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Massive machine type communication (mMTC) is one of the three fifth generation mobile networking (5G) key usage scenarios, which is characterized by a very large number of connected devices typically transmitting a relatively low volume of…

Signal Processing · Electrical Eng. & Systems 2018-05-11 Feilong Wang , Yuyan Zhang , Hui Zhao , Hanyuan Huang , Jing Li

Modern wireless networks must reliably support a wide array of connectivity demands, encompassing various user needs across diverse scenarios. Machine-Type Communication (mMTC) is pivotal in these networks, particularly given the challenges…

Machine Learning · Computer Science 2024-06-12 Ali Elkeshawy , HaÏfa Farès , Amor Nafkha

In this paper, we present a novel approach for joint activity detection (AD), channel estimation (CE), and data detection (DD) in uplink grant-free non-orthogonal multiple access (NOMA) systems. Our approach employs an iterative and…

Signal Processing · Electrical Eng. & Systems 2024-03-13 Yongjeong Oh , Jaehong Jo , Byonghyo Shim , Yo-Seb Jeon

Recently, grant-free transmission paradigm has been introduced for massive Internet of Things (IoT) networks to save both time and bandwidth and transmit the message with low latency. In order to accurately decode the message of each device…

Signal Processing · Electrical Eng. & Systems 2023-01-04 Mehrtash Mehrabi , Mostafa Mohammadkarimi , Masoud Ardakani

Massive multiple-input multiple-output (MIMO) is a key technology for emerging next-generation wireless systems. Utilizing large antenna arrays at base-stations, massive MIMO enables substantial spatial multiplexing gains by simultaneously…

Signal Processing · Electrical Eng. & Systems 2022-04-13 Ly V. Nguyen , Nhan T. Nguyen , Nghi H. Tran , Markku Juntti , A. Lee Swindlehurst , Duy H. N. Nguyen

To deploy and operate deep neural models in production, the quality of their predictions, which might be contaminated benignly or manipulated maliciously by input distributional deviations, must be monitored and assessed. Specifically, we…

Computer Vision and Pattern Recognition · Computer Science 2023-06-09 Guy Bar-Shalom , Yonatan Geifman , Ran El-Yaniv

Massive grant-free transmission and cell-free wireless communication systems have emerged as pivotal enablers for massive machine-type communication. This paper proposes a deep-unfolding-based joint activity and data detection (DU-JAD)…

Information Theory · Computer Science 2024-02-29 Gangle Sun , Wenjin Wang , Wei Xu , Christoph Studer

Cell-free massive MIMO (CF-mMIMO) networks have recently emerged as a promising solution to tackle the challenges arising from next-generation massive machine-type communications. In this paper, a fully grant-free deep learning (DL)-based…

Signal Processing · Electrical Eng. & Systems 2024-08-06 Muhammad Usman Khan , Enrico Testi , Marco Chiani , Enrico Paolini

This paper presents a novel machine-hearing system that exploits deep neural networks (DNNs) and head movements for robust binaural localisation of multiple sources in reverberant environments. DNNs are used to learn the relationship…

Audio and Speech Processing · Electrical Eng. & Systems 2019-04-08 Ning Ma , Tobias May , Guy J. Brown

As a green and secure wireless transmission way, secure spatial modulation (SM) is becoming a hot research area. Its basic idea is to exploit both the index of activated transmit antenna and amplitude phase modulation (APM) signal to carry…

Signal Processing · Electrical Eng. & Systems 2019-07-05 Feng Shu , Lin Liu , Yumeng Zhang , Guiyang Xia , Xiaoyu Liu , Jun Li , Shi Jin , Jiangzhou Wang

This article introduces a novel framework of multi-user detection (MUD) for K-repetition grant-free non-orthogonal multiple access (K-GF-NOMA), called $\alpha$ iterative interference cancellation diversity slotted aloha ($\alpha$-IIC-DSA).…

Information Theory · Computer Science 2024-01-10 Haoran Mei , Limei Peng , Pin-Han Ho

The performance of grant-free random access (GF-RA) is limited by the number of accessible random access resources (RRs) due to the absence of collision resolution. Compressive sensing (CS)-based RA schemes scale up the RRs at the expense…

Information Theory · Computer Science 2021-03-23 Ameha Tsegaye Abebe , Chung G. Kang

Intrusion Detection Systems (IDS) are a vital part of a network-connected device. In this paper, we develop a deep learning based intrusion detection system that is deployed in a distributed setup across devices connected to a network. Our…

Cryptography and Security · Computer Science 2025-08-13 Abu Shafin Mohammad Mahdee Jameel , Shreya Ghosh , Aly El Gamal

Many applications in cellular systems and sensor networks involve a random subset of a large number of users asynchronously reporting activity to a base station. This paper examines the problem of multiuser detection (MUD) in random access…

Information Theory · Computer Science 2018-03-06 Lorne Applebaum , Waheed U. Bajwa , Marco F. Duarte , Robert Calderbank

Detecting Denial of Service (DoS) and Distributed Denial of Service (DDoS) attacks remains a critical challenge in cybersecurity. This research introduces a hybrid deep learning model combining Gated Recurrent Units (GRUs) and a Neural…

Cryptography and Security · Computer Science 2025-04-11 Caroline Panggabean , Chandrasekar Venkatachalam , Priyanka Shah , Sincy John , Renuka Devi P , Shanmugavalli Venkatachalam

Grant-free transmission and cell-free communication are vital in improving coverage and quality-of-service for massive machine-type communication. This paper proposes a novel framework of joint active user detection, channel estimation, and…

Signal Processing · Electrical Eng. & Systems 2025-02-20 Gangle Sun , Mengyao Cao , Wenjin Wang , Wei Xu , Christoph Studer

The unique cost, flexibility, speed, and efficiency of modern UAVs make them an attractive choice in many applications in contemporary society. This, however, causes an ever-increasing number of reported malicious or accidental incidents,…

Artificial Intelligence · Computer Science 2024-10-22 Nikos Sakellariou , Antonios Lalas , Konstantinos Votis , Dimitrios Tzovaras

In random-access communication systems, the number of active users varies with time, and has considerable bearing on receiver's performance. Thus, techniques aimed at identifying not only the information transmitted, but also that number,…

Information Theory · Computer Science 2016-11-17 Ezio Biglieri , Marco Lops

Grant-free multiple-access (GFMA) is a valuable research topic, since it can support multiuser transmission with low latency. This paper constructs novel uniquely-decodable multi-amplitude sequence (UDAS) sets for GFMA systems, which can…

Information Theory · Computer Science 2022-04-11 Qi-Yue Yu , Ke-Xun Song

Ensuring secure and efficient multi-user (MU) transmission is critical for vehicular communication systems. Chaos-based modulation schemes have garnered considerable interest due to their benefits in physical layer security. However, most…

Information Theory · Computer Science 2025-10-30 Tingting Huang , Jundong Chen , Huanqiang Zeng , Guofa Cai , Georges Kaddoum