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: "simultaneous information and energy transfer a two user miso interference channel case"
  Abstract: This paper considers the sum rate maximization problem of a two-user multiple-input single-output interference channel with receivers that can scavenge energy from the radio signals transmitted by the transmitters. We first study the optimal transmission strategy for an ideal scenario where the two receivers can simultaneously decode the information signal and harvest energy. Then, considering the limitations of the current circuit technology, we propose two practical schemes based on TDMA, where, at each time slot, the receiver either operates in the energy harvesting mode or in the information detection mode. Optimal transmission strategies for the two practical schemes are respectively investigated. Simulation results show that the three schemes exhibit interesting tradeoff between achievable sum rate and energy harvesting requirement, and do not dominate each other in terms of maximum achievable sum rate.

Connected through hyperedge HE-1 (induced by source paper "wireless powered communication opportunities and challenges"):
  with members:
    - "secrecy wireless information and power transfer in fading wiretap channel"
    - "throughput optimization for massive mimo systems powered by wireless energy transfer"
    - "collaborative wireless energy and information transfer in interference channel"
    - "robust beamforming for secure communication in systems with wireless information and power transfer"
    - "recent advances in joint wireless energy and information transfer"
    - "user cooperation in wireless powered communication networks"
    - "optimal resource allocation in full duplex wireless powered communication network"
    - "energy beamforming with one bit feedback"

Connected through hyperedge HE-2 (induced by source paper "throughput optimization for massive mimo systems powered by wireless energy transfer"):
  with members:
    - "wireless powered communication opportunities and challenges"
    - "energy beamforming with one bit feedback"
    - "full duplex wireless powered communication network with energy causality"
    - "multiuser miso beamforming for simultaneous wireless information and power transfer"
    - "dynamic resource allocation for multiple antenna wireless power transfer"
    - "throughput maximization in wireless powered communication networks"
    - "energy efficient optimization for wireless information and power transfer in large scale mimo systems employing energy beamforming"
    - "opportunistic wireless energy harvesting in cognitive radio networks"

Connected through hyperedge HE-3 (induced by source paper "collaborative wireless energy and information transfer in interference channel"):
  with members:
    - "robust beamforming for secure communication in systems with wireless information and power transfer"
    - "power allocation strategies in energy harvesting wireless cooperative networks"
    - "secrecy wireless information and power transfer with miso beamforming"
    - "multiuser miso beamforming for simultaneous wireless information and power transfer"
    - "joint transmit beamforming and receive power splitting for miso swipt systems"
    - "interactive joint transfer of energy and information"
    - "simultaneous information and power transfer for broadband wireless systems"
    - "wireless information and power transfer in multiuser ofdm systems"

Connected through hyperedge HE-4 (induced by source paper "recent advances in joint wireless energy and information transfer"):
  with members:
    - "secrecy wireless information and power transfer in fading wiretap channel"
    - "throughput optimization for massive mimo systems powered by wireless energy transfer"
    - "collaborative wireless energy and information transfer in interference channel"
    - "user cooperation in wireless powered communication networks"
    - "optimal resource allocation in full duplex wireless powered communication network"
    - "energy beamforming with one bit feedback"
    - "full duplex wireless powered communication network with energy causality"
    - "optimized training design for wireless energy transfer"

Connected through hyperedge HE-5 (induced by source paper "secrecy wireless information and power transfer with miso beamforming"):
  with members:
    - "multiuser miso beamforming for simultaneous wireless information and power transfer"
    - "spatially selective artificial noise aided transmit optimization for miso multi eves secrecy rate maximization"
    - "joint wireless information and energy transfer in a k user mimo interference channel"
    - "a novel mode switching scheme utilizing random beamforming for opportunistic energy harvesting"
    - "wireless information and power transfer a dynamic power splitting approach"
    - "wireless information transfer with opportunistic energy harvesting"
    - "wireless information and power transfer architecture design and rate energy tradeoff"
    - "robust secure transmission in miso channels based on worst case optimization"

Connected through hyperedge HE-6 (induced by source paper "wireless information and energy transfer in multi antenna interference channel"):
  with members:
    - "joint transmit beamforming and receive power splitting for miso swipt systems"
    - "coordinated beamforming for multiuser miso interference channel under rate outage constraints"
    - "throughput maximization for the gaussian relay channel with energy harvesting constraints"
    - "throughput optimal policies for energy harvesting wireless transmitters with non ideal circuit power"
    - "cognitive energy harvesting and transmission from a network perspective"
    - "distributed robust multicell coordinated beamforming with imperfect csi an admm approach"
    - "wireless information and power transfer architecture design and rate energy tradeoff"
    - "on the transfer of information and energy in multi user systems"

Connected through hyperedge HE-7 (induced by source paper "joint transmit beamforming and receive power splitting for miso swipt systems"):
  with members:
    - "secrecy wireless information and power transfer with miso beamforming"
    - "multiuser miso beamforming for simultaneous wireless information and power transfer"
    - "simultaneous information and power transfer for broadband wireless systems"
    - "wireless information and power transfer in multiuser ofdm systems"
    - "relaying protocols for wireless energy harvesting and information processing"
    - "a novel mode switching scheme utilizing random beamforming for opportunistic energy harvesting"
    - "wireless information and power transfer a dynamic power splitting approach"
    - "wireless information transfer with opportunistic energy harvesting"

Connected through hyperedge HE-8 (induced by source paper "joint wireless information and energy transfer in a k user mimo interference channel"):
  with members:
    - "simultaneous information and power transfer for broadband wireless systems"
    - "relaying protocols for wireless energy harvesting and information processing"
    - "optimal scheduling and power allocation for two hop energy harvesting communication systems"
    - "wireless information transfer with opportunistic energy harvesting"
    - "sum rate optimal power policies for energy harvesting transmitters in an interference channel"
    - "transmission with energy harvesting nodes in fading wireless channels optimal policies"
    - "mimo broadcasting for simultaneous wireless information and power transfer"
    - "information capacity of energy harvesting sensor nodes"

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)