Prev: Setting z scale in mesh plots
Next: Linking error when using rtw to compile sfunction builder block
From: mohammed on 28 May 2010 11:53
The channel sample period is equal to the Symbol Period divided by the number of samples put on the channel per symbol. The number of samples put on the channel per symbol is equal to the number of carriers plus any padding/conditioning needed for the IFFT plus any additional padding needed for cyclic prefixing and windowing. For example, if we take 802.11a OFDM standard, we have 48 subcarriers which are padded with additional 16 zeros (to make the ifft input vector a power of 2 just for implementation efficiency) then then additional 16 zeros are padded for cyclic prefix and windowing (guard interval) making the total of sample per symbol equal to 80. Now knowing that the symbol period is equal to 4usec (from the standard), the channel sample period should be 4usec/80. Hope this helps!
 | 
Pages: 1
Prev: Setting z scale in mesh plots
Next: Linking error when using rtw to compile sfunction builder block