human: Given a hyperedge-centered hypergraph: <hypergraph>, where the center hyperedge is induced by one source paper and its member nodes are the cited papers.

Details of the hypergraph:
Center hyperedge (induced by source paper "optimal constellations for the low snr noncoherent mimo block rayleigh fading channel"):
  Abstract: Reliable communication over the discrete-input/continuous-output noncoherent multiple-input multiple-output (MIMO) Rayleigh block fading channel is considered when the signal-to-noise ratio (SNR) per degree of freedom is low. Two key problems are posed and solved to obtain the optimum discrete input. In both problems, the average and peak power per space-time slot of the input constellation are constrained. In the first one, the peak power to average power ratio (PPAPR) of the input constellation is held fixed, while in the second problem, the peak power is fixed independently of the average power. In the first PPAPR-constrained problem, the mutual information, which grows as O(SNR^2), is maximized up to second order in SNR. In the second peak-constrained problem, where the mutual information behaves as O(SNR), the structure of constellations that are optimal up to first order, or equivalently, that minimize energy/bit, are explicitly characterized. Furthermore, among constellations that are first-order optimal, those that maximize the mutual information up to second order, or equivalently, the wideband slope, are characterized. In both PPAPR-constrained and peak-constrained problems, the optimal constellations are obtained in closed-form as solutions to non-convex optimizations, and interestingly, they are found to be identical. Due to its special structure, the common solution is referred to as Space Time Orthogonal Rank one Modulation, or STORM. In both problems, it is seen that STORM provides a sharp characterization of the behavior of noncoherent MIMO capacity.

Includes members:
  Member "low snr capacity of fading channels mimo and delay spread":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "low snr capacity of noncoherent fading channels")
  Member "non coherent capacity and reliability of sparse multipath channels in the wideband regime":
    also connected through other hyperedges:
      (none)
  Member "capacity of sparse multipath channels in the ultra wideband regime":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "capacity scaling in a non coherent wideband massive simo block fading channel")
  Member "low snr capacity of fading channels with peak and average power constraints":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "on capacity and capacity per unit cost of gaussian multiple access channel with peak power constraints")
  Member "the noncoherent rician fading channel part i structure of the capacity achieving input":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "a simple capacity lower bound for communication with superimposed pilots")
  Member "noncoherent rician fading channel part ii spectral efficiency in the low power regime":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "on the miso channel with feedback can infinitely massive antennas achieve infinite capacity")
  Member "capacity per unit energy of fading channels with a peak constraint":
    also connected through other hyperedges:
      - Hyperedge HE-6 (induced by source paper "unified capacity limit of non coherent wideband fading channels")

Question: Please tell me which class the source paper 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)