Hi, I have a question on IFFT input in OFDM systems. Why center tone is always set to ZERO for IFFT input ? is it one method to reduce PAPR in OFDM systems ? _____________________________ Posted through www.DSPRelated.com
OFDM symbol
Started by ●June 16, 2014
Reply by ●June 16, 20142014-06-16
On Mon, 16 Jun 2014 09:14:09 -0500, "harishm" <98552@dsprelated> wrote:>Hi, > >I have a question on IFFT input in OFDM systems. > >Why center tone is always set to ZERO for IFFT input ? > >is it one method to reduce PAPR in OFDM systems ?No, it is for DC offset immunity in direct-conversion systems. Systems that aren't direct-conversion can use the middle carrier for information. Eric Jacobsen Anchor Hill Communications http://www.anchorhill.com