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: "capacity and character expansions moment generating function and other exact results for mimo correlated channels"
  Abstract: A promising new method from the field of representations of Lie groups is applied to calculate integrals over unitary groups, which are important for multiantenna communications. To demonstrate the power and simplicity of this technique, a number of recent results are rederived, using only a few simple steps. In particular, we derive the joint probability distribution of eigenvalues of the matrix GGdagger , with G a nonzero mean or a semicorrelated Gaussian random matrix. These joint probability distribution functions can then be used to calculate the moment generating function of the mutual information for Gaussian multiple-input multiple-output (MIMO) channels with these probability distribution of their channel matrices G. We then turn to the previously unsolved problem of calculating the moment generating function of the mutual information of MIMO channels, which are correlated at both the receiver and the transmitter. From this moment generating function we obtain the ergodic average of the mutual information and study the outage probability. These methods can be applied to a number of other problems. As a particular example, we examine unitary encoded space-time transmission of MIMO systems and we derive the received signal distribution when the channel matrix is correlated at the transmitter end

Connected through hyperedge HE-1 (induced by source paper "on the capacity of fractal d2d social networks with hierarchical communications"):
  with members:
    - "not call me cellular any more the emergence of scaling law fractal patterns and small world in wireless networks"
    - "wireless fractal cellular networks"
    - "fundamental limits on throughput capacity in information centric networks"
    - "network capacity region and minimum energy function for a delay tolerant mobile ad hoc network"
    - "systematic topology analysis and generation using degree correlations"
    - "evaluating mobility pattern space routing for dtns"

Connected through hyperedge HE-2 (induced by source paper "artificial noisy mimo systems under correlated scattering rayleigh fading a physical layer security approach"):
  with members:
    - "robust secure transmission of using main lobe integration based leakage beamforming in directional modulation mu mimo systems"
    - "enhancing the physical layer security of non orthogonal multiple access in large scale networks"
    - "artificial noise revisited"
    - "training and feedback optimization for multiuser mimo downlink"
    - "the secrecy capacity of the mimo wiretap channel"

Connected through hyperedge HE-3 (induced by source paper "asymptotic outage analysis of spatially correlated rayleigh mimo channels"):
  with members:
    - "ultra reliable and low latency wireless communication tail risk and scale"
    - "energy latency tradeoff in ultra reliable low latency communication with retransmissions"
    - "mimo diversity in the presence of double scattering"

Connected through hyperedge HE-4 (induced by source paper "secrecy rate of distributed cooperative mimo in the presence of multi antenna eavesdropper"):
  with members:
    - "cooperative secure transmission by exploiting social ties in random networks"
    - "on secrecy performance of antenna selection aided mimo systems against eavesdropping"
    - "optimal signaling for secure communications over gaussian mimo wiretap channels"
    - "optimization of code rates in sisome wiretap channels"
    - "secure and green swipt in distributed antenna networks with limited backhaul capacity"
    - "power allocation in mimo wiretap channel with statistical csi and finite alphabet input"
    - "on secrecy capacity of fast fading mimome wiretap channels with statistical csit"
    - "full rank solutions for the mimo gaussian wiretap channel with an average power constraint"

Connected through hyperedge HE-5 (induced by source paper "on the capacity of wireless networks with fractal and hierarchical social communications"):
  with members:
    - "on the capacity of fractal wireless networks with direct social interactions"
    - "wireless fractal cellular networks"
    - "fundamental limits on throughput capacity in information centric networks"
    - "systematic topology analysis and generation using degree correlations"

Connected through hyperedge HE-6 (induced by source paper "on the exact and approximate eigenvalue distribution for sum of wishart matrices"):
  with members:
    - "new results on the sum of gamma random variates with application to the performance of wireless communication systems over nakagami m fading channels"
    - "mimo multichannel beamforming ser and outage using new eigenvalue distributions of complex noncentral wishart matrices"

Connected through hyperedge HE-7 (induced by source paper "outage capacity of rayleigh product channels a free probability approach"):
  with members:
    - "from multi keyholes to measure of correlation and power imbalance in mimo channels outage capacity analysis"
    - "asymptotic capacity and optimal precoding in mimo multi hop relay networks"
    - "living at the edge a large deviations approach to the outage mimo capacity"
    - "asymptotic analysis of double scattering channels"
    - "finite snr diversity multiplexing tradeoff via asymptotic analysis of large mimo systems"
    - "diversity multiplexing tradeoff of double scattering mimo channels"
    - "approximately universal codes over slow fading channels"

Connected through hyperedge HE-8 (induced by source paper "the diversity multiplexing tradeoff of the dynamic decode and forward protocol on a mimo half duplex relay channel"):
  with members:
    - "the diversity multiplexing tradeoff of the mimo half duplex relay channel"
    - "the diversity multiplexing tradeoff of the symmetric mimo 2 user interference channel"
    - "the diversity multiplexing tradeoff of the mimo z interference channel"
    - "the diversity multiplexing tradeoff of the symmetric mimo half duplex relay channel"
    - "diversity multiplexing tradeoff for the mimo static half duplex relay"
    - "diversity multiplexing tradeoff of the half duplex relay channel"

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)