Results 41 to 50 of about 2,223,777 (199)
Applications of perfect difference codes in fiber-optics and wireless optical code-division multiplexing/multiple-access systems [PDF]
, 2012 After establishing itself in the radio domain, Spread spectrum code-division multiplexing/multiple-access (CDMA) has seen a recent upsurge in optical domain as well.
Umrani, Fahim Aziz
core
Photonics, 2015 This paper proposes a theoretical study to characterize the transmission of optical code division multiple access (CDMA) systems deploying polarization shift keying (PolSK) over a free space optical (FSO) link under the impact of atmospheric turbulence ...
Fan Bai, Yuwei Su, Takuro Sato
doaj +1 more source
International Journal of Mental Health Nursing, Volume 35, Issue 2, April 2026.ABSTRACT Anxiety is more prevalent than other mental disorders and maintains a bidirectional relationship with sleep disturbances, negatively affecting well‐being and overall mental health. This scenario underscores the need to strengthen and qualify nursing practice in addressing these outcomes.
Louise Constancia de Melo Alves Silva +9 more
wiley +1 more source
Chip-Asynchronous Binary Optical CDMA: An Optimum Signaling Scheme for Random Delays
IEEE Photonics Journal, 2013 Most optical code division multiple access (OCDMA) research literature has focused on chip-synchronous OCDMA. However, practical OCDMA networks are inherently chip-asynchronous since users transmit their signals from different locations without any ...
Salman A. Khan, Jan Bajcsy
doaj +1 more source
Performance Analysis of Optical-CDMA for Uplink Transmission in Medical Extra-WBANs
IEEE Access, 2020 This paper considers the use of infrared wireless communications for uplink transmission in extra wireless body-area networks. We focus on a multi-user medical application, where the collected medical data of several patients inside a hospital room is ...
Md Jahid Hasan +3 more
doaj +1 more source
New Difference Triangle Sets by a Field‐Programmable Gate Array‐Based Search Technique
Journal of Combinatorial Designs, Volume 34, Issue 1, Page 37-50, January 2026.ABSTRACT We provide some difference triangle sets with scopes that improve upon the best known values. These are found with purpose‐built digital circuits realized with field‐programmable gate arrays (FPGAs) rather than software algorithms running on general‐purpose processors.
Mohannad Shehadeh +2 more
wiley +1 more source
Detection of shortened OOC codewords in optical CDMA systems with double hard-limiters
, 2000 The effect of double hard-limiters in direct-detection optical asynchronous code division multiple access (CDMA) systems using shortened optical orthogonal codes (OOC) is investigated in this work. The performance improvement in case of shortened OOCs is
Ergul, R, Argon, C
core +1 more source
Analysis of Optical CDMA Signal Transmission: Capacity Limits and Simulation Results
EURASIP Journal on Advances in Signal Processing, 2005 We present performance limits of the optical code-division multiple-access (OCDMA) networks. In particular, we evaluate the information-theoretical capacity of the OCDMA transmission when single-user detection (SUD) is used by the receiver.
Yim Raymond MH +3 more
doaj +1 more source
Photonics, 2022 In order to solve the problem of one-dimensional code length, two-dimensional code spatial length, phase induced intensity noise PIIN effect, improved system capacity, and increased the number of simultaneous users, a new three-dimensional spectral/time ...
Mohamed Rahmani +4 more
doaj +1 more source
The Journal of Engineering, Volume 2026, Issue 1, January/December 2026.ABSTRACT Smart cities represent transformative urban ecosystems, leveraging advanced technologies to address challenges posed by rapid urbanisation, energy efficiency demands, and sustainability goals. Despite extensive research, a comprehensive and integrated literature analysis combining AI‐based communication, energy management, cybersecurity, and ...
Maaz Tahir Malik +5 more
wiley +1 more source