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: "what is the value of joint processing of pilots and data in block fading channels"
  Abstract: The spectral efficiency achievable with joint processing of pilot and data symbol observations is compared with that achievable through the conventional (separate) approach of first estimating the channel on the basis of the pilot symbols alone, and subsequently detecting the data symbols. Studied on the basis of a mutual information lower bound, joint processing is found to provide a non-negligible advantage relative to separate processing, particularly for fast fading. It is shown that, regardless of the fading rate, only a very small number of pilot symbols (at most one per transmit antenna and per channel coherence interval) should be transmitted if joint processing is allowed.

Connected through hyperedge HE-1 (induced by source paper "a data aided channel estimation scheme for decoupled systems in heterogeneous networks"):
  with members:
    - "performance impact of los and nlos transmissions in dense cellular networks"
    - "why to decouple the uplink and downlink in cellular networks and how to do it"
    - "analysis of the decoupled access for downlink and uplink in wireless heterogeneous networks"
    - "joint rate and sinr coverage analysis for decoupled uplink downlink biased cell associations in hetnets"
    - "what will 5g be"
    - "massive mimo meets hetnet interference coordination through spatial blanking"
    - "downlink and uplink decoupling a disruptive architectural design for 5g networks"
    - "load backhaul aware decoupled downlink uplink access in 5g systems"

Connected through hyperedge HE-2 (induced by source paper "a simple capacity lower bound for communication with superimposed pilots"):
  with members:
    - "superimposed pilots are superior for mitigating pilot contamination in massive mimo"
    - "a rate splitting approach to fading channels with imperfect channel state information"
    - "nearest neighbour decoding and pilot aided channel estimation in stationary gaussian flat fading channels"
    - "the noncoherent rician fading channel part i structure of the capacity achieving input"

Connected through hyperedge HE-3 (induced by source paper "finite blocklength bounds on the maximum coding rate of rician fading channels with applications to pilot assisted transmission"):
  with members:
    - "short packet communications over multiple antenna rayleigh fading channels"
    - "the third order term in the normal approximation for the awgn channel"
    - "finite snr bounds on the sum rate capacity of rayleigh block fading multiple access channels with no a priori csi"
    - "on the capacity of large mimo block fading channels"

Connected through hyperedge HE-4 (induced by source paper "massive mimo with low resolution adcs"):
  with members:
    - "channel estimation and performance analysis of one bit massive mimo systems"
    - "uplink performance of wideband massive mimo with one bit adcs"
    - "bayes optimal joint channel and data estimation for massive mimo with low precision adcs"
    - "mixed adc massive mimo"
    - "channel estimation and uplink achievable rates in one bit massive mimo systems"
    - "short packet communications over multiple antenna rayleigh fading channels"
    - "mixed adc massive mimo detectors performance analysis and design optimization"
    - "quantized precoding for massive mu mimo"

Connected through hyperedge HE-5 (induced by source paper "one bit massive mimo channel estimation and high order modulations"):
  with members:
    - "capacity analysis of one bit quantized mimo systems with transmitter channel state information"
    - "joint channel and data estimation for large mimo systems with low precision adcs"
    - "finite snr bounds on the sum rate capacity of rayleigh block fading multiple access channels with no a priori csi"
    - "massive mimo with 1 bit adc"
    - "at low snr asymmetric quantizers are better"
    - "on the gain of joint processing of pilot and data symbols in stationary rayleigh fading channels"
    - "mutual information of iid complex gaussian signals on block rayleigh faded channels"
    - "increased capacity per unit cost by oversampling"

Connected through hyperedge HE-6 (induced by source paper "secrecy sum rates with regularized channel inversion precoding under imperfect csi at the transmitter"):
  with members:
    - "principles of physical layer security in multiuser wireless networks a survey"
    - "secrecy sum rates for multi user mimo regularized channel inversion precoding"
    - "large system analysis of linear precoding in correlated miso broadcast channels under limited feedback"
    - "secure transmission with multiple antennas ii the mimome wiretap channel"
    - "discrete memoryless interference and broadcast channels with confidential messages secrecy rate regions"
    - "multiuser mimo achievable rates with downlink training and channel state feedback"
    - "secrecy capacity region of a multi antenna gaussian broadcast channel with confidential messages"
    - "mimo broadcast channels with finite rate feedback"

Connected through hyperedge HE-7 (induced by source paper "large system analysis of linear precoding in correlated miso broadcast channels under limited feedback"):
  with members:
    - "mimo interference alignment over correlated channels with imperfect csi"
    - "massive mimo how many antennas do we need"
    - "a deterministic equivalent for the analysis of correlated mimo multiple access channels"
    - "channel estimation and linear precoding in multiuser multiple antenna tdd systems"
    - "base station cooperation on the downlink large system analysis"
    - "optimized training and feedback for mimo downlink channels"
    - "multiuser mimo achievable rates with downlink training and channel state feedback"
    - "mimo broadcast channels with finite rate feedback"

Connected through hyperedge HE-8 (induced by source paper "on the gain of joint processing of pilot and data symbols in stationary rayleigh fading channels"):
  with members:
    - "mutual information of iid complex gaussian signals on block rayleigh faded channels"
    - "low snr capacity of noncoherent fading channels"
    - "capacity results for block stationary gaussian fading channels with a peak power constraint"

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)