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: "a practical cooperative multicell mimo ofdma network based on rank coordination"
  Abstract: An important challenge of wireless networks is to boost the cell edge performance and enable multi-stream transmissions to cell edge users. Interference mitigation techniques relying on multiple antennas and coordination among cells are nowadays heavily studied in the literature. Typical strategies in OFDMA networks include coordinated scheduling, beamforming and power control. In this paper, we propose a novel and practical type of coordination for OFDMA downlink networks relying on multiple antennas at the transmitter and the receiver. The transmission ranks, i.e. the number of transmitted streams, and the user scheduling in all cells are jointly optimized in order to maximize a network utility function accounting for fairness among users. A distributed coordinated scheduler motivated by an interference pricing mechanism and relying on a master-slave architecture is introduced. The proposed scheme is operated based on the user report of a recommended rank for the interfering cells accounting for the receiver interference suppression capability. It incurs a very low feedback and backhaul overhead and enables efficient link adaptation. It is moreover robust to channel measurement errors and applicable to both open-loop and closed-loop MIMO operations. A 20% cell edge performance gain over uncoordinated LTE-A system is shown through system level simulations.

Connected through hyperedge HE-1 (induced by source paper "beyond dirty paper coding for multi antenna broadcast channel with partial csit a rate splitting approach"):
  with members:
    - "cooperative rate splitting for miso broadcast channel with user relaying and performance benefits over cooperative noma"
    - "rate splitting for multi user multi antenna wireless information and power transfer"
    - "dof region of the miso bc with partial csit proof by inductive fourier motzkin elimination"
    - "rate splitting unifying sdma oma noma and multicasting in miso broadcast channel a simple two user rate analysis"
    - "energy efficiency of rate splitting multiple access and performance benefits over sdma and noma"
    - "rate splitting multiple access for coordinated multi point joint transmission"
    - "rate splitting for multi antenna non orthogonal unicast and multicast transmission"
    - "rate splitting multiple access for downlink communication systems bridging generalizing and outperforming sdma and noma"

Connected through hyperedge HE-2 (induced by source paper "degrees of freedom and achievable rate of wide band multi cell multiple access channels with no csit"):
  with members:
    - "interference free ofdm rethinking ofdm for interference networks with inter symbol interference"
    - "spectral efficiency of dynamic coordinated beamforming a stochastic geometry approach"
    - "topological interference management through index coding"
    - "opportunistic interference alignment for mimo interfering multiple access channels"
    - "optimal use of current and outdated channel state information degrees of freedom of the miso bc with mixed csit"
    - "not too delayed csit achieves the optimal degrees of freedom"
    - "a new outer bound via interference localization and the degrees of freedom regions of mimo interference networks with no csit"
    - "spatial degrees of freedom of the multicell mimo multiple access channel"

Connected through hyperedge HE-3 (induced by source paper "rate splitting for mimo wireless networks a promising phy layer strategy for lte evolution"):
  with members:
    - "sum rate maximization for linearly precoded downlink multiuser miso systems with partial csit a rate splitting approach"
    - "miso networks with imperfect csit a topological rate splitting approach"
    - "robust transmission in downlink multiuser miso systems a rate splitting approach"
    - "a rate splitting strategy for massive mimo with imperfect csit"
    - "dof analysis of the mimo broadcast channel with alternating hybrid csit"
    - "rate analysis of two receiver miso broadcast channel with finite rate feedback a rate splitting approach"
    - "degrees of freedom of time correlated miso broadcast channel with delayed csit"

Connected through hyperedge HE-4 (induced by source paper "spectral efficiency of dynamic coordinated beamforming a stochastic geometry approach"):
  with members:
    - "a stochastic geometry framework for analyzing pairwise cooperative cellular networks"
    - "asymptotic deployment gain a simple approach to characterize the sinr distribution in general cellular networks"
    - "coordinated multicast beamforming in multicell networks"
    - "network mimo with linear zero forcing beamforming large system analysis impact of channel estimation and reduced complexity scheduling"
    - "fundamental limits of cooperation"
    - "multi antenna communication in ad hoc networks achieving mimo gains with simo transmission"
    - "a tractable approach to coverage and rate in cellular networks"
    - "on the accuracy of the wyner model in cellular networks"

Connected through hyperedge HE-5 (induced by source paper "joint beamforming design for multi user wireless information and power transfer"):
  with members:
    - "robust beamforming for secure communication in systems with wireless information and power transfer"
    - "joint wireless information and energy transfer with reduced feedback in mimo interference channels"
    - "multiuser miso beamforming for simultaneous wireless information and power transfer"
    - "joint wireless information and energy transfer in a k user mimo interference channel"
    - "wireless information transfer with opportunistic energy harvesting"
    - "wireless information and power transfer architecture design and rate energy tradeoff"
    - "robust beamforming for wireless information and power transmission"
    - "mimo broadcasting for simultaneous wireless information and power transfer"

Connected through hyperedge HE-6 (induced by source paper "a dynamic clustering algorithm for downlink comp systems with multiple antenna ues"):
  with members:
    - "network mimo with linear zero forcing beamforming large system analysis impact of channel estimation and reduced complexity scheduling"
    - "optimized data sharing in multicell mimo with finite backhaul capacity"
    - "networked mimo with clustered linear precoding"

Connected through hyperedge HE-7 (induced by source paper "pushing the limits of lte a survey on research enhancing the standard"):
  with members:
    - "grassmannian differential limited feedback for interference alignment"
    - "modeling and analysis of k tier downlink heterogeneous cellular networks"
    - "mimo interference alignment over correlated channels with imperfect csi"
    - "multiuser mimo achievable rates with downlink training and channel state feedback"
    - "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)