Results 41 to 50 of about 121,538 (312)
An Uplink SCMA Codebook Design Combining Probabilistic Shaping and Geometric Shaping
IEEE Access, 2020 Sparse Code Multiple Access (SCMA) is a promising non-orthogonal multiple access scheme owning to the shaping gain of its multi-dimensional codebook. Most of the existing designs of the codebook are based on geometric shaping (GS), while probabilistic ...
Chengxin Jiang, Yafeng Wang
doaj +1 more source
(Re)coding TikTok: The Memetic Interactivity Codebook for content analysis
Cultural Science, 2023 TikTok is one of the fastest-growing short-video platforms in the world. Its unique format and interaction possibilities make it a prime space to understand contemporary creators, their practices and strategies.
Vizcaíno-Verdú Arantxa +1 more
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A Multistage Method for SCMA Codebook Design Based on MDS Codes [PDF]
, 2019 Sparse Code Multiple Access (SCMA) has been recently proposed for the future generation of wireless communication standards. SCMA system design involves specifying several parameters.
da Silva, Bruno Fontana +3 more
core +5 more sources
Embedding Secret Data in a Vector Quantization Codebook Using a Novel Thresholding Scheme
MathematicsIn recent decades, information security has become increasingly valued, including many aspects of privacy protection, copyright protection, and digital forensics. Therefore, many data hiding schemes have been proposed and applied to various carriers such
Yijie Lin +3 more
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Design Low Complexity SCMA Codebook Using Arnold’s Cat Map
Journal of Telecommunications and Information Technology, 2022 In 5G wireless communications, sparse code multiple access (SCMA) – a multi-dimensional codebook based on a specific category of the non-orthogonal multiple access (NOMA) technique - enables many users to share non-orthogonal resource components with a ...
Sura S. Mohamed, Hikmat N. Abdullah
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Agribusiness, EarlyView.ABSTRACT The cocoa‐chocolate value chain faces significant environmental and social challenges, driving firms to adopt sustainability strategies ranging from individual practices to third‐party certifications. This study investigates the factors associated with these strategies by analyzing 304 cocoa‐chocolate companies using firm‐level data from the ...
Stella Marschner +3 more
wiley +1 more source
Construction method of optimal codebook based on Zadoff-Chu matrix
Tongxin xuebao, 2020 Codebooks with low-coherence have wide utilization in code division multiple access (CDMA) communications,quantum information theory,compressed sensing and so on.In order to expand the number of codebooks,the restrictions on the transformation matrix ...
Yubo LI +3 more
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Interleaving based SCMA Codebook Design Using Arnold’s Cat Chaotic Map
Iraqi Journal of Information & Communication Technology, 2023 Non-orthogonal multiple access (NOMA) technology is a significant topic of the present 5G investigation. A possible NOMA approach is Sparse Code Multiple Access (SCMA), increasing next-generation communication's ability to handle multiple users. In SCMA,
Sura S. Mohamed, Hikmat N. Abdullah
doaj +1 more source
, 2014 Multicarrier CDMA is a multiple access scheme in which modulated QAM symbols are spread over OFDMA tones by using a generally complex spreading sequence. Effectively, a QAM symbol is repeated over multiple tones.
Baligh, Hadi +3 more
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Structural problems without structural solutions? Youth leaders' perceptions of their community
American Journal of Community Psychology, EarlyView.Abstract As young people explore and reflect on the conditions of their neighborhoods and communities, they can forge a critical consciousness—merging their perspectives and analysis to direct both individual and collective actions. Photovoice is a methodological tool that allows participants to document their perspectives and analysis and discuss with
Linnea L. Hjelm +4 more
wiley +1 more source