about OFDM system

[phterife]

hello everybody ,
i have a question about an OFDM system. Why do they use the block IFFT in the transmiter and FFT block in receiver ? Would u please show me the formulas ,the respond signals after they pass a block diagram and the working of the Channel Estimation ?
Thank you very much .

 

[qwertyui]

Hi there!
Try the link

http://cegt201.bradley.edu/projects/proj2001/ofdmprjt/

and click "Matlab work".

Download 'ofdm final paper.zip'.

In 'final report.doc' (Word) you can find some fundamentals about OFDM.