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: "low complexity end to end performance optimization in mimo full duplex relay systems"
  Abstract: In this paper, we deal with the deployment of full-duplex relaying in amplify-and-forward (AF) cooperative networks with multiple-antenna terminals. In contrast to previous studies, which focus on the spatial mitigation of the loopback interference (LI) at the relay node, a joint precoding/decoding design that maximizes the end-to-end (e2e) performance is investigated. The proposed precoding incorporates rank-1 zero-forcing (ZF) LI suppression at the relay node and is derived in closed-form by solving appropriate optimization problems. In order to further reduce system complexity, the antenna selection (AS) problem for full-duplex AF cooperative systems is discussed. We investigate different AS schemes to select a single transmit antenna at both the source and the relay, as well as a single receive antenna at both the relay and the destination. To facilitate comparison, exact outage probability expressions and asymptotic approximations of the proposed AS schemes are provided. In order to overcome zero-diversity effects associated with the AS operation, a simple power allocation scheme at the relay node is also investigated and its optimal value is analytically derived. Numerical and simulation results show that the joint ZF-based precoding significantly improves e2e performance, while AS schemes are efficient solutions for scenarios with strict computational constraints.

Connected through hyperedge HE-1 (induced by source paper "robust transceiver design for full duplex decode and forward relay assisted mimo systems"):
  with members:
    - "state space adaptive nonlinear self interference cancellation for full duplex communication"
    - "all digital self interference cancellation technique for full duplex systems"
    - "capacity of the gaussian two hop full duplex relay channel with residual self interference"
    - "multipair full duplex relaying with massive arrays and linear processing"
    - "passive self interference suppression for full duplex infrastructure nodes"
    - "design and characterization of a full duplex multiantenna system for wifi networks"
    - "understanding the impact of phase noise on active cancellation in wireless full duplex"

Connected through hyperedge HE-2 (induced by source paper "robust transceiver design for mimo decode and forward full duplex relay"):
  with members:
    - "state space adaptive nonlinear self interference cancellation for full duplex communication"
    - "all digital self interference cancellation technique for full duplex systems"
    - "multipair full duplex relaying with massive arrays and linear processing"
    - "passive self interference suppression for full duplex infrastructure nodes"
    - "design and characterization of a full duplex multiantenna system for wifi networks"
    - "understanding the impact of phase noise on active cancellation in wireless full duplex"

Connected through hyperedge HE-3 (induced by source paper "antenna selection in full duplex cooperative noma systems"):
  with members:
    - "exploiting full half duplex user relaying in noma systems"
    - "full duplex multi antenna relay assisted cooperative non orthogonal multiple access"
    - "a survey on non orthogonal multiple access for 5g networks research challenges and future trends"
    - "joint beamforming design and power allocation for full duplex noma cognitive relay systems"
    - "antenna selection for mimo noma networks"
    - "experiment driven characterization of full duplex wireless systems"
    - "a quantitative measure of fairness and discrimination for resource allocation in shared computer systems"

Connected through hyperedge HE-4 (induced by source paper "multi antenna wireless legitimate surveillance systems design and performance analysis"):
  with members:
    - "secure massive mimo systems with limited rf chains"
    - "analysis and design of secure massive mimo systems in the presence of hardware impairments"
    - "on secrecy performance of antenna selection aided mimo systems against eavesdropping"
    - "linear precoding of data and artificial noise in secure massive mimo systems"
    - "throughput analysis and optimization of wireless powered multiple antenna full duplex relay systems"
    - "wireless information surveillance via proactive eavesdropping with spoofing relay"
    - "a survey on wireless security technical challenges recent advances and future trends"
    - "proactive eavesdropping via cognitive jamming in fading channels"

Connected through hyperedge HE-5 (induced by source paper "beamforming optimization for full duplex wireless powered mimo systems"):
  with members:
    - "throughput analysis and optimization of wireless powered multiple antenna full duplex relay systems"
    - "on the performance of multi antenna wireless powered communications with energy beamforming"
    - "wireless powered communication networks an overview"
    - "communications and signals design for wireless power transmission"
    - "weighted sum transmit power minimization for full duplex system with swipt and self energy recycling"
    - "multipair full duplex relaying with massive arrays and linear processing"
    - "optimal resource allocation in full duplex wireless powered communication network"
    - "wireless networks with rf energy harvesting a contemporary survey"

Connected through hyperedge HE-6 (induced by source paper "achievable rates of buffer aided full duplex gaussian relay channels"):
  with members:
    - "throughput analysis and optimization of wireless powered multiple antenna full duplex relay systems"
    - "capacity of the gaussian two hop full duplex relay channel with residual self interference"
    - "widely linear digital self interference cancellation in direct conversion full duplex transceiver"
    - "design and characterization of a full duplex multiantenna system for wifi networks"
    - "wireless information and power transfer with full duplex relaying"
    - "full duplex transceiver system calculations analysis of adc and linearity challenges"
    - "low complexity hybrid precoding in massive multiuser mimo systems"
    - "experiment driven characterization of full duplex wireless systems"

Connected through hyperedge HE-7 (induced by source paper "full duplex multi antenna relay assisted cooperative non orthogonal multiple access"):
  with members:
    - "relay selection for cooperative noma"
    - "throughput analysis and optimization of wireless powered multiple antenna full duplex relay systems"
    - "multipair full duplex relaying with massive arrays and linear processing"
    - "in band full duplex wireless challenges and opportunities"
    - "experiment driven characterization of full duplex wireless systems"

Connected through hyperedge HE-8 (induced by source paper "technical report outage performance of full duplex mimo df relaying using zero forcing beamforming"):
  with members:
    - "joint beamforming optimization and power control for full duplex mimo two way relay channel"
    - "performance analysis of optimal single stream beamforming in mimo dual hop af systems"
    - "mimo two way relay channel diversity multiplexing tradeoff analysis"

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)