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: "can visible light communications provide gb s service"
  Abstract: Visible light communications (VLC) that use the infrastructure of the indoor illumination system have been envisioned as a compact, safe, and green alternative to WiFi for the downlink of an indoor wireless mobile communication system. Although the optical spectrum is typically well-suited to high throughput applications, combining communications with indoor lighting in a commercially viable system imposes severe limitations both in bandwidth and received power. Clever techniques are needed to achieve Gb/s transmission, and to do it in a cost effective manner so as to successfully compete with other high-capacity alternatives for indoor access, such as millimeter-wave radio-frequency (RF). This article presents modulation schemes that have the potential to overcome the many challenges faced by VLC in providing multi Gb/s indoor wireless connectivity.

Connected through hyperedge HE-1 (induced by source paper "cooperative object detection and parameter estimation using visible light communications"):
  with members:
    - "positioning for visible light communication system exploiting multipath reflections"

Connected through hyperedge HE-2 (induced by source paper "distributions of upper papr and lower papr of ofdm signals in visible light communications"):
  with members:
    - "brightness control in dynamic range constrained visible light ofdm systems"
    - "evm and achievable data rate analysis of clipped ofdm signals in visible light communication"

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)