Energy Efficiency Maximization with Optimal Beamforming in Secure MISO CRNs with SWIPT by Liang Xue, Yao Ma, Miao Zhang, Wanqiang Qin, Jin-Long Wang, Yazhou Wu

“…In this paper, the optimal beamforming problem of multi-input single-output (MISO) cognitive radio (CR) downlink networks with simultaneous wireless information and power transfer is studied. …”
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Achieving Network Localizability in Nonlocalizable WSN with Moving Passive Event by Xiaolei Zhou, Deke Guo, Tao Chen, Xueshan Luo

“…Localization is an essential service in most of the wireless sensor network (WSN) applications. This paper focuses on utilizing the moving passive event to achieve the network localizability in an initially nonlocalizable network. …”
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Definition of a thermal comfort rating scale for mountaneering boots by Eleonora Bianca, Francesca Dotti, Ada Ferri

“…Temperature and humidity were determined with six wireless probes placed on the most exposed parts of the foot (hallux, middle toe, little toe, dorsum, ankle and sole). …”
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State-of-the-art and trend of emergency rescue communication technologies for coal mine by Qingsong HU, Wei YANG, Enjie DING, Shiyin LI, Binghao LI

“…For the disaster area probing and emergency rescue in a mine,it is of great importance to employ the emergency communication system to communicate with each other,determine the places of trapped miners,and sense current status of disaster area.The hybrid emergency communication architecture model for coal mines was extracted,which was composed of one backbone,multiple branches,several special lines,and some wireless networks as assistance.Four types of emergency communication systems of coal mine were reviewed,namely through-the-air,through-the-wire,through-the-earth and mixed medium type.The key technologies and challenges of these four emergency communication types were analyzed.The research trend was discussed and a new emergency communication mode based on the reconstruction of mine Internet of things was proposed.The main enabling technologies of this new emergency communication mode were analyzed,namely post-disaster reconstruction of mine Internet of things,shifting nodes re-localization after mine disaster,status sensing method of mine disaster area,and data transmission method for post-disaster reconstruction network.…”
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Performance analysis of orthogonal signals with TASP/MRC diversity by Guangqiu LI, Siting WANG

“…In order to solve the design problem of predictive transmit antenna selection (TASP) / receive antenna maximum ratio combining (MRC) wireless communication system with the minimum mean square error (MMSE) channel prediction,exact and approximate closed-forms for the average symbol error rate (ASER) of M-ary ortho-gonal and biorthogonal signals with coherent detection and TASP/MRC over Rayleigh block fading channel were de-rived by using parabolic cylinder function,the approximate expression of Gaussian Q-function and moment generat-ing function (MGF) based analysis approach respectively.Numerical and simulation results show that the theoretical analysis of the ASERs of orthogonal and biorthogonal signals is exact and the approximate closed-form for the ASER of orthogonal signals is accurate.The above exact or/and approximate closed-forms of ASER of orthogonal and biortho-gonal signals with coherent detection and TASP/MRC can be used to determine the number of antennas of transmitter and receiver and the parameters of predictor quickly,instead of the time-consuming and inefficient computer simulation.…”
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A novel LTE indoor location system based on multiple antenna clusters by Yajuan LV, Shan LIU, Rongyi HU, Wenhao ZHANG

“…To solve the problem, a new LTE wireless location system based on multiple antenna clusters was proposed. …”
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Robust resource allocation algorithm for multicarrier NOMA security communication system by Yu ZHANG, Xiongwen ZHAO, Xiaoqing WANG, Suiyan GENG, Peng QIN, Zhenyu ZHOU

“…To improve the spectrum efficiency and enhance the information security of wireless network, a sum secrecy rate maximization-based robust resource allocation algorithm was proposed for a downlink multicarrier NOMA security communication system.Firstly, the artificial noise (AN) precoding vector was designed to be orthogonal to the legitimate channel, so that the legitimate transmission would not be affected by the AN.Then, considering the constraints of rate requirement of each user and the maximum transmit power of base station, a joint AN precoding, downlink data precoding and subcarrier allocation optimization problem was formulated under eavesdropping channel uncertainties.To solve that non-convex problem, it was decomposed into two joint optimization subproblems: precoding optimization and subcarrier allocation.The former was solved based on S-procedure and block coordinate descent (BCD) algorithm, the latter was solved by dynamic matching theory.Simulation results demonstrate that the proposed algorithm has good robustness and can effectively improve the sum secrecy rate.…”
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A Novel 3D Indoor Localization Scheme Using Virtual Access Point by Taekook Kim, Eui-Jik Kim

