human: Given a node-centered hypergraph: <hypergraph>, where nodes represent papers and hyperedges represent sets of papers co-cited by a source paper.

Details of the hypergraph:
Center node: "on the feasibility of wireless energy transfer using massive antenna arrays"
  Abstract: We illustrate potential benefits of using massive antenna arrays for wireless energy transfer (WET). Specifically, we analyze probability of outage in WET over fading channels when a base station (BS) with multiple antennas beamforms energy to a wireless sensor node (WSN). Our analytical results show that by using massive antenna arrays, the range of WET can be increased for a given target outage probability. We prove that by using multiple-antenna arrays at the BS, a lower downlink energy is required to get the same outage performance, resulting in savings of radiated energy. We show that for energy levels used in WET, the outage performance with least-squares or minimum mean-square-error channel estimates is the same as that obtained based on perfect channel estimates. We observe that a strong line-of-sight component between the BS and WSN lowers outage probability. Furthermore, by deploying more antennas at the BS, a larger energy can be transferred reliably to the WSN at a given target outage performance for the sensor to be able to perform its main tasks. In our numerical examples, the RF power received at the input of the sensor is assumed to be on the order of a mW, such that the rectenna operates at an efficiency in the order of 50%.

Connected through hyperedge HE-1 (induced by source paper "wirelessly powered sensor networks power allocation for channel estimation and energy beamforming"):
  with members:
    - "cluster based wireless energy transfer for low complex energy receivers"
    - "wireless energy beamforming using received signal strength indicator feedback"
    - "on the beneficial roles of fading and transmit diversity in wireless power transfer with nonlinear energy harvesting"
    - "waveform design for wireless power transfer with limited feedback"
    - "distributed wireless power transfer with energy feedback"
    - "robust resource allocation for mimo wireless powered communication networks based on a non linear eh model"
    - "waveform design for wireless power transfer"
    - "wireless information and power transfer nonlinearity waveform design and rate energy tradeoff"

Connected through hyperedge HE-2 (induced by source paper "design of an miso swipt aided code index modulated multi carrier m dcsk system for e health iot"):
  with members:
    - "fundamentals of wireless information and power transfer from rf energy harvester models to signal and system designs"
    - "modulation design for wireless information and power transfer with nonlinear energy harvester modeling"
    - "rate energy region in wireless information and power transfer new receiver architecture and practical modulation"
    - "spectral efficiency of multipair massive mimo two way relaying with hardware impairments"
    - "performance analysis of mixed adc massive mimo systems over rician fading channels"
    - "achievable rate of rician large scale mimo channels with transceiver hardware impairments"
    - "iterative dynamic water filling for fading multiple access channels with energy harvesting"
    - "multiuser miso beamforming for simultaneous wireless information and power transfer"

Connected through hyperedge HE-3 (induced by source paper "leveraging linear quadratic regulator cost and energy consumption for ultra reliable and low latency iot control systems"):
  with members:
    - "twin timescale radio resource management for ultra reliable and low latency vehicular networks"
    - "ultra reliable and low latency communications for connected vehicles challenges and solutions"
    - "wireless network design for control systems a survey"
    - "high reliability and low latency for vehicular networks challenges and solutions"
    - "rate cost tradeoffs in control"
    - "blocklength limited performance of relaying under quasi static rayleigh channels"
    - "source channel coding under energy delay and buffer constraints"
    - "lossy joint source channel coding in the finite blocklength regime"

Connected through hyperedge HE-4 (induced by source paper "optimal channel estimation for hybrid energy beamforming under phase shifter impairments"):
  with members:
    - "sensitive and nonlinear far field rf energy harvesting in wireless communications"
    - "wireless energy beamforming using received signal strength indicator feedback"
    - "multiuser millimeter wave beamforming strategies with quantized and statistical csit"
    - "an overview of signal processing techniques for millimeter wave mimo systems"
    - "channel estimation for hybrid architecture based wideband millimeter wave systems"
    - "on the number of rf chains and phase shifters and scheduling design with hybrid analog digital beamforming"
    - "i q imbalance aware widely linear receiver for uplink multi cell massive mimo systems design and sum rate analysis"
    - "massive mimo ten myths and one critical question"

