D2D data collaboration forwarding mechanism based on contract theory by Jin ZHOU, Luyang ZHANG, Peng YANG

“…A contract theory-based D2D data forwarding mechanism was proposed for device-to-device (D2D) communications under cellular networks.Firstly,considering the selfishness of users,a model of principal-agent was constructed,which regarded the transmitter user as principal and the idle user as agent.Then,the utility function of the contract was used to construct the optimization problem with the constraint condition.Meanwhile,the utility function of the two sides was converted into the satisfaction degree of the two sides of the contract.Finally,the stable matching with the minimum weight was constructed to obtain the optimal contract solution.The simulation results show that the proposed mechanism can better encourage the idle user to participate in collaborative communication so as to enhance the user’s degree of satisfaction and throughput.…”
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On the Statistical Properties of Nakagami-Hoyt Vehicle-to-Vehicle Fading Channel under Nonisotropic Scattering by Muhammad Imran Akram, Asrar U. H. Sheikh

“…The spatial time correlation function (STCF), the power spectral density (PSD), squared time autocorrelation function (SQCF), level crossing rate (LCR), and the average duration of Fade (ADF) of the Nakagami-Hoyt channel have been derived under the assumption that both the transmitter and receiver are nonstationary having nonomnidirectional antennas. …”
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Design of full-connected hybrid precoding based on an equivalent channel in millimeter-wave massive MIMO system by Haiyan CAO, Zhiyao MA, Yingjuan ZHI, Renqing LIU, Fangmin XU, Xin FANG

“…In order to improve the performance of hybrid precoding scheme based on fully connected structure in millimeter-wave massive MIMO system, a hybrid precoding scheme based on an equivalent channel with two-step design method was proposed.Firstly, the equivalent channel was constructed by combining the analog precoding matrix at the transmitter, the analog combining matrix and the channel matrix at the receiver, and the analog part of the transceiver was designed to maximize the equivalent channel gain.Furthermore, the least squares criterion was applied to derive the digital precoding matrix and the digital combination matrix column by column to design the digital part of the transceiver.Simulation results show that the proposed algorithm can approximate the optimal digital precoding scheme and has lower complexity and stronger fault tolerance.…”
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Joint linear transceiver design over MIMO frequency selective channels by HAN Sheng-qian, YANG Chen-yang

“…To avoid the iterative computation between the transmitter and receiver involved in the joint MMSE Tx-Rx design, a low-complexity transceiver given a MMSE receiver called successive searching zero-forcing （ZF-SS） algorithm was proposed, which exploits spatial resources to mitigate or eliminate the inter-symbol-interference caused by multi-path channels. …”
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Platform for Training and Growth of Scientific and Pedagogical Personnel Management by D. M. Mustafina

“…The main source and transmitter of knowledge, new scientific ideas and concepts is creative team. …”
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Augmented MIMO: Body-Mounted Antennas for Tiny Wearable Devices by Akihito Noda

“…Multiple-input–multiple-output (MIMO), which uses multiple antennas at the transmitter and receiver, is now an essential technique for increasing communication capacity without widening the occupied radio bandwidth. …”
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Age of information-oriented sampling and power control in vehicular status update networks by Jianhua ZENG, Chongtao GUO, Cheng GUO

“…In a vehicular status update network based on broadcast communication, a D/Geo/1/1 queuing mechanism with minimum timestamp priority was adopted to transmit data packets.The queuing theory was used to analyze the age-ofinformation (AoI) outage probability of the receivers and the average transmit power of the transmitter.Based on the monotonicity of the AoI outage probability with respect to packet sampling rate and transmit power, an iterative algorithm for jointly optimizing sampling rate and transmit power was proposed to minimize the maximum AoI outage probability of all receivers under power constraint, which fairly improved information freshness of all receivers under sampling and power control.Simulation results verify the accuracy of theoretical analysis and the efficiency of the algorithm.…”
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Res-DNN based signal detection algorithm for end-to-end MIMO systems by Guoquan LI, Yonghai XU, Jinzhao LIN, Zhengwen HUANG

