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: "modeling interference between ofdm oqam and cp ofdm limitations of the psd based model"
  Abstract: To answer the challenges put out by the next generation of wireless networks (5G), important research efforts have been undertaken during the last few years to find new waveforms that are better spectrally localized and less sensitive to asynchronism effects than the widely deployed Cyclic Prefix Orthogonal Frequency Division Multiplexing (CP-OFDM). One of the most studied schemes is OFDM-Offset Quadrature Amplitude Modulation (OFDM/OQAM) based on the PHYDYAS filter pulse. In the recent literature, spectrum coexistence between OFDM/OQAM and CP-OFDM is commonly studied based on the Power Spectral Density (PSD) model. In this paper, we show that this approach is flawed and we show that the actual interference injected by OFDM/OQAM systems onto CP-OFDM is much higher than what is classically expected with the PSD based model in the literature. We show that though using OFDM/OQAM in secondary systems is still advantageous, it brings limited gain in the context of coexistence with incumbent CP-OFDM systems.

Connected through hyperedge HE-1 (induced by source paper "on spectral coexistence of cp ofdm and fb mc waveforms in 5g networks"):
  with members:
    - "coexistence in 5g analysis of cross interference between ofdm oqam and legacy users"
    - "coexistence of filter banks and cp ofdm what are the real gains"
    - "5g waveforms for overlay d2d communications effects of time frequency misalignment"
    - "coexistence of ofdm and fbmc for underlay d2d communication in 5g networks"
    - "what will 5g be"

Connected through hyperedge HE-2 (induced by source paper "complex systems science meets 5g and iot"):
  with members:
    - "a functional complexity framework for the analysis of telecommunication networks"
    - "throughput and coverage for a mixed full and half duplex small cell network"
    - "agent based tools for modeling and simulation of self organization in peer to peer ad hoc and other complex networks"

Connected through hyperedge HE-3 (induced by source paper "coexistence in 5g analysis of cross interference between ofdm oqam and legacy users"):
  with members:
    - "5g waveforms for overlay d2d communications effects of time frequency misalignment"
    - "impact of timing and frequency offsets on multicarrier waveform candidates for 5g"

Connected through hyperedge HE-4 (induced by source paper "coexistence of filter banks and cp ofdm what are the real gains"):
  with members:
    - "coexistence in 5g analysis of cross interference between ofdm oqam and legacy users"
    - "5g waveforms for overlay d2d communications effects of time frequency misalignment"

Connected through hyperedge HE-5 (induced by source paper "coexistence of ofdm and fbmc for underlay d2d communication in 5g networks"):
  with members:
    - "5g waveforms for overlay d2d communications effects of time frequency misalignment"

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)