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From Terahertz Imaging to Terahertz Wireless Communications Review

Yi Huang,Yaochun Shen,Jiayou Wang

Engineering 2023, Volume 22, Issue 3, Pages 106-124 doi: 10.1016/j.eng.2022.06.023

Abstract:

Terahertz (THz) technology is probably best known to the public as a powerful tool for imaging, sinceWith the roll-out of 5G mobile networks, research into 6G wireless communications is heating up.It is envisioned that THz technology will be used for 6G and future wireless communications.In this paper, we review how THz technology has been employed for imaging and wireless communicationsThe possibility of integrating THz imaging/sensing and wireless communications is considered, and challenges

Keywords： Communications Imaging Terahertz technology Wireless communications

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A high-precision terahertz retrodirective antenna array with navigation signal at a different frequency Correspondence

Zhong-bo ZHU, Wei-dong HU, Tao QIN, Sheng LI, Xiao-jun LI, Jiang-jie ZENG, Xian-qi LIN, Leo P. LIGTHART

Frontiers of Information Technology & Electronic Engineering 2020, Volume 21, Issue 3, Pages 377-383 doi: 10.1631/FITEE.1900581

Abstract: Future communications will provide higher transmission rates and higher operating frequencies.The terahertz retrodirective antenna array proposed and discussed in this paper can be a better solution

Keywords： Terahertz Retrodirective antenna array Terahertz communications Conjugate mixing

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Progress in terahertz nondestructive testing: A review

Shuncong ZHONG

Frontiers of Mechanical Engineering 2019, Volume 14, Issue 3, Pages 273-281 doi: 10.1007/s11465-018-0495-9

Abstract: Terahertz (THz) waves, whose frequencies range between microwave and infrared, are part of the electromagnetic

Keywords： terahertz pulsed imaging (TPI) nondestructive testing (NDT) composite material thermal barrier coating

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Time of flight improved thermally grown oxide thickness measurement with terahertz spectroscopy

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 4, doi: 10.1007/s11465-022-0705-3

Abstract: As a nondestructive testing technique, terahertz time-domain spectroscopy technology is commonly usedA simulative investigation on propagation characteristics of terahertz shows the linear relationship

Keywords： thermal barrier coatings thermally grown oxide terahertz spectroscopy time of flight

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Standardization of 6G Key Technologies: Thoughts and Suggestions

Luo Yan, Quan Wei, Zhang Hongke

Strategic Study of CAE 2023, Volume 25, Issue 6, Pages 18-26 doi: 10.15302/J-SSCAE-2023.06.003

Abstract: standardization of computing power networks, blockchain, digital twins, artificial intelligence, and holographic communicationsChina can make plans in advance for the standardization of 6G key technologies, focusing on terahertz

Keywords： 6G standards establishment terahertz computing power network communications and perception integration

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Distinct mononuclear diploid cardiac subpopulation with minimal cell–cell communications persists in

Frontiers of Medicine 2023, Volume 17, Issue 5, Pages 939-956 doi: 10.1007/s11684-023-0987-9

Abstract: paths were identified: two switching to cardiomyocytes (CM) maturation with close CM–fibroblast (FB) communicationsand one maintaining MNDCM status with least CM–FB communications.having interactions with macrophages and non-proliferative MNDCMs (non-pMNDCMs) with minimal cell–cell communicationsIn conclusion, a novel non-pMNDCM subpopulation with minimal cell–cell communications was unveiled, highlighting

Keywords： mononuclear diploid cardiomyocytes cell–cell communication cardiac fibroblast single-cell RNA sequencing cardiac regeneration

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Terahertz time-domain spectroscopy of high-pressure flames

Jason BASSI, Mark STRINGER, Bob MILES, Yang ZHANG

Frontiers in Energy 2009, Volume 3, Issue 2, Pages 123-133 doi: 10.1007/s11708-009-0033-x

Abstract: concentrations render flames opaque to visible light, but they remain transparent to far-infrared or terahertz

Keywords： terahertz time-domain spectroscopy high-pressure flames H₂O absorption lines

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Technical Scheme and Key Equipment for Solving the Difficult Technical Problems of Underground Radio Communications

Situ Mengtian

Strategic Study of CAE 2001, Volume 3, Issue 7, Pages 64-69

Abstract:

Two difficult tedhnical problems in underground radio communications, i.e. weak signal reception and

Keywords： underground radio communications weak signal reception counter lightning interference

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Synthesized All-Pass Waveguide for Ultrafast Electronics Article

Desong Wang,Ke Wu

Engineering 2023, Volume 30, Issue 11, Pages 49-54 doi: 10.1016/j.eng.2023.04.005

Abstract: waveguides for use in ultrabroad frequency ranges (direct current (DC)-to-millimeter-wave and DC-to-terahertz

Keywords： All-pass waveguide Ultrashort pulse Picosecond transmission Ultrafast electronics Terahertz technology

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An Internet-of-Things Initiative for One Belt One Road (OBOR)

Li Da Xu

Frontiers of Engineering Management 2016, Volume 3, Issue 3, Pages 206-223 doi: 10.15302/J-FEM-2016039

Abstract: A wide range of industrial Internet of Things (IoT) applications have been developed and deployed in recent years. IoT has provided a promising opportunity to build powerful industrial systems and applications by leveraging the growing ubiquity of RFID, wireless, mobile and sensor devices. In an effort to understand the development of IoT in industries, this paper reviews the current research of IoT, key enabling technologies, major IoT applications in industries, and identifies research trends and challenges. As IoT has received support from governments and businesses across the globe, IoT will also greatly impact One Belt One Road (OBOR) in foreseeable future.

