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: "joint beamforming and power splitting control in downlink cooperative swipt noma systems"
  Abstract: This paper investigates the application of simultaneous wireless information and power transfer (SWIPT) to cooperative non-orthogonal multiple access (NOMA). A new cooperative multiple-input single-output (MISO) SWIPT NOMA protocol is proposed, where a user with a strong channel condition acts as an energy-harvesting (EH) relay by adopting power splitting (PS) scheme to help a user with a poor channel condition. By jointly optimizing the PS ratio and the beamforming vectors, we aim at maximizing the data rate of the “strong user” while satisfying the QoS requirement of the “weak user”. To resolve the formulated nonconvex problem, the semidefinite relaxation (SDR) technique is applied to reformulate the original problem, by proving the rank-one optimality. And then an iterative algorithm based on successive convex approximation (SCA) is proposed for complexity reduction, which can at least attain its stationary point efficiently. In view of the potential application scenarios, e.g., Internet of Things (IoT), the single-input single-output (SISO) case is also studied. The formulated problem is proved to be strictly unimodal with respect to the PS ratio. Hence, a golden section search (GSS) based algorithm with closed-form solution at each step is proposed to find the unique global optimal solution. It is worth pointing out that the SCA method can also converge to the optimal solution in SISO cases. In the numerical simulation, the proposed algorithm is numerically shown to converge within a few iterations, and the SWIPT-aided NOMA protocol outperforms the existing transmission protocols.

Connected through hyperedge HE-1 (induced by source paper "a survey of rate optimal power domain noma schemes for enabling technologies of future wireless networks"):
  with members:
    - "generalized coordinated multipoint gcomp enabled noma outage capacity and power allocation"
    - "what role can noma play in massive mimo"
    - "uav data collection over noma backscatter networks uav altitude and trajectory optimization"
    - "uav communications for 5g and beyond recent advances and future trends"
    - "when full duplex wireless meets non orthogonal multiple access opportunities and challenges"
    - "on optimizing vlc networks for downlink multi user transmission a survey"
    - "beam design and user scheduling for nonorthogonal multiple access with multiple antennas based on pareto optimality"
    - "spatial modulation assisted multi antenna non orthogonal multiple access"

Connected through hyperedge HE-2 (induced by source paper "optimal task assignment and power allocation for noma mobile edge computing networks"):
  with members:
    - "joint power and time allocation for noma mec offloading"
    - "energy efficient resource allocation in noma heterogeneous networks"
    - "delay minimization for noma mec offloading"
    - "edge computing aware noma for 5g networks"
    - "impact of non orthogonal multiple access on the offloading of mobile edge computing"
    - "a survey on mobile edge computing the communication perspective"
    - "stochastic joint radio and computational resource management for multi user mobile edge computing systems"
    - "fog radio access networks mobility management interference mitigation and resource optimization"

Connected through hyperedge HE-3 (induced by source paper "transmission energy minimization for heterogeneous low latency noma downlink"):
  with members:
    - "joint power and time allocation for noma mec offloading"
    - "efficient error correcting codes in the short blocklength regime"
    - "delay minimization for noma mec offloading"
    - "short packets over block memoryless fading channels pilot assisted or noncoherent transmission"
    - "energy efficient non orthogonal transmission under reliability and finite blocklength constraints"
    - "energy efficient packet scheduling with finite blocklength codes convexity analysis and efficient algorithms"
    - "downlink transmission of short packets framing and control information revisited"
    - "blocklength limited performance of relaying under quasi static rayleigh channels"

Connected through hyperedge HE-4 (induced by source paper "harq cc enabled noma designs with outage probability constraints"):
  with members:
    - "on energy efficient noma designs for heterogeneous low latency downlink transmissions"
    - "on the performance of noma with hybrid arq"
    - "a survey on non orthogonal multiple access for 5g networks research challenges and future trends"
    - "sub channel assignment power allocation and user scheduling for non orthogonal multiple access networks"
    - "what will 5g be"
    - "on the performance of non orthogonal multiple access in 5g systems with randomly deployed users"
    - "coordinated beamforming for multiuser miso interference channel under rate outage constraints"
    - "on the complexity of joint subcarrier and power allocation for multi user ofdma systems"

Connected through hyperedge HE-5 (induced by source paper "capacity enhanced cooperative d2d systems over rayleigh fading channels with noma"):
  with members:
    - "short packet downlink transmission with non orthogonal multiple access"
    - "non orthogonal multiple access for cooperative communications challenges opportunities and trends"
    - "spatial and frequency wideband effects in millimeter wave massive mimo systems"
    - "channel estimation for tdd fdd massive mimo systems with channel covariance computing"
    - "resource allocation for downlink noma systems key techniques and open issues"
    - "a survey on non orthogonal multiple access for 5g networks research challenges and future trends"
    - "on the performance of noma based cooperative relaying systems over rician fading channels"
    - "outage performance for cooperative noma transmission with an af relay"

Connected through hyperedge HE-6 (induced by source paper "joint beamforming and power allocation in downlink noma multiuser mimo networks"):
  with members:
    - "noma in 5g systems exciting possibilities for enhancing spectral efficiency"
    - "capacity comparison between mimo noma and mimo oma with multiple users in a cluster"
    - "robust resource allocation for mimo wireless powered communication networks based on a non linear eh model"
    - "design of massive mimo noma with limited feedback"
    - "on the spectral efficiency and security enhancements of noma assisted multicast unicast streaming"
    - "a minorization maximization method for optimizing sum rate in the downlink of non orthogonal multiple access systems"
    - "non orthogonal multiple access noma for downlink multiuser mimo systems user clustering beamforming and power allocation"
    - "a general mimo framework for noma downlink and uplink transmission based on signal alignment"

Connected through hyperedge HE-7 (induced by source paper "hybrid precoding based millimeter wave massive mimo noma with simultaneous wireless information and power transfer"):
  with members:
    - "machine learning inspired energy efficient hybrid precoding for mmwave massive mimo systems"
    - "secure swipt networks based on a non linear energy harvesting model"
    - "energy efficient power allocation in millimeter wave massive mimo with non orthogonal multiple access"
    - "an overview of signal processing techniques for millimeter wave mimo systems"
    - "limited feedback hybrid precoding for multi user millimeter wave systems"
    - "a general mimo framework for noma downlink and uplink transmission based on signal alignment"
    - "simultaneous wireless information and power transfer in modern communication systems"
    - "joint transmit beamforming and receive power splitting for miso swipt systems"

Connected through hyperedge HE-8 (induced by source paper "nonorthogonal multiple access for beamforming in energy harvesting enabled networks"):
  with members:
    - "power allocation for energy efficiency and secrecy of interference wireless networks"
    - "achievable rate region of non orthogonal multiple access systems with wireless powered decoder"
    - "non orthogonal multiple access in large scale heterogeneous networks"
    - "wireless powered communications with non orthogonal multiple access"
    - "waveform design for wireless power transfer"
    - "path following algorithms for beamforming and signal splitting in rf energy harvesting networks"
    - "wireless information and power transfer nonlinearity waveform design and rate energy tradeoff"
    - "transceiver design for cooperative non orthogonal multiple access systems with wireless energy transfer"

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)