SCMA Codebook Design Based on Divided Extended Mother Codebook

Codebook Design of Keyblock Based Image Retrieval

This paper presents an image retrieval method based on keyblocks combing with interest points, furthermore the generation of codebook is also utilized to enhance the retrieval performance, where the balance between the retrieved precision and time cost can decide the codebook size of this CBIR system. Finally, the proposed method is compared with the method that only depends on interest points ...

SCMA with Low Complexity Symmetric Codebook Design for Visible Light Communication

Abstract—Sparse code multiple access (SCMA) is attracting significant research interests currently, which is considered as a promising multiple access technique for 5G systems. It serves as a good candidate for the future communication network with massive nodes due to its capability of handling user overloading. Introducing SCMA to visible light communication (VLC) can provide another opportun...

The Extended Codebook (XCB) Mode of Operation

We describe a block cipher mode of operation that implements a ‘tweakable’ (super) pseudorandom permutation with an arbitrary block length. This mode can be used to provide the best possible security in systems that cannot allow data expansion, such as disk-block encryption and some network protocols. The mode accepts an additional input, which can be used to protect against attacks that manipu...

Multiple Codebook Information Hiding Based On Minimum

Codebook Design forVector Quantization Using GeneticAlgorithm

Genetic algorithms have been widely used to solve optimization in many fields such as multi-objective optimization, Fuzzy Optimization, and scheduling problem. Vector quantization, a basic method, is adopted by image compression technology and has a better performance than scalar quantization. Hence, it is worth to study how to apply genetic algorithms on the optimal design of codebook generati...