Results 61 to 70 of about 2,794,451 (217)

An Efficient Index Mapping Algorithm for OFDM-Index Modulation

IEEE Access, 2019
An index mapping algorithm that efficiently associates the subcarrier activation pattern (SAP) or constellation mode pattern (CMP) sequences with the index selecting bit (ISB) sequences is proposed to improve the error performances of two OFDM-`index ...
Eunchul Yoon, Sun-Yong Kim, Soonbum Kwon, Unil Yun   +3 more
doaj   +1 more source

A Probability‐Aware AI Framework for Reliable Anti‐Jamming Communication

CAAI Transactions on Intelligence Technology, Volume 11, Issue 2, Page 349-366, April 2026.
ABSTRACT Adversarial jamming attacks have increased on communication systems, causing distortion and threatening transmissions. Typical attacks rely on traditional, well‐defined cryptographic protocols and frequency‐hopping techniques. Nevertheless, these techniques become vulnerable when facing intelligent jammers.
Tawfeeq Shawly, Ahmed A. Alsheikhy
wiley   +1 more source

An Overview of Indoor OFDM/DMT Optical Wireless Communication Systems [PDF]

, 2010
This paper is an overview of indoor OFDM (orthogonal frequency division multiplexing)/DMT (discrete multitone) optical wireless (OW) communication systems. Indoor OW OFDM/DMT systems can be classified into two groups.
Elgala, Hany, Mesleh, Raed, Mehmood, Rashid, Haas, Harald   +3 more
core  

Orthogonal Frequency Division Multiplexing With Generalized Joint Index Modulation

IEEE Open Journal of the Communications Society
Orthogonal frequency division multiplexing with index modulation (OFDM-IM) is a promising multi-carrier technique for next generation wireless communication networks.
Zeng Hu, Yanke Che, Jing Wang, Xuhong Peng, Chaobo He, Dehuan Wan, Yun Liu, Ting Wu   +7 more
doaj   +1 more source

Zero-Padded Orthogonal Frequency Division Multiplexing with Index Modulation Using Multiple Constellation Alphabets

IEEE Access, 2017
Orthogonal frequency-division multiplexing (OFDM) with index modulation has been emerged as a promising technique for next-generation networks, where the specific activation pattern of the OFDM subcarriers is capable of conveying additional information ...
Tianqi Mao, Qi Wang, Jinguo Quan, Zhaocheng Wang   +3 more
doaj   +1 more source

Demonstration of 3D‐Printed Optical Antennas for High‐Speed Optical Wireless Communication Using Market‐Ready Materials

Advanced Materials Technologies, Volume 11, Issue 1, 8 January 2026.
The feasibility of 3D‐printed optical antennas using commercial, non‐optical materials for Optical Wireless Communications (OWC) is demonstrated. This study combines spectral analysis, anisotropy effects, and telecom‐relevant optical measurements, revealing promising performance and novel insights for low‐cost, customizable photonic components in ...
Mauro Aresti, Marco Meucci, Paolo Foggi, Caterina Credi, Satoshi Iketani, Cristiana Lofrumento, Jacopo Catani   +6 more
wiley   +1 more source

Coherent and Non-Coherent Multilayer Index Modulation

IEEE Access, 2019
Index modulation assisted OFDM (OFDM-IM) has become a popular technique in wireless communications. In this paper, we proposes a novel multilayer framework for OFDM-IM.
Sarath Gopi, Sheetal Kalyani, Lajos Hanzo   +2 more
doaj   +1 more source

Index Modulation Multiple-Access (IMMA): Efficient Techniques for Downlink Millimeter Waves Outdoor Channel

IEEE Open Journal of Vehicular Technology, 2021
In this paper, we propose two new multiple-access schemes for downlink transmission based on the combination of orthogonal frequency division multiplexing (OFDM) with index modulation (IM), namely OFDM-IM.
Said El-Khamy, Hassan M. Elragal, Remon A. Polus   +2 more
doaj   +1 more source

Silent yet impaired: Hidden memory processing deficits in asymptomatic individuals with moderate‐to‐severe white matter hyperintensities

Alzheimer's &Dementia, Volume 22, Issue 1, January 2026.
Abstract INTRODUCTION White matter hyperintensities (WMHs) are strongly associated with cognitive decline and dementia, but whether asymptomatic individuals with moderate‐to‐severe WMHs (msWMHs) are truly cognitively intact, particularly in visual short‐term memory (VSTM), remains unclear.
Aonan Li, Lei Liu, Yueyan Bian, Yuanyuan Lu, Xiuqin Jia, Yuanyuan Chen, Yi Tang, Yi Xing   +7 more
wiley   +1 more source

Multiuser MIMO-OFDM for Next-Generation Wireless Systems

, 2007
This overview portrays the 40-year evolution of orthogonal frequency division multiplexing (OFDM) research. The amelioration of powerful multicarrier OFDM arrangements with multiple-input multiple-output (MIMO) systems has numerous benefits, which are ...
Jiang, M, Ming Jiang, Hanzo, L, Lajos Hanzo   +3 more
core   +2 more sources