Maximun possible subcarriers and No. of FFT points - Optiwave

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This topic has 2 replies, 2 voices, and was last updated 8 years, 6 months ago by Duy Le Nguyen.

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- May 23, 2016 at 4:00 am #39335
  
  Duy Le Nguyen
  Participant
  
  Hi everyone!
  
  The maximun possible subcarriers of new OFDM modulator and no. of fft points of OFDM OS12 are same or different parameter?
  If they are same, why bandwidth of ofdm symbol is different in two sample files ( with same parameters, 1024 possible subcarriers and 512 subcarriers per port and same bit rate 10Gbps ):
  5GHz in OFDM OS12 and 2.5GHz in new OFDM modulator?
  What case is true?
  
  Thanks and regards.
- May 23, 2016 at 8:21 am #39337
  
  –
  Participant
  
  Hi Duy Le Nguyen, maximun possible subcarriers and no. of fft points of new OFDM modulator are same.
  
  I would like to suggest you not to use OS12 blocks, because it sometimes gives wrong result.
  
  Did you mean out of 1024 possible subcarriers and 512 subcarriers were used?
  
  If it is so, see the method of bandwidth calculation given in the component library that can be found in help. It is given as
  
  OFDM symbol period = Symbol period * 128 = 128/(Symbol rate) = 2 * 128 /Global bit rate.
  
  Are working on the sample files?
  
  Regards.
- May 23, 2016 at 8:50 am #39338
  
  Duy Le Nguyen
  Participant
  
  Hi Gokul.
  I’m working on sample file.
  Thank you for your answer. Now i knew it is wrong result on OS12 blocks.
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