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Wei Fan, Lassi Hentilä, Pekka Kyösti,wfa@es.aau.dk
Frontiers of Information Technology & Electronic Engineering 2021, Volume 22, Issue 4, Pages 548-559 doi: 10.1631/FITEE.2000484
Keywords： 空间信道模型；空口测试；无线线缆；多探头电波暗室；FR2验证
Tayyab MEHMOOD, Hina QAYYUM, Salman GHAFOOR
Frontiers of Information Technology & Electronic Engineering 2019, Volume 20, Issue 2, Pages 300-306 doi: 10.1631/FITEE.1700056
A radio-over-fiber (RoF) distributed antenna system (DAS) architecture is proposed, where millimeter wave (mm-wave) signals are transmitted to four different radio access units (RAUs) arranged in a ring topology. The proposed architecture transmits duplex data of 128 Mb/s to each RAU in both downlink (DL) and uplink (UL) directions. The radio frequency (RF) signals are transmitted by polarization multiplexing a multi-wavelength source. Millimeter-wave signals at a frequency of 25 GHz are generated at each RAU using remote heterodyne detection. The proposed architecture provides increased coverage while maintaining good bit error rate (BER) results.
Keywords： Radio over fiber Millimeter wave Radio access units
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
Terahertz (THz) technology is probably best known to the public as a powerful tool for imaging, since it has been applied in security and medical scanning, resulting in numerous impressive images that would be unobtainable using other technologies. With 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 communications, identify state-of-the-art developments in the field, and then examine and compare common devices and issues in both applications. The possibility of integrating THz imaging/sensing and wireless communications is considered, and challenges and future perspectives are presented and discussed. It is shown that THz technology is indeed a key enabling technology for both imaging and wireless communications in the future.
Keywords： Communications Imaging Terahertz technology Wireless communications
Capacity of VoIP in IEEE 802.11 Wireless LAN
Chen Liquan,Hu Aiqun,Zhou Xueli
Strategic Study of CAE 2005, Volume 7, Issue 7, Pages 81-85
Voice transmitted over wireless LAN faces serious challenge because of the fluctuation of the wireless channel. In this paper, the transmission of voice over wireless LAN is firstly analyzed. Taking collision probability into account, the stochastic analysis based on a Markov chain to calculate the upper bound number of simultaneous VoIP calls that can be supported in a single cell of an IEEE 802. llb/a/g network is proposed. The upper bound capacities of G. 711, G. 729 and G. 723.1 code transmitted over 802. llb/a/g are figured out. The simulation results from NS2 simulator have validated the analysis values.
Keywords： wireless LAN voice over IP capacity Markov chain
New 3G System——Mobile Wireless Internet
Hou Ziqiang
Strategic Study of CAE 2002, Volume 4, Issue 7, Pages 86-92
A New 3G broadband mobile wireless Internet has been proposed. New 3G system has some specifications of “Beyond IMT - 2000”，but using 3G frequency and inside 3G framework. Fixed telecommunication operator can cut down the cost of feature rich voice and mobile multimedia services, by using existing fixed broadband IP network infrastructure to deploy broadband mobile wireless Internet. This is opportunity for China to lead the trend of broadband mobile wireless Internet in the world.
Keywords： 3G mobile phone mobile internet broadband mobile wireless internet WLAN TD — LAS mobile IP Ipv6 IP core networks
A comprehensive review of optical wireless power transfer technology Review
Syed Agha Hassnain MOHSAN, Haoze QIAN, Hussain AMJAD,Hassnainagha@zju.edu.cn
Frontiers of Information Technology & Electronic Engineering 2023, Volume 24, Issue 6, Pages 767-800 doi: 10.1631/FITEE.2100443
Keywords： Wireless power transmission Optical wireless power transfer Distributed laser charging Laser diode Solar cell
Ahsan Noor Khan, Young-ok Cha, Henry Giddens, Yang Hao
Engineering 2022, Volume 11, Issue 4, Pages 27-41 doi: 10.1016/j.eng.2021.10.019
Highlights Bioelectronic devices have revolutionized the course of therapeutic treatment with their ability to harness neuronal activities in the human body. Recent advances in the field of soft, stretchable and biocompatible materials have enabled the development of bioelectronics to treat wide range of chronic ailments and disorders. Such treatments involve the confluence of electronics with neuronal cells or tissues, and mostly require surgical operation to implant the bioelectronic device. For recording neural activities and programming the device non-invasively, copious amount of research is in progress to devise wireless technology enabled bioelectronics. This paper discusses the latest developments in wireless bioelectronic devices for organ specific treatments, including gastrointestinal tract monitoring, retinal prosthesis, auditory nerve and brain stimulation. Major highlights include seminal components that mediate the overall wireless operation, such antennas, rectifiers, amplifier and integrated circuits. Moreover, the constituting materials of antennas, operational frequency and their integration with other electronic components are discussed. Replete perspective on the strategies to energize bioelectronics using wireless power transfer is explained. Communication protocols for biotelemetry are also discussed.The integration of electronics and biology has spawned