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: "filtered ofdm enabler for flexible waveform in the 5th generation cellular networks"
  Abstract: The underlying waveform has always been a shaping factor for each generation of the cellular networks, such as orthogonal frequency division multiplexing (OFDM) for the 4th generation cellular networks (4G). To meet the diversified and pronounced expectations upon the upcoming 5G cellular networks, here we present an enabler for flexible waveform configuration, named as filtered-OFDM (f-OFDM). With the conventional OFDM, a unified numerology is applied across the bandwidth provided, balancing among the channel characteristics and the service requirements, and the spectrum efficiency is limited by the compromise we made. In contrast, with f-OFDM, the assigned bandwidth is split up into several subbands, and different types of services are accommodated in different subbands with the most suitable waveform and numerology, leading to an improved spectrum utilization. After outlining the general framework of f-OFDM, several important design aspects are also discussed, including filter design and guard tone arrangement. In addition, an extensive comparison among the existing 5G waveform candidates is also included to illustrate the advantages of f-OFDM. Our simulations indicate that, in a specific scenario with four distinct types of services, f-OFDM provides up to 46% of throughput gains over the conventional OFDM scheme.

Connected through hyperedge HE-1 (induced by source paper "ultrareliable and low latency communication techniques for tactile internet services"):
  with members:
    - "map based millimeter wave channel models an overview guidelines and data"
    - "multiple access for 5g new radio categorization evaluation and challenges"
    - "relationship between cross polarization discrimination xpd and spatial correlation in indoor small cell mimo systems"
    - "compact full duplex mimo radios in d2d underlaid cellular networks from system design to prototype results"
    - "rf lens embedded massive mimo systems fabrication issues and codebook design"
    - "degrees of freedom of full duplex cellular networks with reconfigurable antennas at base station"
    - "performance analysis of massive mimo for cell boundary users"
    - "prototyping real time full duplex radios"

Connected through hyperedge HE-2 (induced by source paper "generalized fast convolution based filtered ofdm techniques and application to 5g new radio"):
  with members:
    - "efficient fast convolution based waveform processing for 5g physical layer"

Connected through hyperedge HE-3 (induced by source paper "resource optimization with flexible numerology and frame structure for heterogeneous services"):
  with members:
    - "an examination of the benefits of scalable tti for heterogeneous traffic management in 5g networks"
    - "joint scheduling of urllc and embb traffic in 5g wireless networks"
    - "resource scheduling for mixed traffic types with scalable tti in dynamic tdd systems"
    - "a performance study of energy minimization for interleaved and localized fdma"
    - "on tractability aspects of optimal resource allocation in ofdma systems"

Connected through hyperedge HE-4 (induced by source paper "architectures and key technical challenges for 5g systems incorporating satellites"):
  with members:
    - "integration of satellites in 5g through leo constellations"

Connected through hyperedge HE-5 (induced by source paper "modulation and multiple access for 5g networks"):
  with members:
    - "power domain non orthogonal multiple access noma in 5g systems potentials and challenges"
    - "non orthogonal multiple access in large scale heterogeneous networks"
    - "capacity comparison between mimo noma and mimo oma with multiple users in a cluster"
    - "wireless powered communications with non orthogonal multiple access"
    - "nonorthogonal multiple access in large scale underlay cognitive radio networks"
    - "design of massive mimo noma with limited feedback"
    - "optimal joint power and subcarrier allocation for mc noma systems"
    - "relay selection for cooperative noma"

Connected through hyperedge HE-6 (induced by source paper "shared spectrum access communications a neutral host micro operator approach"):
  with members:
    - "ultra dense small cell networks turning density into energy efficiency"
    - "from network sharing to multi tenancy the 5g network slice broker"
    - "resource allocation in shared spectrum access communications for operators with diverse service requirements"
    - "towards 1 gbps ue in cellular systems understanding ultra dense small cell deployments"
    - "what will 5g be"
    - "spectrum leasing as an incentive towards uplink macrocell and femtocell cooperation"

Connected through hyperedge HE-7 (induced by source paper "pulse shaping design for ofdm systems"):
  with members:
    - "soft output demodulation on frequency selective rayleigh fading channels using ar channel models"

Connected through hyperedge HE-8 (induced by source paper "pulse shaped ofdm for 5g systems"):
  with members:
    - "soft output demodulation on frequency selective rayleigh fading channels using ar channel models"

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)