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 performance of multi antenna wireless powered communications with energy beamforming"
  Abstract: In this paper, we study the average throughput performance of energy beamforming in a multi-antenna wireless-powered communication network (WPCN). The considered network consists of one hybrid access point (AP) with multiple antennas and a single-antenna user. The user has no constant power supply and, thus, needs to harvest energy from the signals broadcast by the AP in the downlink (DL) before sending its data back to the AP with the harvested energy in the uplink (UL). We derive closed-form expressions of the average throughput and their asymptotic expressions at a high SNR for both delay-limited and delay-tolerant transmission modes. The optimal DL energy harvesting time, which maximizes the system throughput, is then obtained for high SNR. All analytical expressions are validated by numerical simulations. The impact of various parameters, such as the AP transmit power, the energy harvesting time, and the number of antennas, on the system throughput is also investigated.

Connected through hyperedge HE-1 (induced by source paper "statistical analysis of multiple antenna strategies for wireless energy transfer"):
  with members:
    - "rate control for wireless powered communication network with reliability and delay constraints"
    - "fundamentals of wireless information and power transfer from rf energy harvester models to signal and system designs"
    - "ultra reliable cooperative short packet communications with wireless energy transfer"
    - "on the beneficial roles of fading and transmit diversity in wireless power transfer with nonlinear energy harvesting"
    - "wireless information and power transfer nonlinearity waveform design and rate energy tradeoff"
    - "wireless powered communication networks an overview"
    - "communications and signals design for wireless power transmission"
    - "wireless powered communication opportunities and challenges"

Connected through hyperedge HE-2 (induced by source paper "d2d communications underlaying wireless powered communication networks"):
  with members:
    - "wireless networks with energy harvesting and power transfer joint power and time allocation"
    - "wireless powered communication opportunities and challenges"
    - "throughput optimization for massive mimo systems powered by wireless energy transfer"
    - "wireless networks with rf energy harvesting a contemporary survey"
    - "throughput maximization in wireless powered communication networks"
    - "simultaneous information and power transfer for broadband wireless systems"

Connected through hyperedge HE-3 (induced by source paper "wireless powered dual hop multi antenna relaying systems impact of csi and antenna correlation"):
  with members:
    - "an overview of sustainable green 5g networks"
    - "training based swipt optimal power splitting at the receiver"
    - "joint wireless information and power transfer for an autonomous multiple antenna relay system"
    - "wireless powered communications performance analysis and optimization"
    - "energy efficient resource allocation for wireless powered communication networks"
    - "wireless information and power transfer in relay systems with multiple antennas and interference"
    - "harvest then cooperate wireless powered cooperative communications"
    - "wireless networks with rf energy harvesting a contemporary survey"

Connected through hyperedge HE-4 (induced by source paper "optimization and analysis of wireless powered multi antenna cooperative systems"):
  with members:
    - "relaying strategies for wireless powered mimo relay networks"
    - "wireless powered communication opportunities and challenges"
    - "on the efficiency of far field wireless power transfer"
    - "wireless powered communications performance analysis and optimization"
    - "energy efficient resource allocation for wireless powered communication networks"
    - "optimum wirelessly powered relaying"
    - "spatial throughput maximization of wireless powered communication networks"
    - "harvest then cooperate wireless powered cooperative communications"

Connected through hyperedge HE-5 (induced by source paper "beamforming optimization for full duplex wireless powered mimo systems"):
  with members:
    - "throughput analysis and optimization of wireless powered multiple antenna full duplex relay systems"
    - "wireless powered communication networks an overview"
    - "communications and signals design for wireless power transmission"
    - "weighted sum transmit power minimization for full duplex system with swipt and self energy recycling"
    - "multipair full duplex relaying with massive arrays and linear processing"
    - "optimal resource allocation in full duplex wireless powered communication network"
    - "wireless networks with rf energy harvesting a contemporary survey"
    - "low complexity end to end performance optimization in mimo full duplex relay systems"

Connected through hyperedge HE-6 (induced by source paper "on the performance of wireless powered communication with non linear energy harvesting"):
  with members:
    - "performance analysis of energy buffer aided wireless powered communication"
    - "robust resource allocation for mimo wireless powered communication networks based on a non linear eh model"
    - "wireless powered communication networks an overview"
    - "communications and signals design for wireless power transmission"
    - "practical non linear energy harvesting model and resource allocation for swipt systems"
    - "energy efficient resource allocation for wireless powered communication networks"
    - "simultaneous wireless information and power transfer in modern communication systems"
    - "wireless networks with rf energy harvesting a contemporary survey"

Connected through hyperedge HE-7 (induced by source paper "distributed and optimal resource allocation for power beacon assisted wireless powered communications"):
  with members:
    - "wireless powered communication opportunities and challenges"
    - "distributed power splitting for swipt in relay interference channels using game theory"
    - "an adaptive transmission protocol for wireless powered cooperative communications"
    - "collaborative wireless energy and information transfer in interference channel"
    - "enhancing wireless information and power transfer by exploiting multi antenna techniques"
    - "harvest then cooperate wireless powered cooperative communications"
    - "user cooperation in wireless powered communication networks"
    - "cutting last wires for mobile communication by microwave power transfer"

Connected through hyperedge HE-8 (induced by source paper "a discrete time switching protocol for wireless powered communications with energy accumulation"):
  with members:
    - "an adaptive transmission protocol for wireless powered cooperative communications"
    - "harvest then cooperate wireless powered cooperative communications"
    - "throughput maximization in wireless powered communication networks"
    - "multi antenna wireless powered communication with energy beamforming"

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)