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: "channel quantization for physical layer network coded two way relaying"
  Abstract: The design of modulation schemes for the physical layer network-coded two way relaying scenario is considered with the protocol which employs two phases: Multiple access (MA) Phase and Broadcast (BC) phase. It was observed by Koike-Akino et al. that adaptively changing the network coding map used at the relay according to the channel conditions greatly reduces the impact of multiple access interference which occurs at the relay during the MA phase. In other words, the set of all possible channel realizations (the complex plane) is quantized into a finite number of regions, with a specific network coding map giving the best performance in a particular region. We highlight the issues associated with the scheme proposed by Koike-Akino et al. and propose a scheme which solves these issues. We obtain a quantization of the set of all possible channel realizations analytically for the case when $M$-PSK (for $M$ any power of 2) is the signal set used during the MA phase. It is shown that the complex plane can be classified into two regions: a region in which any network coding map which satisfies the so called exclusive law gives the same best performance and a region in which the choice of the network coding map affects the performance, which is further quantized based on the choice of the network coding map which optimizes the performance. The quantization thus obtained analytically, leads to the same as the one obtained using computer search for 4-PSK signal set by Koike-Akino et al., when specialized for $M=4.$

Connected through hyperedge HE-1 (induced by source paper "distributed space time coding for wireless two way relaying"):
  with members:
    - "wireless network coding for mimo two way relaying using latin rectangles"
    - "physical layer network coding for two way relaying with qam and latin squares"
    - "wireless bidirectional relaying and latin squares"
    - "multilevel coding schemes for compute and forward"
    - "power allocation strategies and lattice based coding schemes for bi directional relaying"
    - "physical network coding in two way wireless relay channels"
    - "on fast decodable space time block codes"

Connected through hyperedge HE-2 (induced by source paper "physical layer network coding for two way relaying with qam"):
  with members:
    - "an adaptive modulation scheme for two user fading mac with quantized fade state feedback"
    - "physical layer network coding for two way relaying with qam and latin squares"
    - "performance analysis of adaptive physical layer network coding for wireless two way relaying"
    - "wireless bidirectional relaying and latin squares"
    - "multilevel coding schemes for compute and forward"
    - "physical network coding in two way wireless relay channels"

Connected through hyperedge HE-3 (induced by source paper "symbol and bit mapping optimization for physical layer network coding with pulse amplitude modulation"):
  with members:
    - "asynchronous physical layer network coding"
    - "physical layer network coding for two way relaying with qam and latin squares"
    - "reliable physical layer network coding"
    - "physical layer network coding tutorial survey and beyond"
    - "compute and forward harnessing interference through structured codes"

Connected through hyperedge HE-4 (induced by source paper "wireless network coded four way relaying using latin hyper cubes"):
  with members:
    - "wireless bidirectional relaying and latin squares"
    - "wireless network coded three way relaying using latin cubes"
    - "physical network coding in two way wireless relay channels"

Connected through hyperedge HE-5 (induced by source paper "wireless network coded accumulate compute and forward two way relaying"):
  with members:
    - "wireless bidirectional relaying and latin squares"
    - "multilevel coding schemes for compute and forward"
    - "multicell zero forcing and user scheduling on the downlink of a linear cell array"
    - "adaptive spatial intercell interference cancellation in multicell wireless networks"
    - "physical network coding in two way wireless relay channels"

Connected through hyperedge HE-6 (induced by source paper "performance analysis of adaptive physical layer network coding for wireless two way relaying"):
  with members:
    - "differential modulation for bi directional relaying with analog network coding"
    - "wireless bidirectional relaying and latin squares"
    - "multilevel coding schemes for compute and forward"
    - "power allocation strategies and lattice based coding schemes for bi directional relaying"
    - "physical network coding in two way wireless relay channels"

Connected through hyperedge HE-7 (induced by source paper "wireless network coding for mimo two way relaying using latin rectangles"):
  with members:
    - "wireless bidirectional relaying and latin squares"
    - "power allocation strategies and lattice based coding schemes for bi directional relaying"
    - "physical network coding in two way wireless relay channels"

Connected through hyperedge HE-8 (induced by source paper "physical layer network coding for two way relaying with qam and latin squares"):
  with members:
    - "wireless bidirectional relaying and latin squares"
    - "physical network coding in two way wireless relay 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)