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Orthogonal random matrix

Started by zulfiquar zab in Matlab DSP18 years ago 2 replies

Hi,     I want to generate orthogonal random matrix in matlab. How can I do it?   Cheers ZAB

Hi,     I want to generate orthogonal random matrix in matlab. How can I do it?   Cheers ZAB


Negative Random number generation

Started by Ishtiaque Ahmed in Matlab DSP18 years ago 2 replies

Hello, I need to generate random numbers, for example, in the range -20 to 20 or -150 to 150 or so for 1200 points. How can I do this using...

Hello, I need to generate random numbers, for example, in the range -20 to 20 or -150 to 150 or so for 1200 points. How can I do this using 'rand' function in matlab?? I got one way to do this from this forum, like: a = unifrnd (-2 , 2 , [1024,1]); and, it was said that rand is equivalent to unifrnd. So, I tried with rand but the warning says: Warning: Input...


plotting a random variable in matlab

Started by tpka...@hotmail.com in Matlab DSP19 years ago 1 reply

Hi All :) i need to plot the probability density function(pdf) of Z, given that Z = X + Y. X is exponentially distributed with mean x1, Y is...

Hi All :) i need to plot the probability density function(pdf) of Z, given that Z = X + Y. X is exponentially distributed with mean x1, Y is exponentially distributed with mean y1. X and Y are independent random variables. the pdf of Z is given by the convolution of the pdfs of X and Y. How can i plot the pdf of Z in Matlab? many thanks in advance :)


Generate a multi-level pseudo-random series

Started by Yimin zhou in Matlab DSP19 years ago

Dear all, I am wrting my thesis now and I need to generate a mult-level pseudo-random series to compare my method. Is there anyone possible to...

Dear all, I am wrting my thesis now and I need to generate a mult-level pseudo-random series to compare my method. Is there anyone possible to send me the program that can generate this series. Thanks you guys. Cheers, Jenny


LP filter..

Started by zkhodakaramiii in Matlab DSP19 years ago

hi colleagues... i have generated a random signal in matlab with normal distribution (my code is written below). my signal is high...

hi colleagues... i have generated a random signal in matlab with normal distribution (my code is written below). my signal is high frequency and i want to filter it to have lower frequencies at about 1/300


PRNG for dither

Started by will...@sygnvs.com in Matlab DSP19 years ago

Hi, I am currently researching dithered quantization. Does anyone know of a commonly used pseudo-random number generator that is used to...

Hi, I am currently researching dithered quantization. Does anyone know of a commonly used pseudo-random number generator that is used to produce dither signals? The application is not spefic to audio or video or images, I am just trying to compare the statistical properties of random signals which are quantized using different PRNG's to generate the dither signal. thanks, Will


Gaussian pdf

Started by rmartis80 in Matlab DSP19 years ago

Dear Sir, I am working on Gaussian random Process, where I am stuck from few days because of the following two difficulties. 1. I have...

Dear Sir, I am working on Gaussian random Process, where I am stuck from few days because of the following two difficulties. 1. I have different segments of Gaussian distributed random sequences, of which two sequences among them are templates . I need to find the joint pdf and thereby marginal pdf between a segment and the templates. And thereby the probability of the segment bei...


generating random waveform with gussian pdf

Started by altaanah2000 in Matlab DSP19 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...


Initial Seed Problem

Started by RIZWAN in Matlab DSP20 years ago

Hi I am working on a simulink model of bluetooth DM1 packet transmission. I have used a random generator for the input and also have used...

Hi I am working on a simulink model of bluetooth DM1 packet transmission. I have used a random generator for the input and also have used binary symmetric channel with a certain error probability. The problem is that i dont know how to specify the initial seed values for both the random generator and the symmetric channel. What can be the appropriate seed values. I have tried the s...


Re: PAPR Reduction or Pre-distortion Techniques for OFDM

Started by amit...@ittiam.com in Matlab DSP20 years ago 2 replies

I have gone thtough some literature on PAPR reduction techniques. Boardly i= t can be divided as: 1. Signal Processing 2. Coding (Random...

