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Liquid level control in two tanks spherical interacting system with fractional order proportional integral derivative controller using hybrid technique: A hybrid technique

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ADVANCES IN ENGINEERING SOFTWARE 2023年 175卷

作者： Arivalahan, R. Tamilarasan, P. Kamalakannan, M. SRM Valliammai Engn Coll Dept Elect & Elect Engn Kattankulathur India Pwsim Engn Solut Pvt Ltd Bengaluru India

This paper proposes a Liquid Level Control in two tanks spherical interacting system (TTSIS) with Fractional Order Proportional Integral Derivative (FOPID) controller using hybrid system. The proposed approach is the consolidation of chaotic Henry gas solubility optimization (CHGSO) and Feedback Artificial tree (FAT), and later it is known as CHGSO-FAT technique. The FOPID controller is modeled as Fractional Order System for a spherical tank's liquid level control. The Spherical tank system is important in nonlinear operation, because its variation on the radius of tank and the interaction of the two tanks with FOPID sliding surface. Moreover, FOPID controller is proposed the system output is directly used to tune the system parameters. The proposed controller is enhanced by increasing the fractional values of the derivative term FOPID sliding surface. The performance indices, as settling time, rise time, peak overshoot and peak time is analyzed. The proposed system is performed on MATLAB/Simulink working platform. The mean, median and standard deviation for 100 iterations with proposed system is 0.338, 0.4173 and 0.00334.

关键词： Chaotic Henry gas solubility optimization Feedback artificial tree Fractional-order proportional integral derivative multiple-input multiple-output

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Transceiver Impairment Mitigation by 8x2 Widely Linear MIMO Equalizer With Independent Complex Filtering on IQ Signals

IEEE PHOTONICS JOURNAL

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IEEE PHOTONICS JOURNAL 2022年第3期14卷 1页

作者： Sato, Masaki Arikawa, Manabu Noguchi, Hidemi Matsui, Junichiro Abe, Junaichi de Gabory, Emmanuel Le Taillandier NEC Corp Ltd Syst Platform Res Labs Kawasaki Kanagawa 2118666 Japan NEC Corp Ltd Network Solut Div 1 Chiba 2701198 Japan

High-order modulation formats with high symbol rates are promising candidates for meeting the growing traffic requirements of digital coherent transmission. In using these modulation formats, the impact of transceiver impairment on the signal quality becomes significant. In this paper, we propose an 8x2 widely linear (WL) multiple-input multiple-output (MIMO) equalizer with independent complex filtering on IQ signals to mitigate linear transceiver impairments. Furthermore, we extend the equalizer for digital subcarrier (SC) multiplexing. Accordingly, a 16x4 WL MIMO equalizer is also proposed to mitigate linear transceiver impairments, through application to a pair of SC inputs. Experimental results show that, for transmission of a 58-GBaud polarization-multiplexing 64 quadrature amplitude modulation (PM-64QAM) single-carrier signal, the proposed method effectively compensates for various receiver impairments and also mitigates transmitter (Tx) impairments. Q-penalties of 0.1 dB up to a 10-ps skew, 2.5-dB gain imbalance, 7.2-degree phase error, and -15-dB crosstalk in Tx were achieved for 100-km standard single-mode fiber transmission. Moreover, for a 29-GBaud PM-64QAM dual-SC signal, the proposed 16 x 4 WL MIMO equalizer shows transceiver impairment mitigation performance similar to that in the single-carrier case, even though dual-SC transmission is less tolerant of laser phase noise.

