Results 61 to 70 of about 148,419 (252)
Green communication systems via a wavefront multiplexing technique
Systems Engineering, Volume 28, Issue 1, Page 5-14, January 2025.Abstract A green communication scheme using an orthogonal wavefront (WF) multiplexing (Muxing) scheme spatially combined with orthogonal frequency‐division multiplexing (OFDM) techniques is proposed. It forms a spatial WF OFDM transceiver. The WF Muxing technique serves as the preprocessing and postprocessing method of the WF OFDM transceiver.
Hen‐Geul Yeh, Joe Lee
wiley +1 more source
An efficient no‐reference image quality analysis based on statistical perceptual features
IET Image Processing, Volume 19, Issue 1, January/December 2025.1. A novel and efficient feature‐based no‐reference image quality assessment (NR‐IQA) focus measure is proposed. 2. It is based on the statistical structural and texture features of the image. 3. The logarithmic entropy‐based focus measure shows promising results as compared to the existing techniques. Abstract It is well known that image quality needs
B. N. Al Sameera, Vilas H. Gaidhane
wiley +1 more source
Semi-fragile watermark algorithm based on Walsh-Hadamard transformand and convolution coding
Tongxin xuebao, 2009 A semi-fragile watermark algorithm based on the Walsh-Hadamard transform and convolution coding was proposed. In this algorithm, the watermark content of the host image was extracted by differential coding and convolution coding respectively based on the
ZHAO Feng1, LI Jian2, LI Sheng-hong2
doaj +2 more sources
Continuity of the fractional Hankel wavelet transform on the spaces of type S [PDF]
, 2018 In this article we study the fractional Hankel transform and its inverse on certain Gel'fand-Shilov spaces of type S. The continuous fractional wavelet transform is defined involving the fractional Hankel transform. The continuity of fractional Hankel wavelet transform is discussed on Gel'fand-Shilov spaces of type S.
arxiv +1 more source
Walsh-Hadamard transform for complex-valued signals
Electronics Letters, 1992 The basis functions of the Walsh–Hadamard transform are real-valued whereas most signals in digital signal processing have in-phase and quadrature components. A Walsh–Hadamard power spectrum of a complex-valued sequence is defined, with the aim of obtaining a Fourier-like power spectrum using fewer computations.
B. Arambepola, K.C. Partington
openaire +2 more sources
New fast Walsh–Hadamard–Hartley transform algorithm
International Journal of Electrical and Computer Engineering (IJECE), 2023 <span lang="EN-US">This paper presents an efficient fast Walsh–Hadamard–Hartley transform (FWHT) algorithm that incorporates the computation of the Walsh-Hadamard transform (WHT) with the discrete Hartley transform (DHT) into an orthogonal, unitary single fast transform possesses the block diagonal structure. The proposed algorithm is implemented
Suha Suliman Mardan, Mounir Taha Hamood
openaire +1 more source
Journal of Electrical and Computer Engineering, Volume 2025, Issue 1, 2025.Orthogonal frequency division multiplexing (OFDM) is a widely used modern communications technology due to its resistance to selective frequency fading and efficient use of spectrum. However, the security of OFDM signals remains a source of serious concern, especially in the face of network encryption that aims to disrupt communications or extract ...
Ammar Mohammedali Fadhil +2 more
wiley +1 more source
A Closer Look into Transformer-Based Code Intelligence Through Code Transformation: Challenges and Opportunities [PDF]
arXiv, 2022 Transformer-based models have demonstrated state-of-the-art performance in many intelligent coding tasks such as code comment generation and code completion. Previous studies show that deep learning models are sensitive to the input variations, but few studies have systematically studied the robustness of Transformer under perturbed input code. In this
arxiv
A Mathematical Model, Implementation and Study of a Swarm System [PDF]
Robotics and Autonomous Systems, Vol. 58, Issue 3, 2010, pp.
287-294, 2013 The work reported in this paper is motivated towards the development of a mathematical model for swarm systems based on macroscopic primitives. A pattern formation and transformation model is proposed. The pattern transformation model comprises two general methods for pattern transformation, namely a macroscopic transformation and mathematical ...
arxiv +1 more source
A novel carrier index M‐ary differential chaos shift keying modulation scheme
IET Communications, Volume 18, Issue 19, Page 1642-1649, December 2024.This paper proposes a novel carrier index M‐ary differential chaos shift keying modulation. By allocating part of the subcarriers to the chaotic reference for carrier index modulation and applying M‐ary DCSK modulation to data‐bearing signals, more data bits can be delivered, resulting in increased bit rate and spectral efficiency. Besides, rather than
Yu‐Xuan Sun +3 more
wiley +1 more source