Search Results for author: Lipeng Zhu

Found 25 papers, 0 papers with code

Movable Antenna Aided Multiuser Communications: Antenna Position Optimization Based on Statistical Channel Information

no code implementations28 Feb 2025 Ge Yan, Lipeng Zhu, Rui Zhang

To address this issue, we propose in this paper a new approach to optimize the MA positions based on the users' statistical CSI over a large timescale.

Position

A Demo of Radar Sensing Aided Rotatable Antenna for Wireless Communication System

no code implementations28 Feb 2025 Qi Dai, Beixiong Zheng, Qiyao Wang, Xue Xiong, Xiaodan Shao, Lipeng Zhu, Rui Zhang

Rotatable antenna (RA) represents a novel antenna architecture that enhances wireless communication system performance by independently or collectively adjusting each antenna's boresight/orientation.

Rotatable Antenna Enabled Wireless Communication System with Visual Recognition: A Prototype Implementation

no code implementations24 Feb 2025 Liang Dai, Beixiong Zheng, Yanhua Tan, Lipeng Zhu, Fangjiong Chen, Rui Zhang

In this demonstration, we present a prototype of the RA-enabled wireless communication system with a visual recognition module to evaluate the performance gains provided by the RA in practical environments.

Movable Antenna Enhanced DF and AF Relaying Systems: Performance Analysis and Optimization

no code implementations14 Jan 2025 Nianzu Li, Weidong Mei, Peiran Wu, Boyu Ning, Lipeng Zhu

For the AF relaying system, our objective is to maximize the achievable rate by jointly optimizing the two-stage MA positions as well as the AF beamforming matrix at the relay, which results in a more challenging optimization problem due to the intricate coupling variables.

Position

6DMA-Aided Hybrid Beamforming with Joint Antenna Position and Orientation Optimization

no code implementations22 Dec 2024 Yichi Zhang, Yuchen Zhang, Lipeng Zhu, Sa Xiao, Wanbin Tang, Yonina C. Eldar, Rui Zhang

This paper studies a sub-connected six-dimensional movable antenna (6DMA)-aided multi-user communication system.

Position

6D Movable Antenna Enhanced Multi-Access Point Coordination via Position and Orientation Optimization

no code implementations14 Dec 2024 Xiangyu Pi, Lipeng Zhu, Haobin Mao, Zhenyu Xiao, Xiang-Gen Xia, Rui Zhang

Then, an optimization problem is formulated to maximize the weighted sum rate of multiple UTs for their uplink transmissions by jointly optimizing the antenna position vector (APV), the antenna orientation matrix (AOM), and the receive combining matrix over all coordinated APs, subject to the constraints on local antenna movement regions.

Position

Multi-IRS Enhanced Wireless Coverage: Deployment Optimization Based on Large-Scale Channel Knowledge

no code implementations26 Oct 2024 Min Fu, Lipeng Zhu, Rui Zhang

Then, we derive the average channel power gains from the BS to IRS in each candidate site and from this IRS to any grid in the target area in terms of IRS deployment parameters, including its size, position, height, and orientation.

Combinatorial Optimization

Codebook Design and Performance Analysis for Wideband Beamforming in Terahertz Communications

no code implementations22 Oct 2024 Boyu Ning, Weidong Mei, Lipeng Zhu, Zhi Chen, Rui Zhang

Based on this metric, a wideband analog beamforming codebook design problem is formulated for optimally balancing the beamforming gains in both the spatial and frequency domains, and the performance loss of conventional narrowband beamforming in wideband systems is analyzed.

Sum Rate Maximization for Movable Antenna Enhanced Multiuser Covert Communications

no code implementations12 Oct 2024 Haobin Mao, Xiangyu Pi, Lipeng Zhu, Zhenyu Xiao, Xiang-Gen Xia, Rui Zhang

To maximize the sum rate of users under covertness constraint, we formulate an optimization problem to jointly design the transmit beamforming and the positions of MAs at the AP.

Position

Channel Estimation for Movable Antenna Aided Wideband Communication Systems

no code implementations28 Sep 2024 Zhenyu Xiao, Songqi Cao, Lipeng Zhu, Boyu Ning, Xiang-Gen Xia, Rui Zhang

To start with, we express the CFRs as a combination of the field-response vectors (FRVs), delay-response vector (DRV), and path-response tensor (PRT), which exhibit sparse characteristics and can be recovered by using a limited number of channel measurements at selected position pairs of Tx and Rx MAs over a few subcarriers.

compressed sensing Position

6D Movable Antenna Enhanced Interference Mitigation for Cellular-Connected UAV Communications

no code implementations20 Sep 2024 Tianshi Ren, Xianchao Zhang, Lipeng Zhu, Wenyan Ma, Xiaozheng Gao, Rui Zhang

Cellular-connected unmanned aerial vehicle (UAV) communications is an enabling technology to transmit control signaling or payload data for UAVs through cellular networks.

