Multicell adaptive power allocation scheme based on game theory in OFDMA systems by ZHANG Tian-kui, ZENG Zhi-min, ZHANG Ying-ying

“…Transmit power levels of co-subchannels were coordinated among inter-cell, consequently inter-cell interference was mitigated and channel capacity was increased. Game theory was employed in the multicell power allocation. …”
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Covert Channel Construction Method Based on HTTP Composite Protocols by Longxing Jin, Zijun Liu, Fuquan Huang, Zizhao Lin, Ming Li

“…It can adjust the concealment and channel capacity according to the application scenario.…”
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Security versus reliability analysis for multi-eavesdropper cooperation wireless networks with best relay by Mei-ling LI, Zeng-shou DONG, Gang-fei WANG, Zhao-ming LU

“…Physical-layer security could be used to effectively combat eavesdroppers and the transmission reliability of the main link could be improved.A wireless relay network with multiple both decode and forward eavesdroppers and relays were considered,in the presence of the link from source to destination.A best relay selection scheme based on multieavesdropper’s cooperation was proposed,and the outage probability and the intercept probability was deduced under both schemes without relay and with best relay.Then,the security and reliability influenced by different relay selection schemes were analyzed.The simulation results show that the achievable channel capacity at the destination node and the system outage probability are directly affected by different relay selection scheme.Lower system outage probability can be achieved by the proposed scheme,and the system outage probability and intercept probability are both decreased with the increase of the number of relays.The intercept probability increases with the increase of the number of eavesdroppers,which,however,can be reduced by increasing the number of relays to ensure the main link’s reliable transmission.…”
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Convergence of communication and computing in future mobile communication systems by Yiqing ZHOU, Guojie LI

“…An overview and summary was provided on the convergence of communication and computing and the future research directions were clarified.As two key technologies of information science,communication and computing were born to be converged.In current mobile communication systems,from a single device or technique point of view,communication and computing had been well converged.However,to break the bottleneck of traditional mobile communication systems,it was necessary to converge communication and computing in a system level.Existing research demonstrates that a systematic convergence of communication and computing will reduce the channel capacity requirement on the mobile system and thus enhancing the system capability to support more services.Facing future mobile communication system,communication and computing convergence should be further studied in-depth from defining system service capabilities (basic theory),building a scalable,remodelable,transparent,modular system architecture and investigating service-aware cross-layer information exchange mechanisms,thus the sustainable development of mobile communication system could be promoted.…”
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Performance analysis of RIS-assisted mixed RF/THz system by Sai LI, Liang YANG, Qimei CUI, Siyuan YU

“…To solve the problem of the short transmission distance of terahertz (THz) links, the performance of the reconfigurable intelligent surface (RIS)-assisted mixed dual-hop radio frequency (RF)/THz system was studied.An RIS was used to enhance signal strength, thereby improving the system performance.Using the fixed-gain amplify-and-forward protocol, the cumulative distribution function and probability density function of the end-to-end signal-to-noise ratio of the RF/THz link were derived.Capitalizing on the statistical characteristics, the analytical expressions of outage probability, average bit error rate, and average channel capacity of the mixed relaying system were further derived.In addition, the asymptotic analyses of the outage probability and the average bit error rate were carried out to obtain the diversity order of the mixed RF/THz system.Simulation results show that the RIS can effectively improve the performance of the mixed RF/THz system.Furthermore, the system performance is related to the channel fading, pointing errors, and propagation distance.…”
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Research on optimization of indoor positioning batch ranging system based on DS-TWR algorithm by Hongwei SUN, Xuehong CAO, Liangbao JIAO, Lin MENG, Ziheng LIU, Feng YUAN

“…Aiming at the current problems of the ultra wide band (UWB) indoor positioning system based on the double sided two-way ranging (DS-TWR) algorithm, there are more communication times and a higher conflict rate in a multi-tag environment, an improved algorithm was proposed.The Hash algorithm to hash and distribute the communication content between the tag and the anchor was used, so that the anchor could reply to multiple tags in a regular and unified manner during each ranging process, which greatly reduced the number of times the anchor sends RES (responds) data.Experimental results show that the improved algorithms’ communication times between a tag and the anchor were reduced by 15% compared with the traditional DS-TWR algorithm, which increases the time proportion of the anchor receiving state in ranging, thereby reducing the anchor receiving RNG (range) data.The collision rate of packets, the success rate of ranging has increased by 43.6%.Due to the reduction in the number of communications required in each positioning cycle and the reduction in the collision rate between data packets, a smaller channel capacity would be required, thereby increasing the label capacity of the positioning system, which has strong engineering significance.…”
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Joint beam forming design for IRS-aided MIMO Internet of vehicles system by Lei ZHANG, Yu WANG, Jianjie TIAN, Lin ZHANG, Tianjiao ZHANG

