Search Results for author: Robert Caiming Qiu

Found 17 papers, 4 papers with code

Design and Prototyping of Transmissive RIS-Aided Wireless Communication

no code implementations8 Feb 2024 Jianan Zhang, Rujing Xiong, Junshuo Liu, Tiebin Mi, Robert Caiming Qiu

Reconfigurable Intelligent Surfaces (RISs) exhibit promising enhancements in coverage and data rates for wireless communication systems, particularly in the context of 5G and beyond.

Wireless Regional Imaging through Reconfigurable Intelligent Surfaces: Passive Mode

no code implementations19 Nov 2023 Fuhai Wang, Chun Wang, Rujing Xiong, Zhengyu Wang, Tiebin Mi, Robert Caiming Qiu

In this paper, we propose a multi-RIS-aided wireless imaging framework in 3D facing the distributed placement of multi-sensor networks.

Wireless Communications in Cavity: A Reconfigurable Boundary Modulation based Approach

no code implementations15 Nov 2023 Xuehui Dong, Xiang Ren, Bokai Lai, Rujing Xiong, Tiebin Mi, Robert Caiming Qiu

This paper explores the potential wireless communication applications of Reconfigurable Intelligent Surfaces (RIS) in reverberant wave propagation environments.

Position

Fair Beam Allocations through Reconfigurable Intelligent Surfaces

no code implementations24 Oct 2023 Rujing Xiong, Ke Yin, Tiebin Mi, Jialong Lu, Kai Wan, Robert Caiming Qiu

This framework focuses on designing explicit beamforming functionalities through optimization.

Design of Reconfigurable Intelligent Surfaces for Wireless Communication: A Review

no code implementations27 Apr 2023 Rujing Xiong, Jianan Zhang, Fuhai Wang, Zhengyu Wang, Xiang Ren, Junshuo Liu, Jialong Lu, Kai Wan, Tiebin Mi, Robert Caiming Qiu

The prototype undergoes rigorous empirical evaluation, encompassing multi-hop RIS signal amplification, image reconstruction, and real-world indoor signal coverage experiments.

Image Reconstruction

Transforming RIS-Assisted Passive Beamforming from Tedious to Simple: A Relaxation Algorithm for Rician Channel

1 code implementation12 Nov 2022 Xuehui Dong, Rujing Xiong, Tiebin Mi, Yuan Xie, Robert Caiming Qiu

This paper investigates the problem of maximizing the signal-to-noise ratio (SNR) in reconfigurable intelligent surface (RIS)-assisted MISO communication systems.

Optimal Discrete Beamforming of RIS-Aided Wireless Communications: An Inner Product Maximization Approach

no code implementations8 Nov 2022 Rujing Xiong, Xuihui Dong, Tiebin Mi, Kai Wan, Robert Caiming Qiu

Leveraging the inherent structure of this problem, we propose an efficient divide-and-sort (DaS) search algorithm to reach the global optimality for the maximization problem.

Combinatorial Optimization Quantization

Joint Beamforming Design and 3D DoA Estimation for RIS-aided Communication System

no code implementations3 Nov 2022 Zhengyu Wang, Wei Yang, Tiebin Mi, Robert Caiming Qiu

To overcome the mutually coupled problem between the beamforming design at the RIS and DoA estimation, we explore the separable sparse representation structure and propose an alternating optimization algorithm.

RIS-aided Wireless Communication with $1$-bit Discrete Optimization for Signal Enhancement

1 code implementation12 Sep 2022 Rujing Xiong, Xuehui Dong, Tiebin Mi, Robert Caiming Qiu

In recent years, a brand-new technology, reconfigurable intelligent surface (RIS) has been widely studied for reconfiguring the wireless propagation environment.

Towards Analytical Electromagnetic Models for Reconfigurable Intelligent Surfaces

1 code implementation8 Aug 2022 Tiebin Mi, Jianan Zhang, Rujing Xiong, Zhengyu Wang, Robert Caiming Qiu

The proposed models are employed to identify the advantages and limitations of three typical configurations.

LEMO: Learn to Equalize for MIMO-OFDM Systems with Low-Resolution ADCs

no code implementations14 May 2019 Lei Chu, Ling Pei, Husheng Li, Robert Caiming Qiu

This paper develops a new deep neural network optimized equalization framework for massive multiple input multiple output orthogonal frequency division multiplexing (MIMOOFDM) systems that employ low-resolution analog-to-digital converters (ADCs) at the base station (BS).

A Random Matrix Theoretical Approach to Early Event Detection in Smart Grid

no code implementations31 Jan 2015 Xing He, Robert Caiming Qiu, Qian Ai, Yinshuang Cao, Jie Gu, Zhijian Jin

With the statistical procedure, the proposed method is universal and fast; moreover, it is robust against traditional EED challenges (such as error accumulations, spurious correlations, and even bad data in core area).

Anomaly Detection Decision Making +1

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