Position

Over-the-Air Computation via 2D Movable Antenna Array

no code implementations16 Sep 2024 Nianzu Li, Peiran Wu, Boyu Ning, Lipeng Zhu, Weidong Mei

In this letter, we advance its application for over-the-air computation (AirComp) network, where an access point is equipped with a two-dimensional (2D) MA array to aggregate wireless data from massive users.

Position

Near-Field Multiuser Communications Aided by Movable Antennas

no code implementations20 Aug 2024 Jingze Ding, Lipeng Zhu, Zijian Zhou, Bingli Jiao, Rui Zhang

This letter investigates movable antenna (MA)-aided downlink (DL) multiuser communication systems under the near-field channel condition, where both the base station (BS) and the users are equipped with MAs to fully exploit the degrees of freedom (DoFs) in antenna position optimization.

Position

Sum Rate Maximization for Movable Antenna Enabled Uplink NOMA

no code implementations13 Aug 2024 Nianzu Li, Peiran Wu, Boyu Ning, Lipeng Zhu

Next, we derive the closed-form optimal solution of the decoding order and power control subproblem.

Position

Power Measurement Enabled Channel Autocorrelation Matrix Estimation for IRS-Assisted Wireless Communication

no code implementations20 Jul 2024 Ge Yan, Lipeng Zhu, Rui Zhang

Prior works on IRS CSI acquisition mainly estimate IRS-cascaded channels based on the extra pilot signals received at the users/base station (BS) with time-varying IRS reflections, which, however, needs to modify the existing channel training/estimation protocols of wireless systems.

Quantization

Integrating Base Station with Intelligent Surface for 6G Wireless Networks: Architectures, Design Issues, and Future Directions

no code implementations21 Jun 2024 Yuwei Huang, Lipeng Zhu, Rui Zhang

Intelligent surface (IS) is envisioned as a promising technology for the sixth-generation (6G) wireless networks, which can effectively reconfigure the wireless propagation environment via dynamically controllable signal reflection/transmission.

Make Safe Decisions in Power System: Safe Reinforcement Learning Based Pre-decision Making for Voltage Stability Emergency Control

no code implementations26 May 2024 Congbo Bi, Lipeng Zhu, Di Liu, Chao Lu

The high penetration of renewable energy and power electronic equipment bring significant challenges to the efficient construction of adaptive emergency control strategies against various presumed contingencies in today's power systems.

Active Learning Decision Making +3

Channel Autocorrelation Estimation for IRS-Aided Wireless Communications Based on Power Measurements

no code implementations17 Oct 2023 Ge Yan, Lipeng Zhu, Rui Zhang

Intelligent reflecting surface (IRS) can bring significant performance enhancement for wireless communication systems by reconfiguring wireless channels via passive signal reflection.

Hyperspectral Image Fusion via Logarithmic Low-rank Tensor Ring Decomposition

no code implementations16 Oct 2023 Jun Zhang, Lipeng Zhu, Chao Wang, Shutao Li

On the other hand, the tensor nuclear norm (TNN)-based approaches have recently demonstrated to be more efficient on keeping high-dimensional low-rank structures in tensor recovery.

valid

3-D Positioning and Resource Allocation for Multi-UAV Base Stations Under Blockage-Aware Channel Model

no code implementations23 Nov 2022 Pengfei Yi, Lipeng Zhu, Zhenyu Xiao, Rui Zhang, Zhu Han, Xiang-Gen Xia

Based on the proposed channel model, we formulate the joint optimization problem of UAV three-dimensional (3-D) positioning and resource allocation, by power allocation, user association, and subcarrier allocation, to maximize the minimum achievable rate among users.

Joint 3-D Positioning and Power Allocation for UAV Relay Aided by Geographic Information

no code implementations12 Oct 2021 Pengfei Yi, Liang Zhu, Lipeng Zhu, Zhenyu Xiao, Zhu Han, Xiang-Gen Xia

To improve communication capacity, we first model the blockage effect caused by buildings according to the three-dimensional (3-D) geographic information.

A Survey on Millimeter-Wave Beamforming Enabled UAV Communications and Networking

no code implementations19 Apr 2021 Zhenyu Xiao, Lipeng Zhu, Yanming Liu, Pengfei Yi, Rui Zhang, Xiang-Gen Xia, Robert Schober

The utilization of the millimeter-wave (mmWave) frequency bands is a promising direction for UAV communications, where large antenna arrays can be packed in a small area on the UAV to perform three-dimensional (3D) beamforming.

Data-Driven Short-Term Voltage Stability Assessment Based on Spatial-Temporal Graph Convolutional Network

no code implementations5 Mar 2021 Yonghong Luo, Chao Lu, Lipeng Zhu, Jie Song

The proposed STGCN utilizes graph convolution to integrate network topology information into the learning model to exploit spatial information.

Cost-Effective Bad Synchrophasor Data Detection Based on Unsupervised Time Series Data Analytics

no code implementations3 May 2020 Lipeng Zhu, David J. Hill

Afterwards, TS subsequences contaminated with bad PMU data are identified by characterizing anomalous STNNs.

Time Series Time Series Analysis

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