Search Results for author: Rang Liu

Found 25 papers, 0 papers with code

End-to-End Learning for SLP-Based ISAC Systems

no code implementations11 Jan 2024 Yixian Zheng, Rang Liu, Ming Li, Qian Liu

Integrated sensing and communication (ISAC) is an encouraging wireless technology which can simultaneously perform both radar and communication functionalities by sharing the same transmit waveform, spectral resource, and hardware platform.

A Practical Beamforming Design for Active RIS-assisted MU-MISO Systems

no code implementations8 Jan 2024 Yun Yang, Zhiping Lu, Ming Li, Rang Liu, Qian Liu

Motivated by this fact, in this paper we first investigate the amplification principle of typical active RIS and propose a more accurate amplification model based on amplifier hardware characteristics.

Joint Sensing and Communication Optimization in Target-Mounted STARS-Assisted Vehicular Networks: A MADRL Approach

no code implementations17 Nov 2023 Haocheng Zhang, Rang Liu, Ming Li, Wei Wang, Qian Liu

Extensive experimental results confirm the effectiveness of our proposed MADRL framework in improving both sensing and communication performance through the utilization of target-mounted STARS.

Decision Making

Cramer-Rao Bound Optimization for Active RIS-Empowered ISAC Systems

no code implementations17 Sep 2023 Qi Zhu, Ming Li, Rang Liu, Qian Liu

Integrated sensing and communication (ISAC), which simultaneously performs sensing and communication functions within a shared frequency band and hardware platform, has emerged as a promising technology for future wireless systems.

A Novel Joint Angle-Range-Velocity Estimation Method for MIMO-OFDM ISAC Systems

no code implementations7 Aug 2023 Zichao Xiao, Rang Liu, Ming Li, Qian Liu

Therefore, the proposed joint estimation algorithm can achieve larger processing gains and higher resolution by fully exploiting echo signals and jointly estimating the angle-range-velocity information.

Low-Range-Sidelobe Waveform Design for MIMO-OFDM ISAC Systems

no code implementations30 May 2023 Peishi Li, Zichao Xiao, Ming Li, Rang Liu, Qian Liu

Integrated sensing and communication (ISAC) is a promising technology in future wireless systems owing to its efficient hardware and spectrum utilization.

RIS-Aided Integrated Sensing and Communication: Joint Beamforming and Reflection Design

no code implementations22 Feb 2023 Honghao Luo, Rang Liu, Ming Li, Qian Liu

Integrated sensing and communication (ISAC) has been envisioned as a promising technique to alleviate the spectrum congestion problem.

Joint Transceiver Beamforming and Reflecting Design for Active RIS-Aided ISAC Systems

no code implementations21 Feb 2023 Qi Zhu, Ming Li, Rang Liu, Qian Liu

Integrated sensing and communication (ISAC) is recognized as a promising technology with great potential in saving hardware and spectrum resources, since it simultaneously realizes radar detection and user communication functions in the fully-shared platform.

SNR/CRB-Constrained Joint Beamforming and Reflection Designs for RIS-ISAC Systems

no code implementations26 Jan 2023 Rang Liu, Ming Li, Qian Liu, A. Lee Swindlehurst

Two optimization problems are formulated for maximizing the achievable sum-rate of the multi-user communications under an SNR constraint for target detection or a CRB constraint for parameter estimation, the transmit power budget, and the unit-modulus constraint of the RIS reflection coefficients.

Joint Secure Transmit Beamforming Designs for Integrated Sensing and Communication Systems

no code implementations1 Dec 2022 Jinjin Chu, Rang Liu, Ming Li, Yang Liu, Qian Liu

Integrated sensing and communication (ISAC), which allows individual radar and communication systems to share the same spectrum bands, is an emerging and promising technique for alleviating spectrum congestion problems.

End-to-End Learning for Symbol-Level Precoding and Detection with Adaptive Modulation

no code implementations25 Oct 2022 Rang Liu, Zhu Bo, Ming Li, Qian Liu

To overcome the performance bottleneck of these approaches, in this letter we propose an end-to-end learning based approach to jointly optimize the modulation orders, the transmit precoding and the receive detection for an SLP communication system.

Joint Beamforming Designs for Active Reconfigurable Intelligent Surface: A Sub-Connected Array Architecture

no code implementations5 Oct 2022 Qi Zhu, Ming Li, Rang Liu, Yang Liu, Qian Liu

Affected by the "double fading" effect, however, conventional passive RIS cannot bring considerable performance improvement when users are not close enough to RIS.

