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: "secure on off transmission design with channel estimation errors"
  Abstract: Physical layer security has recently been regarded as an emerging technique to complement and improve the communication security in future wireless networks. The current research and development in physical layer security is often based on the ideal assumption of perfect channel knowledge or the capability of variable-rate transmissions. In this work, we study the secure transmission design in more practical scenarios by considering channel estimation errors at the receiver and investigating both fixed-rate and variable-rate transmissions. Assuming quasi-static fading channels, we design secure on-off transmission schemes to maximize the throughput subject to a constraint on secrecy outage probability. For systems with given and fixed encoding rates, we show how the optimal on-off transmission thresholds and the achievable throughput vary with the amount of knowledge on the eavesdropper's channel. In particular, our design covers the interesting case where the eavesdropper also uses the pilots sent from the transmitter to obtain imperfect channel estimation. An interesting observation is that using too much pilot power can harm the throughput of secure transmission if both the legitimate receiver and the eavesdropper have channel estimation errors, while the secure transmission always benefits from increasing pilot power when only the legitimate receiver has channel estimation errors but not the eavesdropper. When the encoding rates are controllable parameters to design, we further derive both a non-adaptive and an adaptive rate transmission schemes by jointly optimizing the encoding rates and the on-off transmission thresholds to maximize the throughput of secure transmissions.

Connected through hyperedge HE-1 (induced by source paper "on secure transmission design an information leakage perspective"):
  with members:
    - "secrecy outage for wireless sensor networks"
    - "securing on body iot devices by exploiting creeping wave propagation"
    - "resonance based secure pairing for wearables"
    - "on secrecy metrics for physical layer security over quasi static fading channels"
    - "rethinking the secrecy outage formulation a secure transmission design perspective"

Connected through hyperedge HE-2 (induced by source paper "artificial noise injection for securing single antenna systems"):
  with members:
    - "on secrecy metrics for physical layer security over quasi static fading channels"
    - "artificial noise aided secrecy information and power transfer in ofdma systems"
    - "achieving secrecy without knowing the number of eavesdropper antennas"
    - "improving physical layer secrecy using full duplex jamming receivers"
    - "power allocation and time domain artificial noise design for wiretap ofdm with discrete inputs"
    - "rethinking the secrecy outage formulation a secure transmission design perspective"
    - "secure transmission with artificial noise over fading channels achievable rate and optimal power allocation"

Connected through hyperedge HE-3 (induced by source paper "covert communication in fading channels under channel uncertainty"):
  with members:
    - "on covert communication with noise uncertainty"
    - "fundamental limits of communication with low probability of detection"
    - "covert communication in the presence of an uninformed jammer"
    - "covert communication over noisy channels a resolvability perspective"
    - "reliable deniable communication hiding messages in noise"
    - "limits of reliable communication with low probability of detection on awgn channels"

Connected through hyperedge HE-4 (induced by source paper "on secrecy metrics for physical layer security over quasi static fading channels"):
  with members:
    - "performance assessment and design of finite length ldpc codes for the gaussian wiretap channel"
    - "rethinking the intercept probability of random linear network coding"
    - "probability estimates for fading and wiretap channels from ideal class zeta functions"
    - "wireless physical layer security with imperfect channel state information a survey"
    - "coding with scrambling concatenation and harq for the awgn wire tap channel a security gap analysis"
    - "secret sharing ldpc codes for the bpsk constrained gaussian wiretap channel"
    - "ldpc code design for the bpsk constrained gaussian wiretap channel"
    - "rethinking the secrecy outage formulation a secure transmission design perspective"

Connected through hyperedge HE-5 (induced by source paper "on the design of secure non orthogonal multiple access systems"):
  with members:
    - "on secrecy metrics for physical layer security over quasi static fading channels"
    - "secrecy sum rate maximization in non orthogonal multiple access"
    - "a survey of downlink non orthogonal multiple access for 5g wireless communication networks"
    - "achieving secrecy without knowing the number of eavesdropper antennas"
    - "fairness for non orthogonal multiple access in 5g systems"
    - "a general mimo framework for noma downlink and uplink transmission based on signal alignment"
    - "on the performance of non orthogonal multiple access in 5g systems with randomly deployed users"
    - "large system analysis of linear precoding in miso broadcast channels with confidential messages"

Connected through hyperedge HE-6 (induced by source paper "achieving secrecy without knowing the number of eavesdropper antennas"):
  with members:
    - "analysis of degrees of freedom of wideband random multipath fields observed over time and space windows"
    - "massive mimo for next generation wireless systems"
    - "what will 5g be"
    - "band limited signals observed over finite spatial and temporal windows an upper bound to signal degrees of freedom"
    - "wireless physical layer security with imperfect channel state information a survey"
    - "robust beamforming for security in mimo wiretap channels with imperfect csi"
    - "secure transmission with artificial noise over fading channels achievable rate and optimal power allocation"
    - "secure transmission with multiple antennas ii the mimome wiretap channel"

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)