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Masked Image Modeling (MIM) is a powerful self-supervised strategy for visual pre-training without the use of labels. MIM applies random crops to input images, processes them with an encoder, and then recovers the masked inputs with a…

计算机视觉与模式识别 · 计算机科学 2024-04-23 Maryam Haghighat , Peyman Moghadam , Shaheer Mohamed , Piotr Koniusz

Index modulation, where information bits are conveyed through antenna indices (spatial modulation) and subcarrier indices (subcarrier index modulation) in addition to information bits conveyed through conventional modulation symbols, is…

信息论 · 计算机科学 2014-07-08 T. Lakshmi Narasimhan , A. Chockalingam

Secure communication in the Multi-user and Multi-eavesdropper (MUME) scenario is considered in this paper. It has be shown that secrecy can be improved when the transmitter simultaneously transmits information-bearing signal to the intended…

信息论 · 计算机科学 2020-03-25 Kun Xie , Wen Chen , Lili Wei

In this paper, an intelligent reflecting surface (IRS) is leveraged to enhance the physical layer security of an integrated sensing and communication (ISAC) system in which the IRS is deployed to not only assist the downlink communication…

信息论 · 计算机科学 2022-07-20 Meng Hua , Qingqing Wu , Wen Chen , Octavia A. Dobre , A. Lee Swindlehurst

We propose a novel coded integrated passive sensing and communication (CIPSAC) system with orthogonal frequency division multiplexing (OFDM), where a multi-antenna base station (BS) passively senses the parameters of the targets and decodes…

信号处理 · 电气工程与系统科学 2025-02-19 Chenghong Bian , Kaitao Meng , Huihui Wu , Yumeng Zhang , Deniz Gunduz

Based on the concept of constructive interference (CI), multiuser interference (MUI) has recently been shown to be beneficial for communication secrecy. A few CI-based secure precoding algorithms have been proposed that use both the channel…

信息论 · 计算机科学 2019-08-09 Qian Xu , Pinyi Ren , A. Lee Swindlehurst

Physical layer security has recently been regarded as an emerging technique to complement and improve the communication security in future wireless networks. The current research and development in physical layer security is often based on…

信息论 · 计算机科学 2013-10-02 Biao He , Xiangyun Zhou

Data transmission rate in molecular communication systems can be improved by using multiple transmitters and receivers. In molecular multiple-input multiple-output (MIMO) systems which use only single type of molecules, the performance at…

信息论 · 计算机科学 2019-04-23 Nithin V. Sabu , Neeraj Varshney , Abhishek K. Gupta

Stacked intelligent metasurfaces (SIM) is a revolutionary technology, which can outperform its single-layer counterparts by performing advanced signal processing relying on wave propagation. In this work, we exploit SIM to enable transmit…

Non-orthogonal multiple access (NOMA) is capable of serving different numbers of users in the same time-frequency resource element, and this feature can be leveraged to carry additional information. In the orthogonal frequency division…

信息论 · 计算机科学 2022-10-25 Ziyi Xie , Wenqiang Yi , Xuanli Wu , Yuanwei Liu , Arumugam Nallanathan

Directional modulation (DM) is a physical layer security technique based on antenna arrays and so far the polarisation information has not been considered in its designs. To increase the channel capacity, we consider exploiting the…

信号处理 · 电气工程与系统科学 2018-01-03 Bo Zhang , Wei Liu , Xiang Lan

This paper proposes a novel multi-carrier modulation framework for high-mobility communication scenarios. Our key idea lies in spreading data symbols across the delay-Doppler (DD) domain through orthogonal chirp-Zak transform (CZT). To…

信号处理 · 电气工程与系统科学 2025-11-25 Chaoyuan Bai , Pingzhi Fan , Zhengchun Zhou , Zilong Liu

The sixth generation (6G) systems will likely employ orthogonal frequency division multiplexing (OFDM) waveform for performing the joint task of sensing and communication. In this paper, we design an OFDM system for integrated sensing and…

信息论 · 计算机科学 2025-09-30 Vijaya Yajnanarayana , Philipp Geuer

Low-power wide-area networks (LPWANs) are crucial for large-scale Internet of Things (IoT) applications, yet they face increasing demands for higher data rates, improved reliability, and enhanced energy efficiency under stringent hardware…

信息论 · 计算机科学 2026-04-24 Long Yuan , Wenkun Wen , Junlin Liu , Peiran Wu , Minghua Xia

This paper proposes a novel non-orthogonal affine frequency division multiplexing (nAFDM) waveform for reliable high-mobility communications with enhanced spectral efficiency (SE). The key idea is to introduce a bandwidth compression factor…

信息论 · 计算机科学 2026-02-17 Qin Yi , Zilong Liu , Leila Musavian , Zeping Sui

The broadcast nature of wireless communication systems makes wireless transmission extremely susceptible to eavesdropping and even malicious interference. Physical layer security technology can effectively protect the private information…

密码学与安全 · 计算机科学 2021-12-30 Weiping Shi , Xinyi Jiang , Jinsong Hu , Yin Teng , Yang Wang , Hangjia He , Rongen Dong , Feng Shu , Jiangzhou Wang

Index modulation (IM) is one of the key enabling technologies for beyond fifth generation (B5G) and sixth generation (6G) wireless systems, attracting attention for its inherent energy and spectral efficiency resulting from conveying…

信号处理 · 电气工程与系统科学 2025-03-04 Hyeon Seok Rou , Giuseppe Thadeu Freitas de Abreu , Takumi Takahashi , David González G. , Osvaldo Gonsa

We propose a new secret communication scheme over the bosonic wiretap channel. It uses readily available hardware such as lasers and direct photodetectors. The scheme is based on randomness extractors, pulse-position modulation, and…

量子物理 · 物理学 2025-12-10 Esther Hänggi , Iyán Méndez Veiga , Ligong Wang

In a directional modulation (DM) network, the issues of security and privacy have taken on an increasingly important role. Since the power allocation of confidential message and artificial noise will make a constructive effect on the system…

信息论 · 计算机科学 2019-07-17 Linlin Sun , Jiayu Li , Yu Zhang , Yuntian Wang , Linqing Gui , Fanyuan Li , Haochen Li , Zhihong Zhuang , Feng Shu

Index modulation (IM) has recently emerged as a promising concept for spectrum and energy-efficient next generation wireless communications systems since it strikes a good balance among error performance, complexity, and spectral…

信号处理 · 电气工程与系统科学 2018-04-18 Adnan Zafar , Aijun Cao , Mahmoud Abdullahi , Lei Zhang , Pei Xiao , Muhammad Ali Imran