User Association and Hybrid Beamforming Designs for Cooperative mmWave MIMO Systems

no code implementations10 Aug 2022 Pengfei Ni, Rang Liu, Ming Li, Qian Liu

In an effort to further exploit multiple-antenna diversities, we also consider the dynamic subarray architecture and propose a novel antenna design algorithm for the analog beamforming design.

Partially Distributed Beamforming Design for RIS-Aided Cell-Free Networks

no code implementations10 Aug 2022 Pengfei Ni, Ming Li, Rang Liu, Qian Liu

Cell-free networks are regarded as a promising technology to meet higher rate requirements for beyond fifth-generation (5G) communications.

Joint Beamforming Design for RIS-Assisted Integrated Sensing and Communication Systems

no code implementations3 Aug 2022 Honghao Luo, Rang Liu, Ming Li, Yang Liu, Qian Liu

Integrated sensing and communication (ISAC) has been envisioned as a promising technology to tackle the spectrum congestion problem for future networks.

Integrated Sensing and Communication with Reconfigurable Intelligent Surfaces: Opportunities, Applications, and Future Directions

no code implementations17 Jun 2022 Rang Liu, Ming Li, Honghao Luo, Qian Liu, A. Lee Swindlehurst

Integrated sensing and communication (ISAC) is emerging as a key enabler to address the growing spectrum congestion problem and satisfy increasing demands for ubiquitous sensing and communication.

IRS-assisted Multi-cell Multi-band Systems: Practical Reflection Model and Joint Beamforming Design

no code implementations13 Apr 2022 Wenhao Cai, Rang Liu, Ming Li, Yang Liu, Qingqing Wu, Qian Liu

Intelligent reflecting surface (IRS) has been regarded as a promising and revolutionary technology for future wireless communication systems owing to its capability of tailoring signal propagation environment in an energy/spectrum/hardware-efficient manner.

Joint Beamforming and Reflection Design for RIS-assisted ISAC Systems

no code implementations1 Mar 2022 Rang Liu, Ming Li, A. Lee Swindlehurst

In this paper, we investigate the potential of employing reconfigurable intelligent surface (RIS) in integrated sensing and communication (ISAC) systems.

Joint Transmit Waveform and Passive Beamforming Design for RIS-Aided DFRC Systems

no code implementations16 Dec 2021 Rang Liu, Ming Li, Yang Liu, Qingqing Wu, Qian Liu

Reconfigurable intelligent surface (RIS) is a promising technology for 6G networks owing to its superior ability to enhance the capacity and coverage of wireless communications by smartly creating a favorable propagation environment.

Dual-Functional Radar-Communication Waveform Design: A Symbol-Level Precoding Approach

no code implementations11 Aug 2021 Rang Liu, Ming Li, Qian Liu, A. Lee Swindlehurst

In this paper, we consider multi-input multi-output (MIMO) DFRC systems and focus on transmit beamforming designs to provide both radar sensing and multi-user communications.

Reflection and Relay Dual-Functional RIS Assisted MU-MISO Systems

no code implementations24 Jul 2021 Yanan Ma, Rang Liu, Yang Liu, Ming Li, Qian Liu

Reconfigurable intelligent surfaces (RISs) have been deemed as one of potential components of future wireless communication systems because they can adaptively manipulate the wireless propagation environment with low-cost passive devices.

BS-RIS-User Association and Beamforming Designs for RIS-aided Cellular Networks

no code implementations27 Jun 2021 Sifan Liu, Pengfei Ni, Rang Liu, Yang Liu, Ming Li, Qian Liu

During the dynamical access process, an iterative algorithm is proposed to alternatively obtain the active and passive beamforming.

Intelligent reflecting surface assisted multi-cell multi-band wireless networks

no code implementations5 Jan 2021 Wenhao Cai, Rang Liu, Yang Liu, Ming Li, Qian Liu

Therefore, the practical phase shift model, which can describe the difference of IRS phase shift responses for the signals with different frequencies, should be utilized in the IRS optimization for wideband and multi-band systems.

Intelligent Reflecting Surface based Passive Information Transmission: A Symbol-Level Precoding Approach

no code implementations29 Jul 2020 Rang Liu, Ming Li, Qian Liu, A. Lee Swindlehurst, Qingqing Wu

Intelligent reflecting surfaces (IRS) have been proposed as a revolutionary technology owing to its capability of adaptively reconfiguring the propagation environment in a cost-effective and hardware-efficient fashion.

Symbol-Level Precoding Design for Intelligent Reflecting Surface Assisted Multi-user MIMO Systems

no code implementations3 Sep 2019 Rang Liu, Hongyu Li, Ming Li, Qian Liu

In this paper we investigate the problem of precoder design for a low-resolution IRS-based transmitter to implement multi-user MISO/MIMO wireless communications.

Quantization

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