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The emerging Non-Terrestrial Networks (NTNs) can aid to provide 5G and beyond services everywhere and anytime. However, the vast emergence of NTN systems will introduce an unseen interference to both the existing satellite systems and…

网络与互联网体系结构 · 计算机科学 2023-07-21 Henrik Martikainen , Mikko Majamaa , Jani Puttonen

We demonstrate an optical scheme for measuring the thickness of thin nanolayers with the use of light beam s spatial modes. The novelty in our scheme is the projection of the beam reflected by the sample onto a properly-tailored spatial…

光学 · 物理学 2013-10-11 N. Hermosa , C. Rosales-Guzmán , S. F. Pereira , J. P. Torres

This paper characterizes the performance of massive multiuser spatial modulation MIMO systems, when a regularized form of the least-squares method is used for detection. For a generic distortion function and right unitarily invariant…

信息论 · 计算机科学 2020-11-18 Ali Bereyhi , Saba Asaad , Bernhard Gäde , Ralf R. Müller , H. Vincent Poor

Receivers with joint channel estimation and signal detection using superimposed pilots (SP) can achieve high transmission efficiency in orthogonal time frequency space (OTFS) systems. However, existing receivers have high computational…

信息论 · 计算机科学 2024-04-16 Fupeng Huang , Qinghua Guo , Youwen Zhang , Yuriy Zakharov

Thanks to its superior features of fast read/write speed and low power consumption, spin-torque transfer magnetic random access memory (STT-MRAM) has become a promising non-volatile memory (NVM) technology that is suitable for many…

信息论 · 计算机科学 2024-10-10 Xingwei Zhong , Kui Cai , Zhen Mei , Tony Q. S. Quek

Motivated by the need for low electron dose transmission electron microscopy imaging, we report the optimal frame dose (i.e. $e^-/A^{2}$) range for object detection and segmentation tasks with neural networks. The MSD-net architecture shows…

We propose ST-DETR, a Spatio-Temporal Transformer-based architecture for object detection from a sequence of temporal frames. We treat the temporal frames as sequences in both space and time and employ the full attention mechanisms to take…

计算机视觉与模式识别 · 计算机科学 2021-07-27 Eslam Mohamed , Ahmad El-Sallab

Recently, the spatial modulation (SM) technique has been proposed for visible light communication (VLC). This paper investigates the average symbol error rate (SER) for the VLC using adaptive spatial modulation (ASM). In the system, the…

信息论 · 计算机科学 2018-07-27 Jin-Yuan Wang , Jian-Xia Zhu , Sheng-Hong Lin , Jun-Bo Wang

Rapid and programmable shaping of light fields is central to modern microscopy, display technologies, optical communications and sensing, quantum engineering, and quantum information processing. Current wavefront shaping technologies face a…

量子物理 · 物理学 2026-01-15 Xin Wei , Zeyang Li , Abhishek V. Karve , Adam L. Shaw , David I. Schuster , Jonathan Simon

In Spectrally Efficient Frequency Division Multiplexing systems the input data stream is divided into several adjacent subchannels where the distance of the subchannels is less than that of Orthogonal Frequency Division…

信息论 · 计算机科学 2013-04-16 Seyed Javad Heydari , Mahmoud Ferdosizade Naeiny , Farokh Marvasti

Index modulation schemes for reconfigurable intelligent surfaces (RIS)-assisted systems are envisioned as promising technologies for fifth-generation-advanced and sixth-generation (6G) wireless communication systems to enhance various…

信息论 · 计算机科学 2023-07-19 Aritra Basu , Soumya P. Dash , Aryan Kaushik , Debasish Ghose , Marco Di Renzo , Yonina C. Eldar

Loop-closure detection, also known as place recognition, aiming to identify previously visited locations, is an essential component of a SLAM system. Existing research on lidar-based loop closure heavily relies on dense point cloud and 360…

机器人学 · 计算机科学 2024-03-21 Lizhou Liao , Wenlei Yan , Li Sun , Xinhui Bai , Zhenxing You , Hongyuan Yuan , Chunyun Fu

This paper proposes a Joint Channel Estimation and Symbol Detection (JED) scheme for Multiple-Input Multiple-Output (MIMO) wireless communication systems. Our proposed method for JED using Alternating Direction Method of Multipliers…

信息论 · 计算机科学 2023-08-22 Swati Bhattacharya , K. V. S. Hari , Yonina C. Eldar

SHallow REcurrent Decoders (SHRED) are effective for system identification and forecasting from sparse sensor measurements. Such models are light-weight and computationally efficient, allowing them to be trained on consumer laptops.…

机器学习 · 计算机科学 2025-12-12 Alexey Yermakov , David Zoro , Mars Liyao Gao , J. Nathan Kutz

We propose a decentralized receiver for extra-large multiple-input multiple-output (XL-MIMO) arrays. Our method operates with no central processing unit (CPU) and all the signal detection tasks are done in distributed nodes. We exploit a…

信号处理 · 电气工程与系统科学 2021-03-12 Abolfazl Amiri , Carles Navarro Manch'on , Elisabeth de Carvalho

Complex Semi-Definite Programming (SDP) is introduced as a novel approach to phase retrieval enabled control of monochromatic light transmission through highly scattering media. In a simple optical setup, a spatial light modulator is used…

We propose several differential decoding schemes for asynchronous multi-user MIMO systems based on orthogonal space-time block codes (OSTBCs) where neither the transmitters nor the receiver has knowledge of the channel. First, we derive…

信息论 · 计算机科学 2014-12-22 Sina Poorkasmaei , Hamid Jafarkhani

This paper proposes novel spectrum sensing algorithms for cognitive radio networks. By assuming known transmitter pulse shaping filter, synchronous and asynchronous receiver scenarios have been considered. For each of these scenarios, the…

最优化与控制 · 数学 2013-12-31 Tadilo Endeshaw Bogale , Luc Vandendorpe

Stochastic resonance (SR), a phenomenon originally introduced in climate modeling, enhances signal detection by leveraging optimal noise levels within non-linear systems. Traditional SR techniques, mainly based on single-threshold…

信号处理 · 电气工程与系统科学 2025-10-27 Dixon Vimalajeewa , Ursula U. Muller , Brani Vidakovic

In this work, an adaptive and robust null-space projection (AR-NSP) scheme is proposed for secure transmission with artificial noise (AN)-aided directional modulation (DM) in wireless networks. The proposed scheme is carried out in three…

信息论 · 计算机科学 2018-01-26 Feng Shu , Siming Wan , Shihao Yan , Qian Wang , Yongpeng Wu , Riqing Chen , Jun Li , Jinhui Lu