Tagged Questions
2
votes
0answers
37 views
Frequency analysis and classification of sound signal in Matlab [closed]
I am having some problems with a task in signal processing. The idea is to analyze a sound signal, containing the sound of someone dialing a phone number on an old-fashioned analog phone line. The ...
0
votes
1answer
43 views
Plot an eye diagram of a signal in MatLab
The matrix X contained in a .mat file represents the acquired signal. The element of place (i, j) of the matrix is the i-th sample of the j-th screen. The sampling frequency is equal to 4 GS/s.
How do ...
-3
votes
0answers
21 views
Use of kaiser window [closed]
Can anybody help me to use kaiser window in matlab, I know that it is used to suppress unwanted smaller peaks in plot. Although i am using it in my code but there is no effect on plot
0
votes
1answer
27 views
AR model lattice implementation
I'm trying to go through the procedure of Speech Synthesis via AR model, or LPC synthesis, IIR all-pole filter model, what ever you call it.
The main idea is to get the auto-correlation(AR) ...
0
votes
1answer
67 views
Frequency representation using discrete wavelet transformation
I am trying to use wavelet transform to represent song in frequency domain using discrete wavelet transform to made decomposition and made the frequency of the singer in place the the song using ...
0
votes
2answers
51 views
Adding high frequency noise to images in matlab
The function 'imnoise' adds noise to the image. But how can i add only high frequency noise?
2
votes
2answers
40 views
generate 100 sample at given rate
i want to generate 100 samples of sinusoid in matlab with frequency 0.2Hz and sampling rate 2Hz. ,for this i used following code
f=0.2;
fs=2;
A=100;%suppose that amplitude is 100
q=20;
...
-3
votes
2answers
53 views
Image as a signal representation [closed]
I have an image A(RGB) and B which is a gray scaled 256*256 size. How does one represent a gray scaled and an RGB image as a signal with X axis showing the time and Y axis the amplitude or the values? ...
1
vote
1answer
153 views
Simple bandpass filter in java
I am trying to write a simple band pass filter following the instructions in this book. My code creates a blackman window, and combines two low pass filter kernels to create a band pass filter kernel ...
0
votes
1answer
43 views
PIV Analysis, Interrogation Area of The Cross Correlation
I'm running a PIV analysis on two consecutive images taken during an experiment to get the vector field. But I would like to know, based on what criteria do I have to choose the percentage of overlap ...
0
votes
1answer
81 views
DSP FFT fundamental frequency wav file
I have a FFT algorithm in C# and I generate sine wave in a buffer at a frequency of 440, FS=1600 and Window length of 2048.
Before sending the signal to the FFT, I double the window length and put ...
0
votes
3answers
120 views
Finding zero crossing that are going positive and zero crossing that are going negative
I have a signal that I would like to copy when it:
1) starts at zero crossing going positive
2) copy a set number of points (like 8000)
3) and after the 8000 points are copied continue appending ...
0
votes
1answer
62 views
How calculate three phase kilowatt hour from time sampled data [closed]
My problem is I want to calculate three phase power from time sampled data of current and voltages.
My questions:
How can I calculate the energy (unit kilowatt hour) from time sampled data? Are any ...
0
votes
1answer
85 views
Weird frequency when plotting the recorded sound
I have a generated noise stored in a WAV file, I'm going to play it on an Android smartphone with speaker and record the sound and save it as another WAV file using the same smartphone(just 2 separate ...
android
2
votes
1answer
419 views
16-QAM modulation and demodulation
I am trying to do modulation and demodulation for 16-QAM and then trying to compare theoretical and simulated BER. I am not getting simulated graph. I can not understand what is wrong with my code. ...