Connected through hyperedge HE-5 (induced by source paper "twin timescale radio resource management for ultra reliable and low latency vehicular networks"):
  with members:
    - "on low resolution adcs in practical 5g millimeter wave massive mimo systems"
    - "fractional programming for communication systems part i power control and beamforming"
    - "physical layer authentication in mission critical mtc networks a security and delay performance analysis"
    - "a two stage allocation scheme for delay sensitive services in dense vehicular networks"
    - "cross layer optimization for ultra reliable and low latency radio access networks"
    - "low latency millimeter wave communications traffic dispersion or network densification"
    - "blocklength limited performance of relaying under quasi static rayleigh channels"
    - "reliable and efficient autonomous driving the need for heterogeneous vehicular networks"

Connected through hyperedge HE-6 (induced by source paper "intelligent reflecting surface meets ofdm protocol design and rate maximization"):
  with members:
    - "capacity characterization for intelligent reflecting surface aided mimo communication"
    - "towards smart and reconfigurable environment intelligent reflecting surface aided wireless network"
    - "intelligent reflecting surface enhanced wireless network via joint active and passive beamforming"
    - "beamforming optimization for intelligent reflecting surface with discrete phase shifts"
    - "reconfigurable intelligent surfaces for energy efficiency in wireless communication"
    - "large intelligent surface assisted wireless communication exploiting statistical csi"
    - "constant envelope precoding for mimo systems"
    - "what will 5g be"

Connected through hyperedge HE-7 (induced by source paper "optimization of power transfer efficiency and energy efficiency for wireless powered systems with massive mimo"):
  with members:
    - "robust resource allocation for mimo wireless powered communication networks based on a non linear eh model"
    - "communications and signals design for wireless power transmission"
    - "wireless powered communication opportunities and challenges"
    - "practical non linear energy harvesting model and resource allocation for swipt systems"
    - "energy harvesting wireless communications a review of recent advances"
    - "on the efficiency of far field wireless power transfer"
    - "powering the next billion devices with wi fi"
    - "is massive mimo energy efficient"

Connected through hyperedge HE-8 (induced by source paper "throughput optimization in fdd mu miso wireless powered communication networks"):
  with members:
    - "wireless powered communication networks tdd or fdd"
    - "maximizing ergodic throughput in wireless powered communication networks"
    - "distributed wireless power transfer with energy feedback"
    - "wireless power meets energy harvesting a joint energy allocation approach in ofdm based system"
    - "a general design framework for mimo wireless energy transfer with limited feedback"
    - "wireless powered communication networks an overview"
    - "wireless powered communication opportunities and challenges"
    - "throughput optimization for massive mimo systems powered by wireless energy transfer"

Question: Please tell me which class the center node belongs to. The 40 classes are: cs.NA(Numerical Analysis), cs.MM(Multimedia), cs.LO(Logic in Computer Science), cs.CY(Computers and Society), cs.CR(Cryptography and Security), cs.DC(Distributed, Parallel, and Cluster Computing), cs.HC(Human-Computer Interaction), cs.CE(Computational Engineering, Finance, and Science), cs.NI(Networking and Internet Architecture), cs.CC(Computational Complexity), cs.AI(Artificial Intelligence), cs.MA(Multiagent Systems), cs.GL(General Literature), cs.NE(Neural and Evolutionary Computing), cs.SC(Symbolic Computation), cs.AR(Hardware Architecture), cs.CV(Computer Vision and Pattern Recognition), cs.GR(Graphics), cs.ET(Emerging Technologies), cs.SY(Systems and Control), cs.CG(Computational Geometry), cs.OH(Other Computer Science), cs.PL(Programming Languages), cs.SE(Software Engineering), cs.LG(Machine Learning), cs.SD(Sound), cs.SI(Social and Information Networks), cs.RO(Robotics), cs.IT(Information Theory), cs.PF(Performance), cs.CL(Computation and Language), cs.IR(Information Retrieval), cs.MS(Mathematical Software), cs.FL(Formal Languages and Automata Theory), cs.DS(Data Structures and Algorithms), cs.OS(Operating Systems), cs.GT(Computer Science and Game Theory), cs.DB(Databases), cs.DL(Digital Libraries), cs.DM(Discrete Mathematics). Directly output the class name.

gpt: cs.IT(Information Theory)