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: "constructive interference through symbol level precoding for multi level modulation"
  Abstract: The constructive interference concept in the downlink of multiple-antenna systems is addressed in this paper. The concept of the joint exploitation of the channel state information (CSI) and data information (DI) is discussed. Using symbol-level precoding, the interference between data streams is transformed Under certain conditions into useful signal that can improve the signal to interference noise ratio (SINR) of the downlink transmissions. In the previous work, different constructive interference precoding techniques have been proposed for the MPSK scenario. In this context, a novel constructive interference precoding technique that tackles the transmit power minimization (min-power) with individual SINR constraints at each user's receivers is proposed assuming MQAM modulation. Extensive simulations are performed to validate the proposed technique.

Connected through hyperedge HE-1 (induced by source paper "symbol level and multicast precoding for multiuser multiantenna downlink a survey classification and challenges"):
  with members:
    - "channel estimation and performance analysis of one bit massive mimo systems"
    - "an overview on resource allocation techniques for multi user mimo systems"
    - "spatio temporal waveform design for multiuser massive mimo downlink with 1 bit receivers"
    - "joint beamforming and broadcasting in massive mimo"
    - "coordinate update algorithms for robust power loading for the mu miso downlink with outage constraints"
    - "energy efficient symbol level precoding in multiuser miso based on relaxed detection region"
    - "robust transmission in downlink multiuser miso systems a rate splitting approach"
    - "adaptive pilot clustering in heterogeneous massive mimo networks"

Connected through hyperedge HE-2 (induced by source paper "interference exploitation in full duplex communications trading interference power for both uplink and downlink power savings"):
  with members:
    - "probabilistically robust swipt for secrecy misome systems"
    - "unraveling the rank one solution mystery of robust miso downlink transmit optimization a verifiable sufficient condition via a new duality result"
    - "transmit precoding for interference exploitation in the underlay cognitive radio z channel"
    - "energy efficient symbol level precoding in multiuser miso based on relaxed detection region"
    - "symbol level multiuser miso precoding for multi level adaptive modulation"
    - "multi objective resource allocation in full duplex swipt systems"
    - "constructive multiuser interference in symbol level precoding for the miso downlink channel"
    - "a geometrical based throughput bound analysis for device to device communications in cellular networks"

Connected through hyperedge HE-3 (induced by source paper "interference exploitation for radar and cellular coexistence the power efficient approach"):
  with members:
    - "robust mimo beamforming for cellular and radar coexistence"
    - "coexistence analysis between radar and cellular system in los channel"
    - "optimum co design for spectrum sharing between matrix completion based mimo radars and a mimo communication system"
    - "exploiting known interference as green signal power for downlink beamforming optimization"
    - "target detection performance of spectrum sharing mimo radars"
    - "overlapped mimo radar waveform design for coexistence with communication systems"
    - "cooperative radar and communications signaling the estimation and information theory odd couple"
    - "on the impact of time varying interference channel on the spatial approach of spectrum sharing between s band radar and communication system"

Connected through hyperedge HE-4 (induced by source paper "transmit precoding for interference exploitation in the underlay cognitive radio z channel"):
  with members:
    - "energy efficient symbol level precoding in multiuser miso based on relaxed detection region"
    - "secure m psk communication via directional modulation"
    - "directional modulation via symbol level precoding a way to enhance security"
    - "constructive multiuser interference in symbol level precoding for the miso downlink channel"
    - "exploiting known interference as green signal power for downlink beamforming optimization"
    - "rethinking the role of interference in wireless networks"
    - "dynamic resource allocation in cognitive radio networks"
    - "training and feedback optimization for multiuser mimo downlink"

Connected through hyperedge HE-5 (induced by source paper "m qam precoder design for mimo directional modulation transceivers"):
  with members:
    - "energy efficient symbol level precoding in multiuser miso based on relaxed detection region"
    - "directional modulation via symbol level precoding a way to enhance security"
    - "constructive multiuser interference in symbol level precoding for the miso downlink channel"
    - "exploiting known interference as green signal power for downlink beamforming optimization"
    - "single user beamforming in large scale miso systems with per antenna constant envelope constraints the doughnut channel"

Connected through hyperedge HE-6 (induced by source paper "energy efficient symbol level precoding in multiuser miso based on relaxed detection region"):
  with members:
    - "symbol level multiuser miso precoding for multi level adaptive modulation a multicast view"
    - "constructive multiuser interference in symbol level precoding for the miso downlink channel"
    - "energy efficient symbol level precoding in multiuser miso channels"
    - "exploiting known interference as green signal power for downlink beamforming optimization"
    - "multicast multigroup precoding and user scheduling for frame based satellite communications"
    - "optimal multiuser transmit beamforming a difficult problem with a simple solution structure"
    - "a multicast approach for constructive interference precoding in miso downlink channel"
    - "full frequency reuse multibeam satcoms frame based precoding and user scheduling"

Connected through hyperedge HE-7 (induced by source paper "symbol level multiuser miso precoding for multi level adaptive modulation"):
  with members:
    - "energy efficient symbol level precoding in multiuser miso based on relaxed detection region"
    - "directional modulation via symbol level precoding a way to enhance security"
    - "precoding in multibeam satellite communications present and future challenges"
    - "constructive multiuser interference in symbol level precoding for the miso downlink channel"
    - "energy efficient symbol level precoding in multiuser miso channels"
    - "exploiting known interference as green signal power for downlink beamforming optimization"
    - "multicast multigroup precoding and user scheduling for frame based satellite communications"
    - "optimal multiuser transmit beamforming a difficult problem with a simple solution structure"

Connected through hyperedge HE-8 (induced by source paper "symbol level multiuser miso precoding for multi level adaptive modulation a multicast view"):
  with members:
    - "energy efficient symbol level precoding in multiuser miso based on relaxed detection region"
    - "constructive multiuser interference in symbol level precoding for the miso downlink channel"
    - "energy efficient symbol level precoding in multiuser miso channels"
    - "exploiting known interference as green signal power for downlink beamforming optimization"
    - "multicast multigroup precoding and user scheduling for frame based satellite communications"
    - "optimal multiuser transmit beamforming a difficult problem with a simple solution structure"
    - "a multicast approach for constructive interference precoding in miso downlink channel"
    - "weighted fair multicast multigroup beamforming under per antenna power constraints"

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)