Top new questions this week:
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i am currently attempting system identification using the LMS algorithm. The input and the output data are available and are very noisy and consists of multiple frequencies. The input and the output …
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I am reading the book “Detection of Signals in Noise” by Robert N McDonough, A D Whalen. In chapter 10, they compute the gradient of the log-likelihood for the time of arrival. See attached …
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I’m trying to solve the following problem: Consider a linear time-invariant filter with linear phase: $$H(e^{j\omega}) = a_0 + \sum_{i = 1}^{N} 2a_k\cos(k\omega)$$ Determine the coefficients of this …
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We know that $$x(t) \star h(t) = y(t) $$ and $$X(\omega)H(\omega) = Y(\omega).$$ But in real world, $X(\omega)$ and $H(\omega)$ are DFTs. So to prevent circular convolution, we do zero padding before …
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I am reading a paper Recovery of Future Data via Convolution Nuclear Norm Minimization. Here, I know there is a definition for convolution matrix. Given any vector $\boldsymbol{x}=(x_1,x_2,\ldots,x_n)^…
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I’m working on a little audio/embedded systems project, and I’m using synthesis to generate waveforms and feeding them into DAC and speakers. Currently, I am able to produce sine waves of individual …
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I don’t understand what stationarity of random process mean. I know they’re statistical properties that are time invariant but I don’t have intuition for it and I don’t get what that has to do with …
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Greatest hits from previous weeks:
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In an answer to a previous question, it was stated that one should zero-pad the input signals (add zeros to the end so that at least half of the wave is “blank”) What’s the reason for this?
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Is there any existing application to sample someone’s voice and use it to modulate any other voice or synthesize a text to resemble the original one? For example, this Text-to-Speech Demo by AT&…
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What is the difference between feature detectors and feature descriptors? Which among these are detectors and which are descriptors: Harris, SURF, Min Eigen, FAST, SIFT, BRISK
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Both 4QAM and QPSK apparently produce the same waveform, but are they the same mathematically? In a QPSK constellation, are the mapping points at 45, 135, 225 and 315 degrees while the 4QAM is at 0, …
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I am new in matlab and signal processing. The time series that have been used are obtained from accelerometer in a building. As far as I understand both the time series’ length and window function …
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The classical definition of orthogonality in linear algebra is that two vectors are orthogonal, if their inner product is zero. I thought this definition might be applied to signals as well, but then …
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Hi i’m a beginner in signal processing i want to know what’sthe pass band ripple and stop band attenuation of a digital filter ? Thanks.
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Can you answer these questions?
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The transfer function and the input output data of the system are known. The transfer function is given by $$G(s) = \frac{K}{(Js+b)(Ls+R)+K^2}$$ How are the parameters of the transfer function …
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I have created a 2D matrix with L as the number of samples and K as the number of chirps. Now I am trying to plot the Range-Doppler response which doesn’t correspond to the correct range and velocity …
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ARMA basically is an AR model which considers past inputs to the filter as well. But what is the benefit of taking past inputs to the filter if we are considering real-time processes which are all …
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