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A cell-free network merged with active reconfigurable reflecting surfaces (RIS) is investigated in this paper. Based on the imperfect channel state information (CSI), the aggregated channel from the user to the access point (AP) is…

Signal Processing · Electrical Eng. & Systems 2024-02-23 Mahdi Eskandari , Huiling Zhu , Jiangzhou Wang

This paper establishes the theoretical limits of channel state information (CSI) feedback in frequency-division duplexing (FDD) multi-antenna orthogonal frequency-division multiplexing (OFDM) systems under finite-length training with…

Information Theory · Computer Science 2026-02-09 Shuao Chen , Junyuan Gao , Yuxuan Shi , Yongpeng Wu , Giuseppe Caire , H. Vincent Poor , Wenjun Zhang

Theoretically, full-duplex (FD) communications can double the spectral-efficiency (SE) of a wireless link if the problem of self-interference (SI) is completely eliminated. Recent developments towards SI cancellation techniques have allowed…

Signal Processing · Electrical Eng. & Systems 2018-03-02 Animesh Yadav , Georgios I. Tsiropoulos , Octavia A. Dobre

Relay systems improve both coverage and system capacity. Towards this direction, full-duplex (FD) technology, being able to boost the spectral efficiency by transmitting and receiving simultaneously on the same frequency and time resources,…

Information Theory · Computer Science 2018-06-15 Anastasios Papazafeiropoulos , Tharmalingam Ratnarajah

Full-duplex communication systems have the potential to achieve significantly higher data rates and lower latency compared to their half-duplex counterparts. This advantage stems from their ability to transmit and receive data…

Signal Processing · Electrical Eng. & Systems 2023-08-14 Jungyeon Kim , Hyowon Lee , Heedong Do , Jinseok Choi , Jeonghun Park , Wonjae Shin , Yonina C. Eldar , Namyoon Lee

Rate-Splitting Multiple Access (RSMA) is an emerging flexible, robust and powerful multiple access scheme for downlink multi-antenna wireless networks. RSMA relies on multi-antenna Rate-Splitting (RS) strategies at the transmitter and…

Information Theory · Computer Science 2020-07-21 Onur Dizdar , Yijie Mao , Wei Han , Bruno Clerckx

While the robustness of rate-splitting multiple access (RSMA) to imperfect channel state information (CSI) is well-documented, its susceptibility to attacks launched with malicious reconfigurable intelligent surfaces (RISs) remains…

Signal Processing · Electrical Eng. & Systems 2024-08-26 A. S. de Sena , A. Gomes , J. Kibiłda , N. H. Mahmood , L. A. DaSilva , M. Latva-aho

Full-duplex (FD) communications with bidirectional transmitting and receiving at the same time and frequency radio resource have long been deemed a promising way to boost spectrum efficiency, but hindered by the techniques for…

Information Theory · Computer Science 2016-04-12 Rongpeng Li , Yan Chen , Geoffrey Ye Li , Guangyi Liu

In intelligent reflecting surface (IRS) aided wireless communication systems, channel state information (CSI) is crucial to achieve its promising passive beamforming gains. However, CSI errors are inevitable in practice and generally…

Information Theory · Computer Science 2022-10-17 Ming-Min Zhao , An Liu , Rui Zhang

The performance of a multiuser communication system with single-antenna transmitting terminals and a multi-antenna base-station receiver is analytically investigated. The system operates under independent and non-identically distributed…

Information Theory · Computer Science 2016-10-27 Nikolaos I. Miridakis , Theodoros A. Tsiftsis , Corbett Rowell

We use stochastic network calculus to investigate the delay performance of a multiuser MISO system with zero-forcing beamforming. First, we consider ideal assumptions with long codewords and perfect CSI at the transmitter, where we observe…

Information Theory · Computer Science 2018-06-27 Sebastian Schiessl , James Gross , Mikael Skoglund , Giuseppe Caire

In this paper, we study Full Duplex (FD) Multiple-Input Multiple-Output (MIMO) radios for simultaneous data communication and control information exchange. Capitalizing on a recently proposed FD MIMO architecture combining digital transmit…

Information Theory · Computer Science 2020-03-17 Md Atiqul Islam , George C. Alexandropoulos , Besma Smida

Full-duplex (FD) technology is gaining popularity for integration into a wide range of wireless networks due to its demonstrated potential in recent studies. In contrast to half-duplex (HD) technology, the implementation of FD in networks…

Networking and Internet Architecture · Computer Science 2024-02-09 Yonghwi Kim , Hyung-Joo Moon , Hanju Yoo , Byoungnam , Kim , Kai-Kit Wong , Chan-Byoung Chae

High-mobility scenarios are becoming increasingly critical in next-generation communication systems. While multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) stands as a prominent technology, its…

Signal Processing · Electrical Eng. & Systems 2025-12-22 Hengyu Zhang , Xuehan Wang , Xu Shi , Jintao Wang , Zhaohui Yang

A cooperative full duplex (FD) non-orthogonal multiple access (NOMA) scheme over Rician fading channels is considered. To be practical, imperfect successive interference cancellation (ipSIC) and residual hardware impairments (RHIs) at…

Information Theory · Computer Science 2021-07-07 Chao Deng , Meng Liu , Xingwang Li , Yuanwei Liu

An essential step for achieving multiplexing gain in MIMO downlink systems is to collect accurate channel state information (CSI) from the users. Traditionally, CSIs have to be collected before any data can be transmitted. Such a sequential…

Networking and Internet Architecture · Computer Science 2017-06-01 Zhenzhi Qian , Fei Wu , Zizhan Zheng , Kannan Srinivasan , Ness B. Shroff

Compared with traditional half-duplex wireless systems, the application of emerging full-duplex (FD) technology can potentially double the system capacity theoretically. However, conventional techniques for suppressing self-interference…

Information Theory · Computer Science 2023-06-27 Chi Qiu , Meng Hua , Qingqing Wu , Wen Chen , Shaodan Ma , Fen Hou , Derrick Wing Kwan Ng , A. Lee Swindlehurst

Multiuser multiple-input multiple-output wireless communications systems have the potential to satisfy the performance requirements of fifth-generation and future wireless networks. In this context, cell-free (CF) systems, where the…

Information Theory · Computer Science 2021-12-06 André Flores , Rodrigo C. de Lamare , Kumar Vijay Mishra

In this paper, the feasibility of a new downlink transmission mode in massive multi-input multi-output (MIMO) systems is investigated with two types of users, i.e., the users with only statistical channel state information (CSI) and the…

Information Theory · Computer Science 2017-12-01 Shuang Qiu , Da Chen , Daiming Qu , Kai Luo , Tao Jiang

We consider a multiuser (MU) multiple-input multiple-output (MIMO) time-division duplexing (TDD) system in which the base station (BS) is equipped with a large number of antennas for communicating with single-antenna mobile users. In such a…

Information Theory · Computer Science 2013-12-05 Ko-Feng Chen , Yen-Cheng Liu , Yu T. Su