## PAPR calculation

Started by in Matlab DSP14 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

## Re: PAPR Reduction or Pre-distortion Techniques for OFDM

Started by in Matlab DSP13 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 ...

## plotting a random variable in matlab

Started by in Matlab DSP12 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 :)

## Orthogonal random matrix

Started by in Matlab DSP11 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

## Pseudo-random sequence and pilots in OFDM

Started by in Matlab DSP14 years ago 3 replies

Hi, i'm doing a project on OFDM and currently i'm just playing around and exploring with the HiperLan/2 demo that comes together with...

Hi, i'm doing a project on OFDM and currently i'm just playing around and exploring with the HiperLan/2 demo that comes together with Simulink. I noticed at OFDM transmission, pilots are inserted and these pilots are single sample datas inserted regularly btwn the actual data. These pilots are generated by a Pseudo-random binary generator block. Wha

## Gaussian pdf

Started by in Matlab DSP13 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 in Matlab DSP13 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...

## how to make random binary bits!?

Started by in Matlab DSP14 years ago 4 replies

how to make random binary bits with probability 0.5 for both zeros and ones!?

how to make random binary bits with probability 0.5 for both zeros and ones!?

## MEX functions and random numbers

Started by in Matlab DSP11 years ago

Hello all, I want to write a MEX function to import a part of C code into MATLAB. This piece of code is a normally distributed random number...

Hello all, I want to write a MEX function to import a part of C code into MATLAB. This piece of code is a normally distributed random number generator. It is controlled by a seed() function which has to be called to initialize the algorithm. What I am trying to do is to call this seed() function inside the MEX file using a specific number as its arguments (seed(10), for example) in order to get ...

## generate random vector with a given joint pdf

Started by in Matlab DSP14 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

## Removings spikes in a data set

Started by in Matlab DSP9 years ago

> Hi, > I am wondering is there any way to remove random spikes in the data.? > If someone can help me I can send out a sample of my data...

> Hi, > I am wondering is there any way to remove random spikes in the data.? > If someone can help me I can send out a sample of my data set. > Your help is highly regarded > Thanks > Thisara Thisara, There are a lot of ways you can remove random spikes in data. You can do some kind of running average (i.e., a lowpass filter), you can simple remove data points which exceed some thre

## Random mumber generation over a period of time

Started by in Matlab DSP18 years ago 1 reply

I want to build a code that generates random numbers.Those numbers represent calls arriving over a period of time. The maximum...

I want to build a code that generates random numbers.Those numbers represent calls arriving over a period of time. The maximum number of calls that can be accepted is 15000 calls. When this number is reached the operation should stop and the mean number of calls for the counted period of t

## Initial Seed Problem

Started by in Matlab DSP13 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...

## how can i generate psuedo random numbers in matlab?

Started by in Matlab DSP10 years ago 1 reply

hi there, how can i generate psuedo random numbers (by one or different) seed in matlab? that's very kind of you.

hi there, how can i generate psuedo random numbers (by one or different) seed in matlab? that's very kind of you.

## Non Uniform data interpolation

Started by in Matlab DSP14 years ago 3 replies

Hi I have a data vector x with uniform data points say [1 2 3 4 5] and another data vector x_random with random data points say [.9 2.3...

Hi I have a data vector x with uniform data points say [1 2 3 4 5] and another data vector x_random with random data points say [.9 2.3 3.6 3.8 5.9] The signal vector corresponding to random data is known and it consists of complex numbers like [-1 +i 2+2i 4-2i 1+3i -2+i]. The problem is that i want to interpolate nonuniform data points to get complex data correspondi

## Generating random no.s with a certain cdf

Started by in Matlab DSP14 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.

## How to do FFT of random signal?

Started by in Matlab DSP13 years ago

Using Hanning window. I want to plot the Magnitude_Frequency figure. Which command should I use? Thanks! =20 =20

Using Hanning window. I want to plot the Magnitude_Frequency figure. Which command should I use? Thanks! =20 =20

## random-rand

Started by in Matlab DSP13 years ago 2 replies

Hi there! Question pls... whats the meaning of randn(51,1)? what if I reverse it to randn(1,51)? Thanks to all!

Hi there! Question pls... whats the meaning of randn(51,1)? what if I reverse it to randn(1,51)? Thanks to all!

## Get PSD from a dat file analytically

Started by in Matlab DSP5 years ago 1 reply

Hi everyone, I would like to get the power spectral density from a random data numbers. Can I get this analytically after processing with...

Hi everyone, I would like to get the power spectral density from a random data numbers. Can I get this analytically after processing with matlab. Thank you.

## HOS

Started by in Matlab DSP18 years ago

Hi Does anybody have any idea about how I should go about the bispectrum estimation of a random data set when my matlab version...

Hi Does anybody have any idea about how I should go about the bispectrum estimation of a random data set when my matlab version does not support the HOS toolbox?? thanks in advance __________________________________________________