Results 31 to 40 of about 4,861 (197)
Two-Stage and Walsh Interleavers for Interleave Division Multiple Access Systems [PDF]
Engineering and Technology Journal, 2014 Interleavers are essential system components for interleave division multiple access (IDMA). In this paper, two-stage interleavers are proposed based on two optimization criteria combines minimum spreading distance with regular permutation and ...
Muayad Sadik Croock
doaj +1 more source
A Walsh-Fourier approach to the circulant Hadamard conjecture [PDF]
, 2014 We describe an approach to the circulant Hadamard conjecture based on Walsh-Fourier analysis. We show that the existence of a circulant Hadamard matrix of order $n$ is equivalent to the existence of a non-trivial solution of a certain homogenous linear ...
B Schmidt +6 more
core +2 more sources
Discrete Hartley matrix transform precoding-based OFDM system to reduce the high PAPR
ICT Express, 2019 The high peak-to-average power ratio (PAPR) is one of the major drawbacks of the orthogonal frequency division multiplexing (OFDM) systems that make non-linear distortion in practical implementation of high power amplifier (HPA).
Abbas Ali Sharifi
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Integral Attacks on Midori64 [PDF]
Jisuanji gongcheng, 2021 Proven to be an important key recovery method,the technique of integral attacks has been widely used in the analysis of block ciphers.This paper describes an attempt at integral attacks on the lightweight block cipher,Midori64.Three 6-round zero ...
WANG Chao, CHEN Huaifeng
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Wavelets and Wavelet Packets on Quantum Computers [PDF]
, 1999 We show how periodized wavelet packet transforms and periodized wavelet transforms can be implemented on a quantum computer. Surprisingly, we find that the implementation of wavelet packet transforms is less costly than the implementation of wavelet ...
Klappenecker, Andreas
core +2 more sources
Realization of generalized quantum searching using nuclear magnetic resonance
, 2001 According to the theoretical results, the quantum searching algorithm can be generalized by replacing the Walsh-Hadamard(W-H) transform by almost any quantum mechanical operation.
C. Zalka +13 more
core +1 more source
A Novel Autofocus Measure Based on Weighted Walsh-Hadamard Transform
IEEE Access, 2019 The autofocus measure plays an important role in passive digital imaging systems. However, most of the existing methods are more sensitive to the noise. In order to overcome this drawback, we proposed a novel autofocus measure based on the weighted Walsh-
Liqiang Guo, Xiang Cao, Lian Liu
doaj +1 more source
Quantum Mechanics helps in searching for a needle in a haystack [PDF]
, 1997 Quantum mechanics can speed up a range of search applications over unsorted data. For example imagine a phone directory containing N names arranged in completely random order.
A. Elitzur +6 more
core +3 more sources
Computationally Efficient Robust Color Image Watermarking Using Fast Walsh Hadamard Transform
Journal of Imaging, 2017 Watermark is the copy deterrence mechanism used in the multimedia signal that is to be protected from hacking and piracy such a way that it can later be extracted from the watermarked signal by the decoder.
Suja Kalarikkal Pullayikodi +3 more
doaj +1 more source
A Walsh-Based Arbitrary Waveform Generator for 5G Applications in 28nm FD-SOI CMOS Technology
IEEE Access, 2023 This paper presents the first Arbitrary Waveform Generator (AWG) based on Walsh’s theory for wideband radio frequency (RF) conversion. The architecture is dedicated to 5G-FR1 applications (sub-6GHz) to perform a direct and large bandwidth ...
Pierre Ferrer +3 more
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