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Satellite based quantum communication has been proven as a feasible way to achieve global scale quantum communication network. Very recently, a low-Earth-orbit (LEO) satellite has been launched for this purpose. However, with a single…

A low-divergence beam is an essential prerequisite for a high-efficiency longdistance optical link, particularly for satellite-based quantum communication. A point-ahead angle, caused by satellite motion, is always several times larger than…

IITMSAT is a student-built nano satellite mission of Indian Institute of Technology Madras, Chennai, India. The objective is to study the precipitation of high energy electrons and protons from Van-Allen radiation belts to lower altitude of…

Multi-device inference can reduce Transformer latency by parallelizing computation. However, existing methods require high inter-device bandwidth, making them impractical for bandwidth-constrained environments. We present ASTRA, a…

Machine Learning · Computer Science 2026-05-28 Xiao Liu , Lijun Zhang , Deepak Ganesan , Hui Guan

We present a registration algorithm which jointly estimates motion and the ground truth image from a set of noisy frames under rigid, constant translation. The algorithm is non-iterative and needs no hyperparameter tuning. It requires a…

Image and Video Processing · Electrical Eng. & Systems 2022-03-01 Evan Widloski , Farzad Kamalabadi

Satellite-ground semantic communication is anticipated to serve a critical role in the forthcoming 6G era. Nonetheless, task-oriented data transmission in such systems remains a formidable challenge, primarily due to the dynamic nature of…

Signal Processing · Electrical Eng. & Systems 2025-12-16 Hui Cao , Rui Meng , Xiaodong Xu , Shujun Han , Ping Zhang

The Low Frequency Array (LOFAR) is the only existing radio interferometer able to observe at ultra-low frequencies (<100 MHz) with high resolution (<15") and high sensitivity (<1 mJy/beam). To exploit these capabilities, the LOFAR Surveys…

Aerial-ground interference mitigation has been deemed as the main challenge in realizing cellular-connected unmanned aerial vehicle (UAV) communications. Due to the line-of-sight (LoS)-dominant air-ground channels, the UAV generates/suffers…

Information Theory · Computer Science 2020-02-03 Weidong Mei , Rui Zhang

This letter analyzes the performance of uplink integrated sensing and communications (ISAC) systems where communication users (CUs) and radar targets (RTs) share the same frequency band. A non-orthogonal multiple access (NOMA) protocol is…

Information Theory · Computer Science 2022-05-30 Chongjun Ouyang , Yuanwei Liu , Hongwen Yang

Future 6G networks envisions to blur the line between communication and sensing, leveraging ubiquitous OFDM waveforms for both high throughput data and environmental awareness. In this work, we do a thorough analysis of Communication based…

Signal Processing · Electrical Eng. & Systems 2025-07-25 Sandip Jana , Amit Kumar Mishra , Mohammed Zafar Ali Khan

Inter-connected sensors and actuators have scaled down to small embedded devices such as wearables, and at the same time meet a massive deployment at the Internet edge: the Internet of Things (IoT). Many of these IoT devices run on…

Networking and Internet Architecture · Computer Science 2020-03-20 Sebastian Meiling , Thomas C. Schmidt

This paper investigates an intelligent reflecting surface (IRS) enabled multiuser integrated sensing and communications (ISAC) system, which consists of one multi-antenna base station (BS), one IRS, multiple single-antenna communication…

Signal Processing · Electrical Eng. & Systems 2023-07-03 Xianxin Song , Xiaoqi Qin , Jie Xu , Rui Zhang

Low Earth Orbit (LEO) satellite communications (SatCom) are considered a promising solution to provide uninterrupted services in cellular networks. Line-of-sight (LoS) links between the LEO satellites and the ground users are, however,…

Signal Processing · Electrical Eng. & Systems 2022-06-01 Xiaowen Tian , Nuria Gonzalez-Prelcic , Takayuki Shimizu

Low frequency radio waves, while challenging to observe, are a rich source of information about pulsars. The LOw Frequency ARray (LOFAR) is a new radio interferometer operating in the lowest 4 octaves of the ionospheric "radio window":…

Low earth orbit (LEO) satellite systems with sensing functionality are envisioned to facilitate global-coverage service and emerging applications in 6G. Currently, two fundamental challenges, namely, inter-beam interference among users and…

Signal Processing · Electrical Eng. & Systems 2024-07-16 Ziang Liu , Longfei Yin , Wonjae Shin , Bruno Clerckx

Short-range reliable and secure communication is a major priority in the tactical, military and disaster response settings where the traditional communication infrastructure is either off-line or prone to interception. Current VHF/UHF…

Signal Processing · Electrical Eng. & Systems 2026-05-08 Ayush Kumar Agrawal , Soumendu Das , Saptaparna De , Jayendra Kumar

Recent advances in miniaturization and commercial availability of critical satellite subsystems and detector technology have made small satellites (SmallSats, including CubeSats) an attractive, low-cost potential solution for space weather…

Instrumentation and Methods for Astrophysics · Physics 2022-02-02 Amir Caspi , M. Barthelemy , C. D. Bussy-Virat , I. J. Cohen , C. E. DeForest , D. R. Jackson , A. Vourlidas , T. Nieves-Chinchilla

Satellite image restoration aims to improve image quality by compensating for degradations (e.g., noise and blur) introduced by the imaging system and acquisition conditions. As a fundamental preprocessing step, restoration directly impacts…

Computer Vision and Pattern Recognition · Computer Science 2026-04-30 Adrien Dorise , Marjorie Bellizzi , Omar Hlimi

LISA is a proposed space-based laser interferometer detecting gravitational waves by measuring distances between free-floating test masses housed in three satellites in a triangular constellation with laser links in-between. Each satellite…

Unmanned aerial vehicles (UAVs) are expected to be an important new class of users in the fifth generation (5G) and beyond 5G cellular networks. In particular, there are emerging UAV applications such as aerial photograph and data relaying…

Information Theory · Computer Science 2018-10-26 Liang Liu , Shuowen Zhang , Rui Zhang