Results 171 to 180 of about 4,861 (197)

Parallel vector multidimensional slant, Haar, and Walsh-Hadamard transforms

Multidimensional Systems and Signal Processing, 1992
A new factorization for the slant matrix is developed. The structure of the proposed slant algorithm based on the new factorization is suitable for vector and parallel processing of one- and two-dimensional slant transforms. A unified approach to compute the Walsh-Hadamard, Haar, and slant transforms is presented.
El-Sharkawy, Mohamed, Aburdene, Maurice, Tsang, Wenlong   +2 more
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Modified Walsh-Hadamard Transform for PDL Mitigation

39th European Conference and Exhibition on Optical Communication (ECOC 2013), 2013
We propose a modified Walsh-Hadamard transform (MWHT) that reduces the PDL penalty by equalizing the performance of both polarization tributaries. The realization of MWHT requires just one piece of PMF and therefore exhibits a very low-cost PDL solution.
null Wei-Ren Peng, I. Morita, T. Tsuritani   +2 more
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A Walsh-Hadamard Transform LSI for Speech Recognition

IEEE Transactions on Consumer Electronics, 1982
Abstract- Speech recognition systems are coming to a practical stage thanks to the recent progress of the semiconductor technology. We have developed a low cost speaker-dependent speech recognition unit using Walsh-Hadamard transform (WIT). A WHT LSI has been developed to reduce the cost and the space of the recognition unit, and a high rate of ...
Hidefumi Ohga, Hidekazu Yabuuchi, Eiichi Tsuboka, Kazuaki Mayumi, Kozo Adachi, Osamu Nishijima   +5 more
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Digital filters based on recursive Walsh-Hadamard transformation

IEEE Transactions on Circuits and Systems, 1990
The applicability of the recursive Walsh-Hadamard transformation to FIR and IIR (finite- and infinite-impulse-response) filtering is investigated. It is shown that using a common structure for recursive transforms recently introduced by G. Peceli (1986), the usual frequency-domain FIR filtering problem can be easily converted into a Walsh sequency ...
G. Peceli, B. Feher
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Performance of Walsh-Hadamard transformed STBC OFDM system

2004 IEEE 59th Vehicular Technology Conference. VTC 2004-Spring (IEEE Cat. No.04CH37514), 2005
We study the performance of a Walsh-Hadamard transformed (WHT) space-time block coded (STBC) OFDM system, which we refer as the WHT-STBC-OFDM system. We show that, with the WHT transform, the error performance of the STBC coded OFDM system can be improved in terms of both bit error rate (BER) and packet error rate (PER) through simple linear detection.
null Wu Yan, null Zhongding Lei, null Sumei Sun   +2 more
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Relations between Haar and Walsh/Hadamard transforms

Proceedings of the IEEE, 1972
Relations between the Haar and Walsh/Hadamard (W/H) transforms, which are proved, show that for some applications the Haar transform performs as well as, and faster than, the W/H transform. These relations yield a family of orthogonal transforms including the Haar and W/H transforms with a common fast algorithm.
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Adaptive filtering using the fast Walsh-Hadamard transformation

IEEE Transactions on Electromagnetic Compatibility, 1989
A fast implementation of the least-mean-square error (LMS) adaptive transversal filter is proposed. The fast Walsh-Hadamard transform technique is adopted in this implementation. This filter is shown to promise a significant reduction in computation over both the conventional time-domain and the frequency-domain LMS adaptive filters. >
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Algorithm of Walsh-Hadamard Transform with Optical Approach

Journal of Information and Computational Science, 2013
In this paper, the fast algorithm to Walsh-Hadamard transform (WHT) is studied from the point of view of the optical computation. Firstly, MSD addition and butterfly calculation in discrete WHT are presented in detail. Then the design and implementation scheme of fast algorithm of WHT is proposed and the software simulations to fast WHT are carried out
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A parameterisable fast Walsh-Hadamard transform

2023
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Fast Transformations with Walsh-Hadamard Functions

1972
Title: Fast Transformations with Walsh-Hadamard Functions, Author: Frank Y.Y.
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