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 feasibility of interference alignment for reverse tdd systems in mimo cellular networks"):
  Abstract: The feasibility conditions of interference alignment (IA) are analyzed for reverse TDD systems, i.e., one cell operates as downlink (DL) but the other cell operates as uplink (UL). Under general multiple-input and multiple-output (MIMO) antenna configurations, a necessary condition and a sufficient condition for one-shot linear IA are established, i.e., linear IA without symbol or time extension. In several example networks, optimal sum degrees of freedom (DoF) is characterized by the derived necessary condition and sufficient condition. For symmetric DoF within each cell, a sufficient condition is established in a more compact expression, which yields the necessary and sufficient condition for a class of symmetric DoF. An iterative construction of transmit and received beamforming vectors is further proposed, which provides a specific beamforming design satisfying one-shot IA. Simulation results demonstrate that the proposed IA not only achieve lager DoF but also significantly improve the sum rate in the practical signal-to-noise ratio (SNR) regime.

Includes members:
  Member "feasibility of interference alignment for the mimo interference channel":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "the interference channel revisited aligning interference by adjusting receive antenna separation")
  Member "degrees of freedom of uplink downlink multiantenna cellular networks":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "linear degrees of freedom of mimo broadcast channels with reconfigurable antennas in the absence of csit")
  Member "cellular interference alignment":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "degrees of freedom of cache aided wireless cellular networks")
  Member "the feasibility conditions for interference alignment in mimo networks":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "topological interference management with user admission control via riemannian optimization")
  Member "on the degrees of freedom of asymmetric mimo interference broadcast channels":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "hybrid channel pre inversion and interference alignment strategies")
  Member "hetnets and massive mimo modeling potential gains and performance analysis":
    also connected through other hyperedges:
      - Hyperedge HE-6 (induced by source paper "user centric interference nulling in downlink multi antenna heterogeneous networks")
  Member "on the feasibility of linear interference alignment for mimo interference broadcast channels with constant coefficients":
    also connected through other hyperedges:
      - Hyperedge HE-7 (induced by source paper "role of interference alignment in wireless cellular network optimization")
  Member "regularized zero forcing interference alignment for the two cell mimo interfering broadcast channel":
    also connected through other hyperedges:
      - Hyperedge HE-8 (induced by source paper "degrees of freedom of uplink downlink multiantenna cellular networks")

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)