Performance analysis of mixed FSO-RF transmission in UAV relay communication systems by Su XU, Ji ZHANG, Yanghua DIAO, Yuanying LIU, Yi ZHANG

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Performance analysis of amplify-and-forward cooperative communication systems with imperfect channel estimation by WANG Lei, CAI Yue-ming, YANG Wei-wei, TU Jia

“…The impact of channel estimation errors on the performance for two-hop multi-relays assisted am-plify-and-forward（AF） cooperative communication systems was investigated.Closed-form expressions of the average symbol error rate,as well as the diversity gain under different channel estimation quality orders for both opportunistic re-laying（OPR） and all-participate relaying（APR） schemes were derived.Average signal-to-noise-ratio（SNR） gap ratio is investigated for the two types of cooperative communication systems,which lead to a conclusion that the OPR scheme is more susceptible to channel estimation errors than the APR scheme.Numerical results verify the theoretical analysis.…”
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An Experimental Realization of a Chaos-Based Secure Communication Using Arduino Microcontrollers by Mauricio Zapateiro De la Hoz, Leonardo Acho, Yolanda Vidal

“…Security and secrecy are some of the important concerns in the communications world. In the last years, several encryption techniques have been proposed in order to improve the secrecy of the information transmitted. …”
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Trajectory and communication scheduling optimization for the rechargeable UAV aided data collection system by Qianwen LI, Jianfeng CHEN, Miao CUI, Guangchi ZHANG

“…A rechargeable unmanned aerial vehicle (UAV) aided wireless sensor network was considered, which consists of multiple ground terminals with a large amount of time-sensitive data to be collected.Due to the limited battery capacity, the UAV cannot collect the data from all terminals through a single flight mission, and it needs to return to the charging pile to replenish its flight energy several times during the whole mission.The optimization of the terminal scheduling, trajectory, flight speed and transmission rate for the UAV was studied to maximize the number of terminals whose data had been collected within the data lifetime limit.Due to the variable coupling and the existence of discrete binary scheduling variables, the considered optimization problem is difficult to solve.To tackle such a difficulty, an efficient algorithm was proposed based on the stochastic optimization and the feature engineering.Specifically, the flight hover communication protocol was introduced to simplify the UAV flight process.And then a terminal scheduling algorithm was innovatively proposed with the influence factor and the stochastic preference, which extracted the features that affect the service time of the UAV, optimized the weights of the features, and further simplified the optimization problem into multiple subproblems.The subproblems were then solved by using the block coordinate descent and successive convex approximation techniques.Simulation results show that the proposed optimization algorithm achieves significant performance gains over several benchmark schemes in the scenarios with different data lifetime requirements and different numbers of ground terminals.…”
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Improved LDPC-based short-range frequency-hopping wireless communication system by Wei-dong FANG, Wu-xiong ZHANG, Ming-ming HU, Wei CHEN, Yang YANG

Subjects: “…short-range wireless communication…”
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Manuel Сastells’ concept of the power of communication in the scientific discourse of digital sociology by M. V. Kibakin, M. M. Kryukova

“…Castells in digital sociology, substantiates socio-project ways of increasing the positive potential of Internet communications in the context of digital society development.…”
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Securing Brain-to-Brain Communication Channels Using Adversarial Training on SSVEP EEG by Hossein Ahmadi, Ali Kuhestani, Mohammadreza Keshavarzi, Luca Mesin

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Channel Shortening-Based Single-Carrier Underwater Acoustic Communications in Impulsive Environment by Xingbin Tu, Zicheng Li, Yan Wei, Fengzhong Qu

Subjects: “…underwater acoustic communication…”
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Prevalence of Non-Communicable Diseases Among Elderly in India: A Scoping Review by Patlolla Sriram Yadav, Ajitha Katta, Gooty Shirisha, Mousami Kirtania

Subjects: “…Non-communicable diseases…”
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Interdisciplinary and Meta-Disciplinary Integration as a Means of Developing Students’ Communicative Competence by Y. L. Semenova, G. D. Bukharova

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When multiple cooperative communication: virtual real-time service theory and application by Wei Chen

Subjects: “…wireless communication…”
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IMPROVING THE PERFORMANCE OF HOTELS ON THE BASIS OF THE USE OF THE FEATURES OF BUSINESS COMMUNICATIONS IN HOTEL COMPLEX by A. Kabanov

“…In the article reviewed and analyzed the role of verbal and nonverbal communication between guests and its employees, studied various psychological types of hotel guests and recommendations for maintenance every psycho.…”
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Intelligent correlation method of typical business data in power communication operation management by Guilong WU, Zhimin YANG, Yu HUANG

Subjects: “…power communication operation management…”
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Study on Air Interface for Macbine-Type Communication over LTE-Advanced Network by Minghao Wu, Ziwei Zheng

Subjects: “…machine-type communication…”
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Identité, image(s) et stratégie de communication : les spots électoraux télévisés

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Communication strategies in the online teaching learning process during pandemic Covid-19 by Isnawijayani Isnawijayani, Rahma Santhi Zinaida, Genoveva Refina Virgi Handianita, Tri Widayatsih, Siti Rahayu, Dwi Muhammad Taqwa

“…Communication in education sector carried out by teachers and student, The main requirements are creation and communication of an effective learning and communicators in delivering learning material. …”
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Projects for the Prevention and Control of Cronic non-communicable Diseases: Experiences in the Cienfuegos Province by Aliuska Tamayo Verdecia, Miriela Roque Gutiérrez, Mirian Herrera Barrueta

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INSTITUTIONAL MARKETING COMMUNICATIONS IN ROLE OF ATTRACTING FOREIGN DIRECT INVESTMENTS TO BOSNIA AND HERZEGOVINA by Mustafa Sinanagić, Beriz Čivić, Alma Kamarić

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Research on Satellite Communication System’s Design and Verifi cation Based on SysML by Can LIAO, Tian ZHAO, Xu FENG, Shuangai XIAO

Subjects: “…satellite communication system…”
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Bit-filling algorithm for fast subcarrier-selecting in ultrasonic through-metal communication by Linsen XU, Wei YANG, Hongxian TIAN, Tao WU

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