no code implementations • 6 Sep 2024 • Haolong Chen, Hanzhi Chen, Zijian Zhao, Kaifeng Han, Guangxu Zhu, Yichen Zhao, Ying Du, Wei Xu, Qingjiang Shi
The impressive performance of ChatGPT and other foundation-model-based products in human language understanding has prompted both academia and industry to explore how these models can be tailored for specific industries and application scenarios.
no code implementations • 14 Aug 2024 • Zhixing Chen, Zhaoyu Fan, Yang Li, Yibin Kang, Qi Yan, Qingjiang Shi
However, characterizing the CSE is intractable due to the inherent complexity of the CoMP channel model and the diversity of the 5G dynamic network environment, which poses a great challenge for CSE prediction in real-world 5G CoMP systems.
no code implementations • 13 Jun 2024 • TingWei Chen, Yantao Wang, Hanzhi Chen, Zijian Zhao, Xinhao Li, Nicola Piovesan, Guangxu Zhu, Qingjiang Shi
The introduction of fifth-generation (5G) radio technology has revolutionized communications, bringing unprecedented automation, capacity, connectivity, and ultra-fast, reliable communications.
no code implementations • 6 May 2024 • Lunchen Xie, Eugenio Lomurno, Matteo Gambella, Danilo Ardagna, Manuel Roveri, Matteo Matteucci, Qingjiang Shi
Accurate classification of medical images is essential for modern diagnostics.
no code implementations • 28 Feb 2024 • Xi Wang, Xiaotong Zhao, Juncheng Wang, You Li, Qingjiang Shi
We then propose a joint beamforming and linear stream allocation algorithm, termed as RWMMSE-LSA, which yields closed-form updates with linear stream allocation complexity and is guaranteed to converge to the stationary points of the original joint optimization problem.
no code implementations • 27 Dec 2023 • Yunxin Li, Fan Liu, Zhen Du, Weijie Yuan, Qingjiang Shi, Christos Masouros
In this study, we propose novel frame structures that incorporate ISAC signals for three crucial stages in the NR-V2X system: initial access, connected mode, and beam failure and recovery.
no code implementations • 15 Oct 2023 • Zhongxiang Wei, Ping Wang, Qingjiang Shi, Xu Zhu, Christos Masouros
This requires multistage optimization for full resource domain dynamic programming.
no code implementations • 22 May 2023 • Xiaotong Zhao, Mian Li, Bo wang, Enbin Song, Tsung-Hui Chang, Qingjiang Shi
However, current detection methods tailored to DBP only consider ideal white Gaussian noise scenarios, while in practice, the noise is often colored due to interference from neighboring cells.
no code implementations • 27 Apr 2023 • Xin Guan, Zhixing Chen, Yibin Kang, Qingjiang Shi
In this paper, we investigate the scheduling problem of a fixed wireless access (FWA) network using only statistical CSI.
no code implementations • 4 Mar 2023 • Shutao Zhang, Xinzhi Ning, Xi Zheng, Qingjiang Shi, Tsung-Hui Chang, Zhi-Quan Luo
Localized channel modeling is crucial for offline performance optimization of 5G cellular networks, but the existing channel models are for general scenarios and do not capture local geographical structures.
1 code implementation • 8 Jan 2023 • Yanmeng Wang, Qingjiang Shi, Tsung-Hui Chang
In view of this, we develop a new FL algorithm that is tailored to BN, called FedTAN, which is capable of achieving robust FL performance under a variety of data distributions via iterative layer-wise parameter aggregation.
1 code implementation • 14 Dec 2022 • Yunqi Wang, Yang Li, Qingjiang Shi, Yik-Chung Wu
In order to achieve high data rate and ubiquitous connectivity in future wireless networks, a key task is to efficiently manage the radio resource by judicious beamforming and power allocation.
no code implementations • 13 Dec 2022 • Hanning Tang, Liusha Yang, Rui Zhou, Jing Liang, Hong Wei, Xuan Wang, Qingjiang Shi, Zhi-Quan Luo
Using artificial intelligent (AI) to re-design and enhance the current wireless communication system is a promising pathway for the future sixth-generation (6G) wireless network.
no code implementations • 23 Nov 2022 • Yunqi Wang, Yang Li, Qingjiang Shi, Yik-Chung Wu
However, the current GNNs are only equipped with the node-update mechanism, which restricts it from modeling more complicated problems such as the cooperative beamforming design, where the beamformers are on the graph edges of wireless networks.
