Robust beamforming for multicell downlink TDD massive MIMO system based on QoS by Jie CAO, Yong LIAO, Xuan-fan SHEN

“…In view of multicell downlink time division multiplexing (TDD) massive multiple-input multiple-output (MIMO) systems which had imperfect channel state information (CSI),the beamforming problem that minimized the total transmit power and signal leakage power based on quality of service (QoS) was studied.First,the objective problem was approximated as a standard convex optimization problem.Then,by using the duality of uplink and downlink,an inner and outer layer iterative algorithm was proposed.Numerical results show that,comparing with other typical downlink multicell massive MIMO beamforming algorithms,the proposed algorithm has obvious advantages in terms of complexity and energy efficiency.…”
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Combined Synchronization among Three Inconsistent Networks by Yuan Chai, Xiaojing Zhu, Jingjing Cai

“…A realistic combination model of multiple inhomogeneous networks and a universal controller are devised in the combination design. …”
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Energy efficiency joint optimization algorithm for low-precision ADC massive MIMO systems by Haiyan CAO, Wenjuan HU, Yingjuan ZHI, Fangmin XU, Xin FANG

“…An uplink energy efficiency optimization algorithm based on alternating optimization algorithm was proposed for large-scale multiple-input multiple-output (MIMO) systems with low-precision analog to digital converters (ADC).That is,based on the maximum ratio combining (MRC) reception,an optimization model aiming at maximizing energy efficiency was established,and then the original fractional form optimization problem was converted into an equivalent subtractive form according to the nature of the fractional programming.In the case where the number of quantization bits was constant,the iterative optimization of the transmission power and the pilot length were performed.Simulation results show that the proposed algorithm has better spectral efficiency and energy efficiency.…”
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Observation of Gaussian Pseudorapidity Distributions for Produced Particles in Proton-Nucleus Collisions at Tevatron Energies by Abdurakhmanov Ulugbek, Gulamov Kadyr, Lugovoi Vladimir, Navotny Vadim

“…Events belong to very central collisions of protons with heavy emulsion nuclei with probability of realization of less than 1% and with multiplicity of shower particles exceeding (2-3 times) the average multiplicity in proton-nucleus collisions in emulsion. …”
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MIMO Antenna Array Design with Polynomial Factorization by Wen-Qin Wang, Huaizong Shao, Jingye Cai

“…One of the main advantages of multiple-input multiple-output (MIMO) antenna is that the degrees-of-freedom can be significantly increased by the concept of virtual antenna array, and thus the MIMO antenna array should be carefully designed to fully utilize the virtual antenna array. …”
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Sparse Recovery for Bistatic MIMO Radar Imaging in the Presence of Array Gain Uncertainties by Jun Li, Shengqi Zhu, Xixi Chen, Li Lv, Guisheng Liao, Menglei Yi

“…A sparse recovery based transmit-receive angle imaging scheme is proposed for bistatic multiple-input multiple-output (MIMO) radar. The redundancy of the transmit and receive angles in the same range cell is exploited to construct the sparse model. …”
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A Novel Simulator of Nonstationary Random MIMO Channels in Rayleigh Fading Scenarios by Qiuming Zhu, Xinglin Liu, Xuefeng Yin, Xiaomin Chen, Cuiwei Xue

“…For simulations of nonstationary multiple-input multiple-output (MIMO) Rayleigh fading channels in time-variant scattering environments, a novel channel simulator is proposed based on the superposition of chirp signals. …”
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Experimental Investigation of Milling Stability based on a Method for Stability Prediction by Zhang Kaifei, Jin Gang

“…Aiming at the problem of chatter vibration during milling,a new method for solving multiple time delays system is presented to predict the stability in the process of milling cutter. …”
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Noether symmetry of multi-delay Birkhoffian system and its conserved quantity by Xin-Yu Du, Xiang-Hua Zhai

“…The Birkhoffian system, an important mechanical system in analytical mechanics, is studied in the background of multiple time delays. Both the multi-delay Birkhoffian system and the Hamiltonian system are investigated. …”
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Construction and Capacity Analysis of High-Rank LoS MIMO Channels in High Speed Railway Scenarios by Jingya Yang, Bo Ai, Zhangdui Zhong

“…The validity of the maximum capacity criterion applied to realize high-rank line-of-sight (LoS) multiple-input multiple-output (MIMO) channels is investigated for high speed railway scenarios. …”
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Research on polymorphic routing mechanism for customized diversified services by Yu-xiang HU, Fang DONG, Peng WANG, Ju-long LAN

