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: "prototyping real time full duplex radios"
  Abstract: In this article, we present a real-time full duplex radio system for 5G wireless networks. Full duplex radios are capable of opening new possibilities in contexts of high traffic demand where there are limited radio resources. A critical issue, however, to implementing full duplex radios, in real wireless environments, is being able to cancel self-interference. To overcome the self-interference challenge, we prototype our design on a software-defined radio (SDR) platform. This design combines a dual-polarization antenna-based analog part with a digital self-interference canceller that operates in real-time. Prototype test results confirm that the proposed full-duplex system achieves about 1.9 times higher throughput than a half-duplex system. This article concludes with a discussion of implementationchallenges that remain for researchers seeking the most viable solution for full duplex communications.

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"
    - "filtered ofdm enabler for flexible waveform in the 5th generation cellular networks"
    - "performance analysis of massive mimo for cell boundary users"

Connected through hyperedge HE-2 (induced by source paper "hybrid scheduling in heterogeneous half and full duplex wireless networks"):
  with members:
    - "open access full duplex wireless in the orbit testbed"
    - "resource allocation and rate gains in practical full duplex systems"
    - "on the capacity regions of single channel and multi channel full duplex links"
    - "probabilistic medium access control for full duplex networks with half duplex clients"
    - "queue based random access algorithms fluid limits and stability issues"
    - "in band full duplex wireless challenges and opportunities"
    - "experiment driven characterization of full duplex wireless systems"
    - "pushing the limits of full duplex design and real time implementation"

Connected through hyperedge HE-3 (induced by source paper "opportunism in dynamic spectrum access for 5g a concept and its application to duplexing"):
  with members:
    - "sense and predict opportunistic mac based on spatial interference correlation for cognitive radio networks"
    - "compact full duplex mimo radios in d2d underlaid cellular networks from system design to prototype results"
    - "full duplex cognitive radio a new design paradigm for enhancing spectrum usage"

Connected through hyperedge HE-4 (induced by source paper "on the feasibility of full duplex large scale mimo cellular systems"):
  with members:
    - "full duplex cloud radio access network stochastic design and analysis"
    - "multi cell massive mimo beamforming in assuring qos for large numbers of users"
    - "compact full duplex mimo radios in d2d underlaid cellular networks from system design to prototype results"
    - "massive mimo ten myths and one critical question"
    - "performance analysis of massive mimo for cell boundary users"
    - "compressed channel feedback for correlated massive mimo systems"
    - "performance analysis of self interference cancellation methods in full duplex large scale mimo systems"
    - "opportunistic scheduling for full duplex uplink downlink networks"

Connected through hyperedge HE-5 (induced by source paper "on the performance of x duplex relaying"):
  with members:
    - "passive self interference suppression for full duplex infrastructure nodes"
    - "in band full duplex wireless challenges and opportunities"
    - "experiment driven characterization of full duplex wireless systems"
    - "full duplex bidirectional mimo achievable rates under limited dynamic range"

Connected through hyperedge HE-6 (induced by source paper "full duplex operations in wireless powered communication networks"):
  with members:
    - "optimal resource allocation in full duplex wireless powered communication network"
    - "full duplex wireless powered communication network with energy causality"
    - "throughput maximization in wireless powered communication networks"
    - "full duplex bidirectional mimo achievable rates under limited dynamic range"

Connected through hyperedge HE-7 (induced by source paper "amplify and forward two way relaying system over free space optics channels"):
  with members:
    - "performance analysis of massive mimo for cell boundary users"
    - "compressed channel feedback for correlated massive mimo systems"
    - "impact of pointing errors on the performance of mixed rf fso dual hop transmission systems"

Connected through hyperedge HE-8 (induced by source paper "on the spectral efficiency and fairness in full duplex cellular networks"):
  with members:
    - "distributed spectral efficiency maximization in full duplex cellular networks"

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)