hi, i would like to know if anyone have a rayleigh fading programming in Mfile format. i want to apply it on OFDM system and...

hi, i would like to know if anyone have a rayleigh fading programming in Mfile format. i want to apply it on OFDM system and plan to show the frequency offset due to the doppler shift. i really hope anyone can help me... thank you so much.. husn

I write this code to get IFFT for y but only spectrum drawn not time domain siganal ploted: t = -5:0.001:5; y1 =...

I write this code to get IFFT for y but only spectrum drawn not time domain siganal ploted: t = -5:0.001:5; y1 = sin(pi*(t+1))./(pi*(t+1)); y2 = sin(pi*(t+2))./(pi*(t+2)); y3 = sin(pi*(t+3))./(pi*(t+3)); y0 = sin(pi*t)./(pi*t); y11= sin(pi*(t-1))./(pi*(t-1));

Hi : I am work on QAMand OFDM modulation project, and during the simulation I get the out of memory error after the message...

Hi : I am work on QAMand OFDM modulation project, and during the simulation I get the out of memory error after the message length large than 11, so I follow the help menu's instruction to expanded the memory into 4GB, but I still get the same error, so I need some

Dear All; I want to plot orthogonality between sub-carriers with Matlab for five or more than five sub-carriers.If anyone have a...

Dear All; I want to plot orthogonality between sub-carriers with Matlab for five or more than five sub-carriers.If anyone have a code to plot orthogonality between sub-carriers Could you supply it to me? I look forward to your reply. Kind Regards.

I'm currently doing a project on OFDM signal generation. I plan to write my codes in Matlab and later convert it into C and then download...

I'm currently doing a project on OFDM signal generation. I plan to write my codes in Matlab and later convert it into C and then download it into DSPs. My question is, when i use the fft/ifft functions that come with Matlab, when i convert it and download it into the DSP. Will it have any problem? Will the fft/ifft operation be same on the DSP?

I have some questions regarding implementing OFDM in Simulink... I'm using BPSK, thus my output after BPSK would be a complex number. ...

I have some questions regarding implementing OFDM in Simulink... I'm using BPSK, thus my output after BPSK would be a complex number. I've splited up the real (16 samples) and imag (16 samples) numbers into 2 matrices. I plan to use IFFT with 64 samples. Except for the DC (sample 1), Nyquist center frequency (sample 32) and the real (13~31) and i

Hello,   I have generated non-squared 16-QAM symbols. These are 16 symbols in one constellation and I want to assign this date to...

Hello,   I have generated non-squared 16-QAM symbols. These are 16 symbols in one constellation and I want to assign this date to 64element matrix. For clarity, I am trying to generate non-squared QAM symbols to be mapped into 64 subcarriers for OFDM simulation. When I try to perform this, I get an index mismatch error.  

Hello all, Can anyone help me out with finding out how to plot the mean square error estimate plot... I am working on Time synchronisation...

Hello all, Can anyone help me out with finding out how to plot the mean square error estimate plot... I am working on Time synchronisation of OFDM and wish to plot MSE for the time deviations... Thanking u, Arvindhan Kumar

Hello everyone. I recently joined this group. I'm a PhD student pursuing equalization. I'm interested in TEQ(shortening filter) and FEQ ( freq...

Hello everyone. I recently joined this group. I'm a PhD student pursuing equalization. I'm interested in TEQ(shortening filter) and FEQ ( freq domain equalization). But to me, it seems that these two have been studied mostly in the context of DMT(DSL). Literature does say that in DSL, delay spread can be up to 100 symbols, thus TEQ and/or FEQ may be needed. But now, in wireless, OFD...

Hi All, I have a basic doubt about pilot tones. I am working with OFDM systems and I am trying to implement pilot tones for a 64 subcarrier...

Hi All, I have a basic doubt about pilot tones. I am working with OFDM systems and I am trying to implement pilot tones for a 64 subcarrier system. I set aside 4 tones for pilot data in frequency domain. However, according to a fwe books I've read, I learn that pilot tones , which are used for channel estimation ,change their position according to some pattern (discussed in the literatur...

