OFDM frequency spectrum

Started by Hussain in Matlab DSP12 years ago 1 reply

Hello guys, I don't know a lot about matlab simulink, so I was wondering if someone can help me so I can figure out the spectrum of an ofdm. I...

Hello guys, I don't know a lot about matlab simulink, so I was wondering if someone can help me so I can figure out the spectrum of an ofdm. I want the complex data out from the transmitter to be analogized separately- I mean the real and imaginary signals each one alone- then digitized by a sampling rate that is twice the value of the digital transmitted signal. Thanks in advance, Huss...


OFDM

Started by pinkrose6590 in Matlab DSP15 years ago 2 replies

Hello Friends, My name is paulami and i am working as a communication engineer in U.S. Recently I have a project based on OFDM simulation...

Hello Friends, My name is paulami and i am working as a communication engineer in U.S. Recently I have a project based on OFDM simulation in MATLAB. As this software is new for me, I am unable to simulate it. Can anyone send me the simulation code plotting the spectrum or any model designed by communication blockset. It will be a great help to me. Thank you, Best regards. ...


OFDM System

Started by Moayid Ahmed in Matlab DSP13 years ago

Hi, I'm new member in this group. I'm trying to do MATLAB code for OFDM Tx and Rx and measure and plot all the system parameters like BER, PAPR,...

Hi, I'm new member in this group. I'm trying to do MATLAB code for OFDM Tx and Rx and measure and plot all the system parameters like BER, PAPR, Synchronization, Channel Estimation and others. here is my first and starting attempt. can any one help me to complete this program? Regards. Here is my initial program clear all; close all; clc; %=================================================...


FFT and IFFT in OFDM

Started by ping...@hotmail.com in Matlab DSP16 years ago

Can we use directly the FFT and IFFT functions in Matlab for OFDM simulation? I found IFFT(AWGN) will result in strange mean and variance. ...

Can we use directly the FFT and IFFT functions in Matlab for OFDM simulation? I found IFFT(AWGN) will result in strange mean and variance.


Please Help me : Coding & OFDM & Rayleigh fading

Started by Tam BigBoy in Matlab DSP17 years ago 1 reply

Hi all !!! I use Convolutional code (decode with Veterbi) for OFDM (BPSK modulation) over Rayleigh fading (having interleaver and not)....

Hi all !!! I use Convolutional code (decode with Veterbi) for OFDM (BPSK modulation) over Rayleigh fading (having interleaver and not). But it seems not to improve. If you have any experience about it, please help me !!! Thank you Tam


filters used in ofdm modem

Started by l040...@nu.edu.pk in Matlab DSP14 years ago

Hi, i need to know what filters can be used in order to design an OFDM modem? and how can we stimulate them in matlab?

Hi, i need to know what filters can be used in order to design an OFDM modem? and how can we stimulate them in matlab?


matlab code(ofdm power reduction)

Started by kowsalya premkumar in Matlab DSP14 years ago

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


ofdm synchronization

Started by fpyzak in Matlab DSP18 years ago

Does any one have ofdm receiver matlab code? I am interested in seeing how the pilot symbols and cyclic prefix are...

Does any one have ofdm receiver matlab code? I am interested in seeing how the pilot symbols and cyclic prefix are used to synchronize the receiver. Even if you dont have matlab code, a general description of the a


PAPR calculation for OFDM systems.

Started by Sabbir Ahmed in Matlab DSP16 years ago

Dear All!! I have a project going related to PAPR of OFDM systems.Can any one help me with codes to calculate PAPR? Thanks in...

Dear All!! I have a project going related to PAPR of OFDM systems.Can any one help me with codes to calculate PAPR? Thanks in Advance. Sabbir __________________________________________________ "> http://mail.yahoo.com


OFDM matlab files .. need ur help !

Started by gloria57_99 in Matlab DSP18 years ago

Iam doing my final project in OFDM software implementation ... using matlab programing ... and DQPSK modulation technique ... I have...

Iam doing my final project in OFDM software implementation ... using matlab programing ... and DQPSK modulation technique ... I have problem in the QPSKEncoder code that when any M-file calls it , it gives me error message saying that : ??? Index exceeds matrix dimensions. Erro


OFDM Simulation

Started by sundar janaa in Matlab DSP16 years ago

Dear all, I have some problems regarding the simulation of OFDM Chain to obtain the BER curve...Pls help me ..it is very urgent. Great...

