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 "a survey on non orthogonal multiple access for 5g networks research challenges and future trends"):
  Abstract: Non-orthogonal multiple access (NOMA) is an essential enabling technology for the fifth generation (5G) wireless networks to meet the heterogeneous demands on low latency, high reliability, massive connectivity, improved fairness, and high throughput. The key idea behind NOMA is to serve multiple users in the same resource block, such as a time slot, subcarrier, or spreading code. The NOMA principle is a general framework, and several recently proposed 5G multiple access schemes can be viewed as special cases. This survey provides an overview of the latest NOMA research and innovations as well as their applications. Thereby, the papers published in this special issue are put into the content of the existing literature. Future research challenges regarding NOMA in 5G and beyond are also discussed.

Includes members:
  Member "exploiting multiple antenna techniques for non orthogonal multiple access":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "what role can noma play in massive mimo")
  Member "achievable rate region of non orthogonal multiple access systems with wireless powered decoder":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "nonorthogonal multiple access for beamforming in energy harvesting enabled networks")
  Member "a new view of multi user hybrid massive mimo non orthogonal angle division multiple access":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "beam squint and channel estimation for wideband mmwave massive mimo ofdm systems")
  Member "on non orthogonal multiple access with finite alphabet inputs in z channels":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "lattice coding for downlink multiuser transmission")
  Member "spectrum and energy efficient beamspace mimo noma for millimeter wave communications using lens antenna array":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "intelligent reflecting and transmitting surface aided millimeter wave massive mimo")
  Member "practical power balanced non orthogonal multiple access":
    also connected through other hyperedges:
      - Hyperedge HE-6 (induced by source paper "coherent detection for short packet physical layer network coding with fsk modulation")
  Member "noma based random access with multichannel aloha":
    also connected through other hyperedges:
      - Hyperedge HE-7 (induced by source paper "constrained deep reinforcement learning for energy sustainable multi uav based random access iot networks with noma")
  Member "optimal power allocation scheme for non orthogonal multiple access with alpha fairness":
    also connected through other hyperedges:
      - Hyperedge HE-8 (induced by source paper "on the performance of network noma in uplink comp systems a stochastic geometry approach")

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)