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: "monotonicity results for coherent mimo rician channels"
  Abstract: The dependence of the Gaussian input information rate on the line-of-sight (LOS) matrix in multiple-input multiple-output (MIMO) coherent Rician fading channels is explored. It is proved that the outage probability and the mutual information induced by a multivariate circularly symmetric Gaussian input with any covariance matrix are monotonic in the LOS matrix D, or more precisely, monotonic in D/sup /spl dagger//D in the sense of the Loewner partial order. Conversely, it is also demonstrated that this ordering on the LOS matrices is a necessary condition for the uniform monotonicity over all input covariance matrices. This result is subsequently applied to prove the monotonicity of the isotropic Gaussian input information rate and channel capacity in the singular values of the LOS matrix. Extensions to multiple-access channels (MAC) are also provided.

Connected through hyperedge HE-1 (induced by source paper "the degrees of freedom region of temporally correlated mimo networks with delayed csit"):
  with members:
    - "on the degrees of freedom of the k user time correlated broadcast channel with delayed csit"
    - "degrees of freedom of time correlated miso broadcast channel with delayed csit"
    - "on the fundamental feedback vs performance tradeoff over the miso bc with imperfect and delayed csit"
    - "the degrees of freedom region of the mimo interference channel with hybrid csit"
    - "degrees of freedom region of the miso broadcast channel with general mixed csit"
    - "optimal use of current and outdated channel state information degrees of freedom of the miso bc with mixed csit"
    - "on the degrees of freedom of time correlated miso broadcast channel with delayed csit"
    - "fundamental limits of cooperation"

Connected through hyperedge HE-2 (induced by source paper "energy efficiency optimization in relay assisted mimo systems with perfect and statistical csi"):
  with members:
    - "cooperative algorithms for mimo amplify and forward relay networks"
    - "energy efficiency optimization for mimo broadcast channels"
    - "joint source and relay precoding designs for mimo two way relaying based on mse criterion"
    - "power allocation in two hop amplify and forward mimo relay systems with qos requirements"
    - "framework for link level energy efficiency optimization with informed transmitter"
    - "energy efficient precoding for multiple antenna terminals"
    - "energy efficient resource allocation in multiuser mimo systems a game theoretic framework"
    - "on the capacity and diversity multiplexing tradeoff of the two way relay channel"

Connected through hyperedge HE-3 (induced by source paper "the dof region of the multiple antenna time correlated interference channel with delayed csit"):
  with members:
    - "degrees of freedom of time correlated miso broadcast channel with delayed csit"
    - "optimal use of current and outdated channel state information degrees of freedom of the miso bc with mixed csit"
    - "on the degrees of freedom of time correlated miso broadcast channel with delayed csit"
    - "completely stale transmitter channel state information is still very useful"
    - "the degrees of freedom of mimo interference channels without state information at transmitters"
    - "interference alignment under limited feedback for mimo interference channels"
    - "on degrees of freedom region of mimo networks without csit"
    - "a new outer bound and the noisy interference sum rate capacity for gaussian interference channels"

Connected through hyperedge HE-4 (induced by source paper "a deterministic equivalent for the analysis of non gaussian correlated mimo multiple access channels"):
  with members:
    - "large system analysis of linear precoding in correlated miso broadcast channels under limited feedback"
    - "on the precoder design of flat fading mimo systems equipped with mmse receivers a large system approach"
    - "multi cell mimo downlink with cell cooperation and fair scheduling a large system limit analysis"
    - "asymptotic moments for interference mitigation in correlated fading channels"
    - "a deterministic equivalent for the analysis of correlated mimo multiple access channels"
    - "optimal channel training in uplink network mimo systems"
    - "random matrix model for nakagami hoyt fading"
    - "on the capacity achieving covariance matrix for frequency selective mimo channels using the asymptotic approach"

Connected through hyperedge HE-5 (induced by source paper "applications of stochastic ordering to wireless communications"):
  with members:
    - "error rates of the maximum likelihood detector for arbitrary constellations convex concave behavior and applications"
    - "on certain large random hermitian jacobi matrices with applications to wireless communications"

Connected through hyperedge HE-6 (induced by source paper "on the capacity achieving covariance matrix for frequency selective mimo channels using the asymptotic approach"):
  with members:
    - "a new approach for capacity analysis of large dimensional multi antenna channels"
    - "on the outage capacity of correlated multiple path mimo channels"

Connected through hyperedge HE-7 (induced by source paper "asymptotic mutual information statistics of separately correlated rician fading mimo channels"):
  with members:
    - "a new approach for capacity analysis of large dimensional multi antenna channels"
    - "on the outage capacity of correlated multiple path mimo channels"
    - "randomly spread cdma asymptotics via statistical physics"

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)