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: "large system analysis of joint channel and data estimation for mimo ds cdma systems"
  Abstract: This paper presents a large-system analysis of the performance of joint channel estimation, multiuser detection, and per-user decoding (CE-MUDD) for randomly spread multiple-input multiple-output (MIMO) direct-sequence code-division multiple-access (DS-CDMA) systems. A suboptimal receiver based on successive decoding in conjunction with linear minimum mean-squared error (LMMSE) channel estimation is investigated. The replica method, developed in statistical mechanics, is used to evaluate the performance in the large-system limit, where the number of users and the spreading factor tend to infinity while their ratio and the number of transmit and receive antennas are kept constant. Joint CE-MUDD based on LMMSE channel estimation is compared to several methods of one-shot channel estimation, i.e., methods that do not utilize decoded data symbols to refine the initial channel estimates, in terms of spectral efficiency. Joint CE-MUDD is found to significantly reduce the rate loss caused by transmission of pilot signals when compared to the receivers based on one-shot channel estimation. This holds particularly for multiple-antenna systems. As a result, joint CE-MUDD can provide significant performance gains compared to the receivers based on one-shot channel estimation.

Connected through hyperedge HE-1 (induced by source paper "asymptotic optimality of massive mimo systems using densely spaced transmit antennas"):
  with members:
    - "blind pilot decontamination"
    - "large system analysis of correlated mimo multiple access channels with arbitrary signaling in the presence of interference"
    - "scaling up mimo opportunities and challenges with very large arrays"
    - "on an achievable rate of large rayleigh block fading mimo channels with no csi"
    - "a deterministic equivalent for the analysis of correlated mimo multiple access channels"
    - "asymptotic analysis of general multiuser detectors in mimo ds cdma channels"
    - "vector precoding for wireless mimo systems and its replica analysis"
    - "analysis of cdma systems that are characterized by eigenvalue spectrum"

Connected through hyperedge HE-2 (induced by source paper "iterative lmmse channel estimation multiuser detection and decoding via spatial coupling"):
  with members:
    - "a generalization of threshold saturation application to spatially coupled bicm id"
    - "accelerating iterative detection for spatially coupled systems by collaborative training"
    - "approaching the rate distortion limit with spatial coupling belief propagation and decimation"
    - "iterative multiuser detection and decoding with spatially coupled interleaving"
    - "on an achievable rate of large rayleigh block fading mimo channels with no csi"
    - "thresholds of spatially coupled systems via lyapunov s method"
    - "a simple proof of threshold saturation for coupled scalar recursions"
    - "a phenomenological study on threshold improvement via spatial coupling"

Connected through hyperedge HE-3 (induced by source paper "uplink linear receivers for multi cell multiuser mimo with pilot contamination large system analysis"):
  with members:
    - "blind pilot decontamination"
    - "scaling up mimo opportunities and challenges with very large arrays"
    - "on capacity of large scale mimo multiple access channels with distributed sets of correlated antennas"
    - "cellular systems with many antennas large system analysis under pilot contamination"
    - "achieving massive mimo spectral efficiency with a not so large number of antennas"
    - "energy and spectral efficiency of very large multiuser mimo systems"
    - "pilot contamination and precoding in multi cell tdd systems"

Connected through hyperedge HE-4 (induced by source paper "on an achievable rate of large rayleigh block fading mimo channels with no csi"):
  with members:
    - "on the capacity of large mimo block fading channels"
    - "optimization of sequences in cdma systems a statistical mechanics approach"
    - "microscopic analysis for decoupling principle of linear vector channel"
    - "asymptotic analysis of general multiuser detectors in mimo ds cdma channels"
    - "on the capacity and energy efficiency of training based transmissions over fading channels"
    - "analysis of cdma systems that are characterized by eigenvalue spectrum"
    - "randomly spread cdma asymptotics via statistical physics"

Connected through hyperedge HE-5 (induced by source paper "statistical mechanics approach to sparse noise denoising"):
  with members:
    - "support recovery with sparsely sampled free random matrices"
    - "typical l 1 recovery limit of sparse vectors represented by concatenations of random orthogonal matrices"
    - "asymptotic analysis of map estimation via the replica method and applications to compressed sensing"
    - "a typical reconstruction limit of compressed sensing based on lp norm minimization"
    - "randomly spread cdma asymptotics via statistical physics"

Connected through hyperedge HE-6 (induced by source paper "large system analysis of joint user selection and vector precoding for multiuser mimo downlink"):
  with members:
    - "a greedy algorithm of data dependent user selection for fast fading gaussian vector broadcast channels"
    - "sum rates rate allocation and user scheduling for multi user mimo vector perturbation precoding"
    - "tight bounds on the capacity of binary input random cdma systems"
    - "asymptotic analysis of general multiuser detectors in mimo ds cdma channels"
    - "vector precoding for wireless mimo systems and its replica analysis"
    - "analysis of cdma systems that are characterized by eigenvalue spectrum"
    - "randomly spread cdma asymptotics via statistical physics"

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)