 2.5-4.2 GHz and 5.6-10 GHz, respectively, and LTE 2500 and UWB operation bands can be covered successfully. (c) 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:2046-2049, 2015

关键词： multiple-input multiple-output ultrawideband antenna multiple-input multiple-output antenna wideband antenna

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FIBER-WIRELESS INTEGRATION FOR 80 Gbps POLARIZATION DIVISION multipleXING-16QAM SIGNAL TRANSMISSION AT W-BAND WITHOUT RF DOWN CONVERSION

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MICROWAVE AND OPTICAL TECHNOLOGY LETTERS 2015年第1期57卷 9-13页

作者： Yang, Chao Li, Xinying Xiao, Jiangnan Chi, Nan Yu, Jianjun Fudan Univ Dept Commun Sci & Engn Shanghai 200433 Peoples R China

We propose and experimentally demonstrate a fiber-wireless integration system at W-band (75-100 GHz), and 80-Gbps polarization division multiplexing 16-ary quadrature amplitude modulation (QAM) signal is transmitted in an optical-wireless-optical system for the first time. After 50-km single-mode fiber-28 (single-mode fiber (SMF)-28) transmission, the millimeter-wave signal at 84-GHz is delivered over a 4-m 2 x 2 multiple-input multiple-output wireless link, and finally up-converted to optical signal for another 50-km SMF-28 transmission. With the optical signal-to-noise ratio of 30 dB, the bit error rate is below the forward-error-correction threshold of 3.8 x 10(-3) using cascaded multimodulus algorithm equalization at the receiver. The experimental results indicate that high-order QAM signal can be well suitable for long-haul large-capacity optical-wireless-optical transmission in the proposed system. (c) 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:9-13, 2015

关键词： fiber-wireless integration W-band polarization division multiplexing 16-ary quadrature amplitude modulation multiple-input multiple-output cascaded multimodulus algorithm

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The Feasibility of Interference Alignment for Full-Duplex MIMO Cellular Networks

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IEEE COMMUNICATIONS LETTERS 2015年第9期19卷 1500-1503页

作者： Kim, Kiyeon Jeon, Sang-Woon Kim, Dong Ku Yonsei Univ Sch Elect & Elect Engn Seoul 120749 South Korea Andong Natl Univ Dept Informat & Commun Engn Andong 760749 South Korea

The feasibility condition of interference alignment (IA) for full-duplex (FD) multiple-input multiple-output (MIMO) cellular networks is considered. A necessary condition and a sufficient condition on the IA feasibility are established, characterizing the optimal sum degrees of freedom (DoF) for a broad class of network topologies. The necessary and sufficient condition is shown specially for a class of symmetric network topologies. The results demonstrate that FD operation at the base station with appropriate IA is able to improve the sum DoF than the conventional half-duplex operation.

关键词： Degrees of freedom full-duplex interference alignment multiple-input multiple-output

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Transmit Radiation Pattern Invariance in MIMO Radar With Application to DOA Estimation

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IEEE SIGNAL PROCESSING LETTERS 2015年第10期22卷 1609-1613页

作者： Hassanien, Aboulnasr Vorobyov, Sergiy A. Khabbazibasmenj, Arash Villanova Univ Ctr Adv Commun Villanova PA 19085 USA Aswan Univ Dept Elect Engn Aswan Egypt Aalto Univ Dept Signal Proc & Acoust FI-00076 Espoo Finland UCIC Toronto ON Canada

The desired property of having the same beampattern for different columns of a beamspace transformation matrix (beamforming vectors) often plays a key importance in practical applications. At most 2(M-1) -1 beamforming vectors with the same beampattern can be generated from any given beamforming vector, where M is the size of the beamforming vector. Thus, one can start with a single (mother) beamforming vector, which gives a desired beampattern, but may not satisfy some other desired properties, and generate all other beamforming vectors, which give the same beampattern, in a computationally efficient way. Then the beamforming vectors, which in addition satisfy other desired properties that the mother beamforming vector may not satisfy, can be selected. Such procedure is developed in this letter in the application to the transmit beamspace design that ensures practically important properties for multiple-input multiple-output radar. A computationally efficient sub-optimal method for selecting best beamforming vectors from a population of vectors that give the same beampattern is also developed.

关键词： Array processing beamforming beampattern design dimensionality reduction multiple-input multiple-output (MIMO) radar

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On the 3-D MIMO Channel Model Based on Regular-Shaped Geometry-Based Stochastic Model

On the 3-D MIMO Channel Model Based on Regular-Shaped Geomet...

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International Symposium on Antennas and Propagation (ISAP)

作者： Chen, Jiali Wu, Shuang Liu, Shuaijun Wang, Chaowei Wang, Weidong Beijing Univ Posts & Telecommun Key Lab Universal Wireless Commun Minist Educ Informat & Elect Technol Lab Beijing Peoples R China

ISBN: (纸本)9784885523021

This paper proposes a novel three-dimension multiple-input multiple-output (MIMO) channel model based on Regular-Shaped Geometry-Based Stochastic Model (RS-GBSM), which is called Geometrical Multi-Ellipsoid Based Stochastic Model (GMEBSM). Scatterers are assumed to be distributed on the surface of the ellipsoids whose foci are at the center of transmitter and receiver ends. Ellipsoids with different propagation delays are assumed to obey exponential distribution. By using the von Mises Fisher (VMF) distribution, the proposed model has the ability to jointly consider the azimuth and elevation angles. Assuming in 3-D non-isotropic scatting model, the expression for the space-time correlation function (STCF) between each two sub channels is derived. Finally, simulation results of the derived CF are presented.

关键词： Channel modeling multiple-input multiple-output Angle of Arrival space-time correlation function geometry-based stochastic model

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Mi-MMAC: MIMO-Based Multi-Channel MAC Protocol for WLAN 11

Mi-MMAC: MIMO-Based Multi-Channel MAC Protocol for WLAN

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Proceedings of the 11th EAI International Conference on Heterogeneous Networking for Quality, Reliability, Security and Robustness

作者： Yang, Bo Li, Bo Yang, Mao Yan, Zhongjiang Zuo, Xiaoya Northwestern Polytech Univ Sch Elect & Informat Xian Peoples R China

ISBN: (纸本)9781631900631

In order to meet the proliferating demands in wireless local area networks (WLANs), the multi-channel media access control (MMAC) technology has attracted a considerable attention to exploit the increasingly scarce spectrum resources more efficiently. This paper proposes a novel multi-channel MAC to resolve the congestion on the control channel, named as Mi-MMAC, by multiplexing the control-radio and the data-radio as a multiple-input multiple-output (MIMO) array, working on both the control channel and the data channels alternately. Furthermore, we model Mi-MMAC as an M/M/k queueing system and obtain a closed-form approximate formula of the saturation throughput. Simulation results validate our model and analysis, and we demonstrate that the saturation throughput gain of the proposed protocol is close to 3.3 times compared with the dynamical channel assignment (DCA) protocol [1] under the few collisions condition.

关键词： Media access control multiple-input multiple-output Multi-channel Wireless LAN

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