关键词： Equalizers MIMO communication Transceivers Symbols Phase locked loops Demodulation Phase noise Digital coherent transmission digital signal processing multiple-input multiple-output optical fiber communication quadrature amplitude modulation

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Passive MIMO Radar Detection with Unknown Colored Gaussian Noise

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REMOTE SENSING 2021年第14期13卷 2708-2708页

作者： Liu, Yongjun Liao, Guisheng Li, Haichuan Zhu, Shengqi Li, Yachao Yin, Yingzeng Xidian Univ Natl Lab Radar Signal Proc Xian 710071 Peoples R China Xidian Univ Natl Key Lab Antennas & Microwave Technol Xian 710071 Peoples R China

The target detection of the passive multiple-input multiple-output (MIMO) radar that is comprised of multiple illuminators of opportunity and multiple receivers is investigated in this paper. In the passive MIMO radar, the transmitted signals of illuminators of opportunity are totally unknown, and the received signals are contaminated by the colored Gaussian noise with an unknown covariance matrix. The generalized likelihood ratio test (GLRT) is explored for the passive MIMO radar when the channel coefficients are also unknown, and the closed-form GLRT is derived. Compared with the GLRT with unknown transmitted signals and channel coefficients but a known covariance matrix, the proposed method is applicable for a more practical case whenthe covariance matrix of colored noise is unknown, although it has higher computational complexity. Moreover, the proposed GLRT can achieve similar performance as the GLRT with the known covariance matrix when the number of training samples is large enough. Finally, the effectiveness of the proposed GLRT is verified by several numerical examples.

关键词： radar detection passive radar colored Gaussian noise generalized likelihood ratio test multiple-input multiple-output

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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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Accelerated Nonlinear Multichannel Ultrasonic Tomographic Imaging Using Target Sparseness

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IEEE TRANSACTIONS ON IMAGE PROCESSING 2014年第3期23卷 1379-93页

作者： Dong, Chengdong Jin, Yuanwei Lu, Enyue Shanghai Univ Finance & Econ Dept Appl Math Shanghai 200433 Peoples R China Univ Maryland Eastern Shore Dept Engn & Aviat Sci Princess Anne MD 21853 USA Salisbury Univ Dept Math & Comp Sci Salisbury MD 21801 USA

This paper presents an accelerated iterative Landweber method for nonlinear ultrasonic tomographic imaging in a multiple-input multiple-output (MIMO) configuration under a sparsity constraint on the image. The proposed method introduces the emerging MIMO signal processing techniques and target sparseness constraints in the traditional computational imaging field, thus significantly improves the speed of image reconstruction compared with the conventional imaging method while producing high quality images. Using numerical examples, we demonstrate that incorporating prior knowledge about the imaging field such as target sparseness accelerates significantly the convergence of the iterative imaging method, which provides considerable benefits to real-time tomographic imaging applications.

关键词： Ultrasonic tomography accelerated projected steepest descent method sparsity constraints multiple-input multiple-output inverse problems

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Shared radiator based high-isolated tri-port mobile terminal antenna group design

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INTERNATIONAL JOURNAL OF RF AND MICROWAVE COMPUTER-AIDED ENGINEERING 2022年第7期32卷 e23177-e23177页

作者： Huang, He Jiang, Wen Zhang, Tiancheng Zhu, Yunze Pang, Bo Hu, Wei Xidian Univ Natl Key Lab Antennas & Microwave Technol Xian Peoples R China

This article proposes a high-isolated tri-port antenna group for 5G mobile terminals based on the shared radiator and mode orthogonality technology, which is realized by exciting the two orthogonal currents through two ports on a shared loop radiator and a patch antenna orthogonal to the loop on the back of the mobile terminal. The -6 dB impedance bandwidth of the three ports in the antenna group could cover the 3.4-3.6 GHz 5G band, while the isolation is above 20 dB within the antenna group, a very compact volume. In addition, a 12 x 12 MIMO antenna is proposed by integrating four antenna groups. The MIMO antenna still has measured isolation above 18 dB and efficiency above 50% over the operation band thanks to the orthogonal decoupling design. A good multiplexing performance is also achieved with the ECC of <0.08 and peak channel capacity of 60.29 bps/Hz at 20 dB SNR.

