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: "interference alignment with quantized grassmannian feedback in the k user constant mimo interference channel"
  Abstract: A simple channel state information (CSI) feedback scheme is proposed for interference alignment (IA) over the K-user constant Multiple-Input-Multiple-Output Interference Channel (MIMO IC). The proposed technique relies on the identification of invariants in the IA equations, which enables the reformulation of the CSI quantization problem as a single quantization on the Grassmann manifold at each receiver. The scaling of the number of feedback bits with the transmit power sufficient to preserve the multiplexing gain that can be achieved under perfect CSI is established. We show that the CSI feedback requirements of the proposed technique are better (lower) than what is required when using previously published methods, for system dimensions (number of users and antennas) of practical interest. Furthermore, we show through simulations that this advantage persists at low SNR, in the sense that the proposed technique yields a higher sum-rate performance for a given number of feedback bits. Finally, to complement our analysis, we introduce a statistical model that faithfully captures the properties of the quantization error obtained for random vector quantization (RVQ) on the Grassmann manifold for large codebooks; this enables the numerical (Monte-Carlo) analysis of general Grassmannian RVQ schemes for codebook sizes that would be impractically large to simulate.

Connected through hyperedge HE-1 (induced by source paper "on channel state feedback model and overhead in theoretical and practical views"):
  with members:
    - "study on a low complexity ecg compression scheme with multiple sensors"
    - "joint relay and jammer selection improves the physical layer security in the face of csi feedback delays"
    - "a differential feedback scheme exploiting the temporal and spectral correlation"
    - "on the minimum differential feedback for time correlated mimo rayleigh block fading channels"

Connected through hyperedge HE-2 (induced by source paper "on the degrees of freedom for opportunistic interference alignment with 1 bit feedback the 3 cell case"):
  with members:
    - "on the achievable dof and user scaling law of opportunistic interference alignment in 3 transmitter mimo interference channels"
    - "opportunistic interference alignment for mimo interfering multiple access channels"
    - "multiuser diversity in interfering broadcast channels achievable degrees of freedom and user scaling law"
    - "opportunistic interference mitigation achieves optimal degrees of freedom in wireless multi cell uplink networks"
    - "interference alignment with analog channel state feedback"
    - "quantization bounds on grassmann manifolds and applications to mimo communications"

Connected through hyperedge HE-3 (induced by source paper "on the achievable dof of opportunistic interference alignment with 1 bit feedback"):
  with members:
    - "on the achievable dof and user scaling law of opportunistic interference alignment in 3 transmitter mimo interference channels"
    - "opportunistic interference alignment for mimo interfering multiple access channels"
    - "multiuser diversity in interfering broadcast channels achievable degrees of freedom and user scaling law"
    - "opportunistic interference mitigation achieves optimal degrees of freedom in wireless multi cell uplink networks"
    - "interference alignment with analog channel state feedback"
    - "quantization bounds on grassmann manifolds and applications to mimo communications"

Connected through hyperedge HE-4 (induced by source paper "grouping based interference alignment with ia cell assignment in multi cell mimo mac under limited feedback"):
  with members:
    - "user selection in mimo interfering broadcast channels"
    - "what will 5g be"
    - "limited feedback design for interference alignment on mimo interference networks with heterogeneous path loss and spatial correlations"
    - "low complexity sum rate maximization for single and multiple stream mimo af relay networks"
    - "spatial degrees of freedom of the multicell mimo multiple access channel"
    - "on feasibility of interference alignment in mimo interference networks"
    - "downlink interference alignment"
    - "interference alignment under limited feedback for mimo interference channels"

Connected through hyperedge HE-5 (induced by source paper "secure mimo communications under quantized channel feedback in the presence of jamming"):
  with members:
    - "on the design of artificial noise aided secure multi antenna transmission in slow fading channels"
    - "robust beamforming for security in mimo wiretap channels with imperfect csi"
    - "secrecy degrees of freedom of mimo broadcast channels with delayed csit"
    - "secure transmission with artificial noise over fading channels achievable rate and optimal power allocation"
    - "interference alignment under limited feedback for mimo interference channels"
    - "the secrecy capacity of the mimo wiretap channel"
    - "mimo broadcast channels with finite rate feedback"
    - "quantization bounds on grassmann manifolds and applications to mimo communications"

Connected through hyperedge HE-6 (induced by source paper "csi feedback reduction for mimo interference alignment"):
  with members:
    - "the feasibility conditions for interference alignment in mimo networks"
    - "csit sharing over finite capacity backhaul for spatial interference alignment"
    - "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"
    - "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-7 (induced by source paper "degrees of freedom of certain interference alignment schemes with distributed csit"):
  with members:
    - "csit sharing over finite capacity backhaul for spatial interference alignment"
    - "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-8 (induced by source paper "csit sharing over finite capacity backhaul for spatial interference alignment"):
  with members:
    - "on feasibility of interference alignment in mimo interference networks"
    - "interference alignment under limited feedback for mimo interference channels"
    - "interference alignment with limited feedback"
    - "on feasibility of interference alignment in mimo interference networks"
    - "capacity of a multiple antenna fading channel with a quantized precoding matrix"
    - "degrees of freedom of the k user m times n mimo interference channel"
    - "mimo broadcast channels with finite rate 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)