“…A joint beamforming design method assisted by an IRS was proposed in MIMO Internet of vehicles system where the spectrum was shared by V2I and V2V users.Considering the constraints of V2V user’s data rate requirement, transmit power and IRS reflection phase shift, transmit precoding matrix at base station and reflective phase shift matrix of the IRS were jointly optimized to maximize channel capacity of the V2I user.The coupled non-convex optimization problem was decoupled and converted to be convex by using minimum mean square error, matrix analysis and inner approaching algorithm.An alternate iterative optimization algorithm was proposed to find the feasible solution.The performance comparisons of the proposed algorithm with several benchmarks were carried out and the impacts of the number of IRS reflective elements, IRS location and vehicle speed on spectrum efficiency were provided, respectively.The simulation results show that the proposed algorithm can converge quickly and the spectrum efficiency can be maximally improved by using the proposed method if the IRS is deployed near the base station.…”
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Characteristic Analysis on UAV-MIMO Channel Based on Normalized Correlation Matrix by Gao Xi jun, Chen Zi li, Hu Yong Jiang

“…This formula can be used directly to analyze the condition number of UAV-MIMO channel matrix, the channel capacity, and other characteristic parameters. …”
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Heralded interconversion between hyperentangled W state and hyperentangled KLM state assisted by nitrogen vacancy centers coupled with microresonators by Fang-Fang Du, Ming Ma, Qiu-lin Tan

“…Abstract As the hyperentanglement of photon systems holds lots of remarkable applications for enhancing channel capacity with less quantum resource, the interconversion of various hyperentangled states warrants in-depth investigation and becomes a vital work for quantum information technologies. …”
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Multi-ray channel modeling for programmable wireless environments in the terahertz band by Wenyu LUO, Hechao LIU

“…Terahertz communication system based on programmable wireless environment allowed programming customization of electromagnetic wave propagation in the most suitable ways for different wireless devices.It could not only improve serious fading,interference and non-line-of-sight problems,but also significantly enhance the security and privacy of the system.The channel modeling of terahertz wireless communication in programmable wireless environment was focused.Firstly,a multi-ray channel model for terahertz-band programmable wireless environment was established based on ray tracing technology as well as the propagation model of line-of-sight and non-line-of-sight.Then,based on the established propagation model,reflection coefficient,the broadband channel capacity under the water-filling power allocation algorithm and the RMS delayed extension were further studied.The simulation and analysis results show that the programmable wireless environment greatly reduces the influence of path loss and multipath fading in terahertz wireless transmission through active interference in electromagnetic wave transmission,improves the transmission capacity of terahertz communication system,which provides a reference for the later design of terahertz communication system,especially indoor terahertz communication system.…”
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A Simple Scheme for Belief Propagation Decoding of BCH and RS Codes in Multimedia Transmissions by Marco Baldi, Franco Chiaraluce

“…Among the several approaches proposed for this purpose, an important role is played by the iterative belief propagation principle, whose application to low-density parity-check (LDPC) codes permits to approach the channel capacity. In this paper, we elaborate a new technique for decoding classic binary and nonbinary codes through the belief propagation algorithm. …”
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Resource scheduling strategy based on simulated annealing algorithm in hybrid D2D cellular networks by Xiang YU, Haibo ZHANG, Lu YANG

