Results 161 to 170 of about 4,861 (197)

Analysis of Walsh-Hadamard Transformation with CFBMC Communication

2021 International Conference on Artificial Intelligence and Smart Systems (ICAIS), 2021
As per tomorrow’s need of fast paced technology, abundant research is required for the advanced communications. The proposed paper discusses about the theoretical observation and comparison of 5G techniques with respect to Walsh-Hadamard Transformation (WHT). It is a precoding algorithm of Circular Filter Bank Multi Carrier (CFBMC). There are the other
Dharmavaram Asha Devi, Yeshala Siri Chandana, Manda Akshitha   +2 more
openaire   +1 more source

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.
openaire   +1 more source

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
openaire   +1 more source

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.
Mohammad Irfan, Soo Young Shin
openaire   +1 more source

STC-GFDM systems with Walsh-Hadamard transform

2016 IEEE International Conference on Electronic Information and Communication Technology (ICEICT), 2016
Generalized Frequency Division Multiplexing (GFD-M) is a promising candidate waveform for the air interface of the fifth generation (5G) communication networks. The combination of GFDM and time-reversal space-time coding (TR-STC) can improve the bit error rate (BER) performance.
Wei Zhang, Zhimin Zhang, Jipeng Jia, Lin Qi   +3 more
openaire   +1 more source

Walsh–Hadamard Transforms: A Review

2017
Abstract The Walsh–Hadamard Transforms refer to a series of transforms related to Walsh functions and Hadamard matrix. These transforms have numerous applications in different areas of engineering and science. There are many versions of the Walsh–Hadamard Transform.
openaire   +1 more source

Cache miss analysis of Walsh-Hadamard transform algorithms

2021
Processor speed has been increasing at a much greater rate than memory speed leading to the so called processor-memory gap. In order to compensate for this gap in performance, modern computers rely heavily on a hierarchical memory organization with a small amount of fast memory called cache.
Mihai Alexandru Furis, Jeremy Russell Johnson   +1 more
openaire   +1 more source

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
openaire   +2 more sources

A bit level systolic array for Walsh-Hadamard transforms

Signal Processing, 1993
Abstract The Walsh-Hadamard transforms are very important in image data compression, filtering and design of codes. Recently, a systolic array for the Hadamard transform was developed for the speed of computation. However, it requires the addition or subtraction of the input samples in word level.
Chang, Long-Wen, Wu, Ming-Chang
openaire   +2 more sources

ECG Biometric Analysis Using Walsh–Hadamard Transform

2018
The electrocardiogram (ECG) signal expresses unique cardiac features among individuals. This paper proposes a novel method to human identification using ECG. The proposed method utilizes a band-pass filter for quality check and autocorrelation (AC) for feature extraction.
Ranjeet Srivastva, Yogendra Narain Singh
openaire   +1 more source