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: "statistical evaluation of the azimuth and elevation angles seen at the output of the receiving antenna"
  Abstract: A method to evaluate the statistical properties of the reception angle seen at the input receiver that considers the receiving antenna pattern is presented. In particular, the impact of the direction and beamwidth of the antenna pattern on distribution of the reception angle is shown on the basis of 3-D simulation studies. The obtained results show significant differences between the distributions of angle of arrival and the angle of reception. This means that the presented new method allows assessing the impact of the receiving antenna pattern on the correlation and spectral characteristics at the receiver input in simulation studies of wireless channel. The use of this method also provides an opportunity for analysis of coexistence between small cells and wireless backhaul, what is currently a significant problem in designing 5G networks.

Connected through hyperedge HE-1 (induced by source paper "evaluation of angular dispersion for various propagation environments in emerging 5g systems"):
  with members:
    - "comparison of angular spread for 6 and 60 ghz based on 3gpp standard"
    - "modeling the distribution of the arrival angle based on transmitter antenna pattern"
    - "local multipath model parameters for generating 5g millimeter wave 3gpp like channel impulse response"

Connected through hyperedge HE-2 (induced by source paper "radio bearing of sources with directional antennas in urban environment"):
  with members:
    - "modeling the distribution of the arrival angle based on transmitter antenna pattern"

Connected through hyperedge HE-3 (induced by source paper "path loss model modification for various gains and directions of antennas"):
  with members:
    - "modeling the distribution of the arrival angle based on transmitter antenna pattern"

Connected through hyperedge HE-4 (induced by source paper "comparison of angular spread for 6 and 60 ghz based on 3gpp standard"):
  with members:
    - "modeling the distribution of the arrival angle based on transmitter antenna pattern"

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)