Results 171 to 180 of about 978,152 (207)

Recursive Algorithm for Sliding Walsh Hadamard Transform

IEEE Transactions on Signal Processing, 2014
In this paper, a recursive sliding transform (RST) algorithm is proposed for the fast implementation of the Walsh Hadamard Transform (WHT) on sliding windows. The proposed RST algorithm accelerates the sliding WHT process by recursively reducing the order of WHT.
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On Cyclic Autocorrelation and the Walsh-Hadamard Transform

IEEE Transactions on Electromagnetic Compatibility, 1973
It is shown that the complete set of circular shift invariants called the Q-spectrum, of the Walsh-Hadamard transform (WHT) of a periodic sequence is related to the cyclic autocorrelation of the given sequence through the Hadamard matrices. It is also shown that the modified WHT (MWHT) of the cyclic autocorrelation yields the Q-spectrum within some ...
Nasir Ahmed, Kamisetty R. Rao, A. L. Abdussattar   +2 more
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An FPGA implementation of Walsh-Hadamard transforms for signal processing

2001 IEEE International Conference on Acoustics, Speech, and Signal Processing. Proceedings (Cat. No.01CH37221), 2002
This paper describes two approaches suitable for an FPGA implementation of Walsh-Hadamard transforms. These transforms are important in many signal processing applications including speech compression, filtering and coding. Two novel architectures for the fast Hadamard transforms using both systolic architecture and distributed arithmetic techniques ...
Abbes Amira, Ahmed Bouridane, Peter Milligan, Mohammed Ali Roula   +3 more
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Optical Walsh-Hadamard transform for orders 32 and 64

Applied Optics, 1988
A coherent optical system composed of a holographic mask and two Fourier lenses is described for performing an arbitrary linear transform. A set of equations for determining the amplitude-phase distribution of the mask is given. As a specific transform, the Walsh-Hadamard transform for orders 32 and 64 is optically made in 1-D space.
Y S, Chen, S H, Zheng, B Z, Dong, D H, Li, G Z, Yang   +4 more
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A parameterisable fast Walsh-Hadamard transform

2023
The aim of this thesis was to create a parameterisable Fast Walsh-Hadamard Transform in the form of a robust intellectual property core. This paper provides background information on the Walsh-Hadamard Transform (WHT), reprogrammable hardware and the current state of the intellectual property (IP) industry.
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Robust Walsh–Hadamard transform-based spatial modulation

Digital Signal Processing, 2017
This paper presents a combination of spatial modulation (SM) and WalshHadamard transform (WHT) for achieving robustness against wireless fading channels. The WHT operation merge together SM transmitting symbols, where the number of symbols depends on the order of WHT matrix.
Muhammad Irfan 0001, Soo Young Shin
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Recursive computation of Walsh-Hadamard transformations

Signal Processing, 1985
Abstract New techniques for Walsh-Hadamard spectral analysis are reported. Spectral coefficients are updated in real time with each new signal sample, and an eighth order illustrative numerical example is given.
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Iterative detection for Walsh-Hadamard transformed OFDM

The 57th IEEE Semiannual Vehicular Technology Conference, 2003. VTC 2003-Spring., 2004
In this paper, an iterative detection method is proposed to reduce the noise enhancement in Walsh-Hadamard transformed (WHT)-OFDM system. The iterative detection starts with conventional detection. The estimation of the received signal at the weakest subcarrier is calculated based on the detection of all data symbols after the hard decision or a ...
null Zhongding Lei, null Yan Wu, null Chin Keong Ho, null Sumei Sun, null Ping He, null Yuan Li   +5 more
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Recursive discrete Walsh-Hadamard transformation

Proceedings of the IEEE, 1983
New techniques for Walsh-Hadamard spectral analysis are reported, for which spectral coefficients are updated in real time with each new signal sample.
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Spatial multiplexing using walsh-hadamard transform

2016 International Conference on Smart Green Technology in Electrical and Information Systems (ICSGTEIS), 2016
This paper proposes a model (WHT-SMX), that combines spatial multiplexing (SMX) with walsh-hadamard transform (WHT). The use of WHT is to convert transmit symbols of SMX to change location of constellation points. This is helpful in extending the Euclidean distance between transmit symbols for precise detection.
Man Hee Lee, Muhammad Basit Shahab, Md Fazlul Kader, Soo Young Shin   +3 more
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