OFDMA

Hello,

I am new in OFDMA for 802.16, I wonder how can we calculate bit per symbol
in wimax ? does this depnds on modulation and coding ? supposing that we
QPSK 3/4 ? how can I know the number of bit per symbol ? 

thanks,
Aleen 

Aleen said the following on 18/09/2006 15:40:
> Hello,
> 
> I am new in OFDMA for 802.16, I wonder how can we calculate bit per symbol
> in wimax ? does this depnds on modulation and coding ? supposing that we
> QPSK 3/4 ? how can I know the number of bit per symbol ? 
> 

It depends on what you mean by "bits".  The raw number of bits is given 
by the product of the number of data sub-carriers, the number of bits 
per constellation symbol (e.g. 2 for QPSK) and the overall code rate.

However, for "useful" bit rate, you must also take into account the 
various protocol overheads, which is pretty complicated in WiMAX.


-- 
Oli