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Analysis of MRT/MRC diversity techniques to enhance the detection performance for MIMO signals in full-duplex wireless relay networks with transceiver hardware impairment

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PHYSICAL COMMUNICATION 2020年 42卷 101132-101132页

作者： Ba Cao Nguyen Nguyen-Kieu, Tam Tran Manh Hoang Tran, Phuong T. Voznak, Miroslav Telecommun Univ Nhatrang Vietnam VSB Tech Univ Ostrava 17 Listopadu 15-2172 Ostrava 70833 Czech Republic Ton Duc Thang Univ Fac Elect & Elect Engn Wireless Commun Res Grp Ho Chi Minh City Vietnam

In this paper, we investigate the detection performance for MIMO signals in a wireless full-duplex (FD) relaying network, in which the diversity techniques, including maximal ratio transmission (MRT) at source and maximal ratio combining (MRC) at destination, are applied. Especially, we rigorously study the impact of hardware impairment (HI) at all nodes and the residual self-interference (RSI) at the FD relay (FDR), which have not mentioned in previous works. Here, the closed-form expressions of key performance factors such as outage probability (OP), throughput, and symbol error rate (SER) of the considered MIMO-FDR system with HI are derived mathematically. All analytical expressions are validated by Monte Carlo simulations. Numerical results demonstrate a strong impact of HI on OP, throughput, and SER of the MIMO-FDR system in comparison with the ideal (ID) MIMO-FDR system, especially at high data rate. The combination of HI and RSI prevents OP and SER of the MIMO-FDR system from going lower than some error floors even at high signal-to-noise ratio (SNR) regime. However, by using MRT/MRC techniques with larger number of transmit antennas at source than the number of receive antennas at destination, the OP and SER performance in HI condition can be significantly improved. (C) 2020 Elsevier B.V. All rights reserved.

关键词： multiple-input multiple-output Full-duplex Hardware impairment MRT/MRC Self-interference cancellation Outage probability Symbol error rate

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Performance of an adaptive compander in wireless mobile communication systems

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INTERNATIONAL JOURNAL OF MOBILE COMMUNICATIONS 2019年第5期17卷 625-639页

作者： Beena, A. O. Pillai, Sakuntala S. Saintgits Coll Engn Dept Elect & Commun Engn Kottukulam HillsPathamuttom PO Kottayam 686532 Kerala India Mar Baselios Coll Engn & Technol Dept Elect & Commun Engn Thiruvananthapuram 695015 Kerala India

The most popular technique used for high data rate services in 4G scenario is MIMO-OFDM. Space-time block codes have been recommended for high diversity gain in MIMO communication systems. Due to comparatively simpler design and less decoding complexity orthogonal STBCs are very attractive. In this paper, we propose a novel adaptive companding method for peak to average power ratio reduction in IEEE 802.16 standards used in 4G wireless mobile communications with orthogonal space time block coded MIMO-OFDM systems. This is obtained by fixing compander parameters independently for statistically unrelated symbols in OFDM waveform and according to the features of input symbols. The bit error rate performance analysis of the proposed system under Rayleigh fading MIMO channel conditions has also been presented. Simulation results showed that the proposed method performs better for a given PAPR preset value and a slight improvement in the BER performance was observed over fixed compander.

关键词： multiple-input multiple-output orthogonal frequency division multiplexing orthogonal space time block codes OSTBC peak to average power ratio PAPR adaptive companding QAM BER

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Developing the First mmWave Fully-Connected Hybrid Beamformer With a Large Antenna Array

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IEEE ACCESS 2020年 8卷 141282-141291页

作者： Payami, Sohail Khalily, Mohsen Araghi, Ali Loh, Tian Hong Cheadle, David Nikitopoulos, Konstantinos Tafazolli, Rahim Univ Surrey Inst Commun Syst Guildford GU2 7XS Surrey England Natl Phys Lab NPL 5G & Future Commun Technol Grp Teddington TW11 0LW Middx England