bioelectronics and opened exciting opportunities to fulfill the unmet needs of therapeutic treatments. Recent developments in nanoelectronics and soft and biocompatible materials have shown potential applicability to clinical practices, including physiological sensing, drug delivery, cardiovascular monitoring, and brain stimulation. To date, most bioelectronic devices require wired connections for electrical control, making their implantation complicated and inconvenient for patients. As an alternative, wireless technology is proliferating to create bioelectronics that offer noninvasive control, biotelemetry, and wireless power transfer (WPT). This review paper provides a comprehensive overview of wireless bioelectronics and ongoing developments in their applications for organ-specific treatments, including disorders and dysfunctions. The main emphasis is on delineating the key features of antennas, namely their radiation characteristics, materials, integration with rest of the electronics, and experimental setup. Although the recent progress in wireless mediated bioelectronics is expected to enhance the control of its functionalities, there are still numerous challenges that need to be addressed for commercialization, as well as to address ever-expanding evolving future therapeutic targets.
Keywords： Bioelectronics Neural implants Drug delivery Antennas Wireless power
Pricing Based Adaptive Call Admission Control Algorithm for Wireless Networks
Zhang Xue
Strategic Study of CAE 2006, Volume 8, Issue 4, Pages 32-38
In order to efficiently and effectively control the use of wireless network resources, in this paper, according to the characteristic of adaptive multimedia applications in which bandwidths can be adjusted dynamically, and the influence of pricing on the users' behavior, an adaptive admission control algorithm integrated with pricing is proposed. The algorithm, in with the price is adjusted dynamically based on the current network conditions, is fit for the multi-priorilies services. Attempt is tried to make best balance between the efficiency and simplicity for the pricing scheme. Comparison of the performance of the proposed approach is made with the corresponding results of conventional systems where pricing is not taken into consideration in CAC process. The performance results verify the considerable improvement achieved by the integration of pricing with CAC in wireless networks.
Keywords： wireless networks adaptive call admission control microeconomic theory pricing connection level QoS
A deployment strategy for wireless sensor networks using indoor radio propagation model
Huo Hongwei,Gao Shuai,Niu Yanchao,Zhang Sidong
Strategic Study of CAE 2008, Volume 10, Issue 9, Pages 64-69
Deployment strategy for Wireless Sensor Networks is an important issue. Most research works are based on the horizontal Scheme. However, many factors including the height of node's antenna, one of the vertical factors, can also affect the indoor communication performance of sensor nodes, which is a main consideration to design an appropriate deployment scheme. In this paper, the variance of coverage caused by the different antenna's height is analyzed, using log-distance indoor radio propagation model at 2.4GHz ISM band. The relationship between effective communication range and effective sensing range is also discussed. Based on traditional plane deployment strategies, a novel method is proposed to avoid the sensing collapsars. It first calculates the effective communication ranges, and eliminates the useless antenna's height parameter which can not affect the full coverage of sensing area and communication area. Then, it projects the residual height parameter to the plane and uses classical Deploy Rules to place the sensor nodes. Experiments and simulations indicate that this deployment strategy is useful and effective.
Keywords： wireless sensor network effective communication range effective sensing range sensing collapsar coverage
The Design on the Security Architecture of Public WLAN Based on Access Controller Mode
Song Yubo, Huai qun, Yang Xiaohui
Strategic Study of CAE 2008, Volume 10, Issue 8, Pages 56-59
The security problem, such as network security, user data protection, authentication, mobile management and network services are becoming more and more important in Public WLAN. This paper focuses on the design research of the PWLAN security architecture. A security model based on access controller is proposed in this paper. Furthermore, a compound 802.1x and WEB authentication scheme is provided to ensures cryptographically protected access while preserving pre-existing public WLAN payment models.
Keywords： public WLAN security architecture authentication access controller
Advanced Antennas Push Forward Wireless Connectivity
Kwai Man Luk, Baoyan Duan
Engineering 2022, Volume 11, Issue 4, Pages 1-2 doi: 10.1016/j.eng.2022.03.003
The Research and Implementation of WAPI Authentication on WLAN Access Point
Song Yubo,Yang Xiaohui,Hu Aiqun,Wang Zhili
Strategic Study of CAE 2005, Volume 7, Issue 9, Pages 65-69
With the wireless LAN technologies being widely applied, new WLAN security standards have been proposed to enhance the WLAN security. In this paper, through discussing the technology characteristic and the basic framework of the WAPI standard, the detail of the application of the WAPI authentication procedure on the WLAN access point was given. Furthermore, the performance of the authentication procedure was discussed.
