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autocorrelate rows of matrix without using a for loop
You can use |FFT| if your data is large, e.g., ffta = fft(a,NFFT,2); b = fftshift(ifft(ffta.*conj(ffta),[],2),2) Choose yo...

más de 14 años hace | 0

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Median Frequency
If I understand correctly, you want to find the frequency below which you have 50 percent of the signal power. If that's the cas...

casi 15 años hace | 0

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Fourier transform of text data
You need to first load data into MATLAB and then perform FFT. Assume that each column is a different data set, you can do someth...

casi 15 años hace | 0

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Converting FIR Filter Coefficients to Floating data type
Hi Vivek, You can either create a dfilt object using these coefficients and then change the Arithmetic property, see doc...

casi 15 años hace | 0

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Chebyshev Type I low pass filter design
Hi Mehrdad, Like you mentioned, you need to know the passband ripple. You may be able to treat your cutoff frequency as the p...

casi 15 años hace | 0

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ifft returns a complex signal from a real fft spectrum; i desire a real signal
Hi Jeff, There is no guarantee that the real spectrum will generate a real signal. Between time domain and frequency domain, if...

casi 15 años hace | 1

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implementation filter gaussian in matlab...
Hi Megah, The following function should be helpful >> doc gaussfir >> doc filter HTH

casi 15 años hace | 0

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how to design a fir filter by the frequency response curve.
This is basically a frequency response synthesis problem. If you have Signal Processing Toolbox, take a look at the following do...

casi 15 años hace | 0

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Sinewave analysis in LPF
You can do that too, since firpm gives an FIR filter.

casi 15 años hace | 0

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3D spherical histogram
Hi Abhinendra, You can convert it to rectangular coordinate and then do the surface plot. You just need to make sure that you...

casi 15 años hace | 0

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Sinewave analysis in LPF
Hi Venkatesh, I don't quite understand your question. Since you already used firpmord and firpm, then you already have the or...

casi 15 años hace | 0

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amplitude of FFT output high compared to input
Hi rekh, You may find the following tech note useful: http://www.mathworks.com/support/tech-notes/1700/1702.html HTH

casi 15 años hace | 0

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fdesign and design list of available arguments
Hi Neal, Using your example, you can find the relevant design methods by invoking following command in the command window ...

casi 15 años hace | 0

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Need some help setting up a function for elementary data filtering
You can use logical index to do this. For example, to achieve the first task, you can do something like x = ones(5,4); x...

casi 15 años hace | 0

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Modeling and simulating a signal with an autoregressive model
Hi Walid, If you know parameter a1,a2,..,ap, I think the simplest way to simulate an AR process is 1. Create an IIR filter...

casi 15 años hace | 0

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Finding a string in a file
Hi osminbas, You could write a script to achieve this. You can use |cd| to change directories, |what| to list all the files i...

casi 15 años hace | 1

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Blackman FIR bandpass filter design
Hi olga, There is a subtle difference between the specification of an IIR filter and an FIR filter. Because you are designing a...

casi 15 años hace | 0

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number^matrix plz help me on this, I cant understand this, plz help me
Hi ailya, As Teja mentioned above, the key thing to understand is a^x can be expanded using Taylor series. The second piece t...

casi 15 años hace | 0

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How to navigate between directories during program execution?
Hi Yashar, The following command may be of your interest doc run doc fullfile HTH

casi 15 años hace | 0

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Code to Set the Number of Spectral Lines of an FFT(Freq Resolution)
Hi Anshul, I think there are two things you need to consider: 1. To get the perfect spectral line for your 60 Hz signal, y...

casi 15 años hace | 0

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adaptfilt functions
Hi Peter, Maybe I understand it wrong but you cannot directly change LMS filter's coefficients because it is updated in each ...

casi 15 años hace | 0

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Output Length of signal filtered using FIR Filters
Hi Sanket, You are correct that if you do convolution, you get a sequence longer than your original signal. However, those ex...

casi 15 años hace | 1

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phased array toolbox
Hi Matthew, Could you be more specific about the issues you encounter? Thanks.

casi 15 años hace | 0

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Cross correlation vs Matched Filter
I think the term "matched filter" focuses more on the fact that it maximize the SNR. Cross correlation can be considered as one ...

casi 15 años hace | 0

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Question about FFT
Hi itsik, When you do IFFT to get 1000 samples, it simply pads zero at the end. So when you do fft back, just take the first ...

casi 15 años hace | 3

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Butterworth filter
Hi Federico, Butterworth filter is an IIR filter, so you will need to get the denominator too, i.e., using the syntax [B...

casi 15 años hace | 0

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beamforming
You can also check out the new Phased Array System Toolbox. It has many beamforming algorithms. http://www.mathworks.com/prod...

casi 15 años hace | 0

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Converting Analog Filter into Digital Filter
Hi Royi, When you use Bilinear transform to convert an analog filter to a digital filter, you need to consider the effect of ...

casi 15 años hace | 0

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1D Gaussian Filter using FFT
Hi SM, From the code you posted here, my suspect is that you did not use enough points in your FFT to remove the aliasing. No...

alrededor de 15 años hace | 0

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Need to convert data from two sensors to the same sampling rate
If you have Filter Design Toolbox or DSP System Toolbox, you may want to take a look at the documentation for |fdesign.rsrc|, it...

alrededor de 15 años hace | 0