Millimeter wave (mmWave) systems with effective beamforming capability play a key role in fulfilling the high data-rate demands of current and future wireless technologies. Hybrid analog-to-digital beamformers have been identified as a cost-effective and energy-efficient solution towards deploying such systems. Most of the existing hybrid beamforming architectures rely on a subconnected phase shifter network with a large number of antennas. Such approaches, however, cannot fully exploit the advantages of large arrays. On the other hand, the current fully-connected beamformers accommodate only a small number of antennas, which substantially limits their beamforming capabilities. In this article, we present a mmWave hybrid beamformer testbed with a fully-connected network of phase shifters and adjustable attenuators and a large number of antenna elements. To our knowledge, this is the first platform that connects two RF inputs from the baseband to a 16 x 8 antenna array, and it operates at 26 GHz with a 2 GHz bandwidth. It provides a wide scanning range of 60 degrees, and the flexibility to control both the phase and the amplitude of the signals between each of the RF chains and antennas. This beamforming platform can be used in both short and long-range communications with linear equivalent isotropically radiated power (EIRP) variation between 10 dBm and 60 dBm. In this article, we present the design, calibration procedures and evaluations of such a complex system as well as discussions on the critical factors to consider for their practical implementation.

关键词： Millimeter wave multiple-input multiple-output fully-connected hybrid beamforming phased array antenna testbed

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Transmission over Gaussian MIMO half-duplex relay channel

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PHYSICAL COMMUNICATION 2020年 40卷 101089-101089页

作者： Al-qudah, Zouhair Alqudah, Amin Darabkh, Khalid A. Al Hussein Bin Talal Univ Maan Commun Engn Dept Maan Jordan Yarmouk Univ Irbid Comp Engn Dept Irbid Jordan Univ Jordan Amman Comp Engn Dept Amman Jordan

In this work, we investigate the Gaussian multiple-input multiple-output (MIMO) half-duplex relay channel. We firstly propose a two-phase transmission scheme which helps us in deriving the bounds on the achievable rate. In this transmission scheme, particularly in the first phase, the relay partially listens to the source until it can fully decode its signal. In the second phase, in coherence with the source, the relay forwards the source's signal into its destination. Thereafter, an outer bound and inner bound are derived for the Gaussian MIMO half-duplex relay channel. In particular, we determine the condition under which the capacity is obtained. Furthermore, many numerical examples are presented to primarily not only show that the achievable rate, that we derive, is larger than the available results in the literature, but also illustrate how the bounds on the achievable capacity vary with the duration of the first phase. Additionally, we show how sensitive the duration of the first phase is to the number of the transmit and/or receive antennas. (C) 2020 Elsevier B.V. All rights reserved.

关键词： Dynamic decode and forward Relay channel multiple-input multiple-output Half-duplex

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Microwave and Millimeter-Wave MIMO Antenna Using Conductive ITO Film

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IEEE ACCESS 2020年 8卷 207024-207033页

作者： So, Kwok Kan Chen, Bao-Jie Chan, Chi Hou City Univ Hong Kong State Key Lab Terahertz & Millimeter Waves Hong Kong Peoples R China City Univ Hong Kong Dept Elect Engn State Key Lab Terahertz & Millimeter Waves Hong Kong Peoples R China

This paper will present a novel design of optically transparent multiple-input multiple-output (MIMO) antenna made by indium tin oxide (ITO) films. The MIMO antenna involves patch and monopole antenna elements at 4.9 GHz and 26 GHz respectively. The upper and lower surface of the MIMO antenna are covered by a thin film of glass substrate with conductive ITO coatings, while top layer is radiating elements and the bottom layers is ground planes. Both patch and monopole antennas are fed by transparent 50 Omega transmission lines. The prototypes were fabricated by an in-house photolithography process. Measurements are carried out to confirm the simulation. The characteristics showed that the proposed MIMO antenna can be considered as a potential antenna for 5G smartphone communications applications.

