hye there..i need help in doing simple ofdm in simulink. this model i refered from demo hiperlan2. the thing is, i can run the simulation with no...

hye there..i need help in doing simple ofdm in simulink. this model i refered from demo hiperlan2. the thing is, i can run the simulation with no errors warning. but in the end, my probability of error is still around 0.5 out of 1. anyone knows? here's my block sets of ofdm. http://www.4shared.com/file/44151590/4df6ea8e/simpleofdm1.html

Hi everbody, I am doing my M.SC thesis on the topic "ICI cancellation in OFDM". I have very limited time, if you can help me I will be...

Hi everbody, I am doing my M.SC thesis on the topic "ICI cancellation in OFDM". I have very limited time, if you can help me I will be grateful to you.... I can implement the OFDM structure in AWGN channel, it works very well.. But when i try to implement the system in a "rayleighchan", I obtain very bad BER results. -------------------------- N=256 ; % carriers GI=N/4; % Guar...

http://www.mathworks.com/matlabcentral/fileexchange/loadFile.do?objectId=6957 hi.. follow this link and download the m-fil... ofdm...

http://www.mathworks.com/matlabcentral/fileexchange/loadFile.do?objectId=6957 hi.. follow this link and download the m-fil... ofdm code is there... r u working in only ofdm... or u r workning on papr reduction also... thanku

Dear All ;   I have work as a telecommunication engineer. I have been making research and preparing thesis regarding with...

Dear All ;   I have work as a telecommunication engineer. I have been making research and preparing thesis regarding with OFDM and its applications for my work . To understand OFDM more and more, I want to simulate it with Matlab.   If it is possi

Hello, I am a french student to engineering and I am in search a matlab code or codes which are able to simulate GMSK and OFDM...

Hello, I am a french student to engineering and I am in search a matlab code or codes which are able to simulate GMSK and OFDM (for example matlab program which is very good for understanding GMSK OFDM and theirs concepts). I look forward to your reply. Best regards.

Hi all I have basic question regarding OFDM symbol genration.IFFT is taken to genrate a OFDM symbol.that part is undersood. My...

Hi all I have basic question regarding OFDM symbol genration.IFFT is taken to genrate a OFDM symbol.that part is undersood. My question is that whether that IFFT taken is complex or real.i believe it is complex as the ouput is shown to be assymetrical.so if it is complex,the data to be transmitted also has to be complex. from where we fill

Hi all, I have some problems in simulating the OFDM using matlab. I will list them one by one. 1). Normailsation of the signal after ifft...

Hi all, I have some problems in simulating the OFDM using matlab. I will list them one by one. 1). Normailsation of the signal after ifft & fft. Do we have to multiply by any factor after taking the ifft and fft in the matlab?. Please explain me about this for the OFDM symbol with Useful Subcarriers. 2). Finding the NoiseVariance in to create the

The statement in the subject is refering to Erich Cosby's tutorial for OFDM. I'm simulating OFDM in Simulink with the aim of later...

The statement in the subject is refering to Erich Cosby's tutorial for OFDM. I'm simulating OFDM in Simulink with the aim of later converting it for a DSP. I use BPSK before the OFDM operation. With BPSK, all my binary inputs would be converted to either 1 or -1 in the IQ spectrum. In Simulink, the outputs contain very small values for the ima

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

Dear all, If anyone working on Pre-distortion techniques for OFDM or PAPR Reduction Techniques for OFDM ...it is good idea if we get together...

Dear all, If anyone working on Pre-distortion techniques for OFDM or PAPR Reduction Techniques for OFDM ...it is good idea if we get together and discuss the issues and the literature through this forum... What do you think ?.. Waiting for your earliest attention.. Rgds, Jasan

Hi, I am new member. Now I am doing my M.Sc. I missed that file wich jeff gives you. Could you send me this file please. It it too much helpful to...

Hi, I am new member. Now I am doing my M.Sc. I missed that file wich jeff gives you. Could you send me this file please. It it too much helpful to me. thanks. > > > > > Dear All ; > ? > I have work as a telecommunication engineer. I have been making research and preparing thesis regarding with OFDM and its applications for my work . To understand OFDM more and more, I want

Hi, i've forgotten where i read about this but i know for OFDM, if i want the output of my IFFT to be real, i can only use half of...

