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: "linear transceiver design for interference alignment complexity and computation"
  Abstract: Consider a MIMO interference channel whereby each transmitter and receiver are equipped with multiple antennas. The basic problem is to design optimal linear transceivers (or beamformers) that can maximize system throughput. The recent work [1] suggests that optimal beamformers should maximize the total degrees of freedom and achieve interference alignment in high SNR. In this paper we first consider the interference alignment problem in spatial domain and prove that the problem of maximizing the total degrees of freedom for a given MIMO interference channel is NP-hard. Furthermore, we show that even checking the achievability of a given tuple of degrees of freedom for all receivers is NP-hard when each receiver is equipped with at least three antennas. Interestingly, the same problem becomes polynomial time solvable when each transmit/receive node is equipped with no more than two antennas. Finally, we propose a distributed algorithm for transmit covariance matrix design, while assuming each receiver uses a linear MMSE beamformer. The simulation results show that the proposed algorithm outperforms the existing interference alignment algorithms in terms of system throughput.

Connected through hyperedge HE-1 (induced by source paper "iterative distributed minimum total mse approach for secure communications in mimo interference channels"):
  with members:
    - "distributed energy spectral efficiency optimization for partial full interference alignment in multi user multi relay multi cell mimo systems"
    - "fifty years of mimo detection the road to large scale mimos"
    - "secure degrees of freedom of one hop wireless networks"
    - "degrees of freedom of the three user rank deficient mimo interference channel"
    - "limited feedback based interference alignment for interfering multi access channels"
    - "enhancing secrecy with multi antenna transmission in wireless ad hoc networks"
    - "filter design with secrecy constraints the mimo gaussian wiretap channel"
    - "interference alignment for secrecy"

Connected through hyperedge HE-2 (induced by source paper "distributed long term base station clustering in cellular networks using coalition formation"):
  with members:
    - "adaptive pilot clustering in heterogeneous massive mimo networks"
    - "globally optimal base station clustering in interference alignment based multicell networks"
    - "cooperative base station coloring for pair wise multi cell coordination"
    - "overhead aware distributed csi selection in the mimo interference channel"
    - "interference alignment aided base station clustering using coalition formation"
    - "what will 5g be"
    - "on the feasibility of linear interference alignment for mimo interference broadcast channels with constant coefficients"
    - "coalitional games in partition form for joint spectrum sensing and access in cognitive radio networks"

Connected through hyperedge HE-3 (induced by source paper "generalized interference alignment part i theoretical framework"):
  with members:
    - "the feasibility conditions for interference alignment in mimo networks"
    - "on the degrees of freedom achievable through interference alignment in a mimo interference channel"
    - "a feasibility test for linear interference alignment in mimo channels with constant coefficients"
    - "subspace alignment chains and the degrees of freedom of the three user mimo interference channel"
    - "settling the feasibility of interference alignment for the mimo interference channel the symmetric square case"
    - "interference alignment for secrecy"
    - "cooperative algorithms for mimo interference channels"
    - "interference alignment as a rank constrained rank minimization"

Connected through hyperedge HE-4 (induced by source paper "signal processing and optimal resource allocation for the interference channel"):
  with members:
    - "joint power and admission control via linear programming deflation"
    - "on the degrees of freedom achievable through interference alignment in a mimo interference channel"
    - "linear transceiver design for a mimo interfering broadcast channel achieving max min fairness"
    - "averaged iterative water filling algorithm robustness and convergence"
    - "robust linear precoder design for multi cell downlink transmission"
    - "rate region frontiers for n user interference channel with interference as noise"
    - "balancing egoism and altruism on the interference channel the mimo case"
    - "capacity regions and sum rate capacities of vector gaussian interference channels"

Connected through hyperedge HE-5 (induced by source paper "transmit optimization with improper gaussian signaling for interference channels"):
  with members:
    - "complex valued random vectors and channels entropy divergence and capacity"
    - "robust monotonic optimization framework for multicell miso systems"
    - "achieving global optimality for weighted sum rate maximization in the k user gaussian interference channel with multiple antennas"
    - "optimal beamforming in interference networks with perfect local channel information"
    - "cooperative algorithms for mimo interference channels"
    - "on feasibility of interference alignment in mimo interference networks"
    - "cooperative interference management with miso beamforming"
    - "on feasibility of interference alignment in mimo interference networks"

Connected through hyperedge HE-6 (induced by source paper "optimized transmission with improper gaussian signaling in the k user miso interference channel"):
  with members:
    - "transmit optimization with improper gaussian signaling for interference channels"
    - "pareto characterization of the multicell mimo performance region with simple receivers"
    - "robust monotonic optimization framework for multicell miso systems"
    - "achieving global optimality for weighted sum rate maximization in the k user gaussian interference channel with multiple antennas"
    - "optimal beamforming in interference networks with perfect local channel information"
    - "rate region frontiers for n user interference channel with interference as noise"
    - "balancing egoism and altruism on the interference channel the mimo case"
    - "cooperative interference management with miso beamforming"

Connected through hyperedge HE-7 (induced by source paper "interference alignment using finite and dependent channel extensions the single beam case"):
  with members:
    - "real interference alignment exploiting the potential of single antenna systems"
    - "on the degrees of freedom achievable through interference alignment in a mimo interference channel"
    - "a feasibility test for linear interference alignment in mimo channels with constant coefficients"
    - "settling the feasibility of interference alignment for the mimo interference channel the symmetric square case"
    - "interference alignment for the k user mimo interference channel"
    - "exploiting channel correlations simple interference alignment schemes with no csit"
    - "on feasibility of interference alignment in mimo interference networks"
    - "on feasibility of interference alignment in mimo interference networks"

Connected through hyperedge HE-8 (induced by source paper "interference alignment in distributed antenna systems"):
  with members:
    - "on the degrees of freedom achievable through interference alignment in a mimo interference channel"
    - "a feasibility test for linear interference alignment in mimo channels with constant coefficients"
    - "settling the feasibility of interference alignment for the mimo interference channel the symmetric square case"
    - "mimo interference alignment over correlated channels with imperfect csi"
    - "cooperative algorithms for mimo interference channels"
    - "on feasibility of interference alignment in mimo interference networks"
    - "miso capacity with per antenna power constraint"
    - "interference alignment with analog channel state feedback"

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)