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: "phase noise influence in optical ofdm systems employing rf pilot tone for phase noise cancellation"
  Abstract: For coherent and direct-detection Orthogonal Frequency Division Multiplexed (OFDM) systems employing radio frequency (RF) pilot tone phase noise cancellation the influence of laser phase noise is evaluated. Novel analytical results for the common phase error and for the (modulation dependent) inter carrier interference are evaluated based upon Gaussian statistics for the laser phase noise. In the evaluation it is accounted for that the laser phase noise is filtered in the correlation signal detection. Numerical results are presented for OFDM systems with 4 and 16 PSK modulation, 200 OFDM bins and baud rate of 1 GS/s. It is found that about 225 km transmission is feasible for the coherent 4PSK-OFDM system over normal (G.652) fiber.

Connected through hyperedge HE-1 (induced by source paper "digital signal processing for optical communications and networks i linear compensation"):
  with members:
    - "achievable information rates estimates in optically amplified transmission systems using nonlinearity compensation and probabilistic shaping"
    - "analysis of chromatic dispersion compensation and carrier phase recovery in long haul optical transmission system influenced by equalization enhanced phase noise"
    - "analytical investigations on carrier phase recovery in dispersion unmanaged n psk coherent optical communication systems"
    - "phase noise influence in long range coherent optical ofdm systems with delay detection ifft multiplexing and fft demodulation"
    - "phase noise influence in coherent optical ofdm systems with rf pilot tone digital ifft multiplexing and fft demodulation"
    - "analytical estimation in differential optical transmission systems influenced by equalization enhanced phase noise"
    - "digital adaptive carrier phase estimation in multi level phase shift keying coherent optical communication systems"
    - "comparative study on carrier phase estimation methods in dispersion unmanaged optical transmission systems"

Connected through hyperedge HE-2 (induced by source paper "analysis of chromatic dispersion compensation and carrier phase recovery in long haul optical transmission system influenced by equalization enhanced phase noise"):
  with members:
    - "analytical investigations on carrier phase recovery in dispersion unmanaged n psk coherent optical communication systems"
    - "phase noise influence in long range coherent optical ofdm systems with delay detection ifft multiplexing and fft demodulation"
    - "phase noise influence in coherent optical ofdm systems with rf pilot tone digital ifft multiplexing and fft demodulation"
    - "analytical estimation in differential optical transmission systems influenced by equalization enhanced phase noise"
    - "digital adaptive carrier phase estimation in multi level phase shift keying coherent optical communication systems"

Connected through hyperedge HE-3 (induced by source paper "comprehensive study of cd compensation and carrier phase estimation in optical communication systems influenced by equalization enhanced phase noise"):
  with members:
    - "phase noise influence in long range coherent optical ofdm systems with delay detection ifft multiplexing and fft demodulation"
    - "phase noise influence in coherent optical ofdm systems with rf pilot tone digital ifft multiplexing and fft demodulation"
    - "analytical estimation in differential optical transmission systems influenced by equalization enhanced phase noise"
    - "digital adaptive carrier phase estimation in multi level phase shift keying coherent optical communication systems"

Connected through hyperedge HE-4 (induced by source paper "digital feed back carrier phase recovery in n psk coherent optical fiber systems"):
  with members:
    - "analysis of chromatic dispersion compensation and carrier phase recovery in long haul optical transmission system influenced by equalization enhanced phase noise"
    - "phase noise influence in long range coherent optical ofdm systems with delay detection ifft multiplexing and fft demodulation"
    - "phase noise influence in coherent optical ofdm systems with rf pilot tone digital ifft multiplexing and fft demodulation"

Connected through hyperedge HE-5 (induced by source paper "dynamic electronic dispersion equalization in coherent optical networks using variable step size least mean square algorithm"):
  with members:
    - "phase noise influence in long range coherent optical ofdm systems with delay detection ifft multiplexing and fft demodulation"
    - "phase noise influence in coherent optical ofdm systems with rf pilot tone digital ifft multiplexing and fft demodulation"
    - "analytical estimation in differential optical transmission systems influenced by equalization enhanced phase noise"

Connected through hyperedge HE-6 (induced by source paper "digital adaptive carrier phase estimation in multi level phase shift keying coherent optical communication systems"):
  with members:
    - "phase noise influence in long range coherent optical ofdm systems with delay detection ifft multiplexing and fft demodulation"
    - "phase noise influence in coherent optical ofdm systems with rf pilot tone digital ifft multiplexing and fft demodulation"

Connected through hyperedge HE-7 (induced by source paper "phase noise influence in long range coherent optical ofdm systems with delay detection ifft multiplexing and fft demodulation"):
  with members:
    - "phase noise influence in coherent optical ofdm systems with rf pilot tone digital ifft multiplexing and fft demodulation"

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.OH(Other Computer Science)