no code implementations • 28 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.
no code implementations • 28 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.
no code implementations • 24 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.
no code implementations • 14 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.
no code implementations • 22 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.
no code implementations • 14 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.
no code implementations • 26 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.
no code implementations • 22 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.
no code implementations • 12 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.
no code implementations • 28 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.
no code implementations • 20 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.
no code implementations • 16 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.
no code implementations • 20 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.
no code implementations • 13 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.
no code implementations • 20 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.
no code implementations • 21 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.
no code implementations • 26 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.
no code implementations • 18 Oct 2023 • Yang Li, Jiting Cao, Yan Xu, Lipeng Zhu, Zhao Yang Dong
This work proposes a Transformer-based STVSA method to address this challenge.
no code implementations • 17 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.
no code implementations • 16 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.
no code implementations • 23 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.
no code implementations • 12 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.
no code implementations • 19 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.
no code implementations • 5 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.
no code implementations • 3 May 2020 • Lipeng Zhu, David J. Hill
Afterwards, TS subsequences contaminated with bad PMU data are identified by characterizing anomalous STNNs.