“…These methods, however, have drawbacks, such as the need for an additional communication module and database. Wireless local area network (WLAN) access point (AP) is widely installed at various locations, and using these WLAN APs can be a viable alternative. …”
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Two-layer distributed cache in D2D integrated fog-RAN by Chengyu XIA, Yanxiang JIANG

“…With the development of mobile communications,people’s demands for low-latency transmission networks are rapidly increasing.Fog-RAN,as a new architecture suitable for 5G/B5G communication networks,has broad application prospects.Considering the fog network of device-to-device communication,a two-layer distributed cache based on device-to-device communication and fog-RAN was proposed to reduce the delay for users to download files.Firstly,a closed-form solution of the download delay of the two-layer cache and a closed-form solution of the delay gain were obtained.On this basis,a distributed algorithm was designed to obtain the best cache strategy,so that each fog-based wireless access point (F-AP) or user equipment (UE) only needed to use the information of the neighboring devices to complete the caching.The simulation results show that the two-layer distributed cache can effectively reduce the download delay.…”
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Research and application of V2X based on MEC by Jiahui QIU, Zhichao ZHOU, Xiaobo LIN, Yu XIAO, Chao CAI, Liu LIU

“…The large-scale construction of 5G wireless communication network enhances the development of C-V2X (cellular-vehicle to everything) towards diversified directions.Large bandwidth services,such as high-definition video and AR/VR,bring great transmission and processing pressure to the classical network architecture.Meanwhile,traffic safety services characterized by ultra-high reliability and low delay put stringent requirements on network performance.The network architecture of providing services and computing localization through setting user panel down to close to the terminals and MEC (multiple access edge computing) can meet the requirements of data short loop transmission and ultra-low delay in the internet of vehicles scenario.The combination of MEC and V2X was explored in depth,the MEC networking scenario,MEC network architecture and the key technologies and challenges of MEC were analyzed.The combination scheme of MEC and C-V2X integration of network planning was provided.The application of MEC in C-V2X was presented in several specific scenarios.…”
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Multi-feature fusion classification method for communication specific emitter identification by Zunwen HE, Shuai HOU, Wancheng ZHANG, Yan ZHANG

“…A multi-feature fusion classification method based on multi-channel transform projection, integrated deep learning and generative adversarial network (GAN) was proposed for communication specific emitter identification.First, three-dimensional feature images were obtained by performing various transformations, the time and frequency domain projection of the signal was constructed to construct the feature datasets.GAN was used to expand the datasets.Then, a two-stage recognition and classification method based on multi-feature fusion was designed.Deep neural networks were used to learn the three feature datasets, and the initial classification results were obtained.Finally, through fusion and re-learning of the initial classification result, the final classification result was obtained.Based on the measurement and analysis of the actual signals, the experimental results show that the method has higher accuracy than the single feature extraction method.The multipath fading channel has been used to simulate the outdoor propagation environment, and the method has certain generalization performance to adapt to the complex wireless channel environments.…”
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Terahertz wave propagation and channel characterization by Haofan YI, Ke GUAN, Danping HE, Bo AI, Zhengrong LAI, Zhangdui ZHONG

“…Firstly, the different characteristics of terahertz waves compared to lower frequency bands were summarized, including the influence of meteorological factors and rough surfaces of materials on THz waves.Next, it was proposed to use ray-tracing (RT) technology to calibrate the three-dimensional (3D) environment model and electromagnetic parameters of materials in the target scenarios through very limited channel measurement data.Then, the reversed parameters were utilized to perform in a similar but more general scenario, instead of a large amount of channel measurement data.Finally, the channel characteristics were analyzed by extraction of the channel key parameters, such as path loss, shadow fading, Rician K-factor, delay spread, angular spread, and doppler parameters in a mobile scenario.Representing two ends of 6G THz use cases from indoor scenario to outdoor scenario, case studies were made for wireless connections on a desktop and vehicular communications, respectively.As for the outdoor scenario, the influences of meteorological factors were additionally considered.The work is of great significance for the design and evaluation of the THz communication system.…”
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River Water Quality Monitoring Through IoT Enabled Technologies by Rita de Fátima Muniz, Badria Almaz Ali Yousif, Azadeh Shemshad