“…D2D communication is a short distance communication mode in the future 5G network.In the process of communication,the information is transmitted from the sender to the receiver directly,without the need to transmit through the base station.The introduction of D2D communication in the traditional cellular network can greatly improve the total throughput of the system,increase the utilization of spectrum resources and reduce the power consumption of the transmitter.A resource allocation method which was used in hybrid D2D cellular network was mainly introduced,spectrum resources was distributed by Lagrange multiplier method combined with simulated annealing algorithm,a consideration of channel capacity and energy consumption of the resource scheduling strategy based on simulated annealing algorithm was put forward.This algorithm was simulated by the simulation platform in Vienna,compared to the traditional greedy optimization algorithm,it can significantly increase the total system throughput and bandwidth utilization and reduce the power consumption.In addition,the distributed algorithm was adopted,that D2D users searched for a suitable target channel and calculated their transmit power according to the algorithm steps,which reduced the signaling overhead of the base station.…”
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The Lomax Distribution for Wireless Channel Modeling: Theory and Applications by Ivan Sanchez, F. Javier Lopez-Martinez

“…Then, relevant performance indicators are derived, including the amount of fading, channel capacity, outage probability and error rate. Other applications include diversity reception using selection combining, as well as composite fading modeling. …”
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A Statistical Channel Model for Stochastic Antenna Inclination Angles by Gang Liu, Ming Zhang, Yaming Bo

“…Finally, a novel statistical channel model for stochastic antenna inclination angles is proposed, and the ergodic channel capacity is analyzed.…”
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Robust beamforming algorithm for RIS-MIMO system based on train prior information by ZHANG Zepeng, LI Cuiran, WU Hao, XIE Jianli, XU Qiong

“…Secondly, the outage performance of the millimeter-wave MIMO system was studied, and an expression of outage probability based on channel capacity was given. Finally, the optimization problem was modelled as a minimum outage probability problem constrained by base station transmit power. …”
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Multi-pulse Fourier codes for bit transmission at the quantum limit by Matteo Rosati

“…Bit-transmission can be enhanced by the use of quantum detection techniques, realizing a joint-detection receiver (JDR) that is able to decode transmitted signals via a collective operation and achieve the Holevo channel capacity. Explicit JDR designs proposed so far employ the Hadamard or Fourier transform to perform a phase-to-intensity translation of the information encoding, effectively falling in the class of on-off-keying (OOK) modulation techniques; they improve over classical decoders but fall short of the Holevo capacity, particularly at large signal mean photon number $n\gtrsim1$ . …”
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Research on heterogeneous radio access and resource allocation algorithm in vehicular fog computing by Kai XIONG, Supeng LENG, Ke ZHANG, Hao LIU

“…With the development of intelligent transportation and the constant emergence of new vehicular on-board applications,such as automatic driving,intelligent vehicular interaction and safety driving.It is difficult for an independent vehicle to run a wide variety of applications with a large number of computing needs and time delay needs relying on its own limited computing resources.By distributing computing tasks in devices on the edge of the network,fog computing applies virtualization technology,distributed computing technology and parallel computing technology to enable users to dynamically obtain computing power,storage space and other services on demand.Applying fog computing architecture to Internet of vehicles can effectively alleviate the contradiction between the large computing-low delay demands and limited vehicular resources.By analyzing the channel capacity of vehicle-to-vehicle communication,vehicle-infrastructure communication and vehicle-time-delay tolerant network communication,an optimization model of heterogeneous access to multi-service resources for the Internet of vehicles was established,and various vehicle-to-fog resources were jointly dispatched to realize efficient processing of intelligent transportation applications.The simulation results show that the proposed reinforcement learning algorithm can effectively deal with the resource allocation in the heterogeneous vehicular fog architecture.…”
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Switching MIMO System with Adaptive OFDM Modulation for Indoor Visible Light Communication by Xinyue Guo, Keer Zhang, Xufa Huang

“…The adaptive OFDM modulation, which is realized by power and bit allocation on OFDM subchannels, is utilized to achieve the maximum channel capacity under a given target bit error rate (BER). …”
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Self-Interference Cancellation-Based Mutual-Coupling Model for Full-Duplex Single-Channel MIMO Systems by Pawinee Meerasri, Peerapong Uthansakul, Monthippa Uthansakul

“…The results indicate that the channel capacity performance of the proposed technique can significantly be improved due to the reduction of the self-interference power. …”
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Research on Orbital Angular Momentum Mode Detection in an Atmospheric Environment with Fusion Transfer Learning by Chenghu Ke, Youmei Chen, Xizheng Ke

“…Due to the large amount of data required for training each OAM mode, the increase in channel capacity leads to an exponential growth in the required data volume. …”
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