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 "close form design of antenna constrained multi cell multi user downlink interference alignment"):
  Abstract: This paper investigates the downlink channels in multi-cell multi-user interfering networks. The goal is to propose close-form designs to obtain degrees of freedom (DoF) in high SNR region for the network composed of base stations (BS) as transmitters and mobile stations (MS) as receivers. Consider the realistic system, both BS and MS have finite antennas, so that the design of interference alignment is highly constrained by the feasibility conditions. The focus of design is to explore potential opportunities of alignment in the subspace both from the BS transmit side and from the MS receive side. The new IA schemes for cellular downlink channels are in the form of causal dynamic processes in contrary to conventional static IA schemes. For different implementations, system conditions are compared from all aspects, which include antenna usage, CSI overhead and computational complexity. This research scope covers a wide range of typical multi-cell multi-user network models. The first one is a $K$-cell fully connected cellular network; the second one is a Wyner cyclic cellular network with two adjacent interfering links; the third one is a Wyner cyclic cellular network with single adjacent interfering link considering cell-edge and cell-interior users respectively.

Includes members:
  Member "on the symmetric feedback capacity of the k user cyclic interference channel":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "an outer bound for the memoryless two user interference channel with general cooperation")
  Member "on the sum capacity of k user cascade gaussian z interference channel":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "channel conditions for the optimality of interference decoding schemes for k user gaussian interference channels")
  Member "downlink interference alignment":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "optimality of treating inter cell interference as noise under finite precision csit")
  Member "on the capacity of the k user cyclic gaussian interference channel":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "on the optimality of treating inter cell interference as noise in uplink cellular networks")
  Member "interference alignment under limited feedback for mimo interference channels":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "opportunistic downlink interference alignment for multi cell mimo networks")
  Member "approaching the capacity of wireless networks through distributed interference alignment":
    also connected through other hyperedges:
      - Hyperedge HE-6 (induced by source paper "fundamental limits of dynamic interference management with flexible message assignments")
  Member "multiuser mimo achievable rates with downlink training and channel state feedback":
    also connected through other hyperedges:
      - Hyperedge HE-7 (induced by source paper "beyond dirty paper coding for multi antenna broadcast channel with partial csit a rate splitting 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)