Keywords： WLAN WAPI test analysis
Si-Ping Gao, Jun-Hui Ou, Xiuyin Zhang, Yongxin Guo
Engineering 2023, Volume 30, Issue 11, Pages 32-48 doi: 10.1016/j.eng.2023.05.019
While sufficient review articles exist on inductive short-range wireless power transfer (WPT), long-haul microwave WPT (MWPT) for solar power satellites, and ambient microwave wireless energy harvesting (MWEH) in urban areas, few studies focus on the fundamental modeling and related design automation of receiver systems. This article reviews the development of MWPT and MWEH receivers, with a focus on rectenna design automation. A novel rectifier model capable of accurately modeling the rectification process under both high and low input power is presented. The model reveals the theoretical boundary of radio frequency-to-direct current (dc) power conversion efficiency and, most importantly, enables an automated system design. The automated rectenna design flow is sequential, with the minimal engagement of iterative optimization. It covers the design automation of every module (i.e., rectifiers, matching circuits, antennae, and dc–dc converters). Scaling-up of the technique to large rectenna arrays is also possible, where the challenges in array partitioning and power combining are briefly discussed. In addition, several cutting-edge rectenna techniques for MWPT and MWEH are reviewed, including the dynamic range extension technique, the harmonics-based retro-directive technique, and the simultaneous wireless information and power transfer technique, which can be good complements to the presented automated design methodology.
Keywords： Microwave wireless power transfer Microwave wireless energy harvesting Unified Rectifier model Automated rectenna design Emerging rectenna techniques
Miniaturized Rotman lens with applications to wireless communication Research Articles
Bao-hua SUN, Qiu-yan LIANG, Gao-nan ZHOU
Frontiers of Information Technology & Electronic Engineering 2020, Volume 21, Issue 1, Pages 144-158 doi: 10.1631/FITEE.1900501
Keywords： Rotman lens Miniaturization Multibeam Beamformer Wireless communication
Editorial for the Special Issue on Microwave Wireless Power Transfer Technology
Baoyan Duan, Yi Huang
Engineering 2023, Volume 30, Issue 11, Pages 1-2 doi: 10.1016/j.eng.2023.09.009
Title Author Date Type Operation
Spatial fading channel emulation for over-the-air testing of millimeter-wave radios: concepts and experimental validations
Wei Fan, Lassi Hentilä, Pekka Kyösti,wfa@es.aau.dk
Journal Article
Polarizationmultiplexing based duplex radio-over-fiber link for millimeterwave signal transmission to a ring of multiple radio access units
Tayyab MEHMOOD, Hina QAYYUM, Salman GHAFOOR
Journal Article
From Terahertz Imaging to Terahertz Wireless Communications
Yi Huang,Yaochun Shen,Jiayou Wang
Journal Article
A comprehensive review of optical wireless power transfer technology
Syed Agha Hassnain MOHSAN, Haoze QIAN, Hussain AMJAD,Hassnainagha@zju.edu.cn
Journal Article
Recent Advances in Organ Specific Wireless Bioelectronic Devices: Perspective on Biotelemetry and Power Transfer Using Antenna Systems
Ahsan Noor Khan, Young-ok Cha, Henry Giddens, Yang Hao
Journal Article
Pricing Based Adaptive Call Admission Control Algorithm for Wireless Networks
Zhang Xue
Journal Article
A deployment strategy for wireless sensor networks using indoor radio propagation model
Huo Hongwei,Gao Shuai,Niu Yanchao,Zhang Sidong
Journal Article
The Design on the Security Architecture of Public WLAN Based on Access Controller Mode
Song Yubo, Huai qun, Yang Xiaohui
Journal Article
The Research and Implementation of WAPI Authentication on WLAN Access Point
Song Yubo,Yang Xiaohui,Hu Aiqun,Wang Zhili
Journal Article
Scavenging Microwave Wireless Power: A Unified Model, Rectenna Design Automation, and Cutting-Edge Techniques
Si-Ping Gao, Jun-Hui Ou, Xiuyin Zhang, Yongxin Guo
Journal Article
Miniaturized Rotman lens with applications to wireless communication
Bao-hua SUN, Qiu-yan LIANG, Gao-nan ZHOU
Journal Article
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