Results 191 to 200 of about 5,165 (219)
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1975
This chapter is devoted to the study of the Walsh-Hadamard transform (WHT), which is perhaps the most well-known of the nonsinusoidal orthogonal transforms. The WHT has gained prominence in various digital signal processing applications, since it can essentially be computed using additions and subtractions only. Consequently its hardware implementation
Nasir Ahmed, Kamisetty Ramamohan Rao
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This chapter is devoted to the study of the Walsh-Hadamard transform (WHT), which is perhaps the most well-known of the nonsinusoidal orthogonal transforms. The WHT has gained prominence in various digital signal processing applications, since it can essentially be computed using additions and subtractions only. Consequently its hardware implementation
Nasir Ahmed, Kamisetty Ramamohan Rao
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Lossless 2D discrete Walsh-Hadamard transform
2001 IEEE International Conference on Acoustics, Speech, and Signal Processing. Proceedings (Cat. No.01CH37221), 2002The 64-point separable lossless two dimensional (2D) WHT is composed of the 8-point lossless one dimensional WHT. The latter is obtained by first decomposing the 8-point WHT into 2-point WHTs and then replacing every 2-point WHT by a ladder network. Since the coefficients in the ladder network then become real, the advantage of being multiplier-free ...
K. Komatsu, K. Sezaki
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Recursive discrete Walsh-Hadamard transformation
Proceedings of the IEEE, 1983New 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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Analysis of Walsh-Hadamard Transformation with CFBMC Communication
2021 International Conference on Artificial Intelligence and Smart Systems (ICAIS), 2021As 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 +2 more
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Recursive computation of Walsh-Hadamard transformations
Signal Processing, 1985Abstract 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., 2004In 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 +5 more
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Robust Walsh–Hadamard transform-based spatial modulation
Digital Signal Processing, 2017This 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
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STC-GFDM systems with Walsh-Hadamard transform
2016 IEEE International Conference on Electronic Information and Communication Technology (ICEICT), 2016Generalized 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 +3 more
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Walsh–Hadamard Transforms: A Review
2017Abstract 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.
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Cache miss analysis of Walsh-Hadamard transform algorithms
2021Processor 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 +1 more
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