关键词： multiple-input multiple-output indium tin oxide patch monopole glass 5G smartphone

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Optical Camera Communications for IoT-Rolling-Shutter Based MIMO Scheme with Grouped LED Array Transmitter

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SENSORS 2020年第12期20卷 3361.-3361.页

作者： Teli, Shivani Rajendra Matus, Vicente Zvanovec, Stanislav Perez-Jimenez, Rafael Vitek, Stanislav Ghassemlooy, Zabih Czech Tech Univ Fac Elect Engn Prague 16627 Czech Republic Univ Las Palmas Gran Canaria Inst Technol Dev & Innovat Commun Las Palmas Gran Canaria 35001 Spain Northumbria Univ Opt Commun Res Grp Newcastle Upon Tyne NE1 7RU Tyne & Wear England

In optical camera communications (OCC), the provision of both flicker-free illumination and high data rates are challenging issues, which can be addressed by utilizing the rolling-shutter (RS) property of the image sensors as the receiver (Rx). In this paper, we propose an RS-based multiple-input multiple-output OCC scheme for the Internet of things (IoT) application. A simplified design of multi-channel transmitter (Tx) using a 7.2 x 7.2 cm(2) small 8 x 8 distributed light emitting diode (LED) array, based on grouping of LEDs, is proposed for flicker-free transmission. We carry out an experimental investigation of the indoor OCC system by employing a Raspberry Pi camera as the Rx, with RS capturing mode. Despite the small area of the display, flicker-free communication links within the range of 20-100 cm are established with data throughput of 960 to 120 bps sufficient for IoT. A method to extend link spans up to 1.8 m and the data throughput to 13.44 kbps using different configurations of multi-channel Tx is provided. The peak signal-to-noise ratio of similar to 14 and 16 dB and the rate of successfully received bits of 99.4 and 81% are measured for the shutter speeds of 200 and 800 mu s for a link span of 1 m, respectively.

关键词： optical camera communications rolling-shutter camera Internet of things multiple-input multiple-output light-emitting diodes

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Energy Efficient Transceiver Design in MIMO Interference Channels: The Selfish, Unselfish, Worst-Case, and Robust Methods

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IEEE TRANSACTIONS ON COMMUNICATIONS 2019年第8期67卷 5377-5389页

作者： Vaezy, Hossein Omidi, Mohammad Javad Naghsh, Mohammad Mahdi Yanikomeroglu, Halim Isfahan Univ Technol Dept Elect & Comp Engn Esfahan *** Iran Carleton Univ Dept Syst & Comp Engn Ottawa ON K1S 5B6 Canada

This paper is concerned with the energy efficiency maximization problem in multiple-input multiple-output interference channels. In the first part of this paper, we design the transmit beamforming matrices based on three approaches. In the first approach, each user tries to maximize their own energy efficiency, resulting in what we call the selfish method. The maximization problem corresponding to the selfish method can be implemented in a distributed manner with a semi-closed-form solution. The second approach aims to maximize the weighted sum-energy efficiency;we refer to it as the unselfish method. The proposed unselfish method has the following advantages. 1) It is easily implementable as the problem can be divided into several sub-problems and solved in a distributed manner. 2) It results in a quadratically constrained quadratic program with a semi-closed-form solution. Also, we consider fairness with the minimum-energy efficiency maximization problem, an approach that results in what we call the worst-case method. In the second part, general energy efficiency maximization in the presence of norm-bounded channel uncertainty is investigated which leads to a semi-definite program;the resulting method is called the robust method. Finally, the effect of the system parameters is evaluated through simulations.

关键词： Interference channel multiple-input multiple-output precoder energy efficiency

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Compact planar near-field resonant parastic antenna for multiple-input multiple-output applications

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MICROWAVE AND OPTICAL TECHNOLOGY LETTERS 2012年第3期54卷 580-584页

作者： Lin, Chia-Ching Jin, Peng Ziolkowski, Richard W. Univ Arizona Dept Elect & Comp Engn Tucson AZ 85721 USA Ruckus Wireless Sunnyvale CA 94085 USA Broadcom Corp Signal Integr Grp Irvine CA 92617 USA

