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: "constellation precoded multiple beamforming"
  Abstract: Beamforming techniques that employ Singular Value Decomposition (SVD) are commonly used in Multi-Input Multi-Output (MIMO) wireless communication systems. In the absence of channel coding, when a single symbol is transmitted, these systems achieve the full diversity order provided by the channel; whereas when multiple symbols are simultaneously transmitted, this property is lost. When channel coding is employed, full diversity order can be achieved. For example, when Bit-Interleaved Coded Modulation (BICM) is combined with this technique, full diversity order of NM in an MxN MIMO channel transmitting S parallel streams is possible, provided a condition on S and the BICM convolutional code rate is satisfied. In this paper, we present constellation precoded multiple beamforming which can achieve the full diversity order both with BICM-coded and uncoded SVD systems. We provide an analytical proof of this property. To reduce the computational complexity of Maximum Likelihood (ML) decoding in this system, we employ Sphere Decoding (SD). We report an SD technique that reduces the computational complexity beyond commonly used approaches to SD. This technique achieves several orders of magnitude reduction in computational complexity not only with respect to conventional ML decoding but also, with respect to conventional SD.

Connected through hyperedge HE-1 (induced by source paper "a survey on mimo transmission with discrete input signals technical challenges advances and future trends"):
  with members:
    - "asymptotic performance analysis of a k hop amplify and forward relay mimo channel"
    - "iterative distributed minimum total mse approach for secure communications in mimo interference channels"
    - "asymptotic analysis of su mimo channels with transmitter noise and mismatched joint decoding"
    - "secure massive mimo transmission with an active eavesdropper"
    - "interference aligned space time transmission with diversity for the 2 times 2 x network"
    - "space time encoded miso broadcast channel with outdated csit an error rate and diversity performance analysis"
    - "high snr asymptotics of mutual information for discrete constellations with applications to bicm"
    - "differential distributed space time coding with imperfect synchronization in frequency selective channels"

Connected through hyperedge HE-2 (induced by source paper "linear precoding for mimo channels with qam constellations and reduced complexity"):
  with members:
    - "low complexity mimo precoding with discrete signals and statistical csi"
    - "linear precoding for the mimo multiple access channel with finite alphabet inputs and statistical csi"
    - "diversity analysis of bit interleaved coded multiple beamforming with orthogonal frequency division multiplexing"
    - "energy and spectral efficiency of very large multiuser mimo systems"
    - "on optimal precoding in linear vector gaussian channels with arbitrary input distribution"
    - "pilot contamination and precoding in multi cell tdd systems"

Connected through hyperedge HE-3 (induced by source paper "full diversity precoding design of bit interleaved coded multiple beamforming with orthogonal frequency division multiplexing"):
  with members:
    - "diversity analysis of bit interleaved coded multiple beamforming with orthogonal frequency division multiplexing"
    - "multiple beamforming with perfect coding"
    - "bit interleaved coded multiple beamforming with perfect coding"
    - "constellation precoded beamforming"
    - "bit interleaved coded multiple beamforming with constellation precoding"
    - "diversity analysis of bit interleaved coded multiple beamforming"
    - "reduced complexity sphere decoding for square qam via a new lattice representation"

Connected through hyperedge HE-4 (induced by source paper "diversity analysis of bit interleaved coded multiple beamforming with orthogonal frequency division multiplexing"):
  with members:
    - "full diversity precoding design of bit interleaved coded multiple beamforming with orthogonal frequency division multiplexing"
    - "multiple beamforming with perfect coding"
    - "bit interleaved coded multiple beamforming with perfect coding"
    - "mimo networks the effects of interference"
    - "constellation precoded beamforming"
    - "bit interleaved coded multiple beamforming with constellation precoding"
    - "diversity analysis of bit interleaved coded multiple beamforming"

Connected through hyperedge HE-5 (induced by source paper "bit interleaved coded multiple beamforming with perfect coding"):
  with members:
    - "precoding by pairing subchannels to increase mimo capacity with discrete input alphabets"
    - "reduced complexity decoding for bit interleaved coded multiple beamforming with constellation precoding"
    - "golden coded multiple beamforming"
    - "constellation precoded beamforming"
    - "mimo precoding with x and y codes"
    - "reduced complexity sphere decoding"
    - "bit interleaved coded multiple beamforming with constellation precoding"
    - "diversity analysis of bit interleaved coded multiple beamforming"

Connected through hyperedge HE-6 (induced by source paper "multiple beamforming with perfect coding"):
  with members:
    - "reduced complexity decoding for bit interleaved coded multiple beamforming with constellation precoding"
    - "constellation precoded beamforming"
    - "reduced complexity sphere decoding"
    - "bit interleaved coded multiple beamforming with constellation precoding"
    - "diversity analysis of bit interleaved coded multiple beamforming"
    - "fast maximum likelihood decoding of the golden code"
    - "reduced complexity sphere decoding for square qam via a new lattice representation"
    - "perfect space time codes with minimum and non minimum delay for any number of antennas"

Connected through hyperedge HE-7 (induced by source paper "reduced complexity sphere decoding"):
  with members:
    - "reduced complexity decoding for bit interleaved coded multiple beamforming with constellation precoding"
    - "bit interleaved coded multiple beamforming with constellation precoding"
    - "reduced complexity sphere decoding for square qam via a new lattice representation"

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)