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: "sum rate maximization for mu miso with partial csit using joint multicasting and broadcasting"
  Abstract: In this paper, we consider a MU-MISO system where users have highly accurate Channel State Information (CSI), while the Base Station (BS) has partial CSI consisting of an imperfect channel estimate and statistical knowledge of the CSI error. With the objective of maximizing the Average Sum Rate (ASR) subject to a power constraint, a special transmission scheme is considered where the BS transmits a common symbol in a multicast fashion, in addition to the conventional private symbols. This scheme is termed Joint Multicasting and Broadcasting (JMB). The ASR problem is transformed into an augmented Average Weighted Sum Mean Square Error (AWSMSE) problem which is solved using Alternating Optimization (AO). The enhanced rate performance accompanied with the incorporation of the multicast part is demonstrated through simulations.

Connected through hyperedge HE-1 (induced by source paper "energy efficient hybrid precoding design for integrated multicast unicast millimeter wave communications with swipt"):
  with members:
    - "hybrid precoding based millimeter wave massive mimo noma with simultaneous wireless information and power transfer"
    - "joint optimization of computation and communication power in multi user massive mimo systems"
    - "energy efficient transceiver design for hybrid sub array architecture mimo systems"
    - "energy efficient power allocation in millimeter wave massive mimo with non orthogonal multiple access"
    - "joint base station clustering and beamforming for non orthogonal multicast and unicast transmission with backhaul constraints"
    - "joint beamforming and broadcasting in massive mimo"
    - "an overview of signal processing techniques for millimeter wave mimo systems"
    - "on the spectral efficiency and security enhancements of noma assisted multicast unicast streaming"

Connected through hyperedge HE-2 (induced by source paper "rate splitting for multi antenna non orthogonal unicast and multicast transmission spectral and energy efficiency analysis"):
  with members:
    - "energy efficiency of rate splitting multiple access and performance benefits over sdma and noma"
    - "rate splitting multiple access for coordinated multi point joint transmission"
    - "rate splitting for multi antenna non orthogonal unicast and multicast transmission"
    - "gaussian message passing for overloaded massive mimo noma"
    - "rate splitting multiple access for downlink communication systems bridging generalizing and outperforming sdma and noma"
    - "rate splitting for max min fair multigroup multicast beamforming in overloaded systems"
    - "optimal dof region of the k user miso bc with partial csit"
    - "generalized multicast multibeam precoding for satellite communications"

Connected through hyperedge HE-3 (induced by source paper "rate splitting for multi antenna non orthogonal unicast and multicast transmission"):
  with members:
    - "rate splitting multiple access for downlink communication systems bridging generalizing and outperforming sdma and noma"
    - "energy efficient joint unicast and multicast beamforming with multi antenna user terminals"
    - "joint base station clustering and beamforming for non orthogonal multicast and unicast transmission with backhaul constraints"
    - "sum rate maximization for linearly precoded downlink multiuser miso systems with partial csit a rate splitting approach"
    - "rate splitting for mimo wireless networks a promising phy layer strategy for lte evolution"

Connected through hyperedge HE-4 (induced by source paper "joint base station clustering and beamforming for non orthogonal multicast and unicast transmission with backhaul constraints"):
  with members:
    - "energy efficient joint unicast and multicast beamforming with multi antenna user terminals"
    - "an efficient global algorithm for single group multicast beamforming"
    - "joint beamforming and broadcasting in massive mimo"
    - "robust transmission in downlink multiuser miso systems a rate splitting approach"
    - "rate splitting for mimo wireless networks a promising phy layer strategy for lte evolution"
    - "content centric sparse multicast beamforming for cache enabled cloud ran"
    - "sparse beamforming and user centric clustering for downlink cloud radio access network"

Connected through hyperedge HE-5 (induced by source paper "sum rate maximization for linearly precoded downlink multiuser miso systems with partial csit a rate splitting approach"):
  with members:
    - "miso networks with imperfect csit a topological rate splitting approach"
    - "robust transmission in downlink multiuser miso systems a rate splitting approach"
    - "a rate splitting strategy for massive mimo with imperfect csit"
    - "rate analysis of two receiver miso broadcast channel with finite rate feedback a rate splitting approach"
    - "achieving max min fairness for mu miso with partial csit a multicast assisted transmission"
    - "optimal multiuser transmit beamforming a difficult problem with a simple solution structure"
    - "ammse optimization for multiuser miso systems with imperfect csit and perfect csir"
    - "transmit designs for the mimo broadcast channel with statistical csi"

Connected through hyperedge HE-6 (induced by source paper "robust transmission in downlink multiuser miso systems a rate splitting approach"):
  with members:
    - "sum rate maximization for linearly precoded downlink multiuser miso systems with partial csit a rate splitting approach"
    - "a rate splitting approach to robust multiuser miso transmission"
    - "a rate splitting strategy for massive mimo with imperfect csit"
    - "rate analysis of two receiver miso broadcast channel with finite rate feedback a rate splitting approach"
    - "achieving max min fairness for mu miso with partial csit a multicast assisted transmission"
    - "aligned image sets under channel uncertainty settling a conjecture by lapidoth shamai and wigger on the collapse of degrees of freedom under finite precision csit"
    - "degrees of freedom of time correlated miso broadcast channel with delayed csit"
    - "linear transceiver design for a mimo interfering broadcast channel achieving max min fairness"

Connected through hyperedge HE-7 (induced by source paper "a rate splitting strategy for massive mimo with imperfect csit"):
  with members:
    - "a hierarchical rate splitting strategy for fdd massive mimo under imperfect csit"
    - "two stage beamformer design for massive mimo downlink by trace quotient formulation"
    - "rate analysis of two receiver miso broadcast channel with finite rate feedback a rate splitting approach"
    - "optimal multiuser transmit beamforming a difficult problem with a simple solution structure"
    - "massive mimo multicasting in noncooperative cellular networks"
    - "massive mimo for next generation wireless systems"
    - "two tier precoding for fdd multi cell massive mimo time varying interference networks"
    - "what will 5g be"

Connected through hyperedge HE-8 (induced by source paper "generalized degrees of freedom of the symmetric k user interference channel under finite precision csit"):
  with members:
    - "real interference alignment exploiting the potential of single antenna systems"
    - "topological interference management through index coding"
    - "aligned image sets under channel uncertainty settling a conjecture by lapidoth shamai and wigger on the collapse of degrees of freedom under finite precision csit"
    - "degrees of freedom region of miso ofdma broadcast channel with imperfect csit"
    - "on the synergistic benefits of alternating csit for the miso bc"
    - "interference alignment from degrees of freedom to constant gap capacity approximations"
    - "ergodic interference alignment"
    - "the degrees of freedom regions of mimo broadcast interference and cognitive radio channels with no csit"

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)