“…How to provide diversified routing services for various applications based on limited and constant network resources has become the urgent challenge.Based on the network self-organization and self-adjustment researches on the adaptive matching between routing and application was made,and a polymorphic routing model for customized diversified services was provided.By adaptive self-matching of basic macro-core of the network routing architecture the derivation and inheritance of customized addressing and routing mechanisms could be realized.Then the network to self-adjust for various routing services was dynamical,and therefore the co-existence of multiple modes and multiple morphologies of routing and addressing mechanisms was allowed.…”
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Present value of firm in case of correlated defaults by Mantas Valužis

“…We showed that the valuation of portfolio credit risk can be interpreted as a valuation of the multiple contingent option. In this article, some results for valuation of multiple contingent options are generalized in case of stochastic barriers and the financial interpretation is given. …”
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A Case of Coronary Vasospasm after Repeat Rituximab Infusion by Calvin Ke, Amit Khosla, Margot K. Davis, Cameron Hague, Mustafa Toma

“…CAV occurring after multiple exposures to rituximab has not been previously described. …”
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Finite eigenfuction approximations for continuous spectrum operators by Robert M. Kauffman

“…In this paper, we introduce a new formulation of the theory of continuous spectrum eigenfunction expansions for self-adjoint operators and analyze the question of when operators may be approximated in an operator norm by finite sums of multiples of eigenprojections of multiplicity one. …”
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Method of overall resource efficiency measure of MIMO wireless communications by Jin-zhu LIU, Lian-feng SHEN

“…A general mode of overall resource efficiency measure of communication systems is proposed.Based on it,the specific method of overall resource efficiency measure of multiple input multiple output (MIMO) wireless communica-tion systems is presented.The theory analysis and practice measure results show that although the requirements of the normalized bandwidth and the normalized signal noise ratio (SNR) of MIMO systems are relatively small due to the utilization of the space resource,but the overall resource efficiencies of the existing MIMO systems are low,and the gaps between their performances and their potential capacities are large,when compared to that of the existing communication systems under the basic additive white Gaussian noise (AWGN) channel.…”
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An Interference Links Selection Method Based on Genetic Algorithm by Juan Meng, Li Hong, Yanan Li, Zhiming Han, Lili Guo

“…Focusing on interference alignment with partial interference links in multi-cell multiple input multiple output （MIMO）networks, an interference links selection scheme was proposed based on genetic algorithm. …”
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Channel state information acquisition algorithm based on deep learning for IoT by Yong LIAO, Haimei YAO, Yuanxiao HUA

“…To solve the problem of high feedback overhead when the user sends channel state information (CSI) to the base station in massive multiple input multiple output (MIMO) based on Internet of things system,a CSI feedback network based on deep learning was proposed to feedback CSI.Firstly,the proposed network used convolutional neural network (CNN) to extract channel feature vectors and maxpooling to compress the data.Then the compressed CSI was decompressed by using full connection and CNN to restore the original channel.The simulation results show that compared with the existing CSI feedback methods,the CSI recovered by the proposed CSI feedback network is closer to the original channel,and the reconstruction quality is improved significantly.…”
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The Analytical Solutions of the Stochastic Fractional RKL Equation via Jacobi Elliptic Function Method by Farah M. Al-Askar, Wael W. Mohammed

“…Finally, we demonstrate that multiplicative noise stabilizes the analytical solutions of SFRKLE at zero.…”
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Design of SCMA codebook based on chaotic signal and system performance analysis by Geng ZHAO, Yanyan MA, Yingjie MA

“…Sparse code multiple access (SCMA) technology is one of the multiple access technology schemes for the new generation of 5G.In order to solve the transmission requirement of massive users,the logistic chaos sequence was proposed instead of the random sequence in the original system to select the codeword.The constellation method based on trellis coded modulation (TCM) subset segmentation with the mapping matrix was used to generate codebook in the encoder,and decoded through message passing algorithm (MPA) detection method.The simulation results show that the bit error rate (BER) is low when the system uses the pseudo-random sequence of chaos to select the codeword,and the system also performs well under the condition of high overload rate.…”
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Imaging Internal Defects with Synthetic and Experimental Data by Hongwei Zhou, Guanghui Hu, Ling Ma

“…We apply the Kirchhoff migration scheme to locate the position of small objects from both synthetic and experimental data. The multiple-input-multiple-out scheme is used to recover extended scatterers from the data generated by the software GprMax. …”
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