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IFFT & DAC in IFFT

Started by Unknown September 26, 2005
Hi,

 I am doing project in OFDM .I have doubts regarding the functionality
of IFFT & DAC in OFDM TX.
In OFDM block Where the carrier comes into picture?.
After IFFT what is exactly done in DAC block?.
There we are using any carrier suppliers?.
IF possible anybody can explain the flow of data in OFDM Tx.

can anybody help me out regarding the above queries.

Thanks & Regards
Lakku Rajiv

>Hi, > > I am doing project in OFDM .I have doubts regarding the functionality >of IFFT & DAC in OFDM TX. >In OFDM block Where the carrier comes into picture?. >After IFFT what is exactly done in DAC block?. >There we are using any carrier suppliers?. >IF possible anybody can explain the flow of data in OFDM Tx. > >can anybody help me out regarding the above queries. > >Thanks & Regards >Lakku Rajiv > >
Hi, The IFFT, given the frequency domain input, is giving the corresponding time samples.This is basically implementing the set of baseband multicarriers. This is a very good article on OFDM- gives you a better feel for the concept.http://www.complextoreal.com/chapters/ofdm2.pdf