Search Results for author: Li-Hsiang Shen

Found 15 papers, 0 papers with code

AI-Enabled Unmanned Vehicle-Assisted Reconfigurable Intelligent Surfaces: Deployment, Prototyping, Experiments, and Opportunities

no code implementations6 Nov 2023 Li-Hsiang Shen, Kai-Ten Feng, Ta-Sung Lee, Yuan-Chun Lin, Shih-Cheng Lin, Chia-Chan Chang, Sheng-Fuh Chang

In this article, we have provided some fundamentals of RIS deployment in theory and hardware perspectives as well as utilization of artificial intelligence (AI) and machine learning.

Multi-agent Reinforcement Learning

SALC: Skeleton-Assisted Learning-Based Clustering for Time-Varying Indoor Localization

no code implementations14 Jul 2023 An-Hung Hsiao, Li-Hsiang Shen, Chen-Yi Chang, Chun-Jie Chiu, Kai-Ten Feng

Both simulation and experimental results demonstrate that the proposed SALC system can effectively reconstruct the fingerprint database with an enhanced location estimation accuracy, which outperforms the other existing schemes in the open literature.

Clustering Indoor Localization

Time-Selective RNN for Device-Free Multi-Room Human Presence Detection Using WiFi CSI

no code implementations25 Apr 2023 Li-Hsiang Shen, An-Hung Hsiao, Fang-Yu Chu, Kai-Ten Feng

In this paper, we propose a device-free human presence detection system for multi-room scenarios using a time-selective conditional dual feature extract recurrent network (TCD-FERN).

Blocking

Federated Deep Reinforcement Learning for THz-Beam Search with Limited CSI

no code implementations25 Apr 2023 Po-chun Hsu, Li-Hsiang Shen, Chun-Hung Liu, Kai-Ten Feng

Terahertz (THz) communication with ultra-wide available spectrum is a promising technique that can achieve the stringent requirement of high data rate in the next-generation wireless networks, yet its severe propagation attenuation significantly hinders its implementation in practice.

reinforcement-learning

Attention-based Learning for Sleep Apnea and Limb Movement Detection using Wi-Fi CSI Signals

no code implementations26 Mar 2023 Chi-Che Chang, An-Hung Hsiao, Li-Hsiang Shen, Kai-Ten Feng, Chia-Yu Chen

In this paper, we propose the attention-based learning for sleep apnea and limb movement detection (ALESAL) system that can jointly detect sleep apnea and PLMD under different sleep postures across a variety of patients.

Hierarchical Multi-Agent Multi-Armed Bandit for Resource Allocation in Multi-LEO Satellite Constellation Networks

no code implementations25 Mar 2023 Li-Hsiang Shen, Yun Ho, Kai-Ten Feng, Lie-Liang Yang, Sau-Hsuan Wu, Jen-Ming Wu

Low Earth orbit (LEO) satellite constellation is capable of providing global coverage area with high-rate services in the next sixth-generation (6G) non-terrestrial network (NTN).

Management

A New Paradigm for Device-free Indoor Localization: Deep Learning with Error Vector Spectrum in Wi-Fi Systems

no code implementations25 Mar 2023 Wen Liu, An-Hung Hsiao, Li-Hsiang Shen, Kai-Ten Feng

The demand for device-free indoor localization using commercial Wi-Fi devices has rapidly increased in various fields due to its convenience and versatile applications.

Indoor Localization

Distributed Multi-Agent Deep Q-Learning for Fast Roaming in IEEE 802.11ax Wi-Fi Systems

no code implementations25 Mar 2023 Ting-Hui Wang, Li-Hsiang Shen, Kai-Ten Feng

The innovation of Wi-Fi 6, IEEE 802. 11ax, was be approved as the next sixth-generation (6G) technology of wireless local area networks (WLANs) by improving the fundamental performance of latency, throughput, and so on.

Q-Learning

Intelligent Load Balancing and Resource Allocation in O-RAN: A Multi-Agent Multi-Armed Bandit Approach

no code implementations25 Mar 2023 Chia-Hsiang Lai, Li-Hsiang Shen, Kai-Ten Feng

We have proposed a multi-agent multi-armed bandit for load balancing and resource allocation (mmLBRA) scheme, designed to both achieve load balancing and improve the effective sum-rate performance of the O-RAN network.

BTS: Bifold Teacher-Student in Semi-Supervised Learning for Indoor Two-Room Presence Detection Under Time-Varying CSI

no code implementations21 Dec 2022 Li-Hsiang Shen, Kai-Jui Chen, An-Hung Hsiao, Kai-Ten Feng

Furthermore, BTS outperforms existing SSL-based models in terms of the highest detection accuracy while achieving the asymptotic performance of SL-based methods.

CRONOS: Colorization and Contrastive Learning for Device-Free NLoS Human Presence Detection using Wi-Fi CSI

no code implementations7 Nov 2022 Li-Hsiang Shen, Chia-Che Hsieh, An-Hung Hsiao, Kai-Ten Feng

In this work, we propose a system called CRONOS (Colorization and Contrastive Learning Enhanced NLoS Human Presence Detection), which generates dynamic recurrence plots (RPs) and color-coded CSI ratios to distinguish mobile and stationary people from vacancy in a room, respectively.

Colorization Contrastive Learning +1

Hybrid Controlled User Association and Resource Management for Energy-Efficient Green RANs with Limited Fronthaul

no code implementations7 Dec 2021 Li-Hsiang Shen, Chia-Lin Tsai, Chia-Yu Wang, Kai-Ten Feng

Accordingly, a traffic control-based user association and resource allocation (TURA) scheme is proposed for a centralized resource management.

Management

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