A planar tri-band near-field resonant parasitic (NFRP) antenna for multiple-input multiple-output (MIMO) applications in the WLAN 2.4/5.2/5.8 GHz bands is presented. The tri-band functionality is obtained by introducing three different resonant parasitic elements near a simple driven element. Good impedance matching, radiation efficiency, and antenna patterns are realized at each of the desired resonant frequencies. Experimental confirmation of the simulated performance is presented. It is demonstrated that an array of these tri-band NFRP antennas obtains good isolation between elements even with small spacing between them. Calculated envelope correlation values are less than 0.12 within the bands of interest. The design methodologies of the tri-band NFRP antenna and the corresponding MIMO array are detailed. (C) 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:580-584, 2012;View this article online at ***. DOI 10.1002/mop.26647

关键词： antenna antenna pattern input impedance multiple-input multiple-output parasitic antenna

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Performance Analysis of a Full-Duplex MIMO Decode-and-Forward Relay System With Self-Energy Recycling

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IEEE ACCESS 2020年 8卷 226248-226266页

作者： Shaikh, Mohd Hamza Naim Bohara, Vivek Ashok Srivastava, Anand Indraprastha Inst Informat Technol Delhi IIIT Del Dept Elect & Commun Engn New Delhi 110020 India

This paper analyzes the performance of the full-duplex (FD) multiple-input-multiple-output (MIMO) decode-and-forward (DF) relay system in the presence of self-energy recycling (S-ER). Specifically, this work proposes an antenna allocation scheme for S-ER as well as analytically evaluates the performance of this proposed scheme in terms of spectral efficiency (SE), energy efficiency (EE), outage and symbol error rate (SER). Since, the self-interference (SI) is a major bottleneck in achieving the true potentials of FD communication, this work considers SI as an energy harvesting opportunity to enhance the EE of the system. The proposed analysis shows that reserving few antennas for S-ER at the FD-MIMO relay improves the EE, however, it reduces the antenna array gain at the relay for information transmission and reception. Thus, a slight degradation in the SE, outage and SER is observed. Further, an adaptive S-ER technique has been proposed which utilizes the antennas corresponding to the least channel gain with respect to information transmission and reception for S-ER. This adaptive S-ER technique improves the EE and also compensates for the slight degradation in the SE, outage and SER through adaptive antenna allocation. Closed-form expressions for the SE, EE, outage and symbol error rate have been derived for these S-ER techniques. In the end, simulations results are provided to validate the efficacy of the theoretical derivations.

关键词： Degradation Simulation Transmitting antennas Recycling Resource management Relays MIMO communication Energy efficiency full-duplex self-energy recycling outage spectral efficiency self-interference symbol error rate antenna allocation transmit antenna selection decode-and-forward relaying multiple-input multiple-output

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Enhancing Spectral Efficiency and BER Performance of Spatial Modulation using Layered Architecture 28

Enhancing Spectral Efficiency and BER Performance of Spatial...

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28th Wireless and Optical Communications Conference (WOCC)

作者： Chaudhry, Saad Amir Zuo, Xiaoya Yao, Rugui Liu, Hailong Mekkawy, Tamer Northwestern Polytech Univ Northwestern Polytech Univ Shenzhen Sch Elect & Informat Res & Dev Inst Xian Shaanxi Peoples R China Northwestern Polytech Univ Sch Comp Sci & Engn Xian Shaanxi Peoples R China Mil Tech Coll Dept Avion Cairo Egypt

ISBN: (纸本)9781728106601

The recent emergence of spatial modulation (SM) as a new modulation concept maneuvers the random and unique properties of the multiple-input multiple-output (MIMO) wireless channels. In this paper, an enhancement in SM scheme is proposed by innovative usage of quadrature amplitude modulation (QAM) to add layers which fully exploit both the signal and spatial domains. Layered spatial modulation (LSM) controls the preset rotated signals with normalized amplitudes to classify the layers and to identify the transmitted symbols at the transceiver by completely avoiding inter-channel interference (ICI). High spectral efficiency can be achieved with the addition of only one transmit antenna for each layer by the LSM scheme. Simulation results show that the proposed method has significant improvement in spectral efficiency and bit-error-rate (BER) performance as compared to other MIMO schemes.

关键词： Spectral efficiency bit-error-rate multiple-input multiple-output quadrature amplitude modulation layered spatial modulation inter-channel interference maximum-likelihood optimal detection

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