Hi,
As OS12 doesn’t have training and pilot symbol ports.
And Pilot sequences are the unmodulated data we are transmitting along
with the data.Pilots are used for syncronization and Channel estimation purposes.
Channel estimation is the main thing we need to concentrate for improving the channel capacity .
More the number of pilots more efficeintly we can estimate the channel and increase the capacity .
But as pilots increases overhead increases. so the selection of pilots is such that
tradeoff should be considered between pilots symbols and spectral efficiency.
As we know OFDM Modulation (OS12) component modulates a digital signal into multiple orthogonal sub-carriers.
Orthogonal Frequency Division Multiplexing [1] is a multi-carrier transmission technique, which divides the available spectrum into many carriers, each one being modulated by a low rate data stream.
Due to presence of training and pilot symbol ports in OS13 causes difference in results to that with OS12.
Thanks