I have gone thtough some literature on PAPR reduction techniques. Boardly i= t can be divided as: 1. Signal Processing 2. Coding (Random encoding, Golay Sequence, Cyclic Code) 3. Random Scrambling (Costellation Design, Selective Mapping, Partial Trans= mit sequence) Of which I am mostly interested in the first one because that do not need a= ny change in the inner transmitter functions ...


Generating random no.s with a certain cdf

Started by Bavithi in Matlab DSP20 years ago 1 reply

Hello All,     If there is a certain CDF(Cumulative Distribution Function) , how can I generate random numbers ( source ) with the...

Hello All,     If there is a certain CDF(Cumulative Distribution Function) , how can I generate random numbers ( source ) with the same value of CDF ? Thank you!   Regards, Bavithi.


Correlated Random Sequences

Started by Shailesh Khanolkar in Matlab DSP20 years ago 2 replies

Hi, How do i generate correlated random sequences using Matlab? A sample code would be very helpful. Shailesh V Khanolkar

Hi, How do i generate correlated random sequences using Matlab? A sample code would be very helpful. Shailesh V Khanolkar


generate random vector with a given joint pdf

Started by tahm...@yahoo.com in Matlab DSP20 years ago

Hi all I am trying to generate a random vector (3x1) with a given multivariate probability distribution function. The joint pdf is very...

Hi all I am trying to generate a random vector (3x1) with a given multivariate probability distribution function. The joint pdf is very similar to Poisson distribution, but it is not directly convertible to Poisson. Any help on this would be highly appreciated. thanks in advance. Tahmina


PAPR calculation

Started by Sabbir Ahmed in Matlab DSP20 years ago

Dear All, I would highly appreciate if you share your thoughts on the correctness of the method for calculating PAPR value of OFDM signal as...

Dear All, I would highly appreciate if you share your thoughts on the correctness of the method for calculating PAPR value of OFDM signal as described below. I am using NRZ random bits as the random input data where the n point IFFT outputs are x1,x2..xn(complex values) for one OFDM symbol. peakpower=max(abs(x1).^2,abs(x2).^2,..abs(xn).^2) avgpower=sum((abs(x1).^2,abs(x2).^2..abs(xn).^2)/n


conv and deconv functions

Started by brijrajv in Matlab DSP22 years ago

Hi all, I am having problems using the combination of conv and deconv function. I have a large number of random processes...

Hi all, I am having problems using the combination of conv and deconv function. I have a large number of random processes which I convolve with its fliped version, then I deconvolve the result obtained from convolution with the fliped version of random process, the proce


normal random noise with zero mean, variance not equal to 1

Started by mao mu in Matlab DSP22 years ago 4 replies

Hi folks, How do I generate a random noise with zero mean, variance not equal to 1. randn() is for zero mean, variance=1 case....

Hi folks, How do I generate a random noise with zero mean, variance not equal to 1. randn() is for zero mean, variance=1 case. Thanks, Mu


conv and deconv functions

Started by brijrajv in Matlab DSP22 years ago

Hi all, I am having problems using the combination of conv and deconv function. I have a large number of random processes...

Hi all, I am having problems using the combination of conv and deconv function. I have a large number of random processes which I convolve with its fliped version, then I deconvolve the result obtained from convolution with the fliped version of random process, the proce


random coefficient for logit models

Started by guozhanmit in Matlab DSP23 years ago

Anybody here has experience on writing code for logit models with random coefficients? Thanks a lot!!!

Anybody here has experience on writing code for logit models with random coefficients? Thanks a lot!!!


conv and deconv functions

Started by brijrajv in Matlab DSP22 years ago

Hi all, I am having problems using the combination of conv and deconv function. I have a large number of random processes...

Hi all, I am having problems using the combination of conv and deconv function. I have a large number of random processes which I convolve with its fliped version, then I deconvolve the result obtained from convolution with the fliped version of random process, the proce


conv and deconv functions

Started by brijrajv in Matlab DSP22 years ago

Hi all, I am having problems using the combination of conv and deconv function. I have a large number of random processes...

Hi all, I am having problems using the combination of conv and deconv function. I have a large number of random processes which I convolve with its fliped version, then I deconvolve the result obtained from convolution with the fliped version of random process, the proce