“…Deep learning can improve the effect of signal detection by extracting the inherent characteristics of wireless communication data.To solve the tradeoff between the performance and complexity of MIMO system signal detection, an end-to-end MIMO system signal detection scheme based on deep learning was proposed.The encoder and the decoder based on residual deep neural network replace the transmitter and the receiver of the wireless communication system respectively, and they were trained in an end-to-end manner as a whole.Firstly, the features of the input data were extracted by encoder, then the communication model was established and was sent to the zero forcing detector for preliminary detection.Finally, the detection signal was reconstructed through the decoder.Simulation results show that the proposed detection scheme is superior to the same type of algorithm, and the detection performance is significantly better than that of the MMSE detection algorithm at the expense of a certain time complexity.…”
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Impact of Vehicular Array Position on Urban MIMO Channel Characteristics by Christopher C. Squires, Tricia J. Willink

“…Analysis of the data shows that the array's position on the vehicle, along with the location and orientation of the vehicle with respect to the transmitter, can have a considerable impact on the channel characteristics observed. …”
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Semantic communication system with efficient integration of global and local context features by Peng LUO, Yueling LIU, Yuyuan ZHANG, Kuo CAO, Haitao ZHAO, Jibo WEI

“…A communication system based on extended contextual semantic features was proposed by using an end-to-end integrated design method based on deep learning.Unlike existing research that focused only on local context while neglecting global context, the proposed system integrated both local and global contextual knowledge, semantic encoding and decoding was utilized by extended contextual knowledge, thereby enhancing the reliability of the semantic communication system.At the transmitter, efficient semantic representation was achieved through extended contextual semantic encoding.At the receiver, the accuracy of semantic inference was improved by combining mechanisms such as historical communication text mining, contextual semantic feature learning, and heuristic graph-based decoding strategy.When comparing with the traditional communication system and the existing semantic communication systems, simulation results demonstrate that the proposed system significantly improves the reliability of the communication system under low signal-to-noise ratio.…”
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Physical layer security performance of SWIPT system in the presence of randomly located eavesdroppers by Hui QIAN, Guangqiu LI, Yifan DING

“…The locations of the eavesdroppers have serious impact on the physical layer security performance of simultaneous wireless information and power transfer (SWIPT) systems with transmit antenna selection (TAS) and power split (PS) strategy,which can be considered to be modeled as Poisson point process (PPP).The closed-form expressions for secrecy outage probability (SOP) of SWIPT system with TAS and PS strategy under non-colluding and colluding eavesdropping scenarios were derived by using probability generation function of PPP,respectively.Numerical and simulation results show that,the larger the number of transmit antennas,the smaller the distance between the transmitter and the information receiver,and the smaller the PS factor,the smaller SOP of SWIPT system under non-colluding and colluding eavesdropping scenarios.Colluding eavesdropping will further deteriorate the physical layer security performance of SWIPT systems.…”
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Performance enhancement scheme for IRS-assisted cognitive backscatter communication network by Bin LYU, Yi CAO, Jian LI, Ting QI

“…In order to achieve the self-sustainable cognitive radio network （CRN） and improve its communication efficiency， an efficient multi-mode switching scheme assisted by the intelligent reflecting surface （IRS） for the overlay scenario was proposed.In particular， the secondary transmitter （ST） could work in either backscatter communication （BackCom） mode or harvest-then-transmit （HTT） mode.The IRS was exploited to enhance the energy harvesting， information backscattering， and information transmission efficiencies at the ST.To maximize the system sum-rate， an optimization problem about the phase shirts at the IRS， time scheduling， and power allocation was formulated.Since the formulated problem was non-convex， an efficient block coordinate descent （BCD） based algorithm was proposed to achieve the sub-optimal solution.Simulation results confirm that the proposed scheme can achieve up to 200% sum-rate gain over the benchmark schemes.…”
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Confidential communications technique based on message block precoder in multi-user MIMO systems by Yao ZHU, Yi-jun ZHU, Shui-lian ZHANG, Yong-gang LIU

