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: "locally diverse constellations from the special orthogonal group"
  Abstract: To optimize rotated, multidimensional constellations over a single-input, single-output Rayleigh fading channel, a family of rotation matrices is constructed for all dimensions which are a power of 2. This family is a one-parameter subgroup of the group of rotation matrices, and is located using a gradient descent scheme on this Lie group. The parameter defining the family is chosen to optimize the cutoff rate of the constellation. The optimal rotation parameter is computed explicitly for low signal-to-noise ratios. #R##N#These rotations outperform full-diversity algebraic rotations in terms of cutoff rate at low SNR (signal-to-noise ratio) and bit error rate at high SNR in dimension $n = 4$. However, a QAM (quadrature amplitude modulation) constellation rotated by such a matrix lacks full diversity, in contrast with the conventional wisdom that good signal sets exhibit full diversity. A new notion of diversity, referred to as local diversity, is introduced to attempt to account for this behavior. Roughly, a locally fully diverse constellation is fully diverse only in small neighborhoods. A local variant of the minimum product distance is also introduced and is shown experimentally to be a superior predictor of constellation performance than the minimum product distance in dimension $n = 4$.

Connected through hyperedge HE-1 (induced by source paper "lattice coding for rician fading channels from hadamard rotations"):
  with members:
    - "mimo channel modeling and capacity analysis for 5g millimeter wave wireless systems"

Connected through hyperedge HE-2 (induced by source paper "on analytical and geometric lattice design criteria for wiretap coset codes"):
  with members:
    - "performance of lattice coset codes on a usrp testbed"
    - "well rounded lattices for reliability and security in rayleigh fading siso channels"
    - "decoding in compute and forward relaying real lattices and the flatness of lattice sums"
    - "almost universal codes for fading wiretap channels"
    - "construction a of lattices over number fields and block fading wiretap coding"
    - "probability estimates for fading and wiretap channels from ideal class zeta functions"
    - "semantically secure lattice codes for the gaussian wiretap channel"
    - "inverse determinant sums and connections between fading channel information theory and algebra"

Connected through hyperedge HE-3 (induced by source paper "well rounded lattices for reliability and security in rayleigh fading siso channels"):
  with members:
    - "information bounds and flatness factor approximation for fading wiretap mimo channels"
    - "almost universal codes for fading wiretap channels"
    - "probability estimates for fading and wiretap channels from ideal class zeta functions"
    - "a comparison of skewed and orthogonal lattices in gaussian wiretap channels"
    - "semantically secure lattice codes for the gaussian wiretap channel"
    - "integer space time block codes for practical mimo systems"
    - "inverse determinant sums and connections between fading channel information theory and algebra"
    - "lattice code design for the rayleigh fading wiretap 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)