Hi, i've forgotten where i read about this but i know for OFDM, if i want the output of my IFFT to be real, i can only use half of the subcarriers with the other half the complex conjugate mirror of the 1st half. It apparantly got to do with the properties of Fourier transform or something like that. I'm currently writing my report on OFDM. Can someone direct me to references or literature...

How are you everyone. In OFDM links, do we need frequency-domain equalization(FDE), after FFT block of the receiver? In books, it seems that...

How are you everyone. In OFDM links, do we need frequency-domain equalization(FDE), after FFT block of the receiver? In books, it seems that FDE is need if we have a TEQ (channel shortening time domain equalizer) as was studied by Al-Dhahir, etc. With TEQ, there will be phase errors, and I think that FDE can restore the phase. But I think that we don't actually use TEQ in OFDM links mo...

Dear all, I am a newbie and I have a basic question which I would like to get clarified. My intention is to simulate 802.11a which is based...

Dear all, I am a newbie and I have a basic question which I would like to get clarified. My intention is to simulate 802.11a which is based in OFDM. From the 802.11a standard I know that: -Number of Subcarriers, Nsc = 64 -Sampling Rate, fs = 20e6 sample/sec -BW = 20MHz -Carrier Frequency, fc = 5.25Ghz Now imagine that I have the following multipath channel: taps_delay = [0 10ns 20ns ...

Hi, I?m trying to calculate the PAPR in OFDM system, but I don?t know why there is no result? I know there is something wrong! Can any one help...

Hi, I?m trying to calculate the PAPR in OFDM system, but I don?t know why there is no result? I know there is something wrong! Can any one help me to get it? this is my program code close all clear all clc; M = 64; % QAM Modulation Level N = 256; % IFFT Size % QAM 16 MODULATION data = qammod(randint(1,N,M),M); % CALCULATE PAPR OF BASELINE OFDM ofdm_out =sqrt(length(data))*iff...

Hi everyone, I am doing Masters thesis in multiuser detection in OFDM. The basic model is y=hx+v . y is the mixture signal recieved by the...

Hi everyone, I am doing Masters thesis in multiuser detection in OFDM. The basic model is y=hx+v . y is the mixture signal recieved by the rxr, h is the channel matrix, x is the original signal txd, v is the noise added in the channel. Each rxr Antenna has to separate its corresponding user signal from the mixture of signals. Can I have the Matlab code for this. I have written the initi...

Hello Everyone, I started working recently on OFDM. I am trying to use simulink to build a simple system with four sub-carriers. However, I...

Hello Everyone, I started working recently on OFDM. I am trying to use simulink to build a simple system with four sub-carriers. However, I am unable to comprehend the results I am getting. Here is what I am doing: 1. I am using a Bernoulli Binary data Generator 2. It's output is QPSK modulated. 3. After separating the real and complex parts I concatenate the matrix and zero pad it to...

hi all, i'm trying to plot ofdm normalized (dBr) psd after ifft function. i.e: carriers=NFFT.*ifft(tx); %plot normalized PSD i've tried...

hi all, i'm trying to plot ofdm normalized (dBr) psd after ifft function. i.e: carriers=NFFT.*ifft(tx); %plot normalized PSD i've tried pwelch(), psd() and their varients but my results do not match the theory. i'll appreciate some help on the subject. thanks.

Hello all, Does anybody have a coding of Peak to Average Power Ratio reduction of ofdm in matlab. I would appreciate any...

Hello all, Does anybody have a coding of Peak to Average Power Ratio reduction of ofdm in matlab. I would appreciate any feedback.... Thanks. Kowsi

Hello Everyone! I am Ahsan and i am doing my final year (UG) project on OFDM. I was supposed to simulate the effects of noise and...

Hello Everyone! I am Ahsan and i am doing my final year (UG) project on OFDM. I was supposed to simulate the effects of noise and multipath fading on OFDM signal. I am using SIMULINK as the simulation tool.I have completed the noise simulation using the AWGN channel in SIMULINK but when i insert the Multi-path Rayleigh Fading Channel in my model i get the following error: Error rep...