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This paper explores an integrated sensing and communication (ISAC) network empowered by multiple active simultaneously transmitting and reflecting reconfigurable intelligent surfaces (STAR-RISs). A base station (BS) furnishes downlink…

信号处理 · 电气工程与系统科学 2025-07-25 Hyeonho Noh , Hyeonsu Lyu , Hyun Jong Yang

Consider an integrated sensing and communication (ISAC) system where a base station (BS) employs a full-duplex radio to simultaneously serve multiple users and detect a target. The detection performance of the BS may be compromised by…

信号处理 · 电气工程与系统科学 2024-09-16 Shu Cai , Zihao Chen , Ya-Feng Liu , Jun Zhang

We propose a max-min multi-cell aware regularized zero-forcing (Max-Min MCA-RZF) precoding and power allocation scheme for downlink multi-cell massive multiple-input multiple-output (MIMO) systems. A general correlated channel model is…

信息论 · 计算机科学 2017-10-11 Shahram Zarei , Jocelyn Aulin , Wolfgang Gerstacker , Robert Schober

In this paper, we propose a closely spaced multi-antenna system with \textit{passive} self-interference cancellation (\textit{p}-SIC) of $\approx 90$ dB between the transmitter and receiver antenna for full-duplex application. The…

信号处理 · 电气工程与系统科学 2022-10-03 Jogesh Chandra Dash , Debdeep Sarkar

In this paper, the secure performance of multiuser multiple-input single-output wireless communications systems assisted by a multifunctional active intelligent reflection surface (IRS) is investigated. The active IRS can simultaneously…

信号处理 · 电气工程与系统科学 2022-05-06 Shaokang Hu , Derrick Wing Kwan Ng , Jinhong Yuan

Single-antenna full-duplex communication technology has the potential to substantially increase spectral efficiency. However, limited propagation domain cancellation of single-antenna system results in a higher impact of receiver chain…

信号处理 · 电气工程与系统科学 2019-06-19 Md Atiqul Islam , Besma Smida

Media-based modulation (MBM) is a novel modulation technique that can improve the spectral efficiency of the existing wireless systems. In MBM, multiple radio frequency (RF) mirrors are placed near the transmit antenna(s) and are switched…

信息论 · 计算机科学 2021-01-07 Manish Mandloi , Devendra Singh Gurjar

Large language models (LLMs) are increasingly deployed over knowledge bases for efficient knowledge retrieval and question answering. However, LLMs can inadvertently answer beyond a user's permission scope, leaking sensitive content, thus…

计算与语言 · 计算机科学 2026-01-21 Zhaopeng Zhang , Pengcheng Sun , Lan Zhang , Chen Tang , Jiewei Lai , Yunhao Wang , Hui Jin

Massive MIMO is considered a key enabler to support massive machine-type communication (mMTC). While massive access schemes have been extensively analyzed for co-located massive MIMO arrays, this paper explores activity detection in…

信号处理 · 电气工程与系统科学 2025-03-14 Ali Elkeshawy , Haifa Fares , Amor Nafkha

In recent years, there has been extensive research on millimeter-wave (mmWave) communication and on in-band full-duplex (FD) communication, but work on the combination of the two is relatively lacking. FD mmWave systems could offer…

信号处理 · 电气工程与系统科学 2020-07-01 Ian P. Roberts , Sriram Vishwanath

Massive multiple-input multiple-output (MIMO) is widely recognized as a promising technology for future 5G wireless communication systems. To achieve the theoretical performance gains in massive MIMO systems, accurate channel state…

信息论 · 计算机科学 2017-01-30 Wenqian Shen , Linglong Dai , Yi Shi , Byonghyo Shim , Zhaocheng Wang

A photonics-assisted analog wideband RF self-interference (SI) cancellation and frequency downconversion approach for in-band full-duplex (IBFD) multiple-input multiple-output (MIMO) systems with adaptive digital amplitude and delay…

信号处理 · 电气工程与系统科学 2023-04-12 Taixia Shi , Yang Chen

Large Language Models (LLMs) are increasingly deployed in agentic systems that interact with an external environment; this makes them susceptible to prompt injections when dealing with untrusted data. To overcome this limitation, we propose…

密码学与安全 · 计算机科学 2026-01-21 Nils Philipp Walter , Chawin Sitawarin , Jamie Hayes , David Stutz , Ilia Shumailov

Intelligent reflecting surface (IRS)-assisted unmanned aerial vehicle (UAV) communications are expected to alleviate the load of ground base stations in a cost-effective way. Existing studies mainly focus on the deployment and resource…

信息论 · 计算机科学 2023-12-11 Zhaolong Ning , Hao Hu , Xiaojie Wang , Qingqing Wu , Chau Yuen , F. Richard Yu , Yan Zhang

In a cellular Internet of Things, burst transmissions from millions of machine type communications (MTC) devices can result in channel congestion. The main bottleneck in such scenario is inefficient random access channel (RACH) mechanism…

网络与互联网体系结构 · 计算机科学 2021-06-10 Yeduri Sreenivasa Reddy , Ankit Dubey , Abhinav Kumar , Trilochan Panigrahi

Movable antennas (MAs) have demonstrated significant potential in enhancing the performance of integrated sensing and communication (ISAC) systems. However, the application in the integrated and cost-effective full-duplex (FD) monostatic…

信息论 · 计算机科学 2025-05-15 Size Peng , Cixiao Zhang , Yin Xu , Qingqing Wu , Lipeng Zhu , Xiaowu Ou , Dazhi He

This letter proposes a novel anti-interference communication method leveraging computational antennas, utilizing time averaging and 1-bit reconfigurable intelligent surfaces (RIS) to achieve robust signal modulation with minimal hardware…

计算物理 · 物理学 2025-10-20 Xiaocun Zong , Fan Yang , Shenheng Xu , Maokun Li

This paper addresses the problem of scalability for a cell-free massive MIMO (CF-mMIMO) system that performs integrated sensing and communications (ISAC). Specifically, the case where a large number of access points (APs) are deployed to…

信息论 · 计算机科学 2024-06-10 Stefano Buzzi , Carmen D'Andrea , Sergi Liesegang

The integrated sensing and communication (ISAC) system under multi-input multi-output (MIMO) architecture achieves dual functionalities of sensing and communication on the same platform by utilizing spatial gain, which provides a feasible…

信号处理 · 电气工程与系统科学 2024-07-09 Yangyang Niu , Zhiqing Wei , Dingyou Ma , Xiaoyu Yang , Huici Wu , Zhiyong Feng , Jianhua Yuan

In this paper, we consider a two-cell interfering two-user multiple-input multiple-output multiple access channel (MIMO-MAC) with limited feedback. We first investigate the multiplexing gain of such channel when users have perfect channel…

信息论 · 计算机科学 2010-10-06 Namyoon Lee , Wonjae Shin , Bruno Clerckx