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 "the papr problem in ofdm transmission new directions for a long lasting problem"):
  Abstract: Energy efficiency matters in future mobile communications networks. The key driving factor is the growing energy cost of network operations that can make up as much as 50% of the total operational cost today [1]. In the context of green information and communication technology (ICT), this has led to many global initiatives such as the Green Touch consortium.

Includes members:
  Member "peak reduction and clipping mitigation in ofdm by augmented compressive sensing":
    also connected through other hyperedges:
      (none)
  Member "expected supremum of a random linear combination of shifted kernels":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "on the peak to average power ratio reduction problem for orthogonal transmission schemes")
  Member "on the peak to average power ratio reduction problem for orthogonal transmission schemes":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "capacity and degree of freedom of ofdm channels with amplitude constraint")
  Member "analysis of alternative metrics for the papr problem in ofdm transmission":
    also connected through other hyperedges:
      (none)
  Member "on the concentration of the crest factor for ofdm signals":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "multicarrier papr reduction by iteratively shifting and concentrating the probability measure")
  Member "clipping noise cancellation for ofdm and ofdma systems using compressed sensing":
    also connected through other hyperedges:
      (none)
  Member "subspace pursuit for compressive sensing signal reconstruction":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "compressive sensing for cut improvement and local clustering")
  Member "on cosets of the generalized first order reed muller code with low pmepr":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "low pmepr preamble sequence design for dynamic spectrum allocation in ofdma systems")

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)