A family of fast walsh hadamard algorithms with identical sparse matrix factorization
, 2006 In this letter, we present a family of fast Walsh Hadamard transform algorithms that have an identical and iterative stage factorization. We show the transform factorization in terms of identical sparse matrices that implement the stages of general radix-
Martí i Puig, Pere
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A Fast Ofdm-Cdma User Demultiplexing Architecture [PDF]
, 2000 A fast algorithm based on a butterfly structure is presented that demultiplexes the symbols of a particular type of MC-MA (Multi-Carrier Multiple-Access) modulation previously proposed for indoor radio communications [1].
P. Martí-puig +2 more
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SECURE TRANSMISSION OF BIO-MEDICAL DATA USING STEGANOGRAPHY
ICTACT Journal on Communication Technology, 2018 To transmit secret data over the internet, the information should be sent in a way attacker finds it difficult to read the secret data. In this paper patient’s secret information is hidden in the bio-medical signal like ECG/EEG/PPG.
S Thenmozhi, P Sureka, Ramgopal Segu
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gammaSTAR: A framework for the development of dynamic, real‐time capable MR sequences
Magnetic Resonance in Medicine, Volume 94, Issue 4, Page 1485-1499, October 2025.Abstract Purpose To present the real‐time capability and advanced MR sequence library of the MR sequence development framework gammaSTAR. Methods The presented platform consists of four different components: (1) a frontend for sequence development combined with a Python backend for sequence generation; (2) a Lua backend for the creation of hardware ...
Simon Konstandin +2 more
wiley +1 more source
Image scrambler based on novel 4-D hyperchaotic system and magic square with fast Walsh–Hadamard transform [PDF]
, 2022 A novel 4-D hyperchaotic system that have seven positive parameters in third order with thirteen terms is proposed, in this paper, the proposed chaotic behavior is proved by analysis of the Lyapunov's exponent, fractional dimension, zero-one test ...
Hussein Ali Ismael +5 more
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Animal Trajectory Imputation and Uncertainty Quantification via Deep Learning
Environmetrics, Volume 36, Issue 6, September 2025.ABSTRACT Imputing missing data in animal trajectories is crucial for understanding animal movements during unobserved periods. However, the traditional methods, such as linear interpolation and the continuous‐time correlated random walk model, are often inadequate to capture the complexity of animal movements.
Kehui Yao +4 more
wiley +1 more source
Applications of Sparse Signal Recovery: 2D-Pattern Matching and Sparse Walsh-Hadamard Transform Computation [PDF]
, 2021 We study two problems related to sparse signal recovery. The first problem considered is querying a sub-image of size square of M in a large image database of size square of N to determine all the locations where sub-image appears.
Gao, Jiahui
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Universal Joint Maximum Likelihood Frame Synchronization and PLS Decoding for DVB-S2X Systems
SignalsCompared to DVB-S2, DVB-S2X features a more intricate signaling structure. These signaling fields are employed not only in standard frames but are also frequently utilized within superframe structures.
Xin-Qi Liao, Yih-Min Chen
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Randomized Orthogonalization Process With Reorthogonalization
Numerical Linear Algebra with Applications, Volume 32, Issue 4, August 2025.ABSTRACT The dimension reduction technique of random sketching is advantageous in significantly reducing computational complexity. In orthogonalization processes like the Gram‐Schmidt (GS) algorithm, incorporating random sketching results in a halving of computational costs compared to the classical/modified Gram‐Schmidt (CGS/MGS) algorithms, while ...
Yongseok Jang, Laura Grigori
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An Efficient Joint Frame and Physical Layer Signaling Code Detection Method for DVB-S2
IEEE AccessThe Digital Video Broadcasting–Satellite Second Generation (DVB-S2) standard enhances coding and modulation techniques beyond those of DVB-S.
Xin-Qi Liao, Yih-Min Chen
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