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 "on interference alignment with imperfect csi characterizations of outage probability ergodic rate and ser"):
  Abstract: In this paper, the autors give a unified performance analysis of interference alignment (IA) over multiple-input–multiple-output (MIMO) interference channels. Rather than the asymptotic characterization, i.e., degree of freedom (DOF) at high signal-to-noise ratio (SNR), the authors focus on the other practical performance metrics, namely, outage probability, ergodic rate, and symbol error rate (SER). In particular, the authors consider imperfect IA because the transmitters usually have only imperfect channel state information (CSI) in a practical scenario. By characterizing the impact of imperfect CSI, the authors derive the exact closed-form expressions of outage probability, ergodic rate, and SER in terms of CSI accuracy, transmit SNR, channel condition, number of antennas, and the number of data streams of each communication pair. Furthermore, the authors obtain some important guidelines for performance optimization of IA under imperfect CSI by minimizing the performance loss over IA with perfect CSI. Finally, the authors theoretical claims are validated by simulation results.

Includes members:
  Member "performance analysis and optimization for interference alignment over mimo interference channels with limited feedback":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "provisioning energy efficiency and qos for multi carrier comp with limited feedback")
  Member "the feasibility conditions for interference alignment in mimo networks":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "topological interference management with user admission control via riemannian optimization")
  Member "on the achievable dof and user scaling law of opportunistic interference alignment in 3 transmitter mimo interference channels":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "opportunistic downlink interference alignment for multi cell mimo networks")
  Member "interference aware resource control in multi antenna cognitive ad hoc networks with heterogeneous delay constraints":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "performance analysis and optimization for interference alignment over mimo interference channels with limited feedback")
  Member "performance analysis for physical layer security in multi antenna downlink networks with limited csi feedback":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "secrecy analysis of random mimo wireless networks over alpha mu fading channels")
  Member "limited feedback design for interference alignment on mimo interference networks with heterogeneous path loss and spatial correlations":
    also connected through other hyperedges:
      - Hyperedge HE-6 (induced by source paper "an overview on resource allocation techniques for multi user mimo systems")
  Member "opportunistic interference alignment for mimo interfering multiple access channels":
    also connected through other hyperedges:
      - Hyperedge HE-7 (induced by source paper "multi stream opportunistic network decoupling relay selection and interference management")
  Member "on the degrees of freedom achievable through interference alignment in a mimo interference channel":
    also connected through other hyperedges:
      - Hyperedge HE-8 (induced by source paper "centralized and decentralized cache aided interference management in heterogeneous parallel channels")

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)