Results 71 to 80 of about 27,401 (218)

Performance Evaluation of Low Density Spreading Multiple Access [PDF]

, 2012
In this paper, we evaluate the performance of Multicarrier-Low Density Spreading Multiple Access (MC-LDSMA) as a multiple access technique for mobile communication systems. The MC-LDSMA technique is compared with current multiple access techniques, OFDMA
AL-Imari, Mohammed, Chen, Dageng, Imran, Muhammad Ali, Tafazolli, Rahim   +3 more
core   +1 more source

Internet of Things in Healthcare Research: Trends, Innovations, Security Considerations, Challenges and Future Strategy

International Journal of Intelligent Systems, Volume 2025, Issue 1, 2025.
The Internet of Things (IoT) has become a transformative force across various sectors, including healthcare, offering new opportunities for automation and enhanced service delivery. The evolving architecture of the IoT presents significant challenges in establishing a comprehensive cyber‐physical framework. This paper reviews recent advancements in IoT‐
Attiq Ur Rehman, Songfeng Lu, Md Belal Bin Heyat, Muhammad Shahid Iqbal, Saba Parveen, Mohd Ammar Bin Hayat, Faijan Akhtar, Muhammad Awais Ashraf, Owais Khan, Dustin Pomary, Mohamad Sawan, Said El Kafhali   +11 more
wiley   +1 more source

Comparative Analysis between OFDMA and SC-FDMA: Model, Features and Applications

International Journal of Electrical Engineering and Applied Sciences, 2019
This paper represents Orthogonal Frequency Division Multiple Access (OFDMA) and Single Carrier Frequency Division Multiple Access (SCFDMA) techniques along with the Orthogonal Frequency Division Multiplexing (OFDM).
Abdullah Al-Mamun Bulbul, Farjana Imam, Mehenaz Mitu, Sonia Akter, Ety khanam, Shikha Rani Das   +5 more
doaj  

Trellis Tone Modulation Multiple-Access for Peer Discovery in D2D Networks

Sensors, 2018
In this paper, a new non-orthogonal multiple-access scheme, trellis tone modulation multiple-access (TTMMA), is proposed for peer discovery of distributed device-to-device (D2D) communication. The range and capacity of discovery are important performance
Chiwoo Lim, Min Jang, Sang-Hyo Kim
doaj   +1 more source

Unleashing the Potential of the Internet of Things: A Systematic Review of Low Power Wide Area Network Technologies for Smart Systems

Journal of Electrical and Computer Engineering, Volume 2025, Issue 1, 2025.
As the Internet of Things (IoT) ecosystem rapidly expands, the anticipated connection of over 75 billion devices highlights a critical demand for efficient and scalable connectivity solutions. Low‐power wide‐area network (LPWAN) technologies, notably Sigfox, Long Range (LoRa), and narrowband Internet of Things (NB‐IoT), are fundamental enablers driving
Aisyah Illani Sulaiman, Roshahliza M. Ramli, Waheb A. Jabbar, Mominul Ahsan   +3 more
wiley   +1 more source

Acoustic Indoor Localization System Integrating TDMA+FDMA Transmission Scheme and Positioning Correction Technique

Sensors, 2019
This paper presents a novel audio indoor localization system. In the proposed system, four speakers placed at known positions transmit chirp signals according to the time-division multiple access (TDMA) plus frequency-division multiple access (FDMA ...
Xiang Chen, Yuheng Chen, Shuai Cao, Lei Zhang, Xu Zhang, Xun Chen   +5 more
doaj   +1 more source

Dynamic and efficient device collaborations in 5G‐advanced and 6G networks

IET Communications, Volume 18, Issue 19, Page 1437-1450, December 2024.
Collaborative transmission, comprising multiple devices owned by a single user, is progressively evolving into an essential strategy to meet the stringent demands of burgeoning collaborative scenarios in 5G‐advanced and 6G networks. This paper proposes three novel use cases for device collaboration, namely data duplication, data splitting and wireless ...
Xianghui Han, Shuai Zhou, Shuaihua Kou, Jian Li, Ruiqi Liu, Shi Jin   +5 more
wiley   +1 more source

Dynamic hierarchical intrusion detection system for internet of vehicle on edge computing platform

IET Communications, Volume 18, Issue 20, Page 1778-1794, December 2024.
Classical intrusion detection systems struggle with the dynamic nature and resource limitations of the internet of vehicles (IoV). The dynamic hierarchical intrusion detection framework uses hierarchical clustering and edge computing for better protection and localized danger assessment in IoV.
Syed Sabir Mohamed S, Saranraj Gunasekaran, Rani Chinnamuthu, Gavendra Singh   +3 more
wiley   +1 more source

Low PAPR space frequency block coding for multiuser MIMO SC-FDMA systems: specific issues for users with different spectral allocations

EURASIP Journal on Advances in Signal Processing, 2011
Single-carrier space frequency block coding (SC-SFBC) is an innovative mapping scheme suitable for implementing transmit diversity in single-carrier frequency division multiple access (SC-FDMA) systems.
Ciochina Cristina, Mottier David, Castelain Damien   +2 more
doaj  

Phase Noise Suppression Algorithm Based on Modified LLR Metric in SC-FDMA System

Journal of Electrical and Computer Engineering, 2017
In single-carrier frequency-division multiple-access (SC-FDMA) receivers in the long-term evolution uplink, phase noise is one of the major radio-frequency front-end impairments that degrade system performance. To address this issue, we propose a new log-
Zijie Xu, Guangliang Ren
doaj   +1 more source