Hi all.... I just simulated the Zero-Padding OFDM and Cyclic-Prefix OFDM system... I found some difference between their power spectrum density... In CP-OFDM, the in-band ripple is larger than ZP-OFDM... But in out-of-band, the ZP-OFDM is larger than CP-OFDM.... I just got the conclusion through simulation... How could i explain the phenomenon in physical or math. sense.... Anyone can tell me how to formulate it as a math problem..!? (any recommend paper or book also good)...Thx a lot!!
PSD in ZP-OFDM and CP-OFDM
Started by ●June 13, 2006
Reply by ●July 1, 20062006-07-01
ZP may be seen as CP at all. (looking the padded zeros as a part of the data block, ZP of the former OFDM symbol is CP of current OFDM symbol.) So the difference is mainly arised from the parameters. In your case, ZP-OFDM symbol is shorter than CP-OFDM symbol. That is all. chaselweng wrote:> Hi all.... > I just simulated the Zero-Padding OFDM and Cyclic-Prefix OFDM system... > I found some difference between their power spectrum density... > In CP-OFDM, the in-band ripple is larger than ZP-OFDM... > But in out-of-band, the ZP-OFDM is larger than CP-OFDM.... > I just got the conclusion through simulation... > How could i explain the phenomenon in physical or math. sense.... > > Anyone can tell me how to formulate it as a math problem..!? > (any recommend paper or book also good)...Thx a lot!!
