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: "optimal beamforming in interference networks with perfect local channel information"
  Abstract: We consider settings in which T multi-antenna transmitters and K single-antenna receivers concurrently utilize the available communication resources. Each transmitter sends useful information only to its intended receivers and can degrade the performance of unintended systems. Here, we assume the performance measures associated with each receiver are monotonic with the received power gains. In general, the joint performance of the systems is desired to be Pareto optimal. However, designing Pareto optimal resource allocation schemes is known to be difficult. In order to reduce the complexity of achieving efficient operating points, we show that it is sufficient to consider rank-1 transmit covariance matrices and propose a framework for determining the efficient beamforming vectors. These beamforming vectors are thereby also parameterized by T(K-1) real-valued parameters each between zero and one. The framework is based on analyzing each transmitter's power gain-region which is composed of all jointly achievable power gains at the receivers. The efficient beamforming vectors are on a specific boundary section of the power gain-region, and in certain scenarios it is shown that it is necessary to perform additional power allocation on the beamforming vectors. Two examples which include broadcast and multicast data as well as a cognitive radio application scenario illustrate the results.

Connected through hyperedge HE-1 (induced by source paper "heterogeneous multi tier networks improper signaling for joint rate energy optimization"):
  with members:
    - "optimal power splitting for simultaneous information detection and energy harvesting"
    - "improper signaling and symbol extensions how far can we go with gaussian p2p codebooks in the interfering mac with tin"
    - "wireless powered communication opportunities and challenges"
    - "all digital self interference cancellation technique for full duplex systems"
    - "multiobjective signal processing optimization the way to balance conflicting metrics in 5g systems"
    - "passive self interference suppression for full duplex infrastructure nodes"
    - "design and characterization of a full duplex multiantenna system for wifi networks"
    - "optimized transmission with improper gaussian signaling in the k user miso interference channel"

Connected through hyperedge HE-2 (induced by source paper "harvesting the self interference in heterogeneous full duplex networks for joint rate energy optimization"):
  with members:
    - "all digital self interference cancellation technique for full duplex systems"
    - "multiobjective signal processing optimization the way to balance conflicting metrics in 5g systems"
    - "passive self interference suppression for full duplex infrastructure nodes"
    - "design and characterization of a full duplex multiantenna system for wifi networks"
    - "optimized transmission with improper gaussian signaling in the k user miso interference channel"
    - "transmit optimization with improper gaussian signaling for interference channels"
    - "in band full duplex wireless challenges and opportunities"
    - "wireless information and power transfer architecture design and rate energy tradeoff"

Connected through hyperedge HE-3 (induced by source paper "robust group sparse beamforming for multicast green cloud ran with imperfect csi"):
  with members:
    - "large scale convex optimization for dense wireless cooperative networks"
    - "large scale convex optimization for ultra dense cloud ran"
    - "scalable coordinated beamforming for dense wireless cooperative networks"
    - "what will 5g be"
    - "group sparse beamforming for green cloud ran"
    - "joint precoding and multivariate backhaul compression for the downlink of cloud radio access networks"
    - "optimal stochastic coordinated beamforming for wireless cooperative networks with csi uncertainty"
    - "distributed robust multicell coordinated beamforming with imperfect csi an admm approach"

Connected through hyperedge HE-4 (induced by source paper "signaling design of two way mimo full duplex channel optimality under imperfect transmit front end chain"):
  with members:
    - "energy efficient power control a look at 5g wireless technologies"
    - "hardware impairments aware transceiver for full duplex massive mimo relaying"
    - "optimal signaling of miso full duplex two way wireless channel"
    - "coalitional games for transmitter cooperation in mimo multiple access channels"
    - "massive mimo systems with non ideal hardware energy efficiency estimation and capacity limits"
    - "understanding the impact of phase noise on active cancellation in wireless full duplex"
    - "experiment driven characterization of full duplex wireless systems"
    - "the capacity of mimo channels with per antenna power constraint"

Connected through hyperedge HE-5 (induced by source paper "optimal signaling of miso full duplex two way wireless channel"):
  with members:
    - "experiment driven characterization of full duplex wireless systems"
    - "self interference cancellation in multi hop full duplex networks via structured signaling"
    - "full duplex bidirectional mimo achievable rates under limited dynamic range"
    - "cooperative interference management with miso beamforming"

Connected through hyperedge HE-6 (induced by source paper "weak secrecy in the multi way untrusted relay channel with compute and forward"):
  with members:
    - "secure compute and forward in a bidirectional relay"
    - "semantically secure lattice codes for the gaussian wiretap channel"
    - "secure communication via an untrusted non regenerative relay in fading channels"
    - "reliable physical layer network coding"
    - "strongly secure communications over the two way wiretap channel"
    - "strong secrecy from channel resolvability"
    - "integer forcing linear receivers"
    - "cooperation with an untrusted relay a secrecy perspective"

Connected through hyperedge HE-7 (induced by source paper "multicell coordinated beamforming with rate outage constraint part i complexity analysis"):
  with members:
    - "signal processing and optimal resource allocation for the interference channel"
    - "multicell coordinated beamforming with rate outage constraint part ii efficient approximation algorithms"
    - "coordinated beamforming for multiuser miso interference channel under rate outage constraints"
    - "achievable outage rate regions for the miso interference channel"
    - "pareto characterization of the multicell mimo performance region with simple receivers"
    - "outage probability and outage based robust beamforming for mimo interference channels with imperfect channel state information"
    - "achieving global optimality for weighted sum rate maximization in the k user gaussian interference channel with multiple antennas"
    - "optimality properties distributed strategies and measurement based evaluation of coordinated multicell ofdma transmission"

Connected through hyperedge HE-8 (induced by source paper "distributed asynchronous optimization framework for the miso interference channel"):
  with members:
    - "robust monotonic optimization framework for multicell miso systems"
    - "non convex utility maximization in gaussian miso broadcast and interference channels"
    - "cooperative interference management with miso beamforming"
    - "on the optimality of beamforming for multi user miso interference channels with single user detection"
    - "multiuser mimo achievable rates with downlink training and channel state 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)