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: "adaptive coding and modulation for large scale antenna array based aeronautical communications in the presence of co channel interference"
  Abstract: In order to meet the demands of `Internet above the clouds', we propose a multiple-antenna aided adaptive coding and modulation (ACM) for aeronautical communications. The proposed ACM scheme switches its coding and modulation mode according to the distance between the communicating aircraft, which is readily available with the aid of the airborne radar or the global positioning system. We derive an asymptotic closed-form expression of the signal-to-interference-plus-noise ratio (SINR) as the number of transmitting antennas tends to infinity, in the presence of realistic co-channel interference and channel estimation errors. The achievable transmission rates and the corresponding mode-switching distance-thresholds are readily obtained based on this closed-form SINR formula. Monte-Carlo simulation results are used to validate our theoretical analysis. For the specific example of 32 transmit antennas and 4 receive antennas communicating at a 5 GHz carrier frequency and using 6 MHz bandwidth, which are reused by multiple other pairs of communicating aircraft, the proposed distance-based ACM is capable of providing as high as 65.928 Mbps data rate when the communication distance is less than 25\,km.

Connected through hyperedge HE-1 (induced by source paper "secure millimeter wave cloud radio access networks relying on microwave multicast fronthaul"):
  with members:
    - "hybrid precoding based millimeter wave massive mimo noma with simultaneous wireless information and power transfer"
    - "optimized base station cache allocation for cloud radio access network with multicast backhaul"
    - "safeguarding millimeter wave communications against randomly located eavesdroppers"
    - "energy efficient power allocation in millimeter wave massive mimo with non orthogonal multiple access"
    - "robust an aided beamforming and power splitting design for secure miso cognitive radio with swipt"
    - "energy efficient joint congestion control and resource optimization in heterogeneous cloud radio access networks"
    - "content centric sparse multicast beamforming for cache enabled cloud ran"
    - "secure communications in millimeter wave ad hoc networks"

Connected through hyperedge HE-2 (induced by source paper "aeronautical ad hoc networking for the internet above the clouds"):
  with members:
    - "optimizing space air ground integrated networks by artificial intelligence"
    - "regularized zero forcing precoding aided adaptive coding and modulation for large scale antenna array based air to air communications"
    - "a survey of multi objective optimization in wireless sensor networks metrics algorithms and open problems"
    - "optical communication in space challenges and mitigation techniques"
    - "survey of important issues in uav communication networks"
    - "on the security of the automatic dependent surveillance broadcast protocol"
    - "security challenges in mobile ad hoc networks a survey"
    - "massive mimo for next generation wireless systems"

Connected through hyperedge HE-3 (induced by source paper "boosting fronthaul capacity global optimization of power sharing for centralized radio access network"):
  with members:
    - "differential evolution algorithm aided turbo channel estimation and multi user detection for g fast systems in the presence of fext"
    - "regularized zero forcing precoding aided adaptive coding and modulation for large scale antenna array based air to air communications"
    - "joint precoding and rrh selection for user centric green mimo c ran"
    - "joint user selection and energy minimization for ultra dense multi channel c ran with incomplete csi"
    - "overview of millimeter wave communications for fifth generation 5g wireless networks with a focus on propagation models"
    - "multivariate fronthaul quantization for downlink c ran"
    - "fronthauling for 5g lte u ultra dense cloud small cell networks"
    - "cluster content caching an energy efficient approach to improve quality of service in cloud radio access networks"

Connected through hyperedge HE-4 (induced by source paper "regularized zero forcing precoding aided adaptive coding and modulation for large scale antenna array based air to air communications"):
  with members:
    - "impact of line of sight and unequal spatial correlation on uplink mu mimo systems"
    - "asymptotic analysis of multicell massive mimo over rician fading channels"
    - "antenna grouping based feedback compression for fdd based massive mimo systems"
    - "massive mimo for next generation wireless systems"
    - "large system analysis of cooperative multi cell downlink transmission via regularized channel inversion with imperfect csit"

Connected through hyperedge HE-5 (induced by source paper "generalised precoded spatial modulation for integrated wireless information and power transfer"):
  with members:
    - "localisation communication and networking with vlc challenges and opportunities"
    - "synthesis and optimization of reversible circuits a survey"
    - "interactive joint transfer of energy and information"
    - "wireless information and power transfer a dynamic power splitting approach"
    - "wireless information transfer with opportunistic energy harvesting"
    - "large system analysis of linear precoding in correlated miso broadcast channels under limited feedback"
    - "on the transfer of information and energy in multi user systems"
    - "robust beamforming for wireless information and power transmission"

Connected through hyperedge HE-6 (induced by source paper "localisation communication and networking with vlc challenges and opportunities"):
  with members:
    - "impact of multipath reflections on the performance of indoor visible light positioning systems"
    - "non orthogonal multiple access for visible light communications"
    - "flip ofdm for unipolar communication systems"

Connected through hyperedge HE-7 (induced by source paper "physical layer security of generalised pre coded spatial modulation with antenna scrambling"):
  with members:
    - "localisation communication and networking with vlc challenges and opportunities"
    - "secrecy in cooperative relay broadcast channels"

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)