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: "energy efficient power control in impulse radio uwb wireless networks"
  Abstract: In this paper, a game-theoretic model for studying power control for wireless data networks in frequency-selective multipath environments is analyzed. The uplink of an impulse-radio ultrawideband system is considered. The effects of self-interference and multiple-access interference on the performance of generic Rake receivers are investigated for synchronous systems. Focusing on energy efficiency, a noncooperative game is proposed in which users in the network are allowed to choose their transmit powers to maximize their own utilities, and the Nash equilibrium for the proposed game is derived. It is shown that, due to the frequency selective multipath, the noncooperative solution is achieved at different signal-to-interference-plus-noise ratios, depending on the channel realization and the type of Rake receiver employed. A large-system analysis is performed to derive explicit expressions for the achieved utilities. The Pareto-optimal (cooperative) solution is also discussed and compared with the noncooperative approach.

Connected through hyperedge HE-1 (induced by source paper "a learning approach for low complexity optimization of energy efficiency in multicarrier wireless networks"):
  with members:
    - "a brief introduction to machine learning for engineers"
    - "energy efficient power control a look at 5g wireless technologies"
    - "a survey of energy efficient techniques for 5g networks and challenges ahead"
    - "learning to be green robust energy efficiency maximization in dynamic mimo ofdm systems"
    - "transmit without regrets online optimization in mimo ofdm cognitive radio systems"
    - "distributed learning policies for power allocation in multiple access channels"
    - "framework for link level energy efficiency optimization with informed transmitter"

Connected through hyperedge HE-2 (induced by source paper "energy efficient power control a look at 5g wireless technologies"):
  with members:
    - "power control in networks with heterogeneous users a quasi variational inequality approach"
    - "energy aware competitive power allocation for heterogeneous networks under qos constraints"
    - "massive mimo with non ideal arbitrary arrays hardware scaling laws and circuit aware design"
    - "massive mimo systems with non ideal hardware energy efficiency estimation and capacity limits"
    - "energy efficient scheduling and power allocation in downlink ofdma networks with base station coordination"
    - "massive mimo for maximal spectral efficiency how many users and pilots should be allocated"
    - "five disruptive technology directions for 5g"
    - "energy efficiency optimization for mimo broadcast channels"

Connected through hyperedge HE-3 (induced by source paper "potential games for energy efficient resource allocation in multipoint to multipoint cdma wireless data networks"):
  with members:
    - "energy efficient precoding for multiple antenna terminals"
    - "power control in two tier femtocell networks"
    - "femtocell networks a survey"

Connected through hyperedge HE-4 (induced by source paper "energy efficient communications in cdma networks a game theoretic analysis considering operating costs"):
  with members:
    - "energy efficient resource allocation in wireless networks"
    - "a game theoretic approach to energy efficient modulation in cdma networks with delay qos constraints"
    - "randomly spread cdma asymptotics via statistical physics"

Connected through hyperedge HE-5 (induced by source paper "performance of rake receivers in ir uwb networks using energy efficient power control"):
  with members:
    - "performance evaluation of impulse radio uwb systems with pulse based polarity randomization"

Connected through hyperedge HE-6 (induced by source paper "energy efficient resource allocation in multiuser mimo systems a game theoretic framework"):
  with members:
    - "energy efficient resource allocation in wireless networks"

Connected through hyperedge HE-7 (induced by source paper "large system analysis of game theoretic power control in uwb wireless networks with rake receivers"):
  with members:
    - "performance of rake receivers in ir uwb networks using energy efficient power control"
    - "performance evaluation of impulse radio uwb systems with pulse based polarity randomization"

Connected through hyperedge HE-8 (induced by source paper "performance comparison of energy efficient power control for cdma and multiuser uwb networks"):
  with members:
    - "performance of rake receivers in ir uwb networks using energy efficient power control"
    - "performance evaluation of impulse radio uwb systems with pulse based polarity randomization"

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)