“…For confidential communications in a multi-user MIMO wiretap channel,though no information regarding the illegitimate receiver was presumed at the transmitter,an artificial interference and a precoding technique based on message block were proposed.Except for confidentiality,the effectivity and efficiency of confidential communications were also taken into consideration.The artificial interference selectively degraded the passive illegitimate receiver’ signal while did not effect every legitimate receiver.The precoding technique combined the existed zero-forcing method that used to eliminate the multi-user interference with singular value decomposition (SVD)-based linear precoder so that enhances the efficiency of confidential communications.ulation result shows that this precoding method degrades the illegitimate receiver’ signal to interference plus noise ratio (SINR) even more and enhances the capacity of multi-user MIMO system compared with the precoding method based on single message symbol.…”
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MIMO Antenna Array Design with Polynomial Factorization by Wen-Qin Wang, Huaizong Shao, Jingye Cai

“…For a desired virtual antenna array, the polynomial factorization method can optimally design the specified MIMO transmitter and receiver. The array performance is examined by analyzing the degrees-of-freedom and statistical output signal-to-interference-plus-noise ratio (SINR) performance. …”
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Effect of Environmental Parameters on the Performance of Optical Wireless Communications by Hosam Abd Elrazek Mohamed Ali, El-Sayed Soliman A. Said, Mohamed Ebrahim Yousef

“…For different weather conditions the max distance between transmitter and receiver can also be estimated. The system analysis depicted the better performance of the Multi-Input/Multi-Output (MIMO) configurations compared to Single Input/Single Output (SISO) at different weather conditions.…”
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Cross-Slot Antenna with U-Shaped Tuning Stub for Ultra-Wideband Applications by Dawood Seyed Javan, Mohammad Ali Salari, Omid Hashemi Ghoochani

“…This antenna operates as a transmitter and receiver antenna. Effects of the antenna dimensional parameters are studied through experimental and simulation results. …”
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A survey of resource allocation in non-orthogonalmultiple access systems by Zhengqiang WANG, Qu CHENG, Zifu FAN, Xiaoyu WAN

“…Non-orthogonalmultiple access(NOMA)is an important candidate technology of the fifth generation(5G)wireless network,which canmeet the low latency,low power consumption,high reliability,high throughput,wide coverage requirements of the next generationmobile communication systems.NOMA utilizes superposition coding at the transmitter and successive interference cancellation at the receiveRto allow several users’datamultiplexing in the same resource block.It improves the spectrum efficiency compared with the traditional orthogonalmultiple access.The research status of resource allocation of NOMA systems was summarized including single-carrier NOMA resource allocation,multi-carrier NOMA resource allocation,cooperative NOMA relay resource allocation,and cooperative NOMA resource allocation under hardware impairment conditions.Finally,themain problems in the current study were summarized and the research challenges and some future research directions of NOMA resource allocation technology were discussed.…”
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Capacity of fully correlated MIMO system using character expansion of groups by Ejaz Khan, Conor Heneghan

“…In our calculations, it is assumed that the receiver has perfect channel state information (CSI) but no such information is available at the transmitter.…”
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Power Link Optimization for a Neurostimulator in Nasal Cavity by Seunghyun Lee, Jonghoek Kim, Sanghoek Kim

“…For a given small receiver in a multilayer tissue model, the transmitter is abstracted as a sheet of tangential current density for which the optimal distribution is analytically found. …”
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Asynchronous perception algorithm based on energy detection by Pan YU, Bin LI, Cheng-lin ZHAO

“…In the future heterogeneous wireless networks,since primary user (PU) and cognitive secondary user (SU) are not coordinated to be synchronous,it will result in sense timing difference between PU’s transmitter and SU’s receiver.For this asynchronous sense case,a new asynchronous sensing algorithm based on Bayesian estimation theory was proposed.A unified dynamic state space model was first proposed to describe the observable energy relationship with dynamic PU state and unknown timing difference.Then,an iterative estimation scheme was designed using stochastic finite set and the rules of maximum posterior probability.Finally,approximated estimation results were obtained by using a particle filter.The simulation results show that the proposed asynchronous scheme significantly eliminates the uncertainty of the received signal information and thus improves the spectrum sensing performance by obtaining the time difference accurately.…”
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