“…In this paper named Internet of Things (IoT) based river water quality monitoring gives the outcome of Quality River of water by the advantage of various advanced techniques (IoT), Wireless Sensor Network (WSN). As part of this we have made the things to collect the data and transfer the data to the software that we have made. …”
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Performance Evaluation of MBA-OLSR Routing Protocol for MANETs by Waheb A. Jabbar, Mahamod Ismail, Rosdiadee Nordin

“…The protocol performance is evaluated in different simulation scenarios of wireless mobile ad hoc networks (MANETs) environment. …”
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La diffusion de l’Internet en Côte d’Ivoire. Obstacles et implications by Alain François Loukou

“…Moreover, although rising generation mobile phones and other digital terminals enable to have access to the Internet, we notice that these wireless technologies are currently not commonplace. …”
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Virtural Realtime Services：Infrastructure，Algorithms and Evolution Path by Wei Chen

“…A virtual rea1-time service infrastructure for future wireless access，which is capable of efficiently using the idle timeslots or renewable energy distributed in the“negative time-axis”before users’ transmission requests was proposed. …”
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Delay-optimal spectrum decision method for cognitive network by Wu-jian SUN, Na LI, Yang LIU, Le SUN, Tao CHEN, Hao LI, Ou LI

“…Spectrum decision was investigated within the confine of spectrum management framework for cognitive radio networks.Sensing errors in PHY layer,outage probability on wireless channel and multiple interruptions of primary user were taken into consideration.Probability-based and sensing-based spectrum decision methods were proposed,which were capable of balancing traffic evenly among licensed.For the probability-based method,short-time first discipline was employed to further shorten average residual time,closed-formed expression were presented based on dynamical programing.For the sensing based method,new channel could be chosen for uncompleted transmission,which alleviated the time spent in waiting primary user.Optimal residual time was obtained by choosing the minimal value of the two methods.Furthermore,spectrum heterogeneity was taken into consideration and theoretical analysis was of general sense.Simulation results validate the approach is efficient.…”
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Optimal detection of random phase signal with Doppler frequency offset in Chirp-BOK multi-antenna system by Hongbing QIU, Xinyu QIAO, Lin ZHENG, Chao YANG, Weiwei YAO, Jing ZHANG

“…When there are Doppler frequency deviation and phase noise in channel,the MIMO-OFDM system with coherent detection requires complicated and accurate frequency offset estimation and Doppler compensation.Based on this,an optimal random phase detection was proposed in multi-antenna Chirp-BOK system,which improved the system capacity by space division multiplexing in the condition of anti-interference and anti-frequency deviation.The equivalent MIMO channel coefficient matrix of multi-antenna Chirp-BOK system was derived as a real matrix,so as to reduce the complexity of channel estimation and avoid to be affected by random phase.A two plus two wireless transceiver system was built on the NI USRP-2942R platform.Simulation and experiment results show that the MIMO-Chirp-BOK system inherits the advantages of low complexity,insensitivity to phase shift and frequency offset of Chirp-BOK communication system.It achieves multiplied communication capacity by increasing the number of antennas.…”
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Design and Optimization of LTE 1800 MIMO Antenna by Huey Shin Wong, Mohammad Tariqul Islam, Salehin Kibria

“…A multiple input and multiple output (MIMO) antenna that comprises a printed microstrip antenna and a printed double-L sleeve monopole antenna for LTE 1800 wireless application is presented. The printed double-L sleeve monopole antenna is fed by a 50 ohm coplanar waveguide (CPW). …”
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Compact Multiband Slot Antenna for WLAN/WiMAX Operations by Jianhui Bao, Qiulin Huang, Xinhuai Wang, Xiaowei Shi

“…These modes cover the standards of 3.5 GHz WiMAX and 2.4/5.8 GHz WLAN, three useful frequency bands for present wireless communication systems. The proposed antenna fed by L-shaped microstrip line has a small overall dimension of 16×30 mm2. …”
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