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: "outage probability of dual hop multiple antenna af relaying systems with interference"
  Abstract: This paper presents an analytical investigation on the outage performance of dual-hop multiple antenna amplify-and-forward relaying systems in the presence of interference. For both the fixed-gain and variable-gain relaying schemes, exact analytical expressions for the outage probability of the systems are derived. Moreover, simple outage probability approximations at the high signal-to-noise-ratio regime are provided, and the diversity order achieved by the systems are characterized. Our results suggest that variable-gain relaying systems always outperform the corresponding fixed-gain relaying systems. In addition, the fixed-gain relaying schemes only achieve diversity order of one, while the achievable diversity order of the variable-gain relaying scheme depends on the location of the multiple antennas.

Connected through hyperedge HE-1 (induced by source paper "wireless information and power transfer in relay systems with multiple antennas and interference"):
  with members:
    - "information and energy cooperation in cognitive radio networks"
    - "outage probability of dual hop multiple antenna af systems with linear processing in the presence of co channel interference"
    - "power allocation strategies in energy harvesting wireless cooperative networks"
    - "ergodic capacity comparison of different relay precoding schemes in dual hop af systems with co channel interference"
    - "secrecy wireless information and power transfer with miso beamforming"
    - "multiuser miso beamforming for simultaneous wireless information and power transfer"
    - "simultaneous information and energy transfer in large scale networks with without relaying"
    - "wireless information and energy transfer in multi antenna interference channel"

Connected through hyperedge HE-2 (induced by source paper "ergodic capacity comparison of different relay precoding schemes in dual hop af systems with co channel interference"):
  with members:
    - "outage probability of dual hop multiple antenna af systems with linear processing in the presence of co channel interference"
    - "a new formula for the ber of binary modulations with dual branch selection over generalized k"
    - "ergodic capacity analysis of amplify and forward mimo dual hop systems"
    - "mimo networks the effects of interference"

Connected through hyperedge HE-3 (induced by source paper "outage probability of dual hop multiple antenna af systems with linear processing in the presence of co channel interference"):
  with members:
    - "multi pair amplify and forward relaying with very large antenna arrays"

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)