1 code implementation • 12 May 2022 • Xiaotong Zhao, Siyuan Lu, Qingjiang Shi, Zhi-Quan Luo
Precoding design for maximizing weighted sum-rate (WSR) is a fundamental problem for downlink of massive multi-user multiple-input multiple-output (MU-MIMO) systems.
no code implementations • 2 Apr 2022 • Kai Li, Ying Li, Lei Cheng, Qingjiang Shi, Zhi-Quan Luo
The downlink channel covariance matrix (CCM) acquisition is the key step for the practical performance of massive multiple-input and multiple-output (MIMO) systems, including beamforming, channel tracking, and user scheduling.
no code implementations • 23 Jun 2021 • Xiaotong Zhao, Xin Guan, Mian Li, Qingjiang Shi
Conventional uplink equalization in massive MIMO systems relies on a centralized baseband processing architecture.
no code implementations • 17 Jun 2021 • Yanmeng Wang, Yanqing Xu, Qingjiang Shi, Tsung-Hui Chang
Federated learning (FL) has been recognized as a viable distributed learning paradigm which trains a machine learning model collaboratively with massive mobile devices in the wireless edge while protecting user privacy.
no code implementations • 5 Jun 2021 • Yihong Dong, Ying Peng, Muqiao Yang, Songtao Lu, Qingjiang Shi
Deep neural networks have been shown as a class of useful tools for addressing signal recognition issues in recent years, especially for identifying the nonlinear feature structures of signals.
1 code implementation • 12 May 2021 • Lunchen Xie, Jiaqi Liu, Songtao Lu, Tsung-Hui Chang, Qingjiang Shi
XGBoost is one of the most widely used machine learning models in the industry due to its superior learning accuracy and efficiency.
no code implementations • 18 Mar 2021 • Yihong Dong, Lunchen Xie, Qingjiang Shi
While a sufficient optimality condition is available in the literature, there is a lack of \yhedit{a} fast convergent algorithm to achieve stationary points.
no code implementations • 24 Jan 2021 • Lei Cheng, Qingjiang Shi
Channel estimation has long been deemed as one of the most critical problems in three-dimensional (3D) massive multiple-input multiple-output (MIMO), which is recognized as the leading technology that enables 3D spatial signal processing in the fifth-generation (5G) wireless communications and beyond.
no code implementations • 22 Oct 2020 • Kai Li, Ying Li, Lei Cheng, Qingjiang Shi, Zhi-Quan Luo
There is a fundamental trade-off between the channel representation resolution of codebooks and the overheads of feedback communications in the fifth generation new radio (5G NR) frequency division duplex (FDD) massive multiple-input and multiple-output (MIMO) systems.
no code implementations • 20 Sep 2020 • Siyuan Lu, Shengjie Zhao, Qingjiang Shi
Conventional optimization-based iterative resource allocation algorithms often suffer from slow convergence, especially for massive multiple-input-multiple-output (MIMO) beamforming problems.
no code implementations • 5 Sep 2020 • Lei Cheng, Zhongtao Chen, Qingjiang Shi, Yik-Chung Wu, Sergios Theodoridis
However, the optimal determination of a tensor rank is known to be a non-deterministic polynomial-time hard (NP-hard) task.
no code implementations • 5 Sep 2020 • Pei Fang, Zhendong Cai, Hui Chen, QingJiang Shi
Feature engineering is the process of using domain knowledge to extract features from raw data via data mining techniques and is a key step to improve the performance of machine learning algorithms.
no code implementations • 19 Aug 2020 • Lingyun Zhou, Xihan Chen, Mingyi Hong, Shi Jin, Qingjiang Shi
Unmanned aerial vehicle (UAV) swarm has emerged as a promising novel paradigm to achieve better coverage and higher capacity for future wireless network by exploiting the more favorable line-of-sight (LoS) propagation.
1 code implementation • 15 Jun 2020 • Qiyu Hu, Yunlong Cai, Qingjiang Shi, Kaidi Xu, Guanding Yu, Zhi Ding
Then, we implement the proposed deepunfolding framework to solve the sum-rate maximization problem for precoding design in MU-MIMO systems.
1 code implementation • 7 Jun 2020 • Zhiguo Wang, Liusha Yang, Feng Yin, Ke Lin, Qingjiang Shi, Zhi-Quan Luo
In this paper, we find these two methods have complementary properties and larger diversity, which motivates us to propose a new semi-supervised learning method that is able to adaptively combine the strengths of Xgboost and transductive support vector machine.
1 code implementation • 10 Apr 2020 • Yihong Dong, Xiaohan Jiang, Huaji Zhou, Yun Lin, Qingjiang Shi
This paper proposes a ZSL framework, signal recognition and reconstruction convolutional neural networks (SR2CNN), to address relevant problems in this situation.