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: "asynchronous orthogonal differential decoding for multiple access channels"
  Abstract: We propose several differential decoding schemes for asynchronous multi-user MIMO systems based on orthogonal space-time block codes (OSTBCs) where neither the transmitters nor the receiver has knowledge of the channel. First, we derive novel low complexity differential decoders by performing interference cancelation in time and employing different decoding methods. The decoding complexity of these schemes grows linearly with the number of users. We then present additional differential decoding schemes that perform significantly better than our low complexity decoders and outperform the existing synchronous differential schemes but require higher decoding complexity compared to our low complexity decoders. The proposed schemes work for any square OSTBC, any constant amplitude constellation, any number of users, and any number of receive antennas. Furthermore, we analyze the diversity of the proposed schemes and derive conditions under which our schemes provide full diversity. For the cases of two and four transmit antennas, we provide examples of PSK constellations to achieve full diversity. Simulation results show that our differential schemes provide good performance. To the best of our knowledge, the proposed differential detection schemes are the first differential schemes for asynchronous multi-user systems.

Connected through hyperedge HE-1 (induced by source paper "cooperative asynchronous non orthogonal multiple access with power minimization under qos constraints"):
  with members:
    - "an analysis of two user uplink asynchronous non orthogonal multiple access systems"
    - "exploiting full half duplex user relaying in noma systems"
    - "a survey on non orthogonal multiple access for 5g networks research challenges and future trends"
    - "outage performance for cooperative noma transmission with an af relay"
    - "wireless network level partial relay cooperation a stable throughput analysis"
    - "interference mitigation using asynchronous transmission and sampling diversity"
    - "cooperative non orthogonal multiple access with simultaneous wireless information and power transfer"
    - "distributed beamforming in wireless multiuser relay interference networks with quantized feedback"

Connected through hyperedge HE-2 (induced by source paper "an analysis of two user uplink asynchronous non orthogonal multiple access systems"):
  with members:
    - "downlink non orthogonal multiple access with limited feedback"
    - "a survey on non orthogonal multiple access for 5g networks research challenges and future trends"
    - "asynchronous physical layer network coding symbol misalignment estimation and its effect on decoding"
    - "interference mitigation using asynchronous transmission and sampling diversity"
    - "differential distributed space time coding with imperfect synchronization in frequency selective channels"
    - "asynchronous physical layer network coding"

Connected through hyperedge HE-3 (induced by source paper "an analysis of uplink asynchronous non orthogonal multiple access systems"):
  with members:
    - "downlink non orthogonal multiple access with limited feedback"
    - "a survey on non orthogonal multiple access for 5g networks research challenges and future trends"
    - "interference mitigation using asynchronous transmission and sampling diversity"
    - "differential distributed space time coding with imperfect synchronization in frequency selective channels"

Connected through hyperedge HE-4 (induced by source paper "novel time asynchronous noma schemes for downlink transmissions"):
  with members:
    - "on the performance of mrc receiver with unknown timing mismatch a large scale analysis"
    - "interference mitigation using asynchronous transmission and sampling diversity"
    - "the application of mimo to non orthogonal multiple access"

Connected through hyperedge HE-5 (induced by source paper "on the performance of mrc receiver with unknown timing mismatch a large scale analysis"):
  with members:
    - "interference mitigation using asynchronous transmission and sampling diversity"
    - "power scaling of uplink massive mimo systems with arbitrary rank channel means"
    - "differential distributed space time coding with imperfect synchronization in frequency selective channels"
    - "scalable synchronization and reciprocity calibration for distributed multiuser mimo"
    - "scaling up mimo opportunities and challenges with very large arrays"
    - "energy and spectral efficiency of very large multiuser mimo systems"

Connected through hyperedge HE-6 (induced by source paper "interference mitigation using asynchronous transmission and sampling diversity"):
  with members:
    - "differential distributed space time coding with imperfect synchronization in frequency selective channels"

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)