[ns] Preample issue in 802.11a mac layer

[Gabrial Monty]

Dear all,
   
  I want to simulate the detailed behavior of 802.11a mac layer where I want to consider the preample and the PLCP header when calculating the transmission time and the PER of a data packet. For the PLCP header it is specified in the standard its size and the data rate used to transmit it which is 24 bits (without the Service field) and it is transmitted at 6 Mbps. But what about the peample? what I have found is that it is composed of 12 Symbols and needs 16us to be transmitted, but what is the Symbol? and what is the size of a symbol in bits? Moreover, many papers do not include the preample size while calculating the PER and they incorporate its transmission time in the total data packet transmission time, can I use the same approach in my simulations?
   
  Thanks and waiting your reply,
   
  gaby

       
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