Search Results for author: Zhangjie Peng

Found 10 papers, 0 papers with code

Deep Learning-Based CSI Feedback for RIS-Aided Massive MIMO Systems with Time Correlation

no code implementations19 Mar 2024 Zhangjie Peng, Zhaotian Li, Ruijing Liu, Cunhua Pan, Feiniu Yuan, Jiangzhou Wang

We use long short-term memory to learn time correlation, which can help the neural network to improve the recovery quality of the compressed CSI.

Beamforming Optimization for Active RIS-Aided Multiuser Communications With Hardware Impairments

no code implementations16 Feb 2024 Zhangjie Peng, Zhibo Zhang, Cunhua Pan, Marco Di Renzo, Octavia A. Dobre, Jiangzhou Wang

Specifically, by exploiting the majorization-minimization approach, each subproblem is reformulated into a tractable surrogate problem, whose closed-form solutions are obtained by Lagrange dual decomposition approach and element-wise alternating sequential optimization method.

Energy Minimization for Active RIS-Aided UAV-Enabled SWIPT Systems

no code implementations17 Jun 2023 Zhangjie Peng, Ruijing Liu, Cunhua Pan, Zhenkun Zhang, Jiangzhou Wang

In this paper, we consider an active reconfigurable intelligent surface (RIS)-aided unmanned aerial vehicle(UAV)-enabled simultaneous wireless information and power transfer(SWIPT) system with multiple ground users.

Total Energy

Two-Timescale Transmission Design for Wireless Communication Systems Aided by Active RIS

no code implementations25 Oct 2022 Zhangjie Peng, Tianshu Li, Cunhua Pan, Xianfu Lei, Shi Jin

This paper considers an active reconfigurable intelligent surface (RIS)-aided communication system, where an M-antenna base station (BS) transmits data symbols to a single-antenna user via an N-element active RIS.

Active Reconfigurable Intelligent Surface for Mobile Edge Computing

no code implementations3 Sep 2022 Zhangjie Peng, Ruisong Weng, Zhenkun Zhang, Cunhua Pan, Jiangzhou Wang

This paper investigates an active reconfigurable intelligent surface (RIS)-aided mobile edge computing (MEC) system.

Edge-computing

Energy Minimization in RIS-Assisted UAV-Enabled Wireless Power Transfer Systems

no code implementations18 Aug 2022 Hong Ren, Zhenkun Zhang, Zhangjie Peng, Li Li, Cunhua Pan

Then, we investigate the general scenario in which the RF signals are radiated during the flight, aiming to minimize the total energy consumption of the UAV by jointly optimizing the UAV's trajectory, flight time and the RIS's reflection coefficients.

Total Energy

RIS-Aided D2D Communications Relying on Statistical CSI with Imperfect Hardware

no code implementations4 Dec 2021 Zhangjie Peng, Tianshu Li, Cunhua Pan, Hong Ren, Jiangzhou Wang

In this letter, we investigate a reconfigurable intelligent surfaces (RIS)-aided device to device (D2D) communication system over Rician fading channels with imperfect hardware including both hardware impairment at the transceivers and phase noise at the RISs.

Secure Wireless Communication in RIS-Aided MISO Systems with Hardware Impairments

no code implementations23 Dec 2020 Gui Zhou, Cunhua Pan, Hong Ren, Kezhi Wang, Zhangjie Peng

In this paper, we study the robust transmission design for a reconfigurable intelligent surface (RIS)-aided secure communication system in the presence of transceiver hardware impairments.

Information Theory Signal Processing Information Theory

Analysis and Optimization for RIS-Aided Multi-Pair Communications Relying on Statistical CSI

no code implementations22 Jul 2020 Zhangjie Peng, Tianshu Li, Cunhua Pan, Hong Ren, Wei Xu, Marco Di Renzo

Simulation results verify the correctness of the obtained results and show that the proposed GA method has almost the same performance as the globally optimal solution.

Quantization

Multiuser Full-Duplex Two-Way Communications via Intelligent Reflecting Surface

no code implementations9 Jun 2020 Zhangjie Peng, Zhenkun Zhang, Cunhua Pan, Li Li, A. Lee Swindlehurst

Low-cost passive intelligent reflecting surfaces (IRSs) have recently been envisioned as a revolutionary technology capable of reconfiguring the wireless propagation environment through carefully tuning reflection elements.

Fairness Vocal Bursts Valence Prediction

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