Keywords： Internet of Things (IoT) RFID Wireless Sensor Networks Near Field Communications ICT

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Reconfigurable intelligent surfaces for wireless communications Editorial

Qiang CHENG,Shi JIN,Tie Jun CUI

Frontiers of Information Technology & Electronic Engineering 2023, Volume 24, Issue 12, Pages 1665-1668 doi: 10.1631/FITEE.2320000

Abstract: Reconfigurable intelligent surface (RIS) is a two-dimensional artificial material with reconfigurable electromagnetic characteristics. Since the phase, amplitude, polarization, and frequency responses of electromagnetic waves at each element can be independently adjusted by changing the biasing signals of tunable devices embedded in the RIS elements, it is possible to reshape the wavefront of the spatial electromagnetic waves in a programmable way. Therefore, RIS provides powerful capability to control the wireless propagation environment and improve the performance of wireless communication networks, along with the advantages of low complexity, simple structure, and low cost, showing great potentials for many applications including wireless coverage extension, wireless coverage enhancement, and wireless system capacity improvement. There are several important technical points in the development of RIS-aided wireless communication technology.

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Convergence to real-time decision making

James M. TIEN

Frontiers of Engineering Management 2020, Volume 7, Issue 2, Pages 204-222 doi: 10.1007/s42524-019-0040-5

Abstract: Real-time decision making reflects the convergence of several digital technologies, including those concerned with the promulgation of artificial intelligence and other advanced technologies that underpin real-time actions. More specifically, real-time decision making can be depicted in terms of three converging dimensions: Internet of Things, decision making, and real-time. The Internet of Things include tangible goods, intangible services, ServGoods, and connected ServGoods. Decision making includes model-based analytics (since before 1990), information-based Big Data (since 1990), and training-based artificial intelligence (since 2000), and it is bolstered by the evolving real-time technologies of sensing (i.e., capturing streaming data), processing (i.e., applying real-time analytics), reacting (i.e., making decisions in real-time), and learning (i.e., employing deep neural networks). Real-time includes mobile networks, autonomous vehicles, and artificial general intelligence. Central to decision making, especially real-time decision making, is the ServGood concept, which the author introduced in an earlier paper (2012). It is a physical product or good encased by a services layer that renders the good more adaptable and smarter for a specific purpose or use. Addition of another communication sensors layer could further enhance its smartness and adaptiveness. Such connected ServGoods constitute a solid foundation for the advanced products of tomorrow which can further display their growing intelligence through real-time decisions.

Keywords： decision making services goods ServGoods Big Data Internet of Things artificial intelligence wireless communications

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Target parameter estimation for OTFS-integrated radar and communications based on sparse reconstruction Research Article

Zhenkai ZHANG, Xiaoke SHANG, Yue XIAO,zhangzhenkai@just.edu.cn

Frontiers of Information Technology & Electronic Engineering 2024, Volume 25, Issue 5, Pages 742-754 doi: 10.1631/FITEE.2300462

Abstract: ; (OTFS) is a new modulation technique proposed in recent years for high Doppler wireless scenes. To solve the parameter estimation problem of the OTFS-, we propose a parameter estimation method based on preprocessing to reduce the computational effort of the traditional (WSF) algorithm. First, an OTFS-integrated echo signal model is constructed. Then, the echo signal is transformed to the time domain to separate the target angle from the range, and the range and angle of the detected target are coarsely estimated by using the algorithm. Finally, the WSF algorithm is used to refine the search with the coarse estimate at the center to obtain an accurate estimate. The simulations demonstrate the effectiveness and superiority of the proposed parameter estimation algorithm.

Keywords： Integrated radar and communications system Orthogonal time– frequency space Target parameter estimation

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China Needs High-speed Magnetically Levitated Train

Yan Luguang

Strategic Study of CAE 2000, Volume 2, Issue 5, Pages 8-13

Abstract:

The development, main features and advantages of the high-speed magnetically levitated train are shortly described. It is particularly suitable for the development of the future high-speed passenger transportation network in China. Some suggestions to develop high-speed magnetically levitated train technology in China are presented.

Keywords： magnetically levitated train high-speed passenger transportation communications and transportation

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An Adaptive Demodulation Method for BPSK Signals

Li Yanxin,Hu Aiqun,Song Yubo

Strategic Study of CAE 2006, Volume 8, Issue 5, Pages 49-51

Abstract:

The paper presents a novel method for demodulating the binary phase shift keying (BPSK) signals basing on adaptive filtering. The commonly used least mean square (LMS) error adaptive filtering algorithm is employed for studying the demodulating procedure and the performance of the novel adaptive BPSK demodulation. The novel adaptive BPSK demodulation does not need the adaptive filter completing convergence. The performance of the method in theory is compared with computer simulating results. It shows that the error rates in simulation agree well with that in theory. Also, it is indicated that the demodulation method has many advantages over conventional ones, such as the powerful anti-noise ability, the small transfer delay, and the convenient implementation with DSP technology, and has lower error rates than correlation modulation at the same sample rate.

Keywords： digital communications adaptive signal processing demodulation BPSK