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: "practical full duplex physical layer network coding"
  Abstract: We propose a practical network code for the wireless two-way relay channel where all nodes communicate in full duplex (FD) mode. The physical layer network coding (PNC) operation is applied with the FD operating nodes, reducing the transmission time to a single time slot, hence doubling the spectral efficiency when compared to classical PNC systems. In our system model, binary phase shift keying modulated signals are transmitted over Rayleigh fading channels. We derive the theoretical error rates at relay and end nodes according to the maximum likelihood detection rule, in case of non-ideal self-interference cancellation. Theoretical results are also verified via simulations.

Connected through hyperedge HE-1 (induced by source paper "joint inter flow network coding and opportunistic routing in multi hop wireless mesh networks a comprehensive survey"):
  with members:
    - "flexonc joint cooperative forwarding and network coding with precise encoding conditions"
    - "network coding implementation details a guidance document"
    - "cror coding aware opportunistic routing in multi channel cognitive radio networks"
    - "systematic network coding with the aid of a full duplex relay"
    - "network coding meets multimedia a review"
    - "cormen coding aware opportunistic routing in wireless mess network"
    - "polynomial time algorithms for multirate anypath routing in wireless multihop networks"

Connected through hyperedge HE-2 (induced by source paper "beamforming design for full duplex two way amplify and forward mimo relay"):
  with members:
    - "joint beamforming optimization and power control for full duplex mimo two way relay channel"
    - "joint source and relay precoding designs for mimo two way relaying based on mse criterion"

Connected through hyperedge HE-3 (induced by source paper "joint beamforming optimization and power control for full duplex mimo two way relay channel"):
  with members:
    - "passive self interference suppression for full duplex infrastructure nodes"
    - "low complexity end to end performance optimization in mimo full duplex relay systems"
    - "in band full duplex wireless challenges and opportunities"
    - "experiment driven characterization of full duplex wireless systems"
    - "on cooperative relaying schemes for wireless physical layer security"
    - "optimal beamforming for two way multi antenna relay channel with analogue network coding"

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)