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: "frequency domain min max optimization of noise shaping delta sigma modulators"
  Abstract: This paper proposes a min-max design of noise-shaping delta-sigma modulators. We first characterize the all stabilizing loop-filters for a linearized modulator model. By this characterization, we formulate the design problem of lowpass, bandpass, and multi-band modulators as minimization of the maximum magnitude of the noise transfer function (NTF) in fixed frequency band(s). We show that this optimization minimizes the worst-case reconstruction error, and hence improves the SNR (signal-to-noise ratio) of the modulator. The optimization is reduced to an optimization with a linear matrix inequality (LMI) via the generalized KYP (Kalman-Yakubovich-Popov) lemma. The obtained NTF is an FIR (finite-impulse-response) filter, which is favorable in view of implementation. We also derive a stability condition for the nonlinear model of delta-sigma modulators with general quantizers including uniform ones. This condition is described as an norm condition, which is reduced to an LMI via the KYP lemma. Design examples show advantages of our design.

Connected through hyperedge HE-1 (induced by source paper "min max design of feedback quantizers for netorwked control systems"):
  with members:
    - "noise weighting in the design of delta sigma modulators with a psychoacoustic coder as an example"

Connected through hyperedge HE-2 (induced by source paper "mean squared error analysis of quantizers with error feedback"):
  with members:
    - "output filter aware optimization of the noise shaping properties of δσ modulators via semi definite programming"

Connected through hyperedge HE-3 (induced by source paper "fir digital filter design by sampled data h infinity discretization"):
  with members:
    - "min max design of fir digital filters by semidefinite programming"
    - "signal reconstruction via h infty sampled data control theory beyond the shannon paradigm"

Connected through hyperedge HE-4 (induced by source paper "noise weighting in the design of delta sigma modulators with a psychoacoustic coder as an example"):
  with members:
    - "output filter aware optimization of the noise shaping properties of δσ modulators via semi definite programming"
    - "should δσ modulators used in ac motor drives be adapted to the mechanical load of the motor"

Connected through hyperedge HE-5 (induced by source paper "output filter aware optimization of the noise shaping properties of δσ modulators via semi definite programming"):
  with members:
    - "should δσ modulators used in ac motor drives be adapted to the mechanical load of the motor"

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)