# Questions tagged [signal-analysis]

The tag has no usage guidance.

1,620 questions
Filter by
Sorted by
Tagged with
6 views

### Maximum Value of DSNR in Detection of Signals in Noise Second Edition

I am interested in problem 8.5 of Detection of Signals in Noise, Second Edition. The problem calls for finding the maximum value of DSNR. I have done so, but my solution does not agree with the ...
118 views

### application of wavelet to vibration signal

I ask you to help me to interpret this figure corresponding to a diagnosis of gear failure using CWT (Haar); I have already worked on the analysis of the vibratory signals using the FFT; But since the ...
134 views

### Distinguish between sinusoidal oscillations and rythmic pulses

I want to distinguish between a sinusoidal oscillations and rythmic pulses. Which method can i use to do that? I want to implement a detector that can distinguish between this two types of signals. ...
91 views

### GPS Code Phase usage

During Cross-correlation process: xcorr=ifft(fft(a)fft(b)∗) we have frequency offset and code phase offset. How is it used later in the process of finding a ...
179 views

### Overlapping power-of-cosine windows with constant weight

I would like to refer you to a relevant question I posed on the Math StackExchange: A generalisation of the Pythagorean trigonometric identity. As can be seen from the question and the answer, what ...
53 views

133 views

### A-weighted Digital Filter for 1/3rd Octave Band Analysis

I want to do a 1/3rd Octave band analysis on a noise signal. But the sound pressure levels should be in dB(A), i.e., and it should be A-weighted. For this, I am using the A-weight function from this ...
18 views

### How NLMS/LMS adaptive filter used for noise reduction acts on input signal with low frequencies(DC offset/baseline wander)?

I am using Matlab to implement a real-time adaptive filter of length 4 for noise cancellation using the NLMS method/ I also tried the LMS method. My aim is to denoise biomedical signals, and for the ...
24 views

### How to determine a suitable threshold when using amplitude thresholding method for spike detection?

I have seen number of approaches that have been introduced in the literature for spike detection including, amplitude thresholding method, Nonlinear Energy Operator method, and template matching ...
29 views

### simulation of lin-log amplification

I struggle with two simple questions. First. What is the distribution of the signal on the output of the lin-log amplifier if Rayleigh noise is driven to the input of it. Using an approach with ...
29 views

### Spatial frequency and video frequency of an image

in my lecture notes about image sensors (CCD, precisely) I have read the following statement: The transfer function $F(\omega)$ of the image sensor is related to its spatial resolution function \$F(\...
27 views

### Extracting rms delay, delay spread, and CIR from power delay profile

I have a spread spectrum channel sounder running the following transmitter and receiver: When running it over the air (~2km), I get the plot of the correlator output: I can see that there are peaks ...
263 views

### Threshold for peak detection of noisy signal in frequency domain

I have a noisy signal (Gaussian Noise) with a known SNR and known Noise variance. This signal contains a number of Frequency components. My ultimate objective is to detect the components of the signal....
44 views

### Sine Dipole formation using two hydrophones

I am trying to do MATLAB simulations for generation of SINE Dipole using two hydrophones spaced distance 'd' apart for signal coming from direction 'DOA'. The MATLAB code is given below. The confusion ...
481 views

### Why does the addition of noise improve coherence between two signals?

Taking a simple example of the coherence between two signals, each composed of two sinusoids of frequency 100 and 200 Hz, I expect the coherence to show two peaks in the spectrum located at precisely ...
31 views

### Power Spectrum analysis arbitrary length signals

I have signals belonging to diseased and healthy samples recorded from multiple electrodes. These signals are taken monthly and are of arbitrary length (say 4-5 mins). I am planning to do a power ...