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 ...

I have implemented an OFDM communication system in Simulink. I am using Link to CCS and CCSv3.1 Platinum to build the model and transfer data to...

I have implemented an OFDM communication system in Simulink. I am using Link to CCS and CCSv3.1 Platinum to build the model and transfer data to one TI C6713 board. The output of the board goes to the input of a second C6713 board. The problem is I do not know how to transfer the received data (from the second board) back to simulink. Using the Line in ADC block digitizes and transfers the r...

Hello, maybe someone can shed a little light on this subject. I've been researching the different PAPR reduction techniques and I feel like I have...

Hello, maybe someone can shed a little light on this subject. I've been researching the different PAPR reduction techniques and I feel like I have a pretty good handle on the subject although I've reached a road block. I've successfully implemented the selected mapping technique in Matlab but when I implemented the partial transmit sequence technique I got poor results, only a very small PAPR redu...

Dear All, I'm implementing a Matlab DVB-T system; in order to test it, I' like to see if the performance are matching to the ETSI's standard...

Dear All, I'm implementing a Matlab DVB-T system; in order to test it, I' like to see if the performance are matching to the ETSI's standard performances. The problem is the standard ask to set 18 dB for the Carrier over Noise Ratio (C/N)..but I only know how to set the Signal to Noise ratio (SNR)in my code's parameters. Can someone please tell me how to convert the C/N to SNR in the OFDM t...

I am doing a project regarding OFDM.I used 64 QAM to modulate the data . The output of QAM is complex. Can the complex output be given...

I am doing a project regarding OFDM.I used 64 QAM to modulate the data . The output of QAM is complex. Can the complex output be given directly to perform IFFT ?

hi jeff i am trying doing the same....can you plz guide.... I have implemented an OFDM communication system in Simulink. I am using Link to CCS...

hi jeff i am trying doing the same....can you plz guide.... I have implemented an OFDM communication system in Simulink. I am using Link to CCS and CCSv3.1 Platinum to build the model and transfer data to one TI C6713 board. The output of the board goes to the input of a second C6713 board. > > The problem is I do not know how to transfer the received data (from the second board) back to simul

Dear all I have a question about MIMO In Multiuser Detection in MIMO (or MIMO-OFDM) systems using MMSE, when using number of transmit...

Dear all I have a question about MIMO In Multiuser Detection in MIMO (or MIMO-OFDM) systems using MMSE, when using number of transmit antennas is equal number of receive antennas or number of transmit antennas is fewer number of receive antennas, which give the better results? Why? Hope to have your helpings. Thanks

Hi friends, I have been investigating on the applicability of power line communications techniques. I want to simulate the plc system in ...

Hi friends, I have been investigating on the applicability of power line communications techniques. I want to simulate the plc system in MATLAB (m file).The simulation includes FSK and PSK and OFDM modulation and demodulation , error control coding , powerline channel and the noise over it. I have some problems with these simulations . I want to know if you have any MATLAB files (m fil...

i am doing project on OFDM channel estimation,part of that is we have to transmit data from the soundcard(speaker) and on the reciever end i have...

i am doing project on OFDM channel estimation,part of that is we have to transmit data from the soundcard(speaker) and on the reciever end i have to collect the data through mic. i am having very difficulty in the synchronization of transmitter and reciever,therefore i need help of yours in the form of ideas and matlab codes so that i can transmit from one computer and recieve data from other one...

hi i am working on OFDM .....i can represent the overlapping subcariers using the following code x = -60:0.01:60 for i=2:1:6 ...

hi i am working on OFDM .....i can represent the overlapping subcariers using the following code x = -60:0.01:60 for i=2:1:6 % Y=(dn(i)*sinc(x-i)); Y1=Y+Y1; plot(x,Y,'b--'); hold on; end where dn is array of complex numbers that are QAM modulated.......i want to ask that multiplying the sinc function with a complex numbers resul...