## generating random waveform with gussian pdf

Started by in Matlab DSP15 years ago 1 reply

Good day all, Want to make a program that generate a random waveform with a Gaussian pdf of zero mean and 2 Volts rms. Using vector of length...

Good day all, Want to make a program that generate a random waveform with a Gaussian pdf of zero mean and 2 Volts rms. Using vector of length 2048 and let the voltage values in the vector represent samples taken at 1millisecond intervals, so that the total duration of the signal is 2048 millisecond. plot the results waveform calculate the mean-square value of the wave form I kno...

## phase of rayleigh envelop

Started by in Matlab DSP14 years ago 2 replies

hi i have written matlab code for rayleigh fading using BPSK and QPSK i generate a rayleigh distribution by generating two identiaccly...

hi i have written matlab code for rayleigh fading using BPSK and QPSK i generate a rayleigh distribution by generating two identiaccly independently generated gaussian vectors and than i take a absolute value of it that gives me a rayleigh distribution..than i multiply this value with transmitted signal that gives me a rayleigh fading signal..that means i multiply amplitude of rayleigh envelop ...

## SIGNAL TO NOISE RATIO

Started by in Matlab DSP13 years ago 3 replies

Hi All, I have a set of noise data , x= [1 2 3 4 5 6 ]. I want to add additive white Gaussian noise to it using g= x+ 0.5*...

Hi All, I have a set of noise data , x= [1 2 3 4 5 6 ]. I want to add additive white Gaussian noise to it using g= x+ 0.5* rand(1,6) How do i calculate the signal to noise ratio of this signal if the variance of the rand is 0.5. I know the relationship between SNR and variance, mathematicallly and can implement that in MATLAB. Is there any function that can calculate that easily ...

## Doppler Power Spectrum Density

Started by in Matlab DSP13 years ago

Dear all, I am trying to generate a noise channel for a synchronous downlink MC-CDMA through a zero-mean complex Gaussian process through a...

Dear all, I am trying to generate a noise channel for a synchronous downlink MC-CDMA through a zero-mean complex Gaussian process through a designed filter whose power spectrum density (PSD) is shaped as classic Doppler PSD. The symbol rate, Rs, which is the chip rate over N subcarriers is set to 3.84Mchip/s.? I have considered a normalized Doppler frequency of fdT = 0.001 where T is the durat...

## pulse propagation in dispersion media.

Started by in Matlab DSP16 years ago

I have a program about the pulse propagation The program is: I have a input gaussian pulse ,the form is A(0,t)=E0*exp[-(t-t0) ...

I have a program about the pulse propagation The program is: I have a input gaussian pulse ,the form is A(0,t)=E0*exp[-(t-t0) ^2/T^2]*exp[i*wc*t] and it's fourier transform form is A(0,w)=sqrt(2*pi)*T*E0*exp[- 1/2*T^2*(w-wc)^2], now when the pulse propagation along the z direction ,and in position z, the spectrum is

## imwrite grayscale output--very basic question

Started by in Matlab DSP15 years ago 4 replies

Hi. I'm just starting to use matlab to make stimuli so this is a very basic question. I have used matlab to create a gaussian image and now i...

Hi. I'm just starting to use matlab to make stimuli so this is a very basic question. I have used matlab to create a gaussian image and now i want to export it. the progblem is that if i use the imwrite command: > > imwrite(ans, 'pic2.jpg'); The resultant output is BW and i need it to be grayscale. How do i output in grayscale? thanks for the help. t

## Finite Field Arithmetic:Matlab

Started by in Matlab DSP16 years ago 1 reply

I would like to know if there is any toolbox in MATLAB which can do finite field arithmetic. For instance i would like to perform...

I would like to know if there is any toolbox in MATLAB which can do finite field arithmetic. For instance i would like to perform Gaussian elimination on Matrices with entries from GF(2). G.Susinder Rajan MSc(Engg) IISc www.geocities.com/susinderrajan

## TRAINING A MIMO-RBF NEURAL NETWORK FOR SYSTEM IDENTIFICATION

Started by in Matlab DSP18 years ago

DEAR ALL I AM TRYING TO IDENTIFY THE DYNAMICS OF A 3-INPUT , 3-OUTPUT INDUSTRIAL EVAPORATOR IN A RBF NEURAL NETWORK WITH 14...

DEAR ALL I AM TRYING TO IDENTIFY THE DYNAMICS OF A 3-INPUT , 3-OUTPUT INDUSTRIAL EVAPORATOR IN A RBF NEURAL NETWORK WITH 14 DIFFERENT I/O SAMPLES AS THE NETWORK INPUT, 10 HIDDEN, GAUSSIAN NEURONS AND 3 LINEAR OUTPUT NEURONS . I WANT TO IMPLEMENT EITHER LEVNBERG-MARQUARDT OR SIMPLE B

## MIMO-OFDM BER verification

Started by in Matlab DSP14 years ago 3 replies

Hello everyone. I'm building a MIMO-OFDM simulator. Can I have some discussion with anyone interested in this,please? For example, I'm...

Hello everyone. I'm building a MIMO-OFDM simulator. Can I have some discussion with anyone interested in this,please? For example, I'm buildiing a 4-by-4 MIMO-OFDM simulator. Then, what is the best way I can verify the BER of my MIMO-OFDM simulator? Since I use 64-PSK, I assumed that, if I adopt a Gaussian channel for MIMO-OFDM with 64-PSK, then the BER will be the same as 64-PSK in AWGN...

## PSD of white noise generated by wgn function

Started by in Matlab DSP13 years ago

Hi, all, I would like to generate a white noise of which the PSD is 1( flat over all frequency domain). I used wgn function to get...

Hi, all, I would like to generate a white noise of which the PSD is 1( flat over all frequency domain). I used wgn function to get it: w=wgn(1,10000,1,'linear'); By setting p=1 and power type as linear, does it mean that this white gaussian noise has power=1? Then I did simple experiment to check its PSD. I used periodogram function without any window: [p,ww]=periodogram(w); figure; plot...