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: "impact of timing and frequency offsets on multicarrier waveform candidates for 5g"
  Abstract: This paper presents a study of the candidate waveforms for 5G when they are subject to timing and carrier frequency offset. These waveforms are: orthogonal frequency division multiplexing (OFDM), generalized frequency division multiplexing (GFDM), universal filtered multicarrier (UFMC), circular filter bank multicarrier (C-FBMC), and linear filter bank multicarrier (FBMC). We are particularly interested in multiple access interference (MAI) when a number of users transmit their signals to a base station in an asynchronous or a quasi-synchronous manner. We identify the source of MAI in these waveforms and present some numerical analysis that confirm our findings. The goal of this study is to answer the following question, "Which one of the 5G candidate waveforms has more relaxed synchronization requirements?".

Connected through hyperedge HE-1 (induced by source paper "filter bank multicarrier in massive mimo analysis and channel equalization"):
  with members:
    - "prototype filter design for fbmc in massive mimo channels"
    - "cell free massive mimo versus small cells"
    - "ofdm without cp in massive mimo"
    - "frequency spreading equalization in multicarrier massive mimo"
    - "filter bank multicarrier for massive mimo"
    - "pilot decontamination in cmt based massive mimo networks"
    - "five disruptive technology directions for 5g"
    - "scaling up mimo opportunities and challenges with very large arrays"

Connected through hyperedge HE-2 (induced by source paper "5g wireless and wired convergence in a passive optical network using uf ofdm and gfdm"):
  with members:
    - "low complexity modem design for gfdm"
    - "what will 5g be"

Connected through hyperedge HE-3 (induced by source paper "prototype filter design for fbmc in massive mimo channels"):
  with members:
    - "massive mimo and waveform design for 5th generation wireless communication systems"
    - "frequency spreading equalization in multicarrier massive mimo"
    - "filter bank multicarrier for massive mimo"
    - "pilot decontamination in cmt based massive mimo networks"
    - "five disruptive technology directions for 5g"
    - "energy and spectral efficiency of very large multiuser mimo systems"

Connected through hyperedge HE-4 (induced by source paper "coexistence in 5g analysis of cross interference between ofdm oqam and legacy users"):
  with members:
    - "modeling interference between ofdm oqam and cp ofdm limitations of the psd based model"
    - "5g waveforms for overlay d2d communications effects of time frequency misalignment"

Connected through hyperedge HE-5 (induced by source paper "modeling interference between ofdm oqam and cp ofdm limitations of the psd based model"):
  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)