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weight = 7 | ||
archetype = "chapter" | ||
title = "Digital Signal Processing" | ||
date = "2023-05-29T16:50:01-05:00" | ||
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Digital Signal Processing is the discrete realization of Analog Signal Processing | ||
operations used to condition, amplify, characterize, and transform. | ||
Digital Signal Processing is essential when interfacing a digital computer | ||
to a physical process to enable reproducible and high-fidelity applications. |
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weight = 2 | ||
title = "Signal Conditioning" | ||
date = "2023-05-29T16:55:11-00:00" | ||
toc = true | ||
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tags = [ "dsp", "algorithm", "signal-conditioning" ] | ||
categories = [ "dsp", "conditioning" ] | ||
series = [ "Digital Signal Processing" ] | ||
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Signal conditioning is the act of making signals more robust for further processing. | ||
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weight = 3 | ||
title = "Digital Filters" | ||
date = "2023-05-29T16:57:39-00:00" | ||
toc = true | ||
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tags = [ "dsp", "algorithm", "filtering" ] | ||
categories = [ "dsp", "filtering" ] | ||
series = [ "Digital Signal Processing" ] | ||
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Digital Filtering is the act of focusing a signal to key features for observation. | ||
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weight = 4 | ||
title = "Identification" | ||
date = "2023-05-29T16:58:21-00:00" | ||
toc = true | ||
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tags = [ "dsp", "algorithm", "identification" ] | ||
categories = [ "dsp", "identification" ] | ||
series = [ "Digital Signal Processing" ] | ||
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Identification is the act of recognizing the signal in the presence of noise. | ||
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When there are signals and noises, physicists try to identify signals by modeling them, | ||
whereas statisticians oppositely try to model noise to identify signals. In this study, | ||
we applied the statisticians' concept of signal detection of physics data with small-size | ||
samples and high dimensions without modeling the signals. Most of the data in nature, | ||
whether noises or signals, are assumed to be generated by dynamical systems; thus, there | ||
is essentially no distinction between these generating processes. We propose that the | ||
correlation length of a dynamical system and the number of samples are crucial for the | ||
practical definition of noise variables among the signal variables generated by such | ||
a system. Since variables with short-term correlations reach normal distributions | ||
faster as the number of samples decreases, they are regarded to be ``noise-like'' | ||
variables, whereas variables with opposite properties are ``signal-like'' variables. | ||
Normality tests are not effective for data of small-size samples with high dimensions. | ||
Therefore, we modeled noises on the basis of the property of a noise variable, that is, | ||
the uniformity of the histogram of the probability that a variable is a noise. | ||
We devised a method of detecting signal variables from the structural change of the | ||
histogram according to the decrease in the number of samples. We applied our method | ||
to the data generated by globally coupled map, which can produce time series data with | ||
different correlation lengths, and also applied to gene expression data, which are | ||
typical static data of small-size samples with high dimensions, and we successfully | ||
detected signal variables from them. |
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weight = 5 | ||
title = "Spectral Analysis" | ||
date = "2023-05-29T17:04:34-00:00" | ||
toc = true | ||
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tags = [ "dsp", "algorithm", "spectral-analysis" ] | ||
categories = [ "dsp", "analyzing" ] | ||
series = [ "Digital Signal Processing" ] | ||
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Spectral Analysis analyses the frequency components of a signal. | ||
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weight = 6 | ||
title = "Transforms" | ||
date = "2023-05-29T17:05:17-00:00" | ||
toc = true | ||
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tags = [ "dsp", "algorithm", "transforms" ] | ||
categories = [ "dsp", "transforming" ] | ||
series = [ "Digital Signal Processing" ] | ||
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Signal Transforms map the signal function to other functions for further analysis. | ||
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