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# Frequency Domain Matlab

102 Threads found on edaboard.com: Frequency Domain Matlab

## Time and Frequency domain representation of spreading sequences

How can I generate orthogonal spreading sequences in Matalb in frequency and time domain? What properties a set of spreading sequences should have ? e.g in time domain x=randi(, 10,1); % time domain signal SprdSeq= rand(20,20); %% HOW to GENERATE ORTHOGONAL ? Spreadedsignal= SprdSeq *diag(x); In (...)

## Optimaizing function versus freq

Hi, get a square function in the frequency domain Yes, it wasn't clear to me that you want the square function in frequency domain. And yes, this makes a sinc function in time domain. But with your problem ... I can't help anymore. Klaus

## Can some one send me 2D FDFD code for study purpose?

Hello there, May anyone thankfully recommend a good reference to learn FDFD (finite difference frequency domain) for electromagnetic scattering problems ? I need a reference with matlab code examples (especially for 2D geometries) ! I would also be grateful if any one can send me a basic "1D or 2D FDFD scattering matlab (...)

## Exporting data from software defined radio firmware to matlab

Hi forum. I am using AFE822x SDR-Net (Dual Channel) software defined radio to receive the 10.7MHz RF signal. Bandwidth of a signal is around 2KHz. Does anybody knows a way do directly pass the downconverted RF signal in frequency domain to the matlab or .csv/.txt file for the further post-processing? I have tried to use the record (...)

## [Moved] conversion from frequency domain to time domain using matlab

This is the file in touchstone(S1P) format . It is in frequency domain .we need to convert it to time domain.we got it from Vector Network analyzer.And frequency rang is from 3 to 10 GHz. Total number of sample is 201.the S11 is in dB.the file contain three column first column contain frequency (...)

## how to use invers fourier tranformer on touchston /csv file in matlab to get in time

as i get s-parameter from vector network analyzer which is in frequency domain now i want to convert it to time domain using matlab tool.please tell me the code for using inverse Fourier transformer on it.

## Discrete Cosine Transform in Matlab for speech recognition using MFCC

Hello! I am working on Speech recognition using GMM and MFCC. I am having problem in finding DCT to transform log Mel scale cepstrum from frequency domain into time domain in matlab. Can any body help me? waiting for your kind responses.

## Need help with FDFD (Frequency domain) Method

Hi Dear all I have wrote a FDFD code in matlab. But, it doesn't work fine and there is reflections from the right and upper PML. The program is very simple and can be understood with a glance. Please, if you can, have a look to my code to see what is the problem. I have checked my code many times but I don't know what is the problem. Tell me if yo

## Apply window in frequency domain on Matlab

Hello In my OFDM system, I need to apply a Hamming and Blackman window in frequency domain. My simulation is on matlab. I've done a FFT of this window and did its convolution with my data in freq domain, but I'm not getting the desired results. :-( Can anyone help me to do this the correct way ? Thank you.

## first Mini dsp Project using matlab and books

If u have a matlab, u can simply type "help " and get all details of the command. For frequency domain, u need to use FFT. A simple radix-2 FFT is good enough for understanding and implementation. All the functions are already given in matlab. Usually during design, i use z-transform to find the TF of filter. (...)

## How to display frequency spectrum of time-domain signals with simlink/matlab

Hi; I need to display the power of the wave sorrce block for an RF systeme with simulink/matlab by using blokcs of how i can found this block that display power . I'm so gratefull

## Alamouti coded OFDM in time and frequency domain

Dear All I am lookinf for matlab code of Alamouti coded OFDM

## 2d channel estimation

hello friends... i need your help for making matlab code that is 2d channel estimation using two 1d channel estimation concept: the principle of channel estimation algorithms are introduced when a one-dimensional to two estimates (time domain and frequency domain) instead of frequency two-dimensional (...)

## IFFT code in octave or matlab

Hi, I have some channel measurement data obtained in the frequency domain using vector network analyzer (S21) and I need to obtain the time domain impulse response. The simplest thing that I tried is to take IFFT from my data (X). If someone can share with me some helpful templete of octave or matlab code in this regard. (...)

## SC-FDE continuous time transmission in MATLAB

Hello all, I would like to implement single carrier-frequency domain equalization (SC-FDE) in continuous time in matlab. In particular, I have the following: 1- The channel is given by: h(\tau)=\sum_{q=1}^Qh_q\delta(\tau-\tau_q) 2- The transmitted signal is given by: s(t)=\Re\left\{e^{j2 f_c t\pi}\sum_{k=0}^{K-1}s

## how to switch off some of the subcarriers in an ofdm system using matlab programme???

In the OFDM the signal is built in the frequency domain, that is subcarrier by subcarrier, then you'll take the IFFT of the whole subcarriers assembly. Just don't assign the subcarriers you want to be off and put them to zero.

## [MATLAB]single carrier frequency domain equalization in continuous time

Hello all, Can anyone help me implementing single carrier frequency domain equalization (SC-FDE) in continuous time in matlab, please? I have the math, but I don't know how to do it in matlab!! Thanks

## for increasing performance of antenna arrays using matlab

You need amplitude taper to reduce sidelobe levels. It is the same as using a window function in a Fourier Tranfsform to reduce side lobes in the frequency domain. Many antenna books cover taper function to get low side lobe levels. Search for Dolph and/or Chebyshev together with sidelobes This will lead you to other info. You may try to get a c

## psd of voltage waveform

Hello, I have voltage waveform in time domain. When I did fourier transform of the voltage, will I get power or PSD with respect to frequency?.

## import result to matlab(urgent)

Hi,how we can import cst microwave studio frequency domain solver results to matlab for plot curves?