Dear all, I have some problems regarding the simulation of OFDM Chain to obtain the BER curve...Pls help me ..it is very urgent. Great helps are appreciated. 1). Noise Variance & Zero Padding...- in my understanding , we have to normalize the tranmited bits not the symbol when plotting the BER vs EbNo curve. Is that right?. After qpsk modulation .


inputing text and audio into malab

Started by pkab...@tech.mak.ac.ug in Matlab DSP16 years ago

hi friends i am doing a project about an Othogonal Frequency Division Multiplexing(OFDM) transmission scheme. any body tell me how i can input...

hi friends i am doing a project about an Othogonal Frequency Division Multiplexing(OFDM) transmission scheme. any body tell me how i can input alphanumeric text or audio files into matlab(eg simulink). also send me some OFDM code if you have it. expecting earliest reply thanx. peter


frequency selective fading for OFDM

Started by nishchal chaudhary in Matlab DSP17 years ago 1 reply

hii all, I am trying to make a simulation program for OFDM.My modulation technique is BPSK.after doing the mapping of original to ...

hii all, I am trying to make a simulation program for OFDM.My modulation technique is BPSK.after doing the mapping of original to BPSK signal space, I am taking say N of those symbols and performing IFFT(I conjugate and append my BPSK data set so as to obtain a real signal out of the IFFT block).Now my problem goes like this- 1) how do i m


OFDM USING MATLAB

Started by gloria57_99 in Matlab DSP18 years ago

Hi Iam doing my final project in OFDM System suing QPSK modulation technique... and Iam facing real troubles dealing wiht its...

Hi Iam doing my final project in OFDM System suing QPSK modulation technique... and Iam facing real troubles dealing wiht its matlab programs !!! I have the programs already but they r not working properly ! for example , some times it shows this eror : ??? Strings passed to


OFDM channel modelling and estimation

Started by davi...@yahoo.com in Matlab DSP15 years ago

Dear all, I am David Lee and as a new member to this group I send my regards to everyone. I will be very grateful if anyone could help to...

Dear all, I am David Lee and as a new member to this group I send my regards to everyone. I will be very grateful if anyone could help to model multipath fading for the IEEE 802.11a OFDM standard and also tell me which channel estimation technique to use for that standard. So far I know that given the impulse response of a multi-path fading channel we can represent it as a vector for e.g ...


Ofdm synchronisation, estimation of time and frequencyoffset

Started by bekolodwc in Matlab DSP14 years ago

Hi all, nice to have subscribed in this site. But for the moment I got 1 problem , the synchronisation algorithm,or the Maximum...

Hi all, nice to have subscribed in this site. But for the moment I got 1 problem , the synchronisation algorithm,or the Maximum Likelihood estimation of time and frequency offset in OFDM systems with the algoithm of "Jan Jaap van de beek, Magnus Sandell, and per Ola Borjesson", in MATLAB (6.5, or 7(R2006a)).Here is the code, that I have written but for the first time has worked, but not now,...


Modelling of ISI n ICI for OFDM system

Started by rasool_jawad in Matlab DSP16 years ago

Hi, i am trying to simulate an OFDM transmission system in matlab. AWGN noise can be modelled as a normal distribution using the randn...

Hi, i am trying to simulate an OFDM transmission system in matlab. AWGN noise can be modelled as a normal distribution using the randn function. But can anyone guide me how to model ISI and ICI noise in my simulation. if anyone has a code for this or can help me in this regard, please reply. jawad


mc-cdma matlab simulation

Started by omhr81 in Matlab DSP14 years ago

Hi, i m trying to simulate mc-cdma BER performance using MATLAB and since mc-cdma is composed of the integration of DS-CDMA and OFDM so my first...

Hi, i m trying to simulate mc-cdma BER performance using MATLAB and since mc-cdma is composed of the integration of DS-CDMA and OFDM so my first step was building an OFDM model which passes bits on to a "pskmod" mapper and then to "ifft", and the reverse at the receiver side. When integrating with DS-CDMA for multiusers i m facing the problem that "pskmod" function only accepts positive val...


BER in a rayleigh faded channed using OFDM

Started by Shabab in Matlab DSP14 years ago

I am really glad to be a part of this group and i am sure that there is some one out there who would help me in this problem of mine. I need...

I am really glad to be a part of this group and i am sure that there is some one out there who would help me in this problem of mine. I need to find ways to plot a curve of BER in matlab. A rayleigh faded environment using OFDM technique. Could some one please post a matlab file or a link to such a file which could help me. Thanx Shabab p.s. i have looked for such files in mathw...


OFDM PSD

Started by disa...@gmail.com in Matlab DSP14 years ago 1 reply

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.