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Channel state information (CSI) feedback is necessary for the frequency division duplexing (FDD) multiple input multiple output (MIMO) systems due to the channel non-reciprocity. With the help of deep learning, many works have succeeded in…

Information Theory · Computer Science 2023-02-07 Zhilin Lu , Xudong Zhang , Rui Zeng , Jintao Wang

A multicarrier-division duplex (MDD)-based cell-free (CF) scheme, namely MDD-CF, is proposed, which enables downlink (DL) data and uplink (UL) data or pilots to be concurrently transmitted on mutually orthogonal subcarriers in distributed…

Information Theory · Computer Science 2022-11-01 Bohan Li , Lie-Liang Yang , Robert G. Maunder , Songlin Sun , Pei Xiao

Stacked intelligent metasurfaces (SIMs) have recently emerged as a key enabler for realizing electromagnetic wave-domain signal processing in next-generation wireless networks. However, practical SIM implementations often suffer from…

Signal Processing · Electrical Eng. & Systems 2026-03-10 Xing Jia , Hao Liu , Haoxian Niu , Jinbao Li , Xiangyu Ding , Lu Gan

The potential advantages of intelligent wireless communications with millimeter wave (mmWave) and massive multiple-input multiple-output (MIMO) are based on the availability of instantaneous channel state information (CSI) at the base…

Information Theory · Computer Science 2022-11-03 Yibin Zhang , Jinlong Sun , Guan Gui , Yun Lin , Haris Gacanin , Hikmet Sari , Fumiyuki Adachi

The full-duplex (FD) communication can achieve higher spectrum efficiency than conventional half-duplex (HD) communication; however, self-interference (SI) is the key hurdle. This paper is the first work to propose the intelligent Omni…

Information Theory · Computer Science 2022-08-22 Sisai Fang , Gaojie Chen , Pei Xiao , Kai-Kit Wong , Rahim Tafazolli

The increasing demand for communication is degrading the electromagnetic (EM) transmission environment due to severe EM interference, significantly reducing the efficiency of the radio frequency (RF) spectrum. Metasurfaces, a promising…

Information Theory · Computer Science 2024-06-27 Kaining Wang , Bo Yang , Zhiwen Yu , Xuelin Cao , Mérouane Debbah , Chau Yuen

Cell-free (CF) massive multiple-input multiple-output (MIMO) and reconfigurable intelligent surface (RIS) are two promising technologies for realizing future beyond-fifth generation (B5G) networks. In this paper, we consider a practical…

Information Theory · Computer Science 2023-06-16 Enyu Shi , Jiayi Zhang , Derrick Wing Kwan Ng , Bo Ai

Millimeter wave (mmWave) full-duplex (FD) is a promising technique for improving capacity by maximizing the utilization of both time and the rich mmWave frequency resources. Still, it has restrictions due to FD self-interference (SI) and…

Information Theory · Computer Science 2023-03-28 Songjie Yang , Wanting Lyu , Yunis Xanthos , Zhongpei Zhang , Chadi Assi , Chau Yuen

In recent years, the end-to-end (E2E) scheme based on deep learning (DL) has been proposed as a potential scheme to jointly optimize the encoder and the decoder parameters of the optical communication system. Compared with conventional deep…

Signal Processing · Electrical Eng. & Systems 2023-05-30 Jiayu Zheng , Tianhong Zhang , Yu Wenjing , Weiqin Zhou , Chuanchuan Yang , Fan Zhang

The spatial covariance matrix has been considered to be significant for beamformers. Standing upon the intersection of traditional beamformers and deep neural networks, we propose a causal neural beamformer paradigm called Embedding and…

Sound · Computer Science 2021-09-03 Andong Li , Wenzhe Liu , Chengshi Zheng , Xiaodong Li

Full duplex (FD) systems suffer from very high hardware cost and high power consumption to mitigate the self-interference (SI) in the analog domain. Moreover, in millimeter wave (mmWave) they rely on hybrid beamforming (HYBF) as a signal…

Information Theory · Computer Science 2023-06-16 Chandan Kumar Sheemar , Stefano Tomasin , Dirk Slock , Symeon Chatzinotas

In this paper, we propose an end-to-end deep learning-based joint transceiver design algorithm for millimeter wave (mmWave) massive multiple-input multiple-output (MIMO) systems, which consists of deep neural network (DNN)-aided pilot…

Information Theory · Computer Science 2021-10-27 Qiyu Hu , Yunlong Cai , Kai Kang , Guanding Yu , Jakob Hoydis , Yonina C. Eldar

Accurate precoding in massive multiple-input multiple-output (MIMO) frequency-division duplexing (FDD) systems relies on efficient channel state information (CSI) acquisition. End-to-end learning frameworks improve performance by jointly…

Signal Processing · Electrical Eng. & Systems 2026-01-15 Weibo Wen , Shijian Gao , Haotian Zhang , Xiang Cheng , Liuqing Yang

This study employs a uniform rectangular array (URA) sub-connected hybrid beamforming (SC-HBF) architecture to provide a novel self-interference (SI) suppression scheme in a full-duplex (FD) massive multiple-input multiple-output (mMIMO)…

Information Theory · Computer Science 2024-02-14 Mobeen Mahmood , Yuanxing Zhang , Robert Morawski , Tho Le-Ngoc

This work considers a reconfigurable intelligent surface (RIS)-aided cell-free massive multiple-input multiple-output (MIMO) system with RIS spatial correlation and electromagnetic interference (EMI). We propose a two-phase channel…

Information Theory · Computer Science 2024-11-18 Jun Qian , Chi Zhang , Khaled B. Letaief , Ross Murch

To enable larger apertures in multipleinput multipleoutput MIMO systems the trihybrid MIMO architecture offers a promising lowcost and lowpower solution by introducing reconfigurable antennas as a third layer of precoding on top of…

This paper outlines a new approach to designing tunable electromagnetic (EM) graphene-based metasurfaces using convolutional neural networks (CNNs). EM metasurfaces have previously been used to manipulate EM waves by adjusting the local…

Applied Physics · Physics 2023-07-21 Mehdi Kiani , Mahsa Zolfaghari , Jalal Kiani

This paper presents an in-band Full Duplex (FD) integrated sensing and communications system comprising a holographic Multiple-Input Multiple-Output (MIMO) base station, which is capable to simultaneously communicate with multiple users in…

Information Theory · Computer Science 2023-08-08 Ioannis Gavras , Md Atiqul Islam , Besma Smida , George C. Alexandropoulos

We present the concept, theoretical model and experimental implementation of a full-duplex nonreciprocal-beam-steering transmissive phase-gradient metasurface. Such a metasurface is realized by exploiting the unique properties of the…

Applied Physics · Physics 2020-07-15 Sajjad Taravati , George V. Eleftheriades

Reconfigurable Intelligent Surfaces (RISs) are one of the key emerging 6th Generation (6G) technologies that are expected to improve the link budgets between transmitters and receivers by adding artificial propagation paths. In such…

Information Theory · Computer Science 2022-09-30 Yi Yu , Rita Ibrahim , Dinh-Thuy Phan-Huy