Search Results for author: Wanli Ni

Found 17 papers, 1 papers with code

Federated Contrastive Learning for Personalized Semantic Communication

no code implementations13 Jun 2024 Yining Wang, Wanli Ni, Wenqiang Yi, Xiaodong Xu, Ping Zhang, Arumugam Nallanathan

Simulation results verify the superiority of the proposed FedCL framework compared to other distributed learning benchmarks in terms of task performance and robustness under different numbers of clients and channel conditions, especially in low signal-to-noise ratio and highly heterogeneous data scenarios.

Contrastive Learning Decoder +1

From Single to Multi-Functional RIS: Architecture, Key Technologies, Challenges, and Applications

no code implementations25 May 2024 Wanli Ni, Ailing Zheng, Wen Wang, Dusit Niyato, Naofal Al-Dhahir, Merouane Debbah

Although reconfigurable intelligent surfaces (RISs) have demonstrated the potential to boost network capacity and expand coverage by adjusting their electromagnetic properties, existing RIS architectures have certain limitations, such as double-fading attenuation and restricted half-space coverage.

Multi-Objective Optimization-Based Waveform Design for Multi-User and Multi-Target MIMO-ISAC Systems

no code implementations22 May 2024 Peng Wang, Dongsheng Han, Yashuai Cao, Wanli Ni, Dusit Niyato

In this paper, we investigate the waveform design problem in a downlink multi-user and multi-target ISAC system under different C&S performance preferences.

Multi-Objective Optimization-based Transmit Beamforming for Multi-Target and Multi-User MIMO-ISAC Systems

no code implementations15 May 2024 Chunwei Meng, Zhiqing Wei, Dingyou Ma, Wanli Ni, Liyan Su, Zhiyong Feng

To achieve the Pareto boundary, the max-min system utility function method is employed, while considering the fairness between communication users and radar targets.

Fairness

OFDM-Based Digital Semantic Communication with Importance Awareness

no code implementations4 Jan 2024 Chuanhong Liu, Caili Guo, Yang Yang, Wanli Ni, Tony Q. S. Quek

Based on semantic importance, we formulate a sub-carrier and bit allocation problem to maximize communication performance.

Semantic Communication

Semi-Federated Learning: Convergence Analysis and Optimization of A Hybrid Learning Framework

no code implementations4 Oct 2023 Jingheng Zheng, Wanli Ni, Hui Tian, Deniz Gunduz, Tony Q. S. Quek, Zhu Han

To tackle this issue, we propose a semi-federated learning (SemiFL) paradigm to leverage the computing capabilities of both the BS and devices for a hybrid implementation of centralized learning (CL) and FL.

Federated Learning

Performance Analysis and Optimization of Reconfigurable Multi-Functional Surface Assisted Wireless Communications

no code implementations4 Oct 2023 Wen Wang, Wanli Ni, Hui Tian, Naofal Al-Dhahir

To realize a self-sustainable communication system, we investigate the use of MF-RIS in improving the sum-rate of multi-user wireless networks.

Multi-Functional Reconfigurable Intelligent Surface: System Modeling and Performance Optimization

no code implementations4 Oct 2023 Wen Wang, Wanli Ni, Hui Tian, Yonina C. Eldar, Rui Zhang

In this paper, we propose and study a multi-functional reconfigurable intelligent surface (MF-RIS) architecture.

Explainable Semantic Communication for Text Tasks

no code implementations22 Mar 2023 Chuanhong Liu, Caili Guo, Yang Yang, Wanli Ni, Yanquan Zhou, Lei LI, Tony Q. S. Quek

In this paper, we propose a triplet-based explainable semantic communication (TESC) scheme for representing text semantics efficiently.

Question Answering Semantic Communication +3

Semi-Federated Learning for Collaborative Intelligence in Massive IoT Networks

1 code implementation9 Mar 2023 Wanli Ni, Jingheng Zheng, Hui Tian

Implementing existing federated learning in massive Internet of Things (IoT) networks faces critical challenges such as imbalanced and statistically heterogeneous data and device diversity.

Diversity Federated Learning

Balancing Accuracy and Integrity for Reconfigurable Intelligent Surface-aided Over-the-Air Federated Learning

no code implementations17 Jul 2022 Jingheng Zheng, Hui Tian, Wanli Ni, Wei Ni, Ping Zhang

Under perfect channel state information (CSI), the new framework minimizes the aggregated model's distortion and retains the local models' recoverability by optimizing the transmit beamformers of the devices, the receive beamformers of the BS, and the RIS configuration in an alternating manner.

Federated Learning Robust Design

Safeguarding NOMA Networks via Reconfigurable Dual-Functional Surface under Imperfect CSI

no code implementations29 May 2022 Wen Wang, Wanli Ni, Hui Tian, Zhaohui Yang, Chongwen Huang, Kai-Kit Wong

This paper investigates the use of the reconfigurable dual-functional surface to guarantee the full-space secure transmission in non-orthogonal multiple access (NOMA) networks.

Towards Communication-Learning Trade-off for Federated Learning at the Network Edge

no code implementations27 May 2022 Jianyang Ren, Wanli Ni, Hui Tian

In this letter, we study a wireless federated learning (FL) system where network pruning is applied to local users with limited resources.

Federated Learning Network Pruning

Research on Resource Allocation for Efficient Federated Learning

no code implementations19 Apr 2021 Jianyang Ren, Wanli Ni, Gaofeng Nie, Hui Tian

In this framework, we minimize the weighted sum of system cost and learning cost by optimizing bandwidth, computing frequency, power allocation and subcarrier assignment.

Edge-computing Federated Learning

Intelligent Reflecting Surface Aided Multi-Cell NOMA Networks

no code implementations7 Dec 2020 Wanli Ni, Xiao Liu, Yuanwei Liu, Hui Tian, Yue Chen

This paper proposes a novel framework of resource allocation in intelligent reflecting surface (IRS) aided multi-cell non-orthogonal multiple access (NOMA) networks, where a sum-rate maximization problem is formulated.

Federated Learning in Multi-RIS Aided Systems

no code implementations26 Oct 2020 Wanli Ni, Yuanwei Liu, Zhaohui Yang, Hui Tian, Xuemin Shen

This paper investigates the problem of model aggregation in federated learning systems aided by multiple reconfigurable intelligent surfaces (RISs).

Information Theory Signal Processing Information Theory

Resource Allocation for Multi-Cell IRS-Aided NOMA Networks

no code implementations21 Jun 2020 Wanli Ni, Xiao Liu, Yuanwei Liu, Hui Tian, Yue Chen

This paper proposes a novel framework of resource allocation in multi-cell intelligent reflecting surface (IRS) aided non-orthogonal multiple access (NOMA) networks, where an IRS is deployed to enhance the wireless service.

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