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 "64 apsk constellation and mapping optimization for satellite broadcasting using genetic algorithms"):
  Abstract: DVB-S2 and DVB-SH satellite broadcasting standards currently deploy 16- and 32-amplitude phase shift keying (APSK) modulation using the consultative committee for space data systems (CCSDS) mapping. Such standards also include hierarchical modulation as a mean to provide unequal error protection in highly variable channels over satellite. Foreseeing the increasing need for higher data rates, this paper tackles the optimization of 64-APSK constellations to minimize the mean square error between the original and received symbol. Optimization is performed according to the sensitivity of the data to the channel errors, by means of genetic algorithms, a well-known technique currently used in a variety of application domains, when close form solutions are impractical. Test results show that through non-uniform constellation and asymmetric symbol mapping, it is possible to significantly reduce the distortion while preserving bandwidth efficiency. Tests performed on real signals based on perceptual quality measurements allow validating the proposed scheme against conventional 64-APSK constellations and CCSDS mapping.

Includes members:
  Member "on the genetic optimization of apsk constellations for satellite broadcasting":
    also connected through other hyperedges:
      (none)
  Member "random access in dvb rcs2 design and dynamic control for congestion avoidance":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "interference calculation in asynchronous random access protocols using diversity")
  Member "a hierarchical modulation for upgrading digital broadcast systems":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "digital domain power division multiplexed dual polarization coherent optical ofdm transmission")
  Member "constellation design for transmission over nonlinear satellite channels":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "code design for non coherent detection of frame headers in precoded satellite systems")
  Member "combining adaptive coding and modulation with hierarchical modulation in satcom systems":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "on optimizing hierarchical modulation in awgn channel")
  Member "providing local content in a hybrid single frequency network using hierarchical modulation":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "dvb s2 spectrum efficiency improvement with hierarchical modulation")

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)