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 "vandermonde subspace frequency division multiplexing for two tiered cognitive radio networks"):
  Abstract: Vandermonde-subspace frequency division multiplexing (VFDM) is an overlay spectrum sharing technique for cognitive radio. VFDM makes use of a precoder based on a Vandermonde structure to transmit information over a secondary system, while keeping an orthogonal frequency division multiplexing (OFDM)-based primary system interference-free. To do so, VFDM exploits frequency selectivity and the use of cyclic prefixes by the primary system. Herein, a global view of VFDM is presented, including also practical aspects such as linear receivers and the impact of channel estimation. We show that VFDM provides a spectral efficiency increase of up to 1 bps/Hz over cognitive radio systems based on unused band detection. We also present some key design parameters for its future implementation and a feasible channel estimation protocol. Finally we show that, even when some of the theoretical assumptions are relaxed, VFDM provides non-negligible rates while protecting the primary system.

Includes members:
  Member "from spectrum pooling to space pooling opportunistic interference alignment in mimo cognitive networks":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "contextual bandit learning for machine type communications in the null space of multi antenna systems")
  Member "power control in two tier femtocell networks":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "game theory based joint task offloading and resources allocation algorithm for mobile edge computing")
  Member "secured communication over frequency selective fading channels a practical vandermonde precoding":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "securing ofdm based wireless links using temporal artificial noise injection")
  Member "mimo broadcast channel optimization under general linear constraints":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "dual link algorithm for the weighted sum rate maximization in mimo interference channels")
  Member "vandermonde frequency division multiplexing for cognitive radio":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "cognitive orthogonal precoder for two tiered networks deployment")
  Member "femtocell networks a survey":
    also connected through other hyperedges:
      - Hyperedge HE-6 (induced by source paper "robust resource allocation for pd noma based miso heterogeneous networks with comp technology")

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)