Results 31 to 40 of about 2,434,105 (152)
Natural-ordered complex Hadamard transform
, 2009 This paper presents a new transform known as natural-ordered complex Hadamard transform (NCHT) which is derived from the Walsh–Hadamard transform (WHT) through the direct block matrix operation.
Ng, Boon Poh +3 more
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Annalen der Physik, Volume 538, Issue 4, April 2026.The Prouhet‐Thue‐Morse (PTM) sequence emerges as a unifying thread across quantum error correction, noise‐resistant memories, spin‐chain dynamics, quantum chaos, and Dirichlet links to the Riemann zeta function. Mapping PTM‐encoded logical states onto qubit and qudit architectures uncovers symmetry‐protected resilience and multifractal signatures ...
Denis Janković +3 more
wiley +1 more source
Remarks on numerical approximation of Volterra integral equations by Walsh–Hadamard transform
Results in Applied MathematicsWalsh functions form a piecewise-constant orthonormal basis that is particularly well-suited for digital computation and signal approximation. Nevertheless, the direct evaluation of Walsh transforms for discrete functions becomes computationally ...
Farrukh Mukhamedov +3 more
doaj +1 more source
Journal of Electrical and Computer Engineering, Volume 2026, Issue 1, 2026.The integration of reconfigurable intelligent surfaces (RIS) into multiple‐input multiple‐output (MIMO) systems offers transformative potential for enhancing spectral efficiency and mitigating channel impairments. However, efficient and accurate channel estimation (CE) remains a critical challenge due to multipath propagation, high dimensionality, and ...
Kevin M. Mwongera +3 more
wiley +1 more source
Estudo da transformada de Walsh-Hadamard aplicada à transmissão OFDM [PDF]
, 2006 Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Graduação em Engenharia Elétrica.Esta dissertação apresenta um estudo da aplicação da Transformada de Walsh-Hadamard (WHT) em diferentes sistemas OFDM ...
Doniak, Marcio Henrique
core
Comparing GFDM With OFDM for Use in 6G Communication From a New Perspective
Journal of Electrical and Computer Engineering, Volume 2026, Issue 1, 2026.The most important challenges facing 6G communication systems are the large amount of data and low latency as compared to previous generations. Therefore, it has become necessary to use advanced technologies to meet the requirements of 6G wireless communication systems.
Mohammed Azher Therib +2 more
wiley +1 more source
Optimized Fast Walsh–Hadamard Transform on GPUs for non-binary LDPC decoding
, 2014 The Fourier Transform Sum-Product Algorithm (FT-SPA) used in non-binary Low-Density Parity-Check (LDPC) decoding makes extensive use of the Walsh–Hadamard Transform (WHT).
Andrade, Joao +2 more
core +1 more source
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
core +2 more sources
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
doaj +1 more source