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Low Earth orbit (LEO) satellite constellations have become a critical enabler for global coverage, utilizing numerous satellites orbiting Earth at high speeds. By decomposing complex network services into lightweight service functions,…

Networking and Internet Architecture · Computer Science 2026-03-05 Li Zeng , Zixin Wang , Yuanming Shi , Khaled B. Letaief

We study the collaborative image retrieval problem at the wireless edge, where multiple edge devices capture images of the same object from different angles and locations, which are then used jointly to retrieve similar images at the edge…

Image and Video Processing · Electrical Eng. & Systems 2023-02-14 Wing Fei Lo , Nitish Mital , Haotian Wu , Deniz Gündüz

A novel concept of Joint Source and Channel Sensing (JSCS) is introduced in the context of Cognitive Radio Sensor Networks (CRSN). Every sensor node has two basic tasks: application-oriented source sensing and ambient-oriented channel…

Information Theory · Computer Science 2014-02-25 Huazi Zhang , Zhaoyang Zhang , Xiaoming Chen , Rui Yin

Integrated sensing and communication (ISAC) and ubiquitous connectivity are two usage scenarios of sixth generation (6G) networks. In this context, low earth orbit (LEO) satellite constellations, as an important component of 6G networks, is…

Information Theory · Computer Science 2025-01-14 Qi Wang , Xiaoming Chen , Qiao Qi , Mili Li , Wolfgang Gerstacker

In this paper, the energy efficient design for probabilistic semantic communication (PSC) system with rate splitting multiple access (RSMA) is investigated. Basic principles are first reviewed to show how the PSC system works to extract,…

Information Theory · Computer Science 2024-04-02 Ruopeng Xu , Zhaohui Yang , Zhouxiang Zhao , Qianqian Yang , Zhaoyang Zhang

We propose a hybrid joint source-channel coding (JSCC) scheme, in which the conventional digital communication scheme is complemented with a generative refinement component to improve the perceptual quality of the reconstruction. The input…

Information Theory · Computer Science 2023-08-17 Xueyan Niu , Xu Wang , Deniz Gündüz , Bo Bai , Weichao Chen , Guohua Zhou

Low earth orbit (LEO) satellite navigation signal can be used as an opportunity signal in case of a Global navigation satellite system (GNSS) outage, or as an enhancement means of traditional GNSS positioning algorithms. No matter which…

Signal Processing · Electrical Eng. & Systems 2021-06-01 Liang Chen , Xiangchen Lu , Nan Shen , Lei Wang , Yuan Zhuang , Ye Su , Deren Li , Ruizhi Chen

Semantic Communication (SemCom) is a promising new paradigm for next-generation communication systems, emphasizing the transmission of core information, particularly in environments characterized by uncertainty, noise, and bandwidth…

Information Theory · Computer Science 2025-02-25 Feibo Jiang , Siwei Tu , Li Dong , Kezhi Wang , Kun Yang , Ruiqi Liu , Cunhua Pan , Jiangzhou Wang

Satellite systems face a significant challenge in effectively utilizing limited communication resources to meet the demands of ground network traffic, characterized by asymmetrical spatial distribution and time-varying characteristics.…

Networking and Internet Architecture · Computer Science 2023-07-31 Sheikh Salman Hassan , Yu Min Park , Yan Kyaw Tun , Walid Saad , Zhu Han , Choong Seon Hong

Recently, deep learning-enabled joint-source channel coding (JSCC) has received increasing attention due to its great success in image transmission. However, most existing JSCC studies only focus on single-input single-output (SISO)…

Signal Processing · Electrical Eng. & Systems 2023-02-28 Guangyi Zhang , Qiyu Hu , Yunlong Cai , Guanding Yu

Despite the widespread adoption of vision sensors in edge applications, such as surveillance, the transmission of video data consumes substantial spectrum resources. Semantic communication (SC) offers a solution by extracting and…

Computer Vision and Pattern Recognition · Computer Science 2026-01-06 Yubo Peng , Luping Xiang , Kun Yang , Kezhi Wang , Merouane Debbah

The integration of Non-Terrestrial Networks (NTNs) with Low Earth Orbit (LEO) satellite constellations into 5G and Beyond is essential to achieve truly global connectivity. A distinctive characteristic of LEO mega constellations is that…

Networking and Internet Architecture · Computer Science 2026-03-16 Israel Leyva-Mayorga , Fabio Saggese , Lintao Li , Petar Popovski

Reliable image transmission over wireless channels is particularly challenging at extremely low transmission rates, where conventional compression and channel coding schemes fail to preserve adequate visual quality. To address this issue,…

Information Theory · Computer Science 2025-10-27 Shengkang Chen , Tong Wu , Zhiyong Chen , Feng Yang , Meixia Tao , Wenjun Zhang

In high-dynamic low earth orbit (LEO) satellite communication (SATCOM) systems, frequent channel state information (CSI) acquisition consumes a large number of pilots, which is intolerable in resource-limited SATCOM systems. To tackle this…

Information Theory · Computer Science 2024-10-30 Chenlan Lin , Xiaoming Chen , Zhaoyang Zhang

This paper introduces and analyzes Spatial Phase Manifold Communications (SPMC), a paradigm that facilitates joint communication and sensing (JCAS) over Local Oscillator (LO) free receiver. Information is embedded in, and recovered from,…

Signal Processing · Electrical Eng. & Systems 2026-05-12 Hasan Atalay Gunel , Mohaned Chraiti , Ali Gorcin

In recent years, the number of satellites in orbit has increased rapidly, with megaconstellations like Starlink providing near-global, delay-sensitive communication services. However, not all satellite communication use cases have stringent…

Networking and Internet Architecture · Computer Science 2026-03-10 Ethan Fettes , Pablo G. Madoery , Halim Yanikomeroglu , Gunes Karabulut Kurt , Abhishek Naik , Stéphane Martel

The integration of machine learning (ML) has significantly enhanced the capabilities of Earth Observation (EO) systems by enabling the extraction of actionable insights from complex datasets. However, the performance of data-driven EO…

In recent developments, deep learning (DL)-based joint source-channel coding (JSCC) for wireless image transmission has made significant strides in performance enhancement. Nonetheless, the majority of existing DL-based JSCC methods are…

Image and Video Processing · Electrical Eng. & Systems 2023-11-28 Junyu Pan , Hanlei Li , Guangyi Zhang , Yunlong Cai , Guanding Yu

This paper proposes an energy-efficient RIS-assisted downlink NOMA communication for LEO satellite networks. The proposed framework simultaneously optimizes the transmit power of ground terminals of the LEO satellite and the passive…

Signal Processing · Electrical Eng. & Systems 2023-06-21 Wali Ullah Khan , Eva Lagunas , Asad Mahmood , Symeon Chatzinotas , Björn Ottersten

A joint communication and computation (JCC) framework using segmented pinching antenna system (PASS) is proposed, where both the communication bit streams and computation data are simultaneously transmitted via uplink communications. The…

Signal Processing · Electrical Eng. & Systems 2025-11-21 Deqiao Gan , Xiaoxia Xu , Xiaohu Ge , Yuanwei Liu