Results 81 to 90 of about 2,794,451 (217)

Deep Recurrent Neural Network Based Detector for OFDM With Index Modulation

IEEE Access
Index modulation (IM) leads to a decrease in power consumption and transmitter complexity compared to classical orthogonal frequency division multiplexing (OFDM) systems.
Md Abdul Aziz, Md Habibur Rahman, Mohammad Abrar Shakil Sejan, Rana Tabassum, Duck-Dong Hwang, Hyoung-Kyu Song   +5 more
doaj   +1 more source

Transformer‐Enhanced Multi‐Satellite IRS Coordination for Next‐Generation LEO Communications

IET Communications, Volume 20, Issue 1, January/December 2026.
This paper introduces a novel transformer‐enhanced framework for multi‐satellite intelligent refelecting surfaces (IRS) coordination that addresses these fundamental limitations through physics‐informed neural architectures incorporating orbital dynamics modelling, multi‐head self‐attention mechanisms for temporal dependency capture across rapidly ...
Ali Hussein Radhi, Mahmood Mohassel Feghhi, Mohammad Ali Balafar   +2 more
wiley   +1 more source

Unified Downlink‐Uplink Waveform Optimization For MIMO‐OFDM Integrated Sensing and Communication

IET Communications, Volume 20, Issue 1, January/December 2026.
This paper presents a unified waveform allocation framework for downlink and uplink MIMO‐OFDM integrated sensing and communication (ISAC) systems in 6G networks. We develop five optimization schemes, including optimal‐for‐communication, optimal‐for‐sensing, and MMSE‐based joint allocation, with closed‐form expressions for spectral efficiency, sensing ...
Gujjula Ramya, Puli Kishore Kumar, Santhosh Kumar Dhatrika   +2 more
wiley   +1 more source

Hierarchical Multi‐Stage Frequency Offset Estimation for THz Communications

IET Communications, Volume 20, Issue 1, January/December 2026.
This paper proposes a hierarchical multi‐stage frequency offset estimation framework for heterodyne terahertz communications. The receiver combines coarse spectral acquisition, confidence‐guided triggering, adaptive grid search and fine time‐domain correlation refinement to handle ultra‐large carrier frequency offsets under low‐signal‐to‐noise ratio ...
Haolin Zhang, Shen Zheng, Chao Li, Xiaojun Liu, Guangyou Fang   +4 more
wiley   +1 more source

Optical distribution of OFDM and impulse-radio UWB in FTTH networks [PDF]

, 2008
Proposal, experimental demonstration and performance comparison of impulse-radio UWB and OFDM UWB distribution in FTTH networks for high-definition audio/video broadcasting is presented.
Marti, Javier, Morant, Maria, J. Marti, Beltran, Marta, T. Alves, M. Beltran, J. Perez, Alves, Tiago, Llorente, Roberto, R. Llorente, Perez Soler, Joaquin, A. Cartaxo, Cartaxo, Adolfo, M. Morant   +13 more
core   +1 more source

Secret Key Extraction Using Stable Channel Impulse Response in OFDM Wireless Networks

IET Communications, Volume 20, Issue 1, January/December 2026.
The process of converting a complex impulse response (CIR) highest peak into a binary sequence is called ‘quantisation’. By quantising the CIR highest peaks, Alice and Bob will generate the secret key bit sequences KA and KB, respectively. The number of CIR highest peaks is infinite, and these highest peaks can be easily selected from the set of CIRs ...
Dinh Van Linh, Vu Van Yem, Hoang Thi Phuong Thao   +2 more
wiley   +1 more source

The Impact of OFDM-IM System Parameters on the Performance of the SLM PAPR Reduction Technique

NTU Journal of Engineering and Technology
Orthogonal Frequency Division Multiplexing with Index Modulation (OFDM-IM) is an effective communication technology that utilizes subcarrier indices to transmit information in addition to the information traditionally modulated on active subcarriers ...
Zainab Mohammed Abdulkareem, Mahdi Fadil Khaleel, Mahmoud Shakir Wahhab   +2 more
doaj   +1 more source

OFDM with Index Modulation for Asynchronous mMTC Networks

Sensors, 2018
One of the critical missions for next-generation wireless communication systems is to fulfill the high demand for massive Machine-Type Communications (mMTC). In mMTC systems, a sporadic transmission is performed between machine users and base station (BS)
Seda Doğan, Armed Tusha, Hüseyin Arslan   +2 more
doaj   +1 more source

Design of OFDM-IM system based on IRS-assisted

Dianxin kexue, 2023
Index modulation (IM) and intelligent reflecting surface (IRS) are emerging mobile communication technologies.In order to improve the reliability of traditional orthogonal frequency division multiplexing (OFDM) system, an orthogonal frequency division ...
Mengmeng ZHAO, Liming HE, Fangfang LIU
doaj   +2 more sources

Vector Approximate Message Passing Based OFDM-IM Detection for Underwater Acoustic Communications. [PDF]

Entropy (Basel), 2023
Feng X, Tian F, Zhou M, Sun H, Qasem ZAH.   +4 more
europepmc   +1 more source