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: "soft output demodulation on frequency selective rayleigh fading channels using ar channel models"
  Abstract: Optimal link adaption to the scattering function of wide-sense stationary uncorrelated scattering (WSSUS) mobile communication channels is still an unsolved problem despite its importance for next-generation system design. In multicarrier transmission, such link adaption is performed by pulse shaping, i.e., by properly adjusting the transmit and receive filters. For example, pulse-shaped offset-quadrature amplitude modulation (OQAM) systems have recently been shown to have superior performance over standard cyclic prefix orthogonal frequency-division multiplexing (OFDM) (while operating at higher spectral efficiency). In this paper, we establish a general mathematical framework for joint transmitter and receiver pulse shape optimization for so-called Weyl-Heisenberg or Gabor signaling with respect to the scattering function of the WSSUS channel. In our framework, the pulse shape optimization problem is translated to an optimization problem over trace class operators which, in turn, is related to fidelity optimization in quantum information processing. By convexity relaxation, the problem is shown to be equivalent to a convex constraint quasi-convex maximization problem thereby revealing the nonconvex nature of the overall WSSUS pulse design problem. We present several iterative algorithms for optimization providing applicable results even for large-scale problem constellations. We show that with transmitter-side knowledge of the channel statistics a gain of 3-6 dB in signal-to-interference-and-noise-ratio (SINR) can be expected.

Connected through hyperedge HE-1 (induced by source paper "pulse shaping design for ofdm systems"):
  with members:
    - "filtered ofdm enabler for flexible waveform in the 5th generation cellular networks"

Connected through hyperedge HE-2 (induced by source paper "pulse shaped ofdm for 5g systems"):
  with members:
    - "filtered ofdm enabler for flexible waveform in the 5th generation cellular networks"

Connected through hyperedge HE-3 (induced by source paper "max sinr receiver for hmct systems over non stationary doubly dispersive channel"):
  with members:
    - "time and frequency synchronization for multicarrier transmission on hexagonal time frequency lattice"
    - "on max sinr receivers for hmt systems over a doubly dispersive channel"
    - "on max sinr receiver for hexagonal multicarrier transmission over doubly dispersive channel"

Connected through hyperedge HE-4 (induced by source paper "time and frequency synchronization for multicarrier transmission on hexagonal time frequency lattice"):
  with members:
    - "on max sinr receivers for hmt systems over a doubly dispersive channel"
    - "on max sinr receiver for hexagonal multicarrier transmission over doubly dispersive channel"

Connected through hyperedge HE-5 (induced by source paper "on max sinr receivers for hmt systems over a doubly dispersive channel"):
  with members:
    - "on max sinr receiver for hexagonal multicarrier transmission over doubly dispersive channel"

Connected through hyperedge HE-6 (induced by source paper "a survey on multicarrier communications prototype filters lattice structures and implementation aspects"):
  with members:
    - "time frequency foundations of communications"
    - "a new model for interference analysis in asynchronous multi carrier transmission"

Connected through hyperedge HE-7 (induced by source paper "pulse shaping localization and the approximate eigenstructure of ltv channels special paper"):
  with members:
    - "on the approximate eigenstructure of time varying channels"
    - "weighted norms of ambiguity functions and wigner distributions"
    - "on time variant distortions in multicarrier transmission with application to frequency offsets and phase noise"

Connected through hyperedge HE-8 (induced by source paper "on the approximate eigenstructure of time varying channels"):
  with members:
    - "approximate eigenstructure of ltv channels with compactly supported spreading"
    - "a group theoretic approach to the wssus pulse design problem"

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)