Search Results for author: Lingyang Song

Found 26 papers, 1 papers with code

Reconfigurable Holographic Surface: A New Paradigm to Implement Holographic Radio

no code implementations28 Dec 2022 Ruoqi Deng, Yutong Zhang, Haobo Zhang, Boya Di, Hongliang Zhang, Lingyang Song

Ultra-massive multiple-input multiple-output (MIMO) is one of the key enablers in the forthcoming 6G networks to provide high-speed data services by exploiting spatial diversity.

Holographic Integrated Sensing and Communications: Principles, Technology, and Implementation

no code implementations16 Nov 2022 Haobo Zhang, Hongliang Zhang, Boya Di, Lingyang Song

We first introduce the hardware structure and working principle of the RHS and then propose a novel holographic beamforming scheme for ISAC.

Meta-material Sensor Based Internet of Things: Design, Optimization, and Implementation

no code implementations26 Jun 2022 Jingzhi Hu, Hongliang Zhang, Boya Di, Zhu Han, H. Vincent Poor, Lingyang Song

However, to maximize the sensing accuracy, the structures of meta-IoT sensors need to be optimized considering their joint influence on sensing and transmission, which is challenging due to the high computational complexity in evaluating the influence, especially given a large number of sensors.

MetaRadar: Multi-target Detection for Reconfigurable Intelligent Surface Aided Radar Systems

no code implementations25 Feb 2022 Haobo Zhang, Hongliang Zhang, Boya Di, Kaigui Bian, Zhu Han, Lingyang Song

To address this issue, we propose to use the reconfigurable intelligent surface (RIS) to improve the detection accuracy of radar systems due to its capability to customize channel conditions by adjusting its phase shifts, which is referred to as MetaRadar.

Reconfigurable Holographic Surfaces for Future Wireless Communications

no code implementations13 Dec 2021 Ruoqi Deng, Boya Di, Hongliang Zhang, Dusit Niyato, Zhu Han, H. Vincent Poor, Lingyang Song

Future wireless communications look forward to constructing a ubiquitous intelligent information network with high data rates through cost-efficient devices.

MetaSketch: Wireless Semantic Segmentation by Metamaterial Surfaces

no code implementations14 Aug 2021 Jingzhi Hu, Hongliang Zhang, Kaigui Bian, Zhu Han, H. Vincent Poor, Lingyang Song

Semantic segmentation is a process of partitioning an image into multiple segments for recognizing humans and objects, which can be widely applied in scenarios such as healthcare and safety monitoring.

Compressive Sensing Object Recognition +1

Simultaneously Transmitting and Reflecting (STAR) Intelligent Omni-Surfaces, Their Modeling and Implementation

no code implementations13 Aug 2021 Jiaqi Xu, Yuanwei Liu, Xidong Mu, Joey Tianyi Zhou, Lingyang Song, H. Vincent Poor, Lajos Hanzo

With the rapid development of advanced electromagnetic manipulation technologies, researchers and engineers are starting to study smart surfaces that can achieve enhanced coverages, high reconfigurability, and are easy to deploy.

Integrated Satellite-HAP-Terrestrial Networks for Dual-Band Connectivity

no code implementations6 Jul 2021 Wenwei Zhang, Ruoqi Deng, Boya Di, Lingyang Song

The recent development of high-altitude platforms (HAPs) has attracted increasing attention since they can serve as a promising communication method to assist satellite-terrestrial networks.

Meta-material Sensors based Internet of Things for 6G Communications

no code implementations3 Jul 2021 Jingzhi Hu, Hongliang Zhang, Boya Di, Kaigui Bian, Lingyang Song

In the coming 6G communications, the internet of things (IoT) serves as a key enabler to collect environmental information and is expected to achieve ubiquitous deployment.

Deployment Optimization for Meta-material Based Internet of Things

no code implementations3 Jul 2021 Xu Liu, Jingzhi Hu, Hongliang Zhang, Boya Di, Lingyang Song

It is a challenge to optimize the positions of the Meta-IoT devices to ensure sensing accuracy of 3D environmental conditions.

Spatial Equalization Before Reception: Reconfigurable Intelligent Surfaces for Multi-path Mitigation

no code implementations8 Mar 2021 Hongliang Zhang, Lingyang Song, Zhu Han, H. Vincent Poor

Reconfigurable intelligent surfaces (RISs), which enable tunable anomalous reflection, have appeared as a promising method to enhance wireless systems.

Information Theory Information Theory

MetaSensing: Intelligent Metasurface Assisted RF 3D Sensing by Deep Reinforcement Learning

no code implementations25 Nov 2020 Jingzhi Hu, Hongliang Zhang, Kaigui Bian, Marco Di Renzo, Zhu Han, Lingyang Song

To tackle this challenge, we formulate an optimization problem for minimizing the cross-entropy loss of the sensing outcome, and propose a deep reinforcement learning algorithm to jointly compute the optimal beamformer patterns and the mapping of the received signals.

reinforcement-learning Reinforcement Learning (RL)

MetaLocalization: Reconfigurable Intelligent Surface Aided Multi-user Wireless Indoor Localization

no code implementations18 Nov 2020 Haobo Zhang, Hongliang Zhang, Boya Di, Kaigui Bian, Zhu Han, Lingyang Song

As the RIS is able to customize the radio channels by adjusting the phase shifts of the signals reflected at the surface, the localization accuracy in the RIS aided scheme can be improved by choosing the proper phase shifts with significant differences of RSS values among adjacent locations.

