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: "backscatter communications for the internet of things a stochastic geometry approach"
  Abstract: Powering the massive number of small computing devices in the Internet of Things (IoT) is a major challenge because replacing their batteries or powering them with wires is very expensive and impractical. A viable option to enable a perpetual network operation is through the use of far-field Wireless Power Transfer (WPT). We study a large network architecture that uses a combination of WPT and backscatter communication. The network consists of power beacons (PBs) and passive backscatter nodes (BNs), and their locations are modeled as points of independent Poisson point processes (PPPs). The PBs transmit a sinusoidal continuous wave (CW) and the BNs reflect back a portion of this signal while harvesting the remaining part. A BN harvests energy from multiple nearby PBs and modulates its information bits on the composite CW through backscatter modulation. The analysis poses real challenges due to the double fading channel, and its dependence on the PPPs of both BNs and PBs. With the help of stochastic geometry, we derive the coverage probability and the capacity of the network in tractable and easily computable expressions. These expressions depend on the density of both PB and BN, both forward and backward path loss exponents, transmit power of the PB, backscattering efficiency, and number of PBs in a harvesting region. We observe that the coverage probability decreases with an increase in the density of the BNs, while the capacity of the network improves. We compare the performance of this network with a regular powered network in which the BNs have a reliable power source and show that for certain parameters the coverage of the former network approaches that of the regular powered network.

Connected through hyperedge HE-1 (induced by source paper "performance characterisation of relaying using backscatter devices"):
  with members:
    - "ambient backscatter systems exact average bit error rate under fading channels"
    - "fm backscatter enabling connected cities and smart fabrics"
    - "modulation in the air backscatter communication over ambient ofdm carrier"
    - "wirelessly powered backscatter communication networks modeling coverage and capacity"
    - "semi coherent detection and performance analysis for ambient backscatter system"

Connected through hyperedge HE-2 (induced by source paper "wireless powered asynchronous backscatter networks with sporadic short packets performance analysis and optimization"):
  with members:
    - "modeling and analysis of cellular networks using stochastic geometry a tutorial"
    - "physical layer security in mimo backscatter wireless systems"
    - "full duplex backscatter interference networks based on time hopping spread spectrum"
    - "some new research trends in wirelessly powered communications"
    - "massive machine type communications in 5g physical and mac layer solutions"
    - "wirelessly powered backscatter communication networks modeling coverage and capacity"
    - "wireless powered communication opportunities and challenges"
    - "a stochastic geometry framework for asynchronous full duplex networks"

Connected through hyperedge HE-3 (induced by source paper "treating interference as noise in cellular networks a stochastic geometry approach"):
  with members:
    - "system level modeling and optimization of the energy efficiency in cellular networks a stochastic geometry framework"
    - "downlink and uplink decoupling in two tier heterogeneous networks with multi antenna base stations"
    - "enhanced cellular coverage and throughput using rateless codes"
    - "analytical modeling of interference aware power control for the uplink of heterogeneous cellular networks"
    - "stochastic geometry modeling and analysis of multi tier millimeter wave cellular networks"
    - "optimality of treating interference as noise a combinatorial perspective"
    - "coverage and rate analysis for millimeter wave cellular networks"
    - "on off macrocells and load balancing in heterogeneous cellular networks"

Connected through hyperedge HE-4 (induced by source paper "multiuser wirelessly powered backscatter communications nonlinearity waveform design and sinr energy tradeoff"):
  with members:
    - "fundamentals of wireless information and power transfer from rf energy harvester models to signal and system designs"
    - "wirelessly powered backscatter communications waveform design and snr energy tradeoff"
    - "large scale multiantenna multisine wireless power transfer"
    - "prototyping and experimentation of a closed loop wireless power transmission with channel acquisition and waveform optimization"
    - "low complexity adaptive multisine waveform design for wireless power transfer"
    - "waveform design for wireless power transfer"
    - "wireless information and power transfer nonlinearity waveform design and rate energy tradeoff"
    - "wirelessly powered backscatter communication networks modeling coverage and capacity"

Connected through hyperedge HE-5 (induced by source paper "optimal time scheduling for wireless powered backscatter communication networks"):
  with members:
    - "backscatter communications for wireless powered sensor networks with collision resolution"
    - "ambient backscatter communications a contemporary survey"
    - "wireless powered communication opportunities and challenges"
    - "throughput maximization in wireless powered communication networks"
    - "decentralized delay optimal control for interference networks with limited renewable energy storage"

Connected through hyperedge HE-6 (induced by source paper "ambient backscatter communications a contemporary survey"):
  with members:
    - "cooperative ambient backscatter communications for green internet of things"
    - "pixelated vlc backscattering for self charging indoor iot devices"
    - "wirelessly powered backscatter communications waveform design and snr energy tradeoff"
    - "lora backscatter enabling the vision of ubiquitous connectivity"
    - "backscatter communications for internet of things theory and applications"
    - "ambient backscatter networking a novel paradigm to assist wireless powered communications"
    - "backscatter multiplicative multiple access systems fundamental limits and practical design"
    - "scatter radio receivers for extended range environmental sensing wsns"

Connected through hyperedge HE-7 (induced by source paper "design of non orthogonal multiple access enhanced backscatter communication"):
  with members:
    - "spectral and energy efficient wireless powered iot networks noma or tdma"
    - "massive non orthogonal multiple access for cellular iot potentials and limitations"
    - "a survey on non orthogonal multiple access for 5g networks research challenges and future trends"
    - "inference from randomized transmissions by many backscatter sensors"
    - "backscatter communications for wireless powered sensor networks with collision resolution"
    - "modulation in the air backscatter communication over ambient ofdm carrier"
    - "wireless powered communications with non orthogonal multiple access"
    - "full duplex backscatter interference networks based on time hopping spread spectrum"

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)