human: Given a node-centered hypergraph: <hypergraph>, where nodes represent papers and hyperedges represent sets of papers co-cited by a source paper.

Details of the hypergraph:
Center node: "csit sharing over finite capacity backhaul for spatial interference alignment"
  Abstract: Cellular systems that employ time division duplexing (TDD) transmission are good candidates for implementation of interference alignment (IA) in the downlink since channel reciprocity enables the estimation of the channel state by the base stations (BS) in the uplink phase. However, the interfering BSs need to share their channel estimates via backhaul links of finite capacity. A quantization scheme is proposed which reduces the amount of information exchange (compared to conventional methods) required to achieve IA in a TDD system. The scaling (with the transmit power) of the number of bits to be exchanged between the BSs that is sufficient to preserve the multiplexing gain of IA is derived.

Connected through hyperedge HE-1 (induced by source paper "cooperative channel estimation for coordinated transmission with limited backhaul"):
  with members:
    - "large system analysis of linear precoding in correlated miso broadcast channels under limited feedback"
    - "robust monotonic optimization framework for multicell miso systems"
    - "uplink comp under a constrained backhaul and imperfect channel knowledge"
    - "k means has polynomial smoothed complexity"
    - "adaptive limited feedback for sum rate maximizing beamforming in cooperative multicell systems"
    - "distributed compression for the uplink of a backhaul constrained coordinated cellular network"

Connected through hyperedge HE-2 (induced by source paper "on the benefits of edge caching for mimo interference alignment"):
  with members:
    - "optimal geographic caching in cellular networks"
    - "hierarchical coded caching"
    - "performance analysis and optimization for interference alignment over mimo interference channels with limited feedback"
    - "device to device data storage with regenerating codes"
    - "what will 5g be"
    - "living on the edge the role of proactive caching in 5g wireless networks"
    - "cache enabled opportunistic cooperative mimo for video streaming in wireless systems"
    - "many to many matching games for proactive social caching in wireless small cell networks"

Connected through hyperedge HE-3 (induced by source paper "queueing stability and csi probing of a tdd wireless network with interference alignment"):
  with members:
    - "performance analysis and optimization for interference alignment over mimo interference channels with limited feedback"
    - "performance evaluation of multiterminal backhaul compression for cloud radio access networks"
    - "on feasibility of interference alignment in mimo interference networks"
    - "interference alignment with analog channel state feedback"
    - "interference alignment under limited feedback for mimo interference channels"
    - "interference alignment with limited feedback"
    - "stability and delay of zero forcing sdma with limited feedback"
    - "on feasibility of interference alignment in mimo interference networks"

Connected through hyperedge HE-4 (induced by source paper "csi feedback reduction for mimo interference alignment"):
  with members:
    - "the feasibility conditions for interference alignment in mimo networks"
    - "limited feedback design for interference alignment on mimo interference networks with heterogeneous path loss and spatial correlations"
    - "on the degrees of freedom achievable through interference alignment in a mimo interference channel"
    - "interference alignment with quantized grassmannian feedback in the k user constant mimo interference channel"
    - "grassmannian differential limited feedback for interference alignment"
    - "interference alignment with incomplete csit sharing"
    - "feedback topology designs for interference alignment in mimo interference channels"
    - "mimo interference alignment over correlated channels with imperfect csi"

Connected through hyperedge HE-5 (induced by source paper "degrees of freedom of certain interference alignment schemes with distributed csit"):
  with members:
    - "interference alignment with quantized grassmannian feedback in the k user constant mimo interference channel"
    - "sum capacity of interference channels with a local view impact of distributed decisions"
    - "interference alignment with incomplete csit sharing"
    - "on achieving local view capacity via maximal independent graph scheduling"
    - "geometry of the 3 user mimo interference channel"
    - "on the capacity of memoryless finite state multiple access channels with asymmetric state information at the encoders"
    - "cooperative algorithms for mimo interference channels"
    - "downlink interference alignment"

Connected through hyperedge HE-6 (induced by source paper "interference alignment with quantized grassmannian feedback in the k user constant mimo interference channel"):
  with members:
    - "on the degrees of freedom achievable through interference alignment in a mimo interference channel"
    - "adaptive interference alignment with csi uncertainty"
    - "settling the feasibility of interference alignment for the mimo interference channel the symmetric square case"
    - "on feasibility of interference alignment in mimo interference networks"
    - "downlink interference alignment"
    - "interference alignment with analog channel state feedback"
    - "interference alignment under limited feedback for mimo interference channels"
    - "interference alignment with limited feedback"

Question: Please tell me which class the center node 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)