Hi, I am trying to simulate on Matlab a Rayleigh channel for my OFDM signal. I am using the code below to generate the channel...

Hi, I am trying to simulate on Matlab a Rayleigh channel for my OFDM signal. I am using the code below to generate the channel coeficients. The output of this code is a matrix in this case: h = (modified_jakes1(100,2000,10,3,100,0)) is 100 coefficients and 3 multipath chanel.(is this correct?) how can i filter my time domain signal with these coefficient? any idea how to equilize the...

Hi guys, I m having a problem with matlab and i need your help. I have two output signals (let's say B and C) which are recordings of the...

Hi guys, I m having a problem with matlab and i need your help. I have two output signals (let's say B and C) which are recordings of the same physiological process, at symmetrical parts of the body, and the input signal A. To see if there is noise in my recordings, i m subtracting B and C , and calculating the magnitude squared coherence of DV=C-B to A. As expected the coherence is very...

Hello all, I have a problem regarding using viterbi decoder in wifi PHY. I try to use hmmviterbi in GNU Octave , for decoding soft data...

Hello all, I have a problem regarding using viterbi decoder in wifi PHY. I try to use hmmviterbi in GNU Octave , for decoding soft data (which was encoded with convolutional encoder with 3/4 rate) but met the following problem: How I can create the TRANSPROB (transition probability) and OUTPROB (output probability) matrices. Please help... Thanks in advance.

Hi all, nested functions do NOT work inside uicontrol callback. Try this example as an m-file: %%%%%%%%% start code: function file ttt.m ...

Hi all, nested functions do NOT work inside uicontrol callback. Try this example as an m-file: %%%%%%%%% start code: function file ttt.m %%%%%%%%%%%%%%%% function ttt uicontrol('Style', 'checkbox', 'Units','normalized', ... 'Position', [0.01 0.25 .08 .05],... 'Callback', ['mmm']); function mmm x=3 %%%%%% end of code %%%%%%%%%%%%%%%% Any tip? I do not ...

Hello all, I have a problem about period amplitude and phase distortion when performing a fourier trasform. The problem arise when I have two...

Hello all, I have a problem about period amplitude and phase distortion when performing a fourier trasform. The problem arise when I have two periods with different amplitude but very close. An example; I create one cosine function with period=90 amp=60 and phase 2.2 rad, another one with period= 75 amp=30 phase=1.1 and then sum togheter. If I perform an FT on this sum of cosines I get...

I am working on a school project, and I need to create a Linear phase, causal, digital Bandpass FIR filter using windowing methods. with the...

I am working on a school project, and I need to create a Linear phase, causal, digital Bandpass FIR filter using windowing methods. with the following specifications. Sampling fs= 24khz Passband freq= p1= 2*pi*4000, and p2= 2*pi*8000 rad/sec stopband freq= st1=2*pi*3000 st2=2*pi*9000 rad/sec Minimum stopband attenuation = 40db having the lowest possible filter length. I fou...

Hi all, Right now, I am doing simulations on a multiuser detection (MUD) for a synchronous MC/CDMA system.  In this case, I need to compare the...

Hi all, Right now, I am doing simulations on a multiuser detection (MUD) for a synchronous MC/CDMA system.  In this case, I need to compare the BER performances among several spreading sequences with various N-length i.e. Gold 31, Gold 32, Gold 64, Hadamard-Walsh 32, Hadamard-Walsh 64, Kasami 32, and Kasami 64.  Please anybody help me to tell me where (website) can I get all the PN codes.  I d...

What if the my images numbering is this format DSC_001, DSC_002,......DSC_500? how do I write alter the code to suit this? skeleton of the code...

What if the my images numbering is this format DSC_001, DSC_002,......DSC_500? how do I write alter the code to suit this? skeleton of the code shud b something like this for i = 1 : 500 fname = [pic num2str(i)]; image = imread(fname,'bmp'); % do contrast enhancement% imwrite(image,fname,'bmp'); end > > Hi, > > I have a specific problem in Image Processing. I have an i

Hi, have you get your answer? I am a beginner of this field. I am in a project that have to use the CIC filter. The gain of the filter also puzzle...

Hi, have you get your answer? I am a beginner of this field. I am in a project that have to use the CIC filter. The gain of the filter also puzzle me a lot. In matlab, I could just divide by 1/gain(CIC) before or after the CIC to scale the gain of this filter to 0 dB. But I don't know how to implement it in verilog or in the hardware. Also I don't know whether is it necessary. > > > > H

Can any body give me some reference how to generate PN sequence with required autocorrelation characteristics.If Pi is the sequence of length M ...

Can any body give me some reference how to generate PN sequence with required autocorrelation characteristics.If Pi is the sequence of length M PiPj = M if i =j PiPj = -1 else Thank you Rakesh