关键词： high isolation multiple-input multiple-output shared radiator tri-port antenna group

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Spectral efficient designs of MIMO-based CR-NOMA for Internet of Things Networks

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INTERNATIONAL JOURNAL OF COMMUNICATION SYSTEMS 2021年第12期34卷 e4888-e4888页

作者： Thakur, Prabhat Singh, Ghanshyam Univ Johannesburg Dept Elect & Elect Engn Sci Auckland PkKingsway Campus ZA-2006 Johannesburg South Africa

Due to rapid increase in the wireless-connected Internet-of-things (IoT) devices, the communication among devices is a critical task as it relies on the radio-frequency spectrum, which is a limited resource. Therefore, additional spectral efficient communication designs are required for future IoT networks. By keeping this in mind, we have exploited individually spectral efficient technologies such as the cognitive radio (CR), non-orthogonal multiple access (NOMA), and multiple-input multiple-output (MIMO) simultaneously that is MIMO-based CR-NOMA (MIMO-CR-NOMA) and have proposed as well as analyzed a potential framework for its downlink scenario. The closed-form expressions for the throughput at each user due to the number of transmitting and receiving antennas are derived numerically. Further, we have derived mathematical expressions for the sum throughput of different frameworks such as CR-NOMA, CR-MIMO, and MIMO-CR-NOMA systems. Moreover, the proposed frameworks are simulated, and the relationship between two NOMA users each with multiple antennas is illustrated with simulation results.

关键词： cognitive radio Internet-of-things non-orthogonal multiple access multiple-input multiple-output spectrum sensing spectral efficiency throughput

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On the secrecy performance of transmitreceive diversity and spatial multiplexing systems

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PEERJ COMPUTER SCIENCE 2019年第4期5卷 e186-e186页

作者： Maichalernnukul, Kiattisak Rangsit Univ Coll Digital Innovat & Informat Technol Pathum Thani Thailand

Emerging from the information-theoretic characterization of secrecy, physical-layer security exploits the physical properties of the wireless channel for security purpose. In recent years, a great deal of attention has been paid to investigating the physical-layer security issues in multiple-input multiple-output (MIMO) wireless communications. This paper analyzes the secrecy performance of transmit-receive diversity system and spatial multiplexing systems with zero-forcing equalization and minimum meansquare-error equalization. Specifically, exact and asymptotic closed-form expressions are derived for the secrecy outage probability of such MIMO systems in a Rayleigh fading environment, and the corresponding secrecy diversity orders and secrecy array gains are determined. Numerical results are presented to corroborate the analytical results and to examine the impact of various system parameters, including the numbers of antennas at the transmitter, the legitimate receiver, and the eavesdropper. These contributions bring about valuable insights into the physical-layer security in MIMO wireless systems.

关键词： Physical-layer security Secrecy outage probability Transmit-receive diversity multiple-input multiple-output Spatial multiplexing

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MIMO optical wireless communication via monolithic or sparse apertures

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JOURNAL OF OPTICS 2018年第2期20卷 024017-024017页

作者： Safari, Majid Huang, Shenjie Univ Edinburgh Li Fi R&D Ctr Edinburgh EH9 3JL Midlothian Scotland Univ Edinburgh Inst Digital Commun Sch Engn Edinburgh EH9 3JL Midlothian Scotland

In this paper, a general optical wireless communication (OWC) system impaired by atmospheric turbulence is studied. It is shown that if the geometry of the overall OWC system lies in the near-field regime, it can benefit from the advantages of a full multiple-input multiple-output (MIMO) system whether it is implemented by monolithic or sparse apertures. A unified framework is presented to analyze such MIMO OWC systems and their achievable diversity and multiplexing gains are estimated. Moreover, assuming that the size of OWC transceivers and the number of utilized degrees of freedom are constrained, the performance of MIMO OWC systems using monolithic or sparse apertures are compared. The results show that the multiplexing systems with monolithic apertures outperform those with sparse apertures in weaker turbulence conditions but it is expected that their superiority vanishes in the presence of strong turbulence. In terms of spatial diversity, the two design approaches provide similar gains.

关键词： optical wireless communications free-space optical communications multiple-input multiple-output spatial multiplexing spatial diversity degrees of freedom atmospheric turbulence

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