Indoor Localization

Intelligent Omni-Surface: Ubiquitous Wireless Transmission by Reflective-Transmissive Metasurface

no code implementations2 Nov 2020 Shuhang Zhang, Hongliang Zhang, Boya Di, Yunhua Tan, Marco Di Renzo, Zhu Han, H. Vincent Poor, Lingyang Song

Intelligent reflecting surface (IRS), which is capable to adjust propagation conditions by controlling phase shifts of the reflected waves that impinge on the surface, has been widely analyzed for enhancing the performance of wireless systems.

Beyond Intelligent Reflecting Surfaces: Reflective-Transmissive Metasurface Aided Communications for Full-dimensional Coverage Extension

no code implementations15 Sep 2020 Shuhang Zhang, Hongliang Zhang, Boya Di, Yunhua Tan, Zhu Han, Lingyang Song

In this paper, we study an intelligent omni-surface (IOS)-assisted downlink communication system, where the link quality of a mobile user (MU) can be improved with a proper IOS phase shift design.

Signal Processing

Sense-Store-Send: Trajectory Optimization for a Buffer-aided Internet of UAVs

no code implementations15 Sep 2020 Yujie Jin, Hongliang Zhang, Shuhang Zhang, Zhu Han, Lingyang Song

To minimize the overall completion time for all the sensing tasks, we formulate a joint trajectory, sensing location, and sensing time optimization problem.

On Spatial Multiplexing Using Reconfigurable Intelligent Surfaces

no code implementations15 Sep 2020 Mohamed A. ElMossallamy, Hongliang Zhang, Radwa Sultan, Karim G. Seddik, Lingyang Song, Geoffery Ye Li, Zhu Han

We consider an uplink multi-user scenario and investigate the use of reconfigurable intelligent surfaces (RIS) to optimize spatial multiplexing performance when a linear receiver is used.

MetaRadar: Indoor Localization by Reconfigurable Metamaterials

no code implementations6 Aug 2020 Haobo Zhang, Jingzhi Hu, Hongliang Zhang, Boya Di, Kaigui Bian, Zhu Han, Lingyang Song

However, in MetaRadar, it is challenging to build radio maps for all the radio environments generated by metamaterial units and select suitable maps from all the possible maps to realize a high accuracy localization.

Indoor Localization

Cooperative Internet of UAVs: Distributed Trajectory Design by Multi-agent Deep Reinforcement Learning

no code implementations28 Jul 2020 Jingzhi Hu, Hongliang Zhang, Lingyang Song, Robert Schober, H. Vincent Poor

In this paper, we consider a cellular Internet of UAVs, where the UAVs execute sensing tasks through cooperative sensing and transmission to minimize the age of information (AoI).

reinforcement-learning Reinforcement Learning (RL)

Towards Ubiquitous Positioning by Leveraging Reconfigurable Intelligent Surface

no code implementations10 Jul 2020 Haobo Zhang, Hongliang Zhang, Boya Di, Kaigui Bian, Zhu Han, Lingyang Song

The received signal strength (RSS) based technique is widely utilized for ubiquitous positioning due to its advantage of simple implementability.

Reconfigurable Intelligent Surface (RIS)-Enhanced Two-Way OFDM Communications

no code implementations5 May 2020 Chandan Pradhan, Ang Li, Lingyang Song, Jun Li, Branka Vucetic, Yonghui Li

In this paper, we focus on the reconfigurable intelligent surface (RIS)-enhanced two-way device-to-device (D2D) multi-pair orthogonal-frequency-division-multiplexing (OFDM) communication systems.

Reconfigurable Intelligent Surfaces for Wireless Communications: Principles, Challenges, and Opportunities

no code implementations2 May 2020 Mohamed A. ElMossallamy, Hongliang Zhang, Lingyang Song, Karim G. Seddik, Zhu Han, Geoffrey Ye Li

Recently there has been a flurry of research on the use of reconfigurable intelligent surfaces (RIS) in wireless networks to create smart radio environments.

Deep Learning for Ultra-Reliable and Low-Latency Communications in 6G Networks

no code implementations22 Feb 2020 Changyang She, Rui Dong, Zhouyou Gu, Zhanwei Hou, Yonghui Li, Wibowo Hardjawana, Chenyang Yang, Lingyang Song, Branka Vucetic

In this article, we first summarize how to apply data-driven supervised deep learning and deep reinforcement learning in URLLC, and discuss some open problems of these methods.

Edge-computing Federated Learning +1

ImgSensingNet: UAV Vision Guided Aerial-Ground Air Quality Sensing System

no code implementations27 May 2019 Yuzhe Yang, Zhiwen Hu, Kaigui Bian, Lingyang Song

Given the increasingly serious air pollution problem, the monitoring of air quality index (AQI) in urban areas has drawn considerable attention.

Device-to-Device Load Balancing for Cellular Networks

1 code implementation7 Oct 2017 Lei Deng, Yinghui He, Ying Zhang, Minghua Chen, Zongpeng Li, Jack Y. B. Lee, Ying Jun Zhang, Lingyang Song

The idea is to shift traffic from a congested cell to its adjacent under-utilized cells by leveraging inter-cell D2D communication, so that the traffic can be served without using extra spectrum, effectively improving the spectrum temporal efficiency.

Networking and Internet Architecture

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