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This paper investigates artificial noise injection into the temporal and spatial dimensions of a legitimate wireless communication system to secure its transmissions from potential eavesdropping. We consider a multiple-input single-output…

Information Theory · Computer Science 2017-06-21 Ahmed El Shafie , Zhiguo Ding , Naofal Al-Dhahir

Spatial time series imputation is critically important to many real applications such as intelligent transportation and air quality monitoring. Although recent transformer and diffusion model based approaches have achieved significant…

Machine Learning · Computer Science 2023-09-06 Shunyang Zhang , Senzhang Wang , Xianzhen Tan , Ruochen Liu , Jian Zhang , Jianxin Wang

Unconventional receivers enable reduction of error rates in optical communication systems below the standard quantum limit (SQL) by implementing discrimination strategies for constellation symbols that go beyond the canonical measurement of…

Quantum Physics · Physics 2019-10-01 L. Kunz , M. T. DiMario , F. E. Becerra , K. Banaszek

Remote sensing anomaly detector can find the objects deviating from the background as potential targets for Earth monitoring. Given the diversity in earth anomaly types, designing a transferring model with cross-modality detection ability…

Computer Vision and Pattern Recognition · Computer Science 2024-09-11 Jingtao Li , Xinyu Wang , Hengwei Zhao , Liangpei Zhang , Yanfei Zhong

Compared to the error diffusion, dot diffusion provides an additional pixel-level parallelism for digital halftoning. However, even though its periodic and blocking artifacts had been eased by previous works, it was still far from…

Multimedia · Computer Science 2015-10-28 Yun-Fu Liu , Jing-Ming Guo

In frequency-division duplex (FDD) massive multiple-input multiple-output (MIMO) systems, the growing number of base station antennas leads to prohibitive feedback overhead for downlink channel state information (CSI). To address this…

Signal Processing · Electrical Eng. & Systems 2024-06-25 Yifan Ma , Hengtao He , Shenghui Song , Jun Zhang , Khaled B. Letaief

Lowering the noise level of short pulse lasers has been a long-standing effort for decades. Modeling the noise performance plays a crucial role in isolating the noise sources and reducing them. Modeling to date has either used analytical or…

Applied Physics · Physics 2018-10-17 Shaokang Wang , Thomas F. Carruthers , Curtis R. Menyuk

In this paper, the physical approach to model external (air-induced) passive intermodulation (PIM) is presented in a frequency-division duplexing (FDD) multiple-input multiple-output (MIMO) system with an arbitrary number of transceiver…

Information Theory · Computer Science 2024-09-27 Stanislav Krikunov , Viacheslav Zemlyakov , Andrey Ivanov

In the field of interactive coding, two or more parties wish to carry out a distributed computation over a communication network that may be noisy. The ultimate goal is to develop efficient coding schemes that can tolerate a high level of…

Data Structures and Algorithms · Computer Science 2022-08-04 Ran Gelles , Yael T. Kalai , Govind Ramnarayan

Wind noise significantly degrades the quality of outdoor audio recordings, yet remains difficult to suppress in real-time on resource-constrained devices. In this work, we propose a low-complexity single-channel deep neural network that…

Audio and Speech Processing · Electrical Eng. & Systems 2025-07-03 Hesam Eftekhari , Srikanth Raj Chetupalli , Shrishti Saha Shetu , Emanuël A. P. Habets , Oliver Thiergart

Snoring is a common disorder that affects people's social and marital lives. The annoyance caused by snoring can be partially solved with active noise control systems. In this context, the present work aims at introducing an enhanced system…

Audio and Speech Processing · Electrical Eng. & Systems 2023-08-01 Valeria Bruschi , Michela Cantarini , Luca Serafini , Stefano Nobili , Stefania Cecchi , Stefano Squartini

Channel measurements are the prerequisite for applying emerging transmission technologies and designing communication systems. In sixth-generation (6G) system, conventional time or frequency domain channel sounding methods cannot directly…

Signal Processing · Electrical Eng. & Systems 2025-10-23 Kaifeng Bao , Tao Zhou , Chaoyi Li , Liu Liu , Bo Ai

Contemporary text-to-image models exhibit a surprising degree of mode collapse, as can be seen when sampling several images given the same text prompt. Previous work has attempted to address this issue by steering the model using guidance…

Computer Vision and Pattern Recognition · Computer Science 2026-05-04 Anne Harrington , A. Sophia Koepke , Shyamgopal Karthik , Trevor Darrell , Alexei A. Efros

A discrete-time end-to-end fiber-optical channel model is derived based on the first-order perturbation approach. The model relates the discrete-time input symbol sequences of co-propagating wavelength channels to the received symbol…

Signal Processing · Electrical Eng. & Systems 2020-03-18 Felix Frey , Johannes K. Fischer , Robert F. H. Fischer

This work derives and validates a noise model that encapsulates deadtime of non-paralyzable detectors with random photon arrivals to enable advanced processing, like maximum-likelihood estimation, of high resolution atmospheric lidar…

Signal Processing · Electrical Eng. & Systems 2025-06-12 Grant J. Kirchhoff , Matthew Hayman , Willem J. Marais , Jeffrey P. Thayer , Rory A. Barton-Grimley

Diffusion models (DM) can gradually learn to remove noise, which have been widely used in artificial intelligence generated content (AIGC) in recent years. The property of DM for removing noise leads us to wonder whether DM can be applied…

Information Theory · Computer Science 2023-05-17 Tong Wu , Zhiyong Chen , Dazhi He , Liang Qian , Yin Xu , Meixia Tao , Wenjun Zhang

This paper introduces a practical approach for leveraging a real-time deep learning model to alternate between speech enhancement and joint speech enhancement and separation depending on whether the input mixture contains one or two active…

Audio and Speech Processing · Electrical Eng. & Systems 2023-10-17 Kashyap Patel , Anton Kovalyov , Issa Panahi

Filtered-X LMS (FxLMS) is commonly used for active noise control (ANC), wherein the soundfield is minimized at a desired location. Given prior knowledge of the spatial region of the noise or control sources, we could improve FxLMS by…

Machine Learning · Computer Science 2026-02-25 Kanad Sarkar , Austin Lu , Manan Mittal , Yongjie Zhuang , Ryan Corey , Andrew Singer

Micro-Doppler analysis has become increasingly popular in recent years owning to the ability of the technique to enhance classification strategies. Applications include recognising everyday human activities, distinguishing drone from birds,…

Signal Processing · Electrical Eng. & Systems 2021-02-16 Chong Tang , Wenda Li , Shelly Vishwakarma , Karl Woodbridge , Simon Julier , Kevin Chetty

The separation of single-channel underwater acoustic signals is a challenging problem with practical significance. Few existing studies focus on the source separation problem with unknown numbers of signals, and how to evaluate the…

Sound · Computer Science 2024-05-29 Qinggang Sun , Kejun Wang