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In this paper, a cognitive relay channel is considered, and amplify-and-forward (AF) relay beamforming designs in the presence of an eavesdropper and a primary user are studied. Our objective is to optimize the performance of the cognitive…

信息论 · 计算机科学 2010-10-01 Junwei Zhang , Mustafa Cenk Gursoy

Eavesdroppers of wireless signals want to infer as much as possible regarding the transmitter (Tx). Popular methods to minimize information leakage to the eavesdropper include covert communication, directional modulation, and beamforming…

信号处理 · 电气工程与系统科学 2025-03-07 Georgios Chrysanidis , Antonios Argyriou , Le-Nam Tran , Yanming Zhang , Yanwei Liu

This paper considers a movable antenna (MA)-aided secure multiple-input multiple-output (MIMO) communication system consisting of a base station (BS), a legitimate information receiver (IR) and an eavesdropper (Eve), where the BS is…

信息论 · 计算机科学 2024-03-08 Jun Tang , Cunhua Pan , Yang Zhang , Hong Ren , Kezhi Wang

This paper investigates the transmit beamforming design for multiple-input multiple-output systems to support both multi-target localization and multi-user communications. To enhance the target localization performance, we derive the…

信号处理 · 电气工程与系统科学 2025-01-14 Bo Tang , Da Li , Wenjun Wu , Astha Saini , Prabhu Babu , Petre Stoica

Monitoring location updates from mobile users has important applications in many areas, ranging from public safety and national security to social networks and advertising. However, sensitive information can be derived from movement…

密码学与安全 · 计算机科学 2020-08-31 Gabriel Ghinita , Kien Nguyen , Mihai Maruseac , Cyrus Shahabi

Through spatial multiplexing and diversity, multi-input multi-output (MIMO) cognitive radio (CR) networks can markedly increase transmission rates and reliability, while controlling the interference inflicted to peer nodes and primary users…

信息论 · 计算机科学 2013-02-07 Yu Zhang , Emiliano Dall'Anese , Georgios B. Giannakis

Image-based localization is a core component of many augmented/mixed reality (AR/MR) and autonomous robotic systems. Current localization systems rely on the persistent storage of 3D point clouds of the scene to enable camera pose…

计算机视觉与模式识别 · 计算机科学 2019-03-14 Pablo Speciale , Johannes L. Schönberger , Sing Bing Kang , Sudipta N. Sinha , Marc Pollefeys

As the demand for underwater communication continues to grow, underwater acoustic RIS (UARIS), as an emerging paradigm in underwater acoustic communication (UAC), can significantly improve the communication rate of underwater acoustic…

信号处理 · 电气工程与系统科学 2024-12-03 Ziqi Chen , Jun Du , Chunxiao Jiang , Zhu Han

The rapid growth of the low-altitude economy has resulted in a significant increase in the number of Low, slow, and small (LLS) unmanned aerial vehicles (UAVs), raising critical challenges for secure airspace management and reliable…

系统与控制 · 电气工程与系统科学 2025-10-13 Tianhao Liang , Mu Jia , Tingting Zhang , Junting Chen , Longyu Zhou , Tony Q. S. Quek , Pooi-Yuen Kam

This paper presents a trustworthy framework for achieving accurate cooperative localization in multiple unmanned aerial vehicle (UAV) systems. The The Cramer-Rao Lower Bound (CRLB) for the three-dimensional (3D) cooperative localization…

信号处理 · 电气工程与系统科学 2025-03-27 Zexin Fang , Bin Han , Hans D. Schotten

Reconfigurable Intelligent Surface (RIS) is one of the key technologies for the upcoming 6th Generation (6G) communications, which can improve the signal strength at the receivers by adding artificial propagation paths. In the context of…

信息论 · 计算机科学 2022-10-04 Yi Yu , Rita Ibrahim , Dinh-Thuy Phan-Huy

The dual-functional radar and communication (DFRC) technique constitutes a promising next-generation wireless solution, due to its benefits in terms of power consumption, physical hardware, and spectrum exploitation. In this paper, we…

信号处理 · 电气工程与系统科学 2023-01-03 Fuwang Dong , Wei Wang , Xin Li , Fan Liu , Sheng Chen , Lajos Hanzo

Unmanned aerial vehicles (UAVs) are foreseen to constitute promising airborne communication devices as a benefit of their superior channel quality. But UAV-to-ground (U2G) communications are vulnerable to eavesdropping. Hence, we conceive a…

信息论 · 计算机科学 2022-07-12 Zhong Zheng , Xinyao Wang , Zesong Fei , Qingqing Wu , Bin Li , Lajos Hanzo

With the evolution of integrated sensing and communication (ISAC) technology, a growing number of devices go beyond conventional communication functions with sensing abilities. Therefore, future networks are divinable to encounter new…

信号处理 · 电气工程与系统科学 2024-04-09 Teng Ma , Yue Xiao , Xia Lei , Ming Xiao

This paper studies a secrecy integrated sensing and communication (ISAC) system, in which a multi-antenna base station (BS) aims to send confidential messages to a single-antenna communication user (CU), and at the same time sense several…

信息论 · 计算机科学 2021-10-26 Zixiang Ren , Ling Qiu , Jie Xu

We consider a massive MU-MIMO downlink time-division duplex system where a base station (BS) equipped with many antennas serves several single-antenna users in the same time-frequency resource. We assume that the BS uses linear precoding…

信息论 · 计算机科学 2013-10-08 Hien Quoc Ngo , Erik G. Larsson , Thomas L. Marzetta

In a time division broadcast positioning system (TDBPS), a user device (UD) determines its position by obtaining sequential time-of-arrival (TOA) or pseudorange measurements from signals broadcast by multiple synchronized base stations…

信号处理 · 电气工程与系统科学 2021-02-03 Sihao Zhao , Xiao-Ping Zhang , Xiaowei Cui , Mingquan Lu

In this paper, we study the user localization and tracking problem in the reconfigurable intelligent surface (RIS) aided multiple-input multiple-output (MIMO) system, where a multi-antenna base station (BS) and multiple RISs are deployed to…

信号处理 · 电气工程与系统科学 2022-09-14 Boyu Teng , Xiaojun Yuan , Rui Wang , Shi Jin

It is well-known that the traditional transmit beamforming at a base station (BS) to manage interference in serving multiple users is effective only when the number of users is less than the number of transmit antennas at the BS.…

信息论 · 计算机科学 2017-08-29 Van-Dinh Nguyen , Hoang Duong Tuan , Trung Q. Duong , Oh-Soon Shin , H. Vincent Poor

In this paper, we consider the delay-constrained beamforming control for downlink multi-user MIMO (MU- MIMO) systems with imperfect channel state information at the transmitter (CSIT). The delay-constrained control problem is formulated as…

信息论 · 计算机科学 2015-06-15 Vincent K